Usenet 1994 January/usenetsourcesnewsgroupsinfomagicjanuary1994.iso/sources/unix/volume26/cook-1.4/part09

Text File | 1993-05-03 | 82.9 KB | 4,419 lines

Newsgroups: comp.sources.unix
From: [e-mail] (Peter Miller)
Subject: v26i217: cook-1.4 - a file construction tool (like "make"), Part09/11
Sender: [e-mail]
Approved: [e-mail]

Submitted-By: [e-mail] (Peter Miller)
Posting-Number: Volume 26, Issue 217
Archive-Name: cook-1.4/part09

#! /bin/sh
# This is a shell archive.  Remove anything before this line, then unpack
# it by saving it into a file and typing "sh file".  To overwrite existing
# files, type "sh file -c".  You can also feed this as standard input via
# unshar, or by typing "sh <file", e.g..  If this archive is complete, you
# will see the following message at the end:
#        "End of archive 9 (of 11)."
# Contents:  cook/lex.c cook/os.c cooktime/date.y
# Wrapped by [e-mail] on Tue May  4 01:36:42 1993
PATH=/bin:/usr/bin:/usr/ucb ; export PATH
if test -f 'cook/lex.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'cook/lex.c'\"
else
echo shar: Extracting \"'cook/lex.c'\" \(26740 characters\)
sed "s/^X//" >'cook/lex.c' <<'END_OF_FILE'
X/*
X *    cook - file construction tool
X *    Copyright (C) 1990, 1991, 1992, 1993 Peter Miller.
X *    All rights reserved.
X *
X *    This program is free software; you can redistribute it and/or modify
X *    it under the terms of the GNU General Public License as published by
X *    the Free Software Foundation; either version 2 of the License, or
X *    (at your option) any later version.
X *
X *    This program is distributed in the hope that it will be useful,
X *    but WITHOUT ANY WARRANTY; without even the implied warranty of
X *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X *    GNU General Public License for more details.
X *
X *    You should have received a copy of the GNU General Public License
X *    along with this program; if not, write to the Free Software
X *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X *
X * MANIFEST: functions to perform lexical analysis on cookbooks
X *
X * This file contains the lexical analyser for the cookbook parser.
X * A known bug is that it processes # control lines even within comments.
X * Another bug is that comments vanish: they should be replaced by a single
X * space.
X */
X
X#include <stddef.h>
X#include <string.h>
X#include <stdlib.h>
X#include <stdio.h>
X
X#include <error.h>
X#include <expr.h>
X#include <hashline.h>
X#include <id.h>
X#include <lex.h>
X#include <mem.h>
X#include <option.h>
X#include <s-v-arg.h>
X#include <stmt.h>
X#include <trace.h>
X#include <parse.gen.h>    /* must be last */
X#include <hashline.gen.h> /* must be last */
X
X
X/*
X * Meta types
X */
X#define NORMAL    1
X#define SLOSHED    2
X#define WHITE    3
X
X/*
X */
X#define BEFORE    (1<<0)
X#define AFTER    (1<<1)
X#define SINGLE    (1<<2)
X
X#define HASHLINE_ESCAPE ('#' ^ 0x80)
X#define UNQUOTED_WORD 32767
X#define EOLN 32766
X
X
Xtypedef struct meta_ty meta_ty;
Xstruct meta_ty
X{
X    int        m_type;        /* meta character "type" info    */
X    int        m_char;        /* meta character actual value    */
X    int        m_flag;        /* meta character flags        */
X};
X
Xtypedef struct lex_ty lex_ty;
Xstruct lex_ty
X{
X    string_ty    *l_name;    /* name of file being analysed    */
X    FILE        *l_file;    /* open file structure of the file */
X    int        l_line;        /* the line number we are up to    */
X    meta_ty        l_mback;    /* backup for meta chars    */
X    lex_ty        *l_chain;    /* file this one is an insert from */
X    short        l_bol;
X};
X
Xtypedef struct stracc stracc;
Xstruct    stracc
X{
X    size_t        sa_max;        /* size of string accum buffer    */
X    size_t        sa_len;        /* number of chars accumulated    */
X    char        *sa_buf;    /* the string accum buffer    */
X    int        sa_inuse;
X};
X
Xstatic    lex_ty        *root;        /* root of insert list        */
Xstatic    stracc        saroot;        /* root of string accum list    */
Xstatic    int        errcnt;        /* count of errors to date    */
Xstatic    int        mode;        /* what lex mode we are in    */
Xstatic    int        state;
Xstatic    int        passing;
Xstatic    int        catted;
X
X
X/*
X * NAME
X *    lex_initialize - look for keywords
X *
X * SYNOPSIS
X *    int lex_initialize(void);
X *
X * DESCRIPTION
X *    The lex_initialize function adds all the keywords to the symbol table.
X *
X * CAVEAT
X *    The keywords are intentionally case sensitive.
X *    Assumes that str_initialize has already been called.
X */
X
Xvoid
Xlex_initialize()
X{
X    typedef struct keyword_ty keyword_ty;
X    struct keyword_ty
X    {
X        char        *k_name;
X        int        k_token;
X        id_class_ty    k_class;
X    };
X
X    static keyword_ty keyword[] =
X    {
X        { ":",        COLON,        ID_CLASS_PARSE_KEYWORD,    },
X        { ";",        SEMICOLON,    ID_CLASS_PARSE_KEYWORD,    },
X        { "=",        EQUALS,        ID_CLASS_PARSE_KEYWORD,    },
X        { "[",        LBRAK,        ID_CLASS_HASH_KEYWORD,    },
X        { "[",        LBRAK,        ID_CLASS_PARSE_KEYWORD,    },
X        { "]",        RBRAK,        ID_CLASS_HASH_KEYWORD,    },
X        { "]",        RBRAK,        ID_CLASS_PARSE_KEYWORD,    },
X        { "data",    DATA,        ID_CLASS_PARSE_KEYWORD,    },
X        { "elif",    HASH_ELIF,    ID_CLASS_HASH_KEYWORD,    },
X        { "else",    ELSE,        ID_CLASS_PARSE_KEYWORD,    },
X        { "else",    HASH_ELSE,    ID_CLASS_HASH_KEYWORD,    },
X        { "endif",    HASH_ENDIF,    ID_CLASS_HASH_KEYWORD,    },
X        { "fail",    FAIL,        ID_CLASS_PARSE_KEYWORD,    },
X        { "if",        HASH_IF,    ID_CLASS_HASH_KEYWORD,    },
X        { "if",        IF,        ID_CLASS_PARSE_KEYWORD,    },
X        { "ifdef",    HASH_IFDEF,    ID_CLASS_HASH_KEYWORD,    },
X        { "ifndef",    HASH_IFNDEF,    ID_CLASS_HASH_KEYWORD,    },
X        { "include",    HASH_INCLUDE,    ID_CLASS_HASH_KEYWORD,    },
X        { "loop",    LOOP,        ID_CLASS_PARSE_KEYWORD,    },
X        { "loopstop",    LOOPSTOP,    ID_CLASS_PARSE_KEYWORD,    },
X        { "pragma",    HASH_PRAGMA,    ID_CLASS_HASH_KEYWORD,    },
X        { "set",    SET,        ID_CLASS_PARSE_KEYWORD,    },
X        { "then",    THEN,        ID_CLASS_PARSE_KEYWORD,    },
X        { "unsetenv",    UNSETENV,    ID_CLASS_PARSE_KEYWORD,    },
X        { "{"/*}*/,    LBRACE,        ID_CLASS_PARSE_KEYWORD,    },
X        { /*{*/"}",    RBRACE,        ID_CLASS_PARSE_KEYWORD,    },
X    };
X    keyword_ty    *kp;
X
X    trace(("init_reserved()\n{\n"/*}*/));
X    passing = 1;
X    for (kp = keyword; kp < ENDOF(keyword); ++kp)
X    {
X        string_ty    *s;
X
X        s = str_from_c(kp->k_name);
X        id_assign(s, kp->k_class, &kp->k_token);
X        str_free(s);
X    }
X    trace((/*{*/"}\n"));
X}
X
X
X/*
X * NAME
X *    lex_open - open a file for lexical analysis
X *
X * SYNOPSIS
X *    void lex_open(string_ty *filename);
X *
X * DESCRIPTION
X *    Lex_open opens a file for lexical analysis
X *    (it is also used to open include files).
X *
X * RETURNS
X *    void
X */
X
Xvoid
Xlex_open(filename)
X    string_ty    *filename;
X{
X    lex_ty        *new;
X
X    trace(("lex_open(filename = %08lX)\n{\n"/*}*/, filename));
X    trace_string(filename->str_text);
X    for (new = root; new; new = new->l_chain)
X    {
X        if (str_equal(filename, new->l_name))
X        {
X            lex_error("%s: recursive include", filename->str_text);
X            return;
X        }
X    }
X    new = (lex_ty *)mem_alloc_clear(sizeof(lex_ty));
X    new->l_name = str_copy(filename);
X    new->l_file = fopen(filename->str_text, "r");
X    if (!new->l_file)
X        nfatal("cookbook \"%s\"", filename->str_text);
X    new->l_line = 1;
X    new->l_bol = 1;
X    new->l_chain = root;
X    root = new;
X    trace((/*{*/"}\n"));
X}
X
X
X/*
X * NAME
X *    lex_close - closes a file which was open for lexical analysis
X *
X * SYNOPSIS
X *    void lex_close(void);
X *
X * DESCRIPTION
X *    Lex_close closes a file previously opened for lexical analysis.
X *
X * CAVEAT
X *    Lex_open must have been previously used to open the file.
X */
X
Xvoid
Xlex_close()
X{
X    lex_ty        *old;
X
X    trace(("lex_close()\n{\n"/*}*/));
X    assert(root);
X    old = root;
X    fclose(root->l_file);
X    root = old->l_chain;
X    if (!root && errcnt)
X        exit(1);
X    str_free(old->l_name);
X    free(old);
X    trace((/*{*/"}\n"));
X}
X
X
X/*
X * NAME
X *    illeof - conplain about an illegal end-of-file
X *
X * SYNOPSIS
X *    void illeof(void);
X *
X * DESCRIPTION
X *    Illeof is used to complain about illegal end-of-file.
X *    This may occu in several places.
X *
X * CAVEAT
X *    It does not return.
X */
X
Xstatic void illeof _((void));
X
Xstatic void
Xilleof()
X{
X    lex_error("unexpected end of file");
X    exit(1);
X}
X
X
X/*
X * NAME
X *    byte - get a byte from the input stream
X *
X * SYNOPSIS
X *    int byte(void);
X *
X * DESCRIPTION
X *    Byte return the next byte from the input stream, or EOF
X *    If the end of the outermost file is reached.
X *    It detechs the end of include files and closes them transparently.
X *
X * CAVEAT
X *    Lex_open must have been called previously.
X */
X
Xstatic int byte _((void));
X
Xstatic int
Xbyte()
X{
X    int        c;
X
X    trace(("byte()\n{\n"/*}*/));
X    for (;;)
X    {
X        assert(root);
X        c = fgetc(root->l_file);
X        if (c != EOF)
X            break;
X        if (ferror(root->l_file))
X            nfatal("%s", root->l_name->str_text);
X        if (!root->l_chain)
X            break;
X        lex_close();
X    }
X    if ((c < ' ' || c > '~') && c != EOF && !strchr("\t\n\f", c))
X    {
X        lex_error("illegal '\\%o' character", (unsigned char)c);
X        c = ' ';
X    }
X    if (mode != LM_DATA && root->l_bol && c == '#')
X        c = HASHLINE_ESCAPE;
X    if (c == '\n')
X    {
X        root->l_bol = 1;
X        root->l_line++;
X    }
X    else
X    {
X        if (!strchr(" \t\f", c))
X            root->l_bol = 0;
X    }
X    trace_short(root->l_bol);
X    trace(("return '%c';\n", c));
X    trace((/*{*/"}\n"));
X    return c;
X}
X
X
X/*
X * NAME
X *    byte_undo - push back a character
X *
X * SYNOPSIS
X *    void byte_undo(int c);
X *
X * Description
X *    Byte_undo pushes a byte back onto the input stream.
X *
X * CAVEAT
X *    Only one byte may be pushed back at any one time.
X */
X
Xstatic void byte_undo _((int));
X
Xstatic void
Xbyte_undo(c)
X    int        c;
X{
X    trace(("byte_undo(c = '%c')\n{\n"/*}*/, c));
X    assert(root);
X    switch (c)
X    {
X    case EOF:
X        break;
X
X    case '\n':
X        root->l_line--;
X    default:
X        ungetc(c, root->l_file);
X        break;
X    }
X    trace((/*{*/"}\n"));
X}
X
X
X/*
X * NAME
X *    sa_open - start accumulating a string.
X *
X * SYNOPSIS
X *    void sa_open(void);
X *
X * DESCRIPTION
X *    Sa_open begins accumulating a string for the lexical analyser.
X *    This allows virtually infinite length constructs within the
X *    lexical analyser.
X */
X
Xstatic void sa_open _((void));
X
Xstatic void
Xsa_open()
X{
X    trace(("sa_open()\n{\n"/*}*/));
X    assert(!saroot.sa_inuse);
X    saroot.sa_inuse = 1;
X    saroot.sa_len = 0;
X    trace((/*{*/"}\n"));
X}
X
X
X/*
X * NAME
X *    sa_char - add a character to the accumulating string
X *
X * SYNOPSIS
X *    void sa_char(int c);
X *
X * DESCRIPTION
X *    Sa_char adds a character to the accumulating string.
X *
X * CAVEAT
X *    Sa_open must have been called previously.
X */
X
Xstatic void sa_char _((int));
X
Xstatic void
Xsa_char(c)
X    int        c;
X{
X    trace(("sa_char(c = '%c')\n{\n"/*}*/, c));
X    assert(saroot.sa_inuse);
X    if (saroot.sa_len >= saroot.sa_max)
X    {
X        saroot.sa_max += 128;
X        if (!saroot.sa_buf)
X            saroot.sa_buf = (char *)mem_alloc(saroot.sa_max);
X        else
X            mem_change_size((char **)&saroot.sa_buf, saroot.sa_max);
X    }
X    saroot.sa_buf[saroot.sa_len++] = c;
X    trace((/*{*/"}\n"));
X}
X
X
X/*
X * NAME
X *    sa_close - finish accumulating a string
X *
X * SYNOPSIS
X *    string_ty *sa_close(void);
X *
X * DESCRIPTION
X *    Sa_close finished accumulating a string and
X *    returns a pointer to the string in dynamic memory.
X *
X * CAVEAT
X *    Sa_open must have been called previously.
X *
X *    The value returned by this function is allocated in dynamic memory.
X *    It is the responsibility of the caller to ensure that it is freed when
X *    finished with, by a call to str_free().
X */
X
Xstatic string_ty *sa_close _((void));
X
Xstatic string_ty *
Xsa_close()
X{
X    string_ty    *val;
X
X    trace(("sa_close()\n{\n"/*}*/));
X    assert(saroot.sa_inuse);
X    val = str_n_from_c(saroot.sa_buf, saroot.sa_len);
X    saroot.sa_inuse = 0;
X    trace(("return %08lX;\n", val));
X    trace((/*{*/"}\n"));
X    return val;
X}
X
X
X/*
X * NAME
X *    sa_mark - mark place when accumulating a string
X *
X * SYNOPSIS
X *    size_t sa_mark(void);
X *
X * DESACRIPTION
X *    Sa_mark returns an indicator as to where the string being accumulated
X *    is up to.
X *
X * CAVEAT
X *    Sa_open must have been called previously.
X *    Do not use the returned value for anything other than passing to
X *    sa_goto as an argument.
X */
X
Xstatic size_t sa_mark _((void));
X
Xstatic size_t
Xsa_mark()
X{
X    assert(saroot.sa_inuse);
X    return (saroot.sa_len);
X}
X
X
X/*
X * NAME
X *    sa_goto - shorten the accumulated string
X *
X * SYNOPSIS
X *    void sa_goto(size_t mark);
X *
X * DESACRIPTION
X *    Sa_goto shotens the accumulating string to a point
X *    previously determined by sa_mark.
X *
X * CAVEAT
X *    Sa_open must have been called previously.
X *    The mark argument must have previously been returned by sa_mark,
X *    and sa_close not called in the interim.
X */
X
Xstatic void sa_goto _((size_t));
X
Xstatic void
Xsa_goto(n)
X    size_t        n;
X{
X    assert(saroot.sa_inuse);
X    assert(n <= saroot.sa_len);
X    saroot.sa_len = n;
X}
X
X
X/*
X * NAME
X *    meta_repn - mata_ty representation
X *
X * SYNOPSIS
X *    char *meta_repn(meta_ty*);
X *
X * DESCRIPTION
X *    The meta_repn function is used to produce a readable representation of
X *    a mata_ty value.
X *
X * RETURNS
X *    char* - a pointer to ta C string.
X *
X * CAVEAT
X *    This function is only available when the DEBUG symbol is #define'd.
X */
X
X#ifdef DEBUG
X
Xstatic char *meta_repn _((meta_ty *));
X
Xstatic char *
Xmeta_repn(val)
X    meta_ty        *val;
X{
X    static char *type[] =
X    {
X        "0",
X        "NORMAL",
X        "SLOSHED",
X        "WHITE",
X    };
X    static char *flag[] =
X    {
X        "0",
X        "BEFORE",
X        "AFTER",
X        "AFTER | BEFORE",
X        "SINGLE",
X        "SINGLE | BEFORE",
X        "SINGLE | AFTER",
X        "SINGLE | AFTER | BEFORE",
X    };
X    static char    buffer[100];
X    char        buf2[20];
X    char        buf3[10];
X
X    if (val->m_type >= 0 && val->m_type < SIZEOF(type))
X        strcpy(buf2, type[val->m_type]);
X    else
X        sprintf(buf2, "%d", val->m_type);
X    switch (val->m_char)
X    {
X    default:
X        if (val->m_char >= ' ' && val->m_char <= '~')
X        {
X            buf3[0] = val->m_char;
X            buf3[1] = 0;
X        }
X        else
X            sprintf(buf3, "\\%03o", (unsigned char)val->m_char);
X        break;
X
X    case '\'':
X    case '\\':
X        buf3[0] = '\\';
X        buf3[1] = val->m_char;
X        buf3[2] = 0;
X        break;
X    }
X    sprintf
X    (
X        buffer,
X        "{m_char = '%s', m_type = %s, m_flag = %s}",
X        buf3,
X        buf2,
X        flag[val->m_flag]
X    );
X    return buffer;
X}
X
X#endif
X
X
X/*
X * NAME
X *    meta - fetch and classify a character
X *
X * SYNOPSIS
X *    void meta(meta_ty*);
X *
X * DESCRIPTION
X *    Meta fetches and classifies a character from the input stream.
X *    The classification may be 'mode' dependent.
X *
X *    This is the point at which escaped newlines and comments are replaced
X *    by a single space.
X *
X * CAVEAT
X *    Lex_open must have been called previously.
X */
X
Xstatic void meta _((meta_ty *));
X
Xstatic void
Xmeta(val)
X    meta_ty        *val;
X{
X    trace(("meta(val = %08lX)\n{\n"/*}*/, val));
X    assert(root);
X    if (root->l_mback.m_type)
X    {
X        *val = root->l_mback;
X        root->l_mback.m_type = 0;
X    }
X    else
X    {
X        switch (val->m_char = byte())
X        {
X        default:
X            val->m_type = NORMAL;
X            val->m_flag = BEFORE | AFTER;
X            break;
X
X        case EOF:
X            val->m_type = EOF;
X            val->m_flag = SINGLE;
X            break;
X
X        case '=':
X        case ';':
X        case ':':
X        case '{'/*}*/:
X        case /*{*/'}':
X            switch (mode)
X            {
X            default:
X                val->m_type = NORMAL;
X                val->m_flag = SINGLE;
X                break;
X
X            case LM_DATA:
X            case LM_SQUOTE:
X            case LM_DQUOTE:
X                val->m_type = NORMAL;
X                val->m_flag = BEFORE | AFTER;
X                break;
X            }
X            break;
X
X        case '['/*]*/:
X            switch (mode)
X            {
X            default:
X                val->m_flag = BEFORE | SINGLE;
X                break;
X
X            case LM_SQUOTE:
X            case LM_DQUOTE:
X                val->m_flag = BEFORE | AFTER;
X            }
X            val->m_type = NORMAL;
X                break;
X
X        case /*[*/']':
X            val->m_type = NORMAL;
X            switch (mode)
X            {
X            default:
X                val->m_flag = AFTER | SINGLE;
X                break;
X
X            case LM_DATA:
X            case LM_SQUOTE:
X            case LM_DQUOTE:
X                val->m_flag = BEFORE | AFTER;
X                break;
X            }
X            break;
X
X        case ' ':
X        case '\t':
X        case '\n':
X        case '\f':
X            switch (mode)
X            {
X            default:
X                val->m_type = WHITE;
X                val->m_flag = SINGLE;
X                break;
X
X            case LM_SQUOTE:
X            case LM_DQUOTE:
X            case LM_DATA:
X                val->m_type = NORMAL;
X                val->m_flag = BEFORE | AFTER;
X                break;
X            }
X            break;
X
X        case '\\':
X            switch (val->m_char = byte())
X            {
X            case EOF:
X                illeof();
X
X            case '\n':
X                val->m_char = ' ';
X                val->m_type = WHITE;
X                val->m_flag = SINGLE;
X                break;
X
X            case '0':
X            case '1':
X            case '2':
X            case '3':
X            case '4':
X            case '5':
X            case '6':
X            case '7':
X                {
X                    int     count;
X                    int     c;
X
X                    c = val->m_char;
X                    val->m_char = 0;
X                    for (count = 0; count < 3; count++)
X                    {
X                        val->m_char = val->m_char * 8 + c - '0';
X                        c = byte();
X                        if (c < '0' || c > '7')
X                        {
X                            byte_undo(c);
X                            break;
X                        }
X                    }
X                    val->m_type = SLOSHED;
X                    val->m_flag = BEFORE | AFTER;
X                }
X                break;
X
X            default:
X                {
X                    char    *cp;
X
X                    cp = strchr("b\bf\fn\nr\rt\t", val->m_char);
X                    if (cp)
X                        val->m_char = cp[1];
X                    val->m_type = SLOSHED;
X                    val->m_flag = BEFORE | AFTER;
X                }
X                break;
X            }
X            break;
X
X        case '/':
X            switch (mode)
X            {
X            default:
X                {
X                    int     c;
X                    int     gate;
X                    int     count;
X
X                    if ((c = byte()) != '*')
X                    {
X                        byte_undo(c);
X                        val->m_type = NORMAL;
X                        val->m_flag = BEFORE | AFTER;
X                        break;
X                    }
X                    gate = 0;
X                    count = 1;
X                    while (count)
X                    {
X                        switch (c = byte())
X                        {
X                        default:
X                        case '\n':
X                        case '\t':
X                        case '\f':
X                            gate = 0;
X                            break;
X
X                        case EOF:
X                            illeof();
X
X                        case '*':
X                            if (gate == 1)
X                            {
X                                /*
X                                 * nested comment start
X                                 *
X                                 * should a warning be issued?
X                                 */
X                                count++;
X                                gate = 0;
X                            }
X                            else
X                                gate = 2;
X                            break;
X
X                        case '/':
X                            if (gate == 2)
X                            {
X                                count--;
X                                gate = 0;
X                            }
X                            else
X                                gate = 1;
X                            break;
X                        }
X                    }
X                    val->m_char = ' ';
X                    val->m_type = WHITE;
X                    val->m_flag = SINGLE;
X                }
X                break;
X
X            case LM_DATA:
X            case LM_SQUOTE:
X            case LM_DQUOTE:
X                val->m_type = NORMAL;
X                val->m_flag = BEFORE | AFTER;
X                break;
X            }
X            break;
X        }
X    }
X    trace(("*val = %s;\n", meta_repn(val)));
X    trace((/*{*/"}\n"));
X}
X
X
X/*
X * NAME
X *    meta_undo - push back a character
X *
X * SYNOPSIS
X *    void meta_undo(meta_ty*);
X *
X * DESCRIPTION
X *    Meta_undo is used to temporarily push back a character
X *    from the input stream.
X *
X * CAVEAT
X *    Only one character may be pushed back at any one time.
X */
X
Xstatic void meta_undo _((meta_ty *));
X
Xstatic void
Xmeta_undo(val)
X    meta_ty        *val;
X{
X    assert(root);
X    assert(!root->l_mback.m_type);
X    root->l_mback = *val;
X}
X
X
X/*
X * NAME
X *    lex_error - print a file location specific error message
X *
X * SYNOPSIS
X *    void lex_error(char *s, ...);
X *
X * DESCRIPTION
X *    Lex_error prints a file location specific error message.
X *    If too many errors pass through here, cook will give up.
X */
X
X/*VARARGS1*/
Xvoid
Xlex_error(s sva_last)
X    char        *s;
X    sva_last_decl
X{
X    char        buffer[1024];
X    va_list        ap;
X
X    sva_init(ap, s);
X    assert(root);
X    vsprintf(buffer, s, ap);
X    va_end(ap);
X    error("%s: %d: %s", root->l_name->str_text, root->l_line, buffer);
X    if (++errcnt > 20)
X        fatal("too many errors");
X    option_set_errors();
X}
X
X
X/*
X * NAME
X *    lex_mode - change the mode of lexical analysis
X *
X * SYNOPSIS
X *    int lex_mode(int n);
X *
X * DESCRIPTION
X *    Lex_mode changes the mode of lexical analysis to the one given,
X *    and returns the previous mode.
X *
X * CAVEAT
X *    Use the #define's in lex.h.
X */
X
Xint
Xlex_mode(n)
X    int        n;
X{
X    int        old;
X
X    old = mode;
X    mode = n;
X    return (old);
X}
X
X
X/*
X * NAME
X *    lex_trace - debug output
X *
X * SYNOPSIS
X *    void lex_trace(char *s, ...);
X *
X * DESCRIPTION
X *    The lex_trace function is used to format and output yyparse's trace
X *    output.  The printf's in yyparse are #define'd into lex_trace calls.
X *    Unfortunately yacc's designer did not take trace output redirection
X *    into account, to this function is a little tedious.
X *
X * RETURNS
X *    void
X *
X * CAVEAT
X *    This function is only available when the DEBUG symbol is #define'd.
X */
X
X#ifdef DEBUG
X
X/*VARARGS1*/
Xvoid
Xlex_trace(s sva_last)
X    char        *s;
X    sva_last_decl
X{
X    va_list        ap;
X    static char    line[1024];
X    char        buffer[512];
X    char        *cp;
X
X    sva_init(ap, s);
X    vsprintf(buffer, s, ap);
X    va_end(ap);
X    strcat(line, buffer);
X    cp = line + strlen(line) - 1;
X    if (cp > line && *cp == '\n')
X    {
X        *cp = 0;
X        trace_printf
X        (
X            "%s: %d: %s\n",
X            root->l_name->str_text,
X            root->l_line,
X            line
X        );
X        line[0] = 0;
X    }
X}
X
X
Xstatic char *mode_repn _((int));
X
Xstatic char *
Xmode_repn(n)
X    int    n;
X{
X    static char *name[] =
X    {
X        "NORMAL",
X        "DATA",
X        "SQUOTE",
X        "DQUOTE",
X    };
X    static char buffer[12];
X
X    if (n >= 0 && n < SIZEOF(name))
X        return name[n];
X    sprintf(buffer, "%d", n);
X    return buffer;
X}
X
X#endif
X
X
X/*
X * NAME
X *    tokenize - lexical analyser
X *
X * SYNOPSIS
X *    int tokenize(void);
X *
X * DESCRIPTION
X *    The tokenize functionm is used to partition the input stream into
X *    discreet tokens.
X *
X * CAVEAT
X *    Lex_open must have been called previously.
X */
X
Xstatic int tokenize _((void));
X
Xstatic int
Xtokenize()
X{
X    meta_ty        c;
X    int        tok;
X    static meta_ty    last;
X    static int    dataended;
X
X    trace(("tokenize()\n{\n"/*}*/));
X    if (dataended)
X    {
X        dataended = 0;
X        tok = DATAEND;
X        goto ret;
X    }
X
X    if (!catted && (last.m_flag & AFTER))
X    {
X        /*
X         * For parts of words in expressions which are abutted
X         * together, the user is implying catenation of the strings.
X         * This implied zero length token happens here.
X         */
X        meta(&c);
X        meta_undo(&c);
X        if (c.m_flag & BEFORE)
X        {
X            catted = 1;
X            tok = CATENATE;
X            goto ret;
X        }
X    }
X    else
X        catted = 0;
X
X    for (;;)
X    {
X        int     mark;
X
X        mark = 0;
X        meta(&c);
X        if (c.m_char == HASHLINE_ESCAPE)
X        {
X            state = 0;
X            last.m_flag = 0;
X            hashline();
X            state = 0;
X            last.m_flag = 0;
X            continue;
X        }
X        switch (c.m_type)
X        {
X        default:
X            fatal("illegal m_type %d (bug %d)", c.m_type, __LINE__);
X
X        case EOF:
X            tok = 0; /* by definition of yacc */
X            goto ret;
X
X        case NORMAL:
X        case SLOSHED:
X            {
X                int     sloshed;
X
X                sloshed = 0;
X                sa_open();
X                if (state == 0)
X                    mark = sa_mark();
X                for (;;)
X                {
X                    trace
X                    ((
X                            "%s: %d: state %d, mode %s;\n",
X                        root->l_name->str_text,
X                        root->l_line,
X                        state,
X                        mode_repn(mode)
X                    ));
X                    sa_char(c.m_char);
X                    if (c.m_type == SLOSHED)
X                    {
X                        sloshed = 1;
X                        switch (state)
X                        {
X                        default:
X                            state = 1;
X                            break;
X
X                        case 11:
X                        case 12:
X                            /* don't change state */
X                            break;
X                        }
X                    }
X                    else
X                    {
X                        switch (c.m_char)
X                        {
X                        default:
X                            switch (state)
X                            {
X                            default:
X                                state = 1;
X
X                            case 11:
X                            case 12:
X                                break;
X                            }
X                            break;
X
X                        case '\n':
X                            switch (state)
X                            {
X                            case 9:
X                            case 10:
X                                sa_goto(mark);
X                                parse_lval.lv_word = sa_close();
X                                state = 0;
X                                last.m_flag = 0; /* don't CAT after this */
X                                dataended = DATAEND;
X                                tok = WORD;
X                                goto ret;
X
X                            case 11:
X                            case 12:
X                                /* don't change state */
X                                lex_error("newline in quote");
X                                break;
X
X                            default:
X                                state = 0;
X                                mark = sa_mark();
X                                break;
X                            }
X                            break;
X
X                        case '\'':
X                            if (state != 12)
X                            {
X                                static        int        oldmode = LM_SQUOTE;
X
X                                oldmode = lex_mode(oldmode);
X                                sa_goto(sa_mark()-1);
X                                state = ((state == 11) ? 1 : 11);
X                                sloshed = 1;
X                            }
X                            break;
X
X                        case '"':
X                            if (state != 11)
X                            {
X                                static        int        oldmode = LM_DQUOTE;
X
X                                oldmode = lex_mode(oldmode);
X                                sa_goto(sa_mark()-1);
X                                state = ((state == 12) ? 1 : 12);
X                                sloshed = 1;
X                            }
X                            break;
X
X                        case ' ':
X                        case '\t':
X                            switch (state)
X                            {
X                            default:
X                                state = 1;
X                                break;
X
X                            case 0:
X                            case 2:
X                                state = 2;
X                                break;
X
X                            case 9:
X                            case 10:
X                                state = 10;
X                                break;
X
X                            case 11:
X                            case 12:
X                                break;
X                            }
X                            break;
X
X                        case 'a':
X                            switch (state)
X                            {
X                            default:
X                                state = 1;
X                                break;
X
X                            case 3:
X                            case 5:
X                                state++;
X                                break;
X
X                            case 11:
X                            case 12:
X                                break;
X                            }
X                            break;
X
X                        case 'd':
X                            switch (state)
X                            {
X                            default:
X                                state = 1;
X                                break;
X
X                            case 0:
X                            case 2:
X                                state = 3;
X                                break;
X
X                            case 8:
X                                state = 9;
X                                break;
X
X                            case 11:
X                            case 12:
X                                break;
X                            }
X                            break;
X
X                        case 'e':
X                            switch (state)
X                            {
X                            default:
X                                state = 1;
X                                break;
X
X                            case 6:
X                                state = 7;
X                                break;
X
X                            case 11:
X                            case 12:
X                                break;
X                            }
X                            break;
X
X                        case 'n':
X                            switch (state)
X                            {
X                            default:
X                                state = 1;
X                                break;
X
X                            case 7:
X                                state = 8;
X                                break;
X
X                            case 11:
X                            case 12:
X                                break;
X                            }
X                            break;
X
X                        case 't':
X                            switch (state)
X                            {
X                            default:
X                                state = 1;
X                                break;
X
X                            case 4:
X                                state = 5;
X                                break;
X
X                            case 11:
X                            case 12:
X                                break;
X                            }
X                            break;
X                        }
X                    }
X                    last = c;
X                    if (last.m_flag & SINGLE)
X                        break;
X                    meta(&c);
X                    if (c.m_flag & SINGLE)
X                    {
X                        meta_undo(&c);
X                        break;
X                    }
X                }
X                parse_lval.lv_word = sa_close();
X                if (sloshed)
X                    tok = WORD;
X                else
X                    tok = UNQUOTED_WORD;
X            }
X            goto ret;
X
X        case WHITE:
X            if (c.m_char == '\n')
X            {
X                state = 0;
X                tok = EOLN;
X                goto ret;
X            }
X            state = 1;
X            break;
X        }
X    }
X
X    ret:
X    trace(("return %d;\n", tok));
X    trace((/*{*/"}\n"));
X    return tok;
X}
X
X
X/*
X * NAME
X *    lex_cur_file - name current file
X *
X * SYNOPSIS
X *    string_ty *lex_cur_file(void);
X *
X * DESCRIPTION
X *    The lex_cur_file function is used to get the name of the current
X *    file being analyzed by lex.
X *
X * RETURNS
X *    string_ty* - pointer to string with name in it
X *
X * CAVEAT
X *    Does not take a copy, so don't use str_free()
X */
X
Xstring_ty *
Xlex_cur_file()
X{
X    assert(root);
X    return root->l_name;
X}
X
Xint
Xlex_cur_line()
X{
X    assert(root);
X    return root->l_line;
X}
X
X
X/*
X * NAME
X *    parse_lex - lexer for parse.y
X *
X * SYNOPSIS
X *    int parse_lex(void);
X *
X * DESCRIPTION
X *    The parse_lex function is used to turn the tokens generated
X *    by tokenize into parse.y tokens.
X *
X * RETURNS
X *    int - the token number
X *
X * CAVEAT
X *    Intended solely for use by the yacc-generated compiler
X */
X
Xint
Xparse_lex()
X{
X    int        tok;
X
X    trace(("parse_lex()\n{\n"/*}*/));
X    for (;;)
X    {
X        tok = tokenize();
X        if (!passing)
X        {
X            if (!tok)
X            {
X                lex_error("unterminated conditional");
X                break;
X            }
X            if (tok == WORD || tok == UNQUOTED_WORD)
X                str_free(parse_lval.lv_word);
X            continue;
X        }
X        switch (tok)
X        {
X        case EOLN:
X            continue;
X
X        case UNQUOTED_WORD:
X            if (id_search(parse_lval.lv_word, ID_CLASS_PARSE_KEYWORD, &tok))
X            {
X                str_free(parse_lval.lv_word);
X                parse_lval.lv_word = 0;
X                if (tok == COLON)
X                {
X                    parse_lval.lv_position.pos_name = str_copy(root->l_name);
X                    parse_lval.lv_position.pos_line = root->l_line;
X                }
X                if (tok == DATA)
X                {
X                    int    winged;
X                    meta_ty    last;
X                    meta_ty    c;
X
X                    /*
X                     * This is a special.  Gobble the rest
X                     * of the line before he starts sucking
X                     * in the program data.
X                     */
X                    winged = 0;
X                    for (;;)
X                    {
X                        meta(&c);
X                        last = c;
X                        switch (c.m_type)
X                        {
X                        default:
X                            fatal("illegal m_type %d (bug %d)", c.m_type, __LINE__);
X
X                        case EOF:
X                            illeof();
X
X                        case NORMAL:
X                        case SLOSHED:
X                            if (!winged)
X                            {
X                                lex_error("the 'data' keyword must be the last on the line");
X                                winged = 1;
X                            }
X                            continue;
X
X                        case WHITE:
X                            if (c.m_char != '\n')
X                                continue;
X                            state = 0;
X                            break;
X                        }
X                        break;
X                    }
X                    catted = 1;
X                }
X            }
X            else
X                tok = WORD;
X            break;
X        }
X        break;
X    }
X    trace(("return %d;\n", tok));
X    trace((/*{*/"}\n"));
X    return tok;
X}
X
X
X/*
X * NAME
X *    hashline_lex - lexer for hashline.y
X *
X * SYNOPSIS
X *    int hashline_lex(void);
X *
X * DESCRIPTION
X *    The hashline_lex function is used to turn the tokens generated
X *    by tokenize into hashline.y tokens.
X *
X * RETURNS
X *    int - the token number
X *
X * CAVEAT
X *    Intended solely for use by the yacc-generated compiler
X */
X
Xint
Xhashline_lex()
X{
X    int        tok;
X
X    trace(("hashline_lex()\n{\n"/*}*/));
X    tok = tokenize();
X    switch (tok)
X    {
X    case EOLN:
X        tok = 0;
X        break;
X
X    case UNQUOTED_WORD:
X        if (id_search(parse_lval.lv_word, ID_CLASS_HASH_KEYWORD, &tok))
X        {
X            str_free(parse_lval.lv_word);
X            parse_lval.lv_word = 0;
X        }
X        else
X            tok = WORD;
X        break;
X    }
X    memcpy(&hashline_lval, &parse_lval, sizeof(hashline_lval));
X    trace(("return %d;\n", tok));
X    trace((/*{*/"}\n"));
X    return tok;
X}
X
X
Xvoid
Xlex_passing(n)
X    int        n;
X{
X    passing = n;
X}
END_OF_FILE
if test 26740 -ne `wc -c <'cook/lex.c'`; then
    echo shar: \"'cook/lex.c'\" unpacked with wrong size!
fi
# end of 'cook/lex.c'
fi
if test -f 'cook/os.c' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'cook/os.c'\"
else
echo shar: Extracting \"'cook/os.c'\" \(24336 characters\)
sed "s/^X//" >'cook/os.c' <<'END_OF_FILE'
X/*
X *    cook - file construction tool
X *    Copyright (C) 1991, 1992, 1993 Peter Miller.
X *    All rights reserved.
X *
X *    This program is free software; you can redistribute it and/or modify
X *    it under the terms of the GNU General Public License as published by
X *    the Free Software Foundation; either version 2 of the License, or
X *    (at your option) any later version.
X *
X *    This program is distributed in the hope that it will be useful,
X *    but WITHOUT ANY WARRANTY; without even the implied warranty of
X *    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
X *    GNU General Public License for more details.
X *
X *    You should have received a copy of the GNU General Public License
X *    along with this program; if not, write to the Free Software
X *    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
X *
X * MANIFEST: functions to isolate operating system interface
X */
X
X#include <sys/types.h>
X#include <sys/stat.h>
X#include <sys/times.h>
X#include <sys/param.h>
X
X#include <stddef.h>
X#include <string.h>
X#include <stdlib.h>
X#include <limits.h>
X#include <errno.h>
X#include <stdio.h>
X#include <signal.h>
X#include <unistd.h>
X#include <utime.h>
X
X#include <conf.h>
X#include <error.h>
X#include <id.h>
X#include <mem.h>
X#include <option.h>
X#include <os.h>
X#include <trace.h>
X#include <word.h>
X
X#ifdef BSD
X#include <sys/time.h>
X#include <sys/resource.h>
X#endif
X
X
X/*
X * get rid if this real soon
X */
X#ifndef PATH_MAX
X# define PATH_MAX 1024
X#endif
X#ifndef NAME_MAX
X# ifdef BSD
X#  define NAME_MAX 255
X# else
X#  define NAME_MAX 14
X# endif
X#endif
X
X
X/*
X * NAME
X *    stat_cache - stat() with caching
X *
X * SYNOPSIS
X *    int stat_cache(string_ty *path, struct stat *result);
X *
X * DESCRIPTION
X *    The stat_cache function is used to perform the same as the stat()
X *    system function, but the results are cached to avoid too many probes
X *    into the file system.  Files which do not exist are indicated by
X *    filling the result structure with zeros.
X *
X * RETURNS
X *    int; -1 on error, 0 on success
X *
X * CAVEAT
X *    Errors, other than ENOENT, result in a fatal diagnostic.
X */
X
Xstatic int stat_cache _((string_ty *, struct stat *));
X
Xstatic int
Xstat_cache(path, result)
X    string_ty    *path;
X    struct stat    *result;
X{
X    if (id_search(path, ID_CLASS_STAT, result))
X        return 0;
X    if (stat(path->str_text, result))
X    {
X        switch (errno)
X        {
X        case ENOENT:
X        case ENOTDIR:
X            /*
X             * ENOENT occurs when a path element does not exist
X             * ENOTDIR occurs when a path element (except the last)
X             *        is not a directory.
X             * Either way, the file being "stat"ed does not exist.
X             */
X            break;
X
X        default:
X            nerror("stat(\"%s\")", path->str_text);
X            option_set_errors();
X            return -1;
X        }
X        memset(result, 0, sizeof(*result));
X    }
X    else
X    {
X        if (result->st_mtime < 1)
X            result->st_mtime = 1;
X    }
X    id_assign(path, ID_CLASS_STAT, result);
X    if (option_test(OPTION_TRACE))
X    {
X        if (!result->st_mtime)
X        {
X            error
X            (
X                "mtime(\"%s\") == ENOENT (trace)",
X                path->str_text
X            );
X        }
X        else
X        {
X            struct tm    *tm;
X
X            tm = localtime(&result->st_mtime);
X            error
X            (
X            "mtime(\"%s\") == %4d/%02d/%02d.%02d:%02d:%02d (trace)",
X                path->str_text,
X                1900 + tm->tm_year,
X                tm->tm_mon + 1,
X                tm->tm_mday,
X                tm->tm_hour,
X                tm->tm_min,
X                tm->tm_sec
X            );
X        }
X    }
X    return 0;
X}
X
X
X/*
X * NAME
X *    os_mtime - return the last-modified time of a file
X *
X * SYNOPSIS
X *    time_t os_mtime(string_ty *path);
X *
X * DESCRIPTION
X *    Os_mtime returns the time the named file was last modified.
X *    It returns -1L if the file does not exist.
X *
X * CAVEAT
X *    Assumes time will be the UNIX format.
X */
X
Xtime_t
Xos_mtime(path)
X    string_ty    *path;
X{
X    struct stat    buf;
X
X    if (stat_cache(path, &buf))
X        return -1;
X    return buf.st_mtime;
X}
X
X
X
X/*
X * NAME
X *    os_mtime_adjust - indicate change
X *
X * SYNOPSIS
X *    int os_mtime_adjust(string_ty *path);
X *
X * DESCRIPTION
X *    The os_mtime_adjust function is used to adjust the value in the stat
X *    cache to indicate that a recipe has constructed a file, and thus
X *    changed it last-modified time.  No change to the actual file system
X *    occurs.
X *
X * RETURNS
X *    int; -1 on error, 0 on success
X */
X
Xint
Xos_mtime_adjust(path)
X    string_ty    *path;
X{
X    struct stat    buf;
X    struct tm    *tm;
X
X    if (stat_cache(path, &buf))
X        return -1;
X    time(&buf.st_mtime);
X    if (buf.st_mtime < 1)
X        buf.st_mtime = 1;
X    id_assign(path, ID_CLASS_STAT, &buf);
X    if (option_test(OPTION_TRACE))
X    {
X        tm = localtime(&buf.st_mtime);
X        error
X        (
X            "mtime(\"%s\") = %4d/%02d/%02d.%02d:%02d:%02d (trace)",
X            path->str_text,
X            1900 + tm->tm_year,
X            tm->tm_mon + 1,
X            tm->tm_mday,
X            tm->tm_hour,
X            tm->tm_min,
X            tm->tm_sec
X        );
X    }
X    return 0;
X}
X
X
X/*
X * NAME
X *    os_clear_stat - invalidate cache
X *
X * SYNOPSIS
X *    int os_clear_stat(string_ty *path);
X *
X * DESCRIPTION
X *    The os_clear_stat function is used to invalidate the the stat
X *    cache to indicate that a recipe has constructed a file, and thus
X *    changed it last-modified time.  No change to the actual file system
X *    occurs.
X *
X * RETURNS
X *    int; 0 on success, -1 on error
X *
X * CAVEAT
X *    This is used in situations where the recipe changes a file not named
X *    in the targets of the recipe.  This usually occurs around mkdir, rm
X *    and mv commands, used in conjunction with the [exists] builtin function.
X */
X
Xint
Xos_clear_stat(path)
X    string_ty    *path;
X{
X    id_delete(path, ID_CLASS_STAT);
X    return 0;
X}
X
X
X/*
X * NAME
X *    os_touch - update the modify time of the file
X *
X * SYNOPSIS
X *    int os_touch(string_ty *path);
X *
X * DESCRIPTION
X *    Os_touch updates the last-modified time of the file to the present.
X *    If the named file does not exist, then nothing is done.
X *
X * RETURNS
X *    int; 0 on success, -1 on error
X */
X
Xint
Xos_touch(path)
X    string_ty    *path;
X{
X    struct stat    buf;
X    struct utimbuf    ut;
X
X    if (stat_cache(path, &buf))
X        return -1;
X    if (!buf.st_ino)
X        /* file does not exist */
X        return 0;
X    time(&ut.modtime);
X    if (ut.modtime < 0)
X        ut.modtime = 0;
X    ut.actime = buf.st_atime;
X    if (utime(path->str_text, &ut))
X    {
X        nerror("utime(\"%s\")", path->str_text);
X        option_set_errors();
X        return -1;
X    }
X    buf.st_mtime = ut.modtime;
X    id_assign(path, ID_CLASS_STAT, &buf);
X    return 0;
X}
X
X
X/*
X * NAME
X *    os_delete - delete a file
X *
X * SYNOPSIS
X *    int os_delete(string_ty *path);
X *
X * DESCRIPTION
X *    Os_delete deletes the named file.
X *    If it does not exist, no error is given.
X *
X * RETURNS
X *    int; -1 on error, 0 on success
X */
X
Xint
Xos_delete(path)
X    string_ty    *path;
X{
X    struct stat    buf;
X
X    if (unlink(path->str_text) && errno != ENOENT)
X    {
X        nerror("unlink(\"%s\")", path->str_text);
X        option_set_errors();
X        return -1;
X    }
X
X    /*
X     * if the knew about the existence of the file before we deleted
X     * it, then we will have to adjust the stat cache.
X     */
X    if (stat_cache(path, &buf))
X        return -1;
X    if (buf.st_ino)
X    {
X        memset(&buf, 0, sizeof(buf));
X        id_assign(path, ID_CLASS_STAT, &buf);
X    }
X    return 0;
X}
X
X
X/*
X * NAME
X *    signal_name - find it
X *
X * SYNOPSIS
X *    char *signal_name(int n);
X *
X * DESCRIPTION
X *    The signal_name function is used to find the name of a signal from its
X *    number.
X *
X * RETURNS
X *    char *: pointer to the signal name.
X *
X * CAVEAT
X *    The signal name may not be written on.  Subsequent calls may alter the
X *    area pointed to.
X */
X
Xchar *
Xsignal_name(n)
X    int        n;
X{
X    static char    buffer[16];
X
X    switch (n)
X    {
X#ifdef SIGHUP
X    case SIGHUP:
X        return "hang up [SIGHUP]";
X#endif /* SIGHUP */
X
X#ifdef SIGINT
X    case SIGINT:
X        return "user interrupt [SIGINT]";
X#endif /* SIGINT */
X
X#ifdef SIGQUIT
X    case SIGQUIT:
X        return "user quit [SIGQUIT]";
X#endif /* SIGQUIT */
X
X#ifdef SIGILL
X    case SIGILL:
X        return "illegal instruction [SIGILL]";
X#endif /* SIGILL */
X
X#ifdef SIGTRAP
X    case SIGTRAP:
X        return "trace trap [SIGTRAP]";
X#endif /* SIGTRAP */
X
X#ifdef SIGIOT
X    case SIGIOT:
X        return "abort [SIGIOT]";
X#endif /* SIGIOT */
X
X#ifdef SIGEMT
X    case SIGEMT:
X        return "EMT instruction [SIGEMT]";
X#endif /* SIGEMT */
X
X#ifdef SIGFPE
X    case SIGFPE:
X        return "floating point exception [SIGFPE]";
X#endif /* SIGFPE */
X
X#ifdef SIGKILL
X    case SIGKILL:
X        return "kill [SIGKILL]";
X#endif /* SIGKILL */
X
X#ifdef SIGBUS
X    case SIGBUS:
X        return "bus error [SIGBUS]";
X#endif /* SIGBUS */
X
X#ifdef SIGSEGV
X    case SIGSEGV:
X        return "segmentation violation [SIGSEGV]";
X#endif /* SIGSEGV */
X
X#ifdef SIGSYS
X    case SIGSYS:
X        return "bad argument to system call [SIGSYS]";
X#endif /* SIGSYS */
X
X#ifdef SIGPIPE
X    case SIGPIPE:
X        return "write on a pipe with no one to read it [SIGPIPE]";
X#endif /* SIGPIPE */
X
X#ifdef SIGALRM
X    case SIGALRM:
X        return "alarm clock [SIGALRM]";
X#endif /* SIGALRM */
X
X#ifdef SIGTERM
X    case SIGTERM:
X        return "software termination [SIGTERM]";
X#endif /* SIGTERM */
X
X#ifdef SIGUSR1
X    case SIGUSR1:
X        return "user defined signal one [SIGUSR1]";
X#endif /* SIGUSR1 */
X
X#ifdef SIGUSR2
X    case SIGUSR2:
X        return "user defined signal two [SIGUSR2]";
X#endif /* SIGUSR2 */
X
X#ifdef SIGCLD
X    case SIGCLD:
X        return "death of child [SIGCLD]";
X#endif /* SIGCLD */
X
X#ifdef SIGPWR
X    case SIGPWR:
X        return "power failure [SIGPWR]";
X#endif /* SIGPWR */
X
X    default:
X        sprintf(buffer, "signal %d", n);
X        return buffer;
X    }
X}
X
X
X/*
X * NAME
X *    exit_status - pretty print
X *
X * SYNOPSIS
X *    int exit_status(char *cmd, int status);
X *
X * DESCRIPTION
X *    The exit_status function is used to pretty print the meaning of the
X *    exit status of the given command.  No output is generated for normal
X *    (0) termination.
X *
X * RETURNS
X *    int: zero if the command succeeded, 1 if it failed.
X *
X * CAVEAT
X *    This function should be static, but func_collect (builtin.c) uses it.
X */
X
Xint
Xexit_status(cmd, status)
X    char        *cmd;
X    int        status;
X{
X    int        a, b, c;
X
X    a = (status >> 8) & 0xFF;
X    b = (status >> 7) & 1;
X    c = status & 0x7F;
X    switch (c)
X    {
X    case 0x7F:
X        /*
X         * process was stopped,
X         * since we didn't do it, treat it as an error
X         */
X        error("%s: stopped", cmd);
X        return 1;
X
X    case 0:
X        /* normal termination */
X        if (a)
X        {
X            error("%s: exit status: %d", cmd, a);
X            return 1;
X        }
X        return 0;
X
X    default:
X        /*
X         * process dies from unhandled condition
X         */
X        error
X        (
X            "%s: terminated by %s%s",
X            cmd,
X            signal_name(c),
X            (b ? " (core dumped)" : "")
X        );
X        return 1;
X    }
X}
X
X
X/*
X * NAME
X *    execute - do a command
X *
X * SYNOPSIS
X *    int execute(wlist *cmd, int fd);
X *
X * DESCRIPTION
X *    The execute function is used to execute the command in the word list.
X *    If the file descriptor is >= 0, it indicates a file to use as stdin to
X *    the command.
X *
X * RETURNS
X *    int: zero if the commands succeeds, nonzero if it fails.
X *
X * CAVEAT
X */
X
Xstatic int execute _((wlist *, int));
X
Xstatic int
Xexecute(cmd, fd)
X    wlist        *cmd;
X    int        fd;
X{
X    int        child;
X    int        pid;
X    int        status;
X    static char    **argv;
X    static size_t    argvlen;
X    int        j;
X
X    if (!argv)
X    {
X        argvlen = cmd->wl_nwords + 1;
X        argv = (char **)mem_alloc(argvlen * sizeof(char*));
X    }
X    else
X    {
X        if (argvlen < cmd->wl_nwords + 1)
X        {
X            argvlen = cmd->wl_nwords + 1;
X            mem_change_size((char **)&argv, argvlen * sizeof(char*));
X        }
X    }
X    for (j = 0; j < cmd->wl_nwords; ++j)
X        argv[j] = cmd->wl_word[j]->str_text;
X    argv[cmd->wl_nwords] = 0;
X    switch (child = fork())
X    {
X    case -1:
X        nerror("fork()");
X        return -1;
X
X    case 0:
X        if (fd >= 0)
X        {
X            if (close(0) && errno != EBADF)
X                nfatal("close(0)");
X            if (dup(fd) < 0)
X                nfatal("dup()");
X        }
X        if (argv[0][0] == '/')
X            execv(argv[0], argv);
X        else
X            execvp(argv[0], argv);
X        nfatal("exec(\"%s\")", argv[0]);
X
X    default:
X        for (;;)
X        {
X            pid = wait(&status);
X            if (pid == child)
X                return exit_status(argv[0], status);
X            if (pid < 0 && errno != EINTR)
X            {
X                nerror("wait()");
X                option_set_errors();
X                return -1;
X            }
X        }
X    }
X}
X
X
X/*
X * NAME
X *    os_execute - execute a command
X *
X * SYNOPSIS
X *    int os_execute(wlist *args, string_ty *input);
X *
X * DESCRIPTION
X *    Os_execute performs the given command.
X *    If the command succeeds 0 is returned.
X *    If the command fails a diagnostic message is given
X *    and 1 is returned.
X */
X
Xint
Xos_execute(args, input)
X    wlist        *args;
X    string_ty    *input;
X{
X    int        j;
X    FILE        *fp;
X    char        iname[L_tmpnam];
X    int        retval;
X
X    assert(args);
X    assert(args->wl_nwords > 0);
X
X    fp = 0;
X    if (input)
X    {
X        /*
X         * He has given a string to be used as input to the command,
X         * so write it out to a file, and then redirect the input.
X         */
X        tmpnam(iname);
X        fp = fopen(iname, "w");
X        if (!fp)
X        {
X            nerror("create %s", iname);
X            exec_fails:
X            option_set_errors();
X            retval = -1;
X            goto ret;
X        }
X        if (unlink(iname))
X        {
X            nerror("unlink(\"%s\")", iname);
X            goto exec_fails;
X        }
X        fputs(input->str_text, fp);
X        if (ferror(fp) || fseek(fp, 0L, 0))
X        {
X            nerror("write %s", iname);
X            goto exec_fails;
X        }
X    }
X
X    for (j = 1; j < args->wl_nwords; j++)
X    {
X        char    *s;
X
X        s = args->wl_word[j]->str_text;
X        while (*s)
X        {
X            if (strchr("#|=^();&<>*?[]:$`'\"\\\n", *s))
X            {
X                string_ty    *str;
X                wlist        newcmd;
X                char        *cp;
X
X                cp = getenv("SHELL");
X                if (!cp || !*cp)
X                    cp = CONF_SHELL;
X                wl_zero(&newcmd);
X                str = str_from_c(cp);
X                wl_append(&newcmd, str);
X                str_free(str);
X                if (option_test(OPTION_ERROK))
X                    str = str_from_c("-c");
X                else
X                    str = str_from_c("-ce");
X                wl_append(&newcmd, str);
X                str_free(str);
X                str = wl2str(args, 0, 32767);
X                wl_append(&newcmd, str);
X                str_free(str);
X                retval = execute(&newcmd, input ? fileno(fp) : -1);
X                wl_free(&newcmd);
X                if (input)
X                    fclose(fp);
X                return retval;
X            }
X            ++s;
X        }
X    }
X    retval = execute(args, input ? fileno(fp) : -1);
X    if (input)
X        fclose(fp);
Xret:
X    return retval;
X}
X
X
X/*
X * NAME
X *    os_exists - tests for the existence of a file
X *
X * SYNOPSIS
X *    int os_exists(string_ty *path);
X *
X * DESCRIPTION
X *    The os_exists function is used to determine the existence of a file.
X *
X * RETURNS
X *    int; 1 if the file exists, 0 if it does not.  -1 on error
X */
X
Xint
Xos_exists(path)
X    string_ty    *path;
X{
X    struct stat    buf;
X
X    if (stat_cache(path, &buf))
X        return -1;
X    return (buf.st_ino != 0);
X}
X
X
X/*
X * NAME
X *    os_accdir - return the directory path of the users account
X *
X * SYNOPSIS
X *    string_ty *os_accdir(void);
X *
X * DESCRIPTION
X *    The full pathname of the user's account is returned.
X *    The string will have been dynamically allocated.
X *
X * RETURNS
X *    A pointer to a string in dynamic memory is returned.
X *    A null pointer is returned on error.
X *
X * CAVEAT
X *    Use str_free() when you are done with the value returned.
X */
X
Xstring_ty *
Xos_accdir()
X{
X    static char    home[] = "HOME";
X    static string_ty    *s;
X
X    if (!s)
X    {
X        char        *cp;
X
X        cp = getenv(home);
X        if (!cp)
X        {
X            error("%s: environment variable not defined", home);
X            option_set_errors();
X            return 0;
X        }
X        s = str_from_c(cp);
X    }
X    return str_copy(s);
X}
X
X
X/*
X * NAME
X *    os_curdir - full current directory path
X *
X * SYNOPSIS
X *    string_ty *os_curdir(void);
X *
X * DESCRIPTION
X *    Os_curdir is used to determine the full pathname
X *    of the current directory.
X *
X * RETURNS
X *    A pointer to a string in dynamic memory is returned.
X *    A null pointer is returned on error.
X *
X * CAVEAT
X *    Use str_free() when you are done with the value returned.
X */
X
Xstring_ty *
Xos_curdir()
X{
X    static string_ty    *s;
X
X    if (!s)
X    {
X        char        buffer[PATH_MAX + 1];
X
X        if (!getcwd(buffer, sizeof(buffer)))
X        {
X            nerror("getcwd");
X            option_set_errors();
X            return 0;
X        }
X        s = str_from_c(buffer);
X    }
X    return str_copy(s);
X}
X
X
X/*
X * NAME
X *    os_pathname - determine full file name
X *
X * SYNOPSIS
X *    string_ty *os_pathname(string_ty *path);
X *
X * DESCRIPTION
X *    Os_pathname is used to determine the full path name
X *    of a partial path given.
X *
X * RETURNS
X *    pointer to dynamically allocated string.
X *
X * CAVEAT
X *    Use str_free() when you are done with the value returned.
X */
X
Xstring_ty *
Xos_pathname(path)
X    string_ty    *path;
X{
X    static char    *tmp;
X    static size_t    tmplen;
X    static size_t    ipos;
X    static size_t    opos;
X    int        c;
X    int        found;
X#ifdef S_IFLNK
X    char        link[2000];
X    int        nbytes;
X    wlist        loop;
X    string_ty    *s;
X#endif
X
X    /*
X     * Change relative pathnames to absolute
X     */
X    trace(("os_pathname(path = %08lX)\n{\n"/*}*/, path));
X    trace_string(path->str_text);
X    if (path->str_text[0] != '/')
X    {
X        string_ty    *cwd;
X
X        cwd = os_curdir();
X        assert(cwd);
X        path = str_format("%S/%S", cwd, path);
X        str_free(cwd);
X    }
X    else
X        path = str_copy(path);
X    if (!tmp)
X    {
X        tmplen = 200;
X        tmp = mem_alloc(tmplen);
X    }
X
X    /*
X     * Take kinks out of the pathname
X     */
X    ipos = 0;
X    opos = 0;
X    found = 0;
X#ifdef S_IFLNK
X    wl_zero(&loop);
X#endif
X    while (!found)
X    {
X        /*
X         * get the next character
X         */
X        c = path->str_text[ipos];
X        if (c)
X            ipos++;
X        else
X        {
X            found = 1;
X            c = '/';
X        }
X
X        /*
X         * remember the normal characters
X         * until get to slash
X         */
X        if (c != '/')
X            goto remember;
X
X        /*
X         * leave root alone
X         */
X        if (!opos)
X            goto remember;
X
X        /*
X         * "/.." -> "/"
X         */
X        if (opos == 3 && tmp[1] == '.' && tmp[2] == '.')
X        {
X            opos = 1;
X            continue;
X        }
X
X        /*
X         * "a//" -> "a/"
X         */
X        if (tmp[opos - 1] == '/')
X            continue;
X
X        /*
X         * "a/./" -> "a/"
X         */
X        if (opos >= 2 && tmp[opos - 1] == '.' && tmp[opos - 2] == '/')
X        {
X            opos--;
X            continue;
X        }
X
X        /*
X         * "a/b/../" -> "a/"
X         */
X        if
X        (
X            opos > 3
X        &&
X            tmp[opos - 1] == '.'
X        &&
X            tmp[opos - 2] == '.'
X        &&
X            tmp[opos - 3] == '/'
X        )
X        {
X            opos -= 4;
X            assert(opos > 0);
X            while (tmp[opos - 1] != '/')
X                opos--;
X            continue;
X        }
X
X        /*
X         * see if the path so far is a symbolic link
X         */
X#ifdef S_IFLNK
X        s = str_n_from_c(tmp, opos);
X        if (wl_member(&loop, s))
X        {
X            fatal
X            (
X                "symbolic link loop \"%s\" detected",
X                s->str_text
X            );
X        }
X        nbytes = readlink(s->str_text, link, sizeof(link) - 1);
X        if (nbytes < 0)
X        {
X            /*
X             * probably not a symbolic link
X             */
X            if (errno != EINVAL && errno != ENOENT)
X                nfatal("readlink(\"%s\")", s->str_text);
X            not_a_symlink:
X            str_free(s);
X        }
X        else
X        {
X            string_ty    *newpath;
X
X            if (nbytes == 0)
X            {
X                fatal
X                (
X                    "readlink(\"%s\") returned \"\"",
X                    s->str_text
X                );
X            }
X            link[nbytes] = 0;
X
X            /*
X             * ignore auto-mounter temporary mount links,
X             * they will change with each mount.
X             */
X            if (!strncmp(link, "/tmp_mnt/", 9))
X                goto not_a_symlink;
X
X            wl_append(&loop, s);
X            str_free(s);
X            if (link[0] == '/')
X                tmp[1] = 0;
X            else
X            {
X                while (tmp[opos - 1] != '/')
X                    opos--;
X                tmp[opos] = 0;
X            }
X            newpath =
X                str_format
X                (
X                    "%s/%s/%s",
X                    tmp,
X                    link,
X                    path->str_text + ipos
X                );
X            str_free(path);
X            path = newpath;
X            ipos = 0;
X            opos = 0;
X            found = 0;
X            continue;
X        }
X#endif
X
X        /*
X         * keep the slash
X         */
X        remember:
X        if (opos >= tmplen)
X        {
X            tmplen += 100;
X            mem_change_size(&tmp, tmplen);
X        }
X        tmp[opos++] = c;
X    }
X#ifdef S_IFLNK
X    wl_free(&loop);
X#endif
X    str_free(path);
X    assert(opos >= 1);
X    assert(tmp[0] == '/');
X    assert(tmp[opos - 1] == '/');
X    if (opos >= 2)
X        opos--;
X    path = str_n_from_c(tmp, opos);
X    trace_string(path->str_text);
X    trace((/*{*/"}\n"));
X    return path;
X}
X
X
X/*
X * NAME
X *    os_entryname - take path apart
X *
X * SYNOPSIS
X *    string_ty *os_entryname(string_ty *path);
X *
X * DESCRIPTION
X *    Os_entryname is used to extract the entry part
X *    from a pathname.
X *
X * RETURNS
X *    pointer to dynamically allocated string.
X *
X * CAVEAT
X *    Use str_free() when you are done with the return value.
X */
X
Xstring_ty *
Xos_entryname(path)
X    string_ty    *path;
X{
X    char        *cp;
X
X    trace(("os_entryname(path = %08lX) entry", path));
X    trace_string(path->str_text);
X    cp = strrchr(path->str_text, '/');
X    if (cp)
X        path = str_from_c(cp + 1);
X    else
X        path = str_copy(path);
X    trace_string(path->str_text);
X    trace(("return %08lX;\n", path));
X    trace((/*{*/"}\n"));
X    return path;
X}
X
X
X/*
X * NAME
X *    os_dirname - take path apart
X *
X * SYNOPSIS
X *    string_ty *os_dirname(string_ty *path);
X *
X * DESCRIPTION
X *    Os_dirname is used to extract the directory part
X *    of a pathname.
X *
X * RETURNS
X *    pointer to dynamically allocated string.
X *    A null pointer is returned on error.
X *
X * CAVEAT
X *    Use str_free() when you are done with the value returned.
X */
X
Xstring_ty *
Xos_dirname(path)
X    string_ty    *path;
X{
X    char        *cp;
X
X    trace(("os_dirname(path = %08lX)\n{\n"/*}*/, path));
X    trace_string(path->str_text);
X    cp = strrchr(path->str_text, '/');
X    if (cp)
X    {
X        if (cp > path->str_text)
X            path = str_n_from_c(path->str_text, cp - path->str_text);
X        else
X            path = str_from_c("/");
X    }
X    else
X        path = os_curdir();
X    trace_string(path->str_text);
X    trace(("return %08lX;\n", path));
X    trace((/*{*/"}\n"));
X    return path;
X}
X
X
X/*
X * NAME
X *    os_meter_grab - get metering snapshot
X *
X * SYNOPSIS
X *    void os_meter_grab(grab*);
X *
X * DESCRIPTION
X *    The os_meter_gram function is used to take a snapshot of metering
X *    information.
X *
X * RETURNS
X *    void
X */
X
Xtypedef struct grab grab;
Xstruct grab
X{
X    double    g_elapsed;
X    double    g_cpu;
X    double    g_io;
X};
X
Xstatic void os_meter_grab _((grab *));
X
Xstatic void
Xos_meter_grab(gp)
X    grab        *gp;
X{
X#ifdef BSD
X    struct rusage    ru;
X    struct timeval    tv;
X    struct timezone    tz;
X
X    int getrusage _((int, struct rusage *));
X    int gettimeofday _((struct timeval *, struct timezone *));
X
X    if (getrusage(RUSAGE_CHILDREN, &ru))
X        nfatal("getrusage");
X    if (gettimeofday(&tv, &tz))
X        nfatal("gettimeofday");
X    gp->g_cpu = ru.ru_utime.tv_sec + ru.ru_utime.tv_usec * 1.0e-6;
X    gp->g_io = ru.ru_stime.tv_sec + ru.ru_stime.tv_usec * 1.0e-6;
X    gp->g_elapsed = tv.tv_sec + tv.tv_usec * 1.0e-6;
X#else
X    struct tms    buffer;
X    time_t        n;
X
X    n = times(&buffer);
X    gp->g_elapsed = n / (double)HZ;
X    gp->g_cpu = buffer.tms_cutime / (double)HZ;
X    gp->g_io = buffer.tms_cstime / (double)HZ;
X#endif
X}
X
X
X/*
X * NAME
X *    os_meter_ptime - print timing info
X *
X * SYNOPSIS
X *    void os_meter_ptime(double t, char *s, double elapsed);
X *
X * DESCRIPTION
X *    The os_meter_ptime function is used to print e representation of the
X *    time, in seconds, given in the `t' argument.  If `elapsed' is >0, it is
X *    the elapsed time taken, for percentage figures.  The `s' argument is a
X *    title string.
X *
X * RETURNS
X *    void
X */
X
Xstatic void os_meter_ptime _((double, char *, double));
X
Xstatic void
Xos_meter_ptime(t,s,e)
X    double    t;
X    char    *s;
X    double    e;
X{
X    char    buffer[32];
X    char    temp[32];
X    long    hour, min, sec, frac;
X
X    frac = t * 1000 + 0.5;
X    sec = frac / 1000;
X    frac %= 1000;
X    min = sec / 60;
X    sec %= 60;
X    hour = min / 60;
X    min %= 60;
X    if (e > 0.0)
X    {
X        sprintf(temp, "(%.2f%%)", 100. * t / e);
X        sprintf(buffer, "%-4s%9s", s, temp);
X        s = buffer;
X    }
X    fprintf(stderr, "%2ld:%02ld:%02ld.%03ld %s\n", hour, min, sec, frac, s);
X}
X
X
X/*
X * NAME
X *    os_meter_begin - start metering interval
X *
X * SYNOPSIS
X *    void os_meter_begin(void);
X *
X * DESCRIPTION
X *    The os_meter_begin function is used to start a metring interval.
X *
X * RETURNS
X *    void
X */
X
Xstatic    grab    os_meter_start;
X
Xvoid
Xos_meter_begin()
X{
X    os_meter_grab(&os_meter_start);
X}
X
X
X/*
X * NAME
X *    os_meter_end - end a metering interval
X *
X * SYNOPSIS
X *    void os_meter_end(void);
X *
X * DESCRIPTION
X *    The os_meter_end function is used to end a metering interval and print
X *    the metered information.
X *
X * RETURNS
X *    void
X */
X
Xvoid
Xos_meter_end()
X{
X    grab    end;
X    double    elapsed;
X    double    cpu;
X    double    io;
X
X    os_meter_grab(&end);
X
X    elapsed = end.g_elapsed - os_meter_start.g_elapsed;
X    os_meter_ptime(elapsed, "elapsed", 0.0);
X    cpu = end.g_cpu - os_meter_start.g_cpu;
X    os_meter_ptime(cpu, "usr", elapsed);
X    io = end.g_io - os_meter_start.g_io;
X    os_meter_ptime(io, "sys", elapsed);
X}
X
X
X/*
X * NAME
X *    os_legal_path - test if path is legal
X *
X * SYNOPSIS
X *    int os_legal_path(string_ty *path);
X *
X * DESCRIPTION
X *    The os_legal_path function is used to test if each of the components of
X *    the given path are legal to the underlying operating system.
X *
X * RETURNS
X *    int: zero if it is an illegal path, nonzero it is a legal path.
X */
X
Xint
Xos_legal_path(str)
X    string_ty    *str;
X{
X    char        *s;
X    char        *ep;
X
X    if (str->str_length < 1 || str->str_length > PATH_MAX)
X        return 0;
X    s = str->str_text;
X    for (;;)
X    {
X        ep = strchr(s, '/');
X        if (!ep)
X            return (strlen(s) <= NAME_MAX);
X        if (ep - s > NAME_MAX)
X            return 0;
X        s = ep + 1;
X    }
X}
X
X
X#ifdef TIMING
X
Xstatic long os_totals_baseline;
X
Xvoid
Xos_totals_start()
X{
X    struct tms    buffer;
X
X    os_totals_baseline = times(&buffer);
X}
X
Xvoid
Xos_totals()
X{
X    struct tms    buffer;
X    time_t        n;
X    double        elapsed;
X    double        t;
X
X    error("timing totals...");
X    n = times(&buffer);
X    elapsed = (n - os_totals_baseline) / (double)HZ;
X    os_meter_ptime(elapsed, "elapsed", 0.0);
X    t = buffer.tms_utime / (double)HZ;
X    os_meter_ptime(t, "usr", elapsed);
X    t = buffer.tms_stime / (double)HZ;
X    os_meter_ptime(t, "sys", elapsed);
X    t = buffer.tms_cutime / (double)HZ;
X    os_meter_ptime(t, "cusr", elapsed);
X    t = buffer.tms_cstime / (double)HZ;
X    os_meter_ptime(t, "csys", elapsed);
X}
X
X#endif
END_OF_FILE
if test 24336 -ne `wc -c <'cook/os.c'`; then
    echo shar: \"'cook/os.c'\" unpacked with wrong size!
fi
# end of 'cook/os.c'
fi
if test -f 'cooktime/date.y' -a "${1}" != "-c" ; then
  echo shar: Will not clobber existing file \"'cooktime/date.y'\"
else
echo shar: Extracting \"'cooktime/date.y'\" \(27036 characters\)
sed "s/^X//" >'cooktime/date.y' <<'END_OF_FILE'
X/*
X * cook - file construction tool
X * Copyright (C) 1991, 1992, 1993 Peter Miller
X * All rights reserved.
X *    Peter Miller <[e-mail]>
X *
X * This code is derived from code which is
X * Copyright (C) 1986 Steven M. Bellovin
X *    Steven Bellovin <[e-mail]>
X *
X * MANIFEST: functions to parse dates
X */
X
X%token    AGO
X%token    COLON
X%token    COMMA
X%token    DAY
X%token    DAYZONE
X%token    ID
X%token    JUNK
X%token    MERIDIAN
X%token    MONTH
X%token    MUNIT
X%token    NUMBER
X%token    SLASH
X%token    SUNIT
X%token    UNIT
X%token    ZONE
X
X%{
X
X#include <stdio.h>
X#include <stdlib.h>
X#include <time.h>
X#include <sys/timeb.h>
X#include <ctype.h>
X#include <time.h>
X#include <string.h>
X
X#include <date.h>
X#include <s-v-arg.h>
X#include <trace.h>
X
X#define daysec (24L * 60L * 60L)
X
X#define AM 1
X#define PM 2
X
X#define DAYLIGHT 1
X#define STANDARD 2
X#define MAYBE    3
X
X#define MAX_ID_LENGTH 20
X
Xstatic    int    timeflag;
Xstatic    int    zoneflag;
Xstatic    int    dateflag;
Xstatic    int    dayflag;
Xstatic    int    relflag;
Xstatic    time_t    relsec;
Xstatic    time_t    relmonth;
Xstatic    int    hh;
Xstatic    int    mm;
Xstatic    int    ss;
Xstatic    int    merid;
Xstatic    int    day_light_flag;
Xstatic    int    dayord;
Xstatic    int    dayreq;
Xstatic    int    month;
Xstatic    int    day;
Xstatic    int    year;
Xstatic    int    ourzone;
Xstatic    char    *lptr;
Xextern    int    yylval;
Xextern    int    yydebug;
X
X
Xstatic int mdays[12] =
X{
X    31, 0, 31,  30, 31, 30,  31, 31, 30,  31, 30, 31
X};
X
X#define epoch 1970
X
Xint yyparse _((void)); /* forward */
X
X
X/*
X * NAME
X *    table - list of known names
X *
X * SYNOPSIS
X *    table_t table[];
X *
X * DESCRIPTION
X *    The table is used to hold the list of known names.
X *    This includes time zone names and days of the week, etc.
X *
X * CAVEAT
X *    It is in English.
X *    It is impossible to have a full list of time zones.
X */
X
Xtypedef struct table_t table_t;
Xstruct table_t
X{
X    char    *name;
X    int    type;
X    int    value;
X};
X
X#define HRMIN(a, b) ((a) * 60 + (b))
X
Xstatic table_t table[] =
X{
X    { "a",        ZONE,        HRMIN(1, 0),    },
X    { "a.c.s.s.t.",    DAYZONE,    -HRMIN(9, 30),    },
X    { "a.c.s.t.",    ZONE,        -HRMIN(9, 30),    },
X    { "a.d.t.",    DAYZONE,    HRMIN(4, 0),    },
X    { "a.e.s.s.t.",    DAYZONE,    -HRMIN(10, 0),    },
X    { "a.e.s.t.",    ZONE,        -HRMIN(10, 0),    },
X    { "a.m.",    MERIDIAN,    AM,        },
X    { "a.s.t.",    ZONE,        HRMIN(4, 0),    },
X    { "a.w.s.t.",    ZONE,        -HRMIN(8, 0),    }, /* (no daylight time there,    I'm told */
X    { "acsst",    DAYZONE,    -HRMIN(9, 30),    }, /* Australian Central Summer */
X    { "acst",    ZONE,        -HRMIN(9, 30),    }, /* Australian Central Time */
X    { "adt",    DAYZONE,    HRMIN(4, 0),    },
X    { "aesst",    DAYZONE,    -HRMIN(10, 0),    }, /* Australian Eastern Summer Time */
X    { "aest",    ZONE,        -HRMIN(10, 0),    }, /* Australian Eastern Time */
X    { "ago",    AGO,        1,        },
X    { "am",        MERIDIAN,    AM,        },
X    { "apr",    MONTH,        4,        },
X    { "apr.",    MONTH,        4,        },
X    { "april",    MONTH,        4,        },
X    { "ast",    ZONE,        HRMIN(4, 0),    },  /* Atlantic */
X    { "aug",    MONTH,        8,        },
X    { "aug.",    MONTH,        8,        },
X    { "august",    MONTH,        8,        },
X    { "awst",    ZONE,        -HRMIN(8, 0),    }, /* Australian Western Time */
X    { "b",        ZONE,        HRMIN(2, 0),    },
X    { "b.s.t.",    DAYZONE,    HRMIN(0, 0),    },
X    { "bst",    DAYZONE,    HRMIN(0, 0),    }, /* British Summer Time */
X    { "c",        ZONE,        HRMIN(3, 0),    },
X    { "c.d.t.",    DAYZONE,    HRMIN(6, 0),    },
X    { "c.s.t.",    ZONE,        HRMIN(6, 0),    },
X    { "cdt",    DAYZONE,    HRMIN(6, 0),    },
X    { "cst",    ZONE,        HRMIN(6, 0),    }, /* Central */
X    { "d",        ZONE,        HRMIN(4, 0),    },
X    { "day",    UNIT,        1 * 24 * 60,    },
X    { "days",    UNIT,        1 * 24 * 60,    },
X    { "dec",    MONTH,        12,        },
X    { "dec.",    MONTH,        12,        },
X    { "december",    MONTH,        12,        },
X    { "e",        ZONE,        HRMIN(5, 0),    },
X    { "e.d.t.",    DAYZONE,    HRMIN(5, 0),    },
X    { "e.e.s.t.",    DAYZONE,    HRMIN(0, 0),    },
X    { "e.e.t.",    ZONE,        HRMIN(0, 0),    },
X    { "e.s.t.",    ZONE,        HRMIN(5, 0),    },
X    { "edt",    DAYZONE,    HRMIN(5, 0),    },
X    { "eest",    DAYZONE,    HRMIN(0, 0),    }, /* European Eastern Summer Time */
X    { "eet",    ZONE,        HRMIN(0, 0),    }, /* European Eastern Time */
X    { "eigth",    NUMBER,        8,        },
X    { "eleventh",    NUMBER,        11,        },
X    { "est",    ZONE,        HRMIN(5, 0),    }, /* Eastern */
X    { "f",        ZONE,        HRMIN(6, 0),    },
X    { "feb",    MONTH,        2,        },
X    { "feb.",    MONTH,        2,        },
X    { "february",    MONTH,        2,        },
X    { "fifth",    NUMBER,        5,        },
X    { "first",    NUMBER,        1,        },
X    { "fortnight",    UNIT,        14 * 24 * 60,    },
X    { "fortnights",    UNIT,        14 * 24 * 60,    },
X    { "fourth",    NUMBER,        4,        },
X    { "fri",    DAY,        5,        },
X    { "fri.",    DAY,        5,        },
X    { "friday",    DAY,        5,        },
X    { "g",        ZONE,        HRMIN(7, 0),    },
X    { "g.m.t.",    ZONE,        HRMIN(0, 0),    },
X    { "gmt",    ZONE,        HRMIN(0, 0),    },
X    { "h",        ZONE,        HRMIN(8, 0),    },
X    { "h.d.t.",    DAYZONE,    HRMIN(10, 0),    },
X    { "h.s.t.",    ZONE,        HRMIN(10, 0),    },
X    { "hdt",    DAYZONE,    HRMIN(10, 0),    },
X    { "hour",    UNIT,        60,        },
X    { "hours",    UNIT,        60,        },
X    { "hr",        UNIT,        60,        },
X    { "hrs",    UNIT,        60,        },
X    { "hst",    ZONE,        HRMIN(10, 0),    }, /* Hawaii */
X    { "i",        ZONE,        HRMIN(9, 0),    },
X    { "j.s.t.",    ZONE,        -HRMIN(9, 0),    }, /* Japan Standard Time */
X    { "jan",    MONTH,        1,        },
X    { "jan.",    MONTH,        1,        },
X    { "january",    MONTH,        1,        },
X    { "jst",    ZONE,        -HRMIN(9, 0),    }, /* Japan Standard Time */
X    { "jul",    MONTH,        7,        },
X    { "jul.",    MONTH,        7,        },
X    { "july",    MONTH,        7,        },
X    { "jun",    MONTH,        6,        },
X    { "jun.",    MONTH,        6,        },
X    { "june",    MONTH,        6,        },
X    { "k",        ZONE,        HRMIN(10, 0),    },
X    { "l",        ZONE,        HRMIN(11, 0),    },
X    { "last",    NUMBER,        -1,        },
X    { "m",        ZONE,        HRMIN(12, 0),    },
X    { "m.d.t.",    DAYZONE,    HRMIN(7, 0),    },
X    { "m.e.s.t.",    DAYZONE,    -HRMIN(1, 0),    },
X    { "m.e.t.",    ZONE,        -HRMIN(1, 0),    },
X    { "m.s.t.",    ZONE,        HRMIN(7, 0),    },
X    { "mar",    MONTH,        3,        },
X    { "mar.",    MONTH,        3,        },
X    { "march",    MONTH,        3,        },
X    { "may",    MONTH,        5,        },
X    { "mdt",    DAYZONE,    HRMIN(7, 0),    },
X    { "mest",    DAYZONE,    -HRMIN(1, 0),    }, /* Middle European Summer Time */
X    { "met",    ZONE,        -HRMIN(1, 0),    }, /* Middle European Time */
X    { "min",    UNIT,        1,        },
X    { "mins",    UNIT,        1,        },
X    { "minute",    UNIT,        1,        },
X    { "minutes",    UNIT,        1,        },
X    { "mon",    DAY,        1,        },
X    { "mon.",    DAY,        1,        },
X    { "monday",    DAY,        1,        },
X    { "month",    MUNIT,        1,        },
X    { "months",    MUNIT,        1,        },
X    { "mst",    ZONE,        HRMIN(7, 0),    }, /* Mountain */
X    { "n",        ZONE,        -HRMIN(1, 0),    },
X    { "n.s.t.",    ZONE,        HRMIN(3, 30),    },
X    { "next",    NUMBER,        2,        },
X    { "ninth",    NUMBER,        9,        },
X    { "nov",    MONTH,        11,        },
X    { "nov.",    MONTH,        11,        },
X    { "november",    MONTH,        11,        },
X    { "now",    UNIT,        0,        },
X    { "nst",    ZONE,        HRMIN(3, 30),    }, /* Newfoundland */
X    { "o",        ZONE,        -HRMIN(2, 0),    },
X    { "oct",    MONTH,        10,        },
X    { "oct.",    MONTH,        10,        },
X    { "october",    MONTH,        10,        },
X    { "p",        ZONE,        -HRMIN(3, 0),    },
X    { "p.d.t.",    DAYZONE,    HRMIN(8, 0),    },
X    { "p.m.",    MERIDIAN,    PM,        },
X    { "p.s.t.",    ZONE,        HRMIN(8, 0),    },
X    { "pdt",    DAYZONE,    HRMIN(8, 0),    },
X    { "pm",        MERIDIAN,    PM,        },
X    { "pst",    ZONE,        HRMIN(8, 0),    }, /* Pacific */
X    { "q",        ZONE,        -HRMIN(4, 0),    },
X    { "r",        ZONE,        -HRMIN(5, 0),    },
X    { "s",        ZONE,        -HRMIN(6, 0),    },
X    { "sat",    DAY,        6,        },
X    { "sat.",    DAY,        6,        },
X    { "saturday",    DAY,        6,        },
X    { "sec",    SUNIT,        1,        },
X    { "second",    SUNIT,        1,        },
X    { "seconds",    SUNIT,        1,        },
X    { "secs",    SUNIT,        1,        },
X    { "sep",    MONTH,        9,        },
X    { "sep.",    MONTH,        9,        },
X    { "sept",    MONTH,        9,        },
X    { "sept.",    MONTH,        9,        },
X    { "september",    MONTH,        9,        },
X    { "seventh",    NUMBER,        7,        },
X    { "sixth",    NUMBER,        6,        },
X    { "sun",    DAY,        0,        },
X    { "sun.",    DAY,        0,        },
X    { "sunday",    DAY,        0,        },
X    { "t",        ZONE,        -HRMIN(7, 0),    },
X    { "tenth",    NUMBER,        10,        },
X    { "third",    NUMBER,        3,        },
X    { "this",    UNIT,        0,        },
X    { "thu",    DAY,        4,        },
X    { "thu.",    DAY,        4,        },
X    { "thur",    DAY,        4,        },
X    { "thur.",    DAY,        4,        },
X    { "thurs",    DAY,        4,        },
X    { "thurs.",    DAY,        4,        },
X    { "thursday",    DAY,        4,        },
X    { "today",    UNIT,        0,        },
X    { "tomorrow",    UNIT,        1 * 24 * 60,    },
X    { "tue",    DAY,        2,        },
X    { "tue.",    DAY,        2,        },
X    { "tues",    DAY,        2,        },
X    { "tues.",    DAY,        2,        },
X    { "tuesday",    DAY,        2,        },
X    { "twelfth",    NUMBER,        12,        },
X    { "u",        ZONE,        -HRMIN(8, 0),    },
X    { "u.t.",    ZONE,        HRMIN(0, 0),    },
X    { "ut",        ZONE,        HRMIN(0, 0),    },
X    { "v",        ZONE,        -HRMIN(9, 0),    },
X    { "w",        ZONE,        -HRMIN(10, 0),    },
X    { "w.e.s.t.",    DAYZONE,    -HRMIN(2, 0),    },
X    { "w.e.t.",    ZONE,        -HRMIN(2, 0),    },
X    { "wed",    DAY,        3,        },
X    { "wed.",    DAY,        3,        },
X    { "wednes",    DAY,        3,        },
X    { "wednes.",    DAY,        3,        },
X    { "wednesday",    DAY,        3,        },
X    { "week",    UNIT,        7 * 24 * 60,    },
X    { "weeks",    UNIT,        7 * 24 * 60,    },
X    { "west",    DAYZONE,    -HRMIN(2, 0),    }, /* Western European Summer Time */
X    { "wet",    ZONE,        -HRMIN(2, 0),    }, /* Western European Time */
X    { "x",        ZONE,        -HRMIN(11, 0),    },
X    { "y",        ZONE,        -HRMIN(12, 0),    },
X    { "y.d.t.",    DAYZONE,    HRMIN(9, 0),    },
X    { "y.s.t.",    ZONE,        HRMIN(9, 0),    },
X    { "ydt",    DAYZONE,    HRMIN(9, 0),    },
X    { "year",    MUNIT,        12,        },
X    { "years",    MUNIT,        12,        },
X    { "yesterday",    UNIT,        -1*24*60,    },
X    { "yst",    ZONE,        HRMIN(9, 0),    }, /* Yukon */
X    { "z",        ZONE,        HRMIN(0, 0),    },
X};
X
X
X/*
X * NAME
X *    timeconv - convert a time
X *
X * SYNOPSIS
X *    time_t timeconv(int hh, int mm, int ss, int mer);
X *
X * DESCRIPTION
X *    The timeconv function is used to convert a time
X *    specified in hours minutes and seconds, into seconds past midnight.
X *
X * ARGUMENTS
X *    hh    hours, range depends on the meridian
X *    mm    minutes, 0..59
X *    ss    seconds, 0..59
X *    mer    meridian to use: AM, PM or 24
X *
X * RETURNS
X *    time_t; seconds past midnight; -1 on any error.
X */
X
Xstatic time_t timeconv _((int hh, int mm, int ss, int mer));
X
Xstatic time_t
Xtimeconv(hh, mm, ss, mer)
X    int    hh;
X    int    mm;
X    int    ss;
X    int    mer;
X{
X    time_t    result;
X
X    /*
X     * perform sanity checks on input
X     */
X    trace(("timeconv(hh = %d, mm = %d, ss = %d, mer = %d)\n{\n"/*}*/, hh, mm, ss, mer));
X    result = -1;
X    if (mm < 0 || mm > 59 || ss < 0 || ss > 59)
X        goto done;
X
X    /*
X     * perform range checks depending on the meridian
X     */
X    switch (mer)
X    {
X    case AM:
X        if (hh < 1 || hh > 12)
X            goto done;
X        if (hh == 12)
X            hh = 0;
X        break;
X
X    case PM:
X        if (hh < 1 || hh > 12)
X            goto done;
X        if (hh == 12)
X            hh = 0;
X        hh += 12;
X        break;
X
X    case 24:
X        if (hh < 0 || hh > 23)
X            goto done;
X        break;
X
X    default:
X        goto done;
X    }
X    result = ((hh * 60L + mm) * 60L + ss);
Xdone:
X    trace(("return %ld;\n", (long)result));
X    trace((/*{*/"}\n"));
X    return result;
X}
X
X
X/*
X * NAME
X *    dateconv - convert a date
X *
X * SYNOPSIS
X *    time_t dateconv(int mm, int dd, int year, int h, int m, int s,
X *        int mer, int zone, int dayflag);
X *
X * DESCRIPTION
X *    The dateconv function may be used to convert a date after the
X *    date string has been taken apart by yyparse.
X *
X * ARGUMENTS
X *    mm    month number, in the range 1..12
X *    year    year number,  in several ranges:
X *        0..37 means 2000..2037
X *        70..99 means 1970..1999
X *        1970..2037 mean themselves.
X *    dd    day of month, in the range 1..max, where max varies for
X *        each month, as per the catchy jingle (except February,
X *        which is a monster).
X *    h    hours since midnight or meridian
X *    m    minutes past hour
X *    s    seconds past minute
X *    mer    meridian, AM or PM.
X *    zone    minutes correction for the time zone.
X *    dayflag    whether to use daylight savings: STANDARD, DAYLIGHT or MAYBE.
X *
X * RETURNS
X *    time_t; the time in seconds past Jan 1 0:00:00 1970 GMT, this will
X *    always be positive or zero; -1 is returned for any error.
X *
X * CAVEAT
X *    The date functions only work between 1970 and 2037,
X *    because 0 is Jan 1 00:00:00 1970 GMT
X *    and (2^31-1) is Jan 19 03:14:07 2038 GMT
X *    hence some if the weir magic number below.
X *
X *    Because -1 is used to represent errors, times before noon Jan 1 1970
X *    in places east of GMT can't always be represented.
X */
X
Xstatic time_t dateconv _((int mm, int dd, int year, int h, int m, int s,
X    int mer, int zone, int dayflag));
X
Xstatic time_t
Xdateconv(mm, dd, year, h, m, s, mer, zone, dayflag)
X    int    mm;
X    int    dd;
X    int    year;
X    int    h;
X    int    m;
X    int    s;
X    int    mer;
X    int    zone;
X    int    dayflag;
X{
X    time_t    result;
X    time_t    tod;
X    time_t    jdate;
X    int    i;
X
X    /*
X     * make corrections for the year
X     *
X     * If it is 0..99, RFC822 says pick closest century.
X     */
X    trace(("dateconv(mm = %d, dd = %d, year = %d, h = %d, m = %d, s = %d, mer = %d, zone = %d, dayflag = %d)\n{\n"/*}*/, mm, dd, year, h, m, s, mer, zone, dayflag));
X    result = -1;
X    if (year < 0)
X        year = -year;
X    if (year < 38)
X        year += 2000;
X    else if (year < 100)
X        year += 1900;
X
X    /*
X     * correct February length once we know the year
X     */
X    mdays[1] = 28 + (year % 4 == 0 && (year % 100 != 0 || year % 400 == 0));
X
X    /*
X     * perform some sanity checks on the input
X     */
X    if
X    (
X        year < epoch
X    ||
X        year >= 2038
X    ||
X        mm < 1
X    ||
X        mm > 12
X    ||
X        dd < 1
X    ||
X        dd > mdays[--mm]
X    )
X        goto done;
X
X    /*
X     * Determine the julian day number * of the dd-mm-yy given.
X     * Turn it into seconds, and add in the time zone correction.
X     */
X    jdate = dd - 1;
X        for (i = 0; i < mm; i++)
X        jdate += mdays[i];
X    for (i = epoch; i < year; i++)
X        jdate += 365 + (i % 4 == 0);
X    jdate *= daysec;
X    jdate += zone * 60L;
X
X    /*
X     * Determine the time of day.
X     * that is, seconds from midnight.
X     * Add it into the julian date.
X     */
X    tod = timeconv(h, m, s, mer);
X    if (tod < 0)
X        goto done;
X    jdate += tod;
X
X    /*
X     * Perform daylight savings correction if necessary.
X     * (This assumes 1 hour daylite savings, which is probably wrong.)
X     */
X    if
X    (
X        dayflag == DAYLIGHT
X    ||
X        (dayflag == MAYBE && localtime(&jdate)->tm_isdst)
X    )
X        jdate += -1 * 60 * 60;
X
X    /*
X     * there you have it.
X     */
X    result = jdate;
Xdone:
X    trace(("return %ld;\n", (long)result));
X    trace((/*{*/"}\n"));
X    return result;
X}
X
X
X/*
X * NAME
X *    daylcorr
X *
X * SYNOPSIS
X *    time_t daylcorr(time_t future, time_t now);
X *
X * DESCRIPTION
X *    The daylcorr function is used to determine the difference in seconds
X *    between two times, taking daylight savings into account.
X *
X * ARGUMENTS
X *    future    - a later time
X *    now    - an earlier time
X *
X * RETURNS
X *    time_t; the difference in seconds
X *
X * CAVEAT
X *    Assumes daylight savings is alays an integral number of hours.
X *    This is wrong is Saudi Arabia (time zone changes during the day),
X *    and South Australia (half hour DLS).
X */
X
Xstatic time_t daylcorr _((time_t future, time_t now));
X
Xstatic time_t
Xdaylcorr(future, now)
X    time_t    future;
X    time_t    now;
X{
X    int    fdayl;
X    int    nowdayl;
X    time_t    result;
X
X    trace(("daylcorr(future = %ld, now = %ld)\n{\n"/*}*/, (long)future, (long)now));
X    nowdayl = (localtime(&now)->tm_hour + 1) % 24;
X    fdayl = (localtime(&future)->tm_hour + 1) % 24;
X    result = ((future - now) + 60L * 60L * (nowdayl - fdayl));
X    trace(("return %ld;\n", (long)result));
X    trace((/*{*/"}\n"));
X    return result;
X}
X
X
X/*
X * NAME
X *    dayconv
X *
X * SYNOPSIS
X *    time_t dayconv(int ord, int day, time_t now);
X *
X * DESCRIPTION
X *    The dayconv function is used to convert a day-of-the-week into
X *    a meaningful time.
X *
X * ARGUMENTS
X *    ord    - the ord'th day from now
X *    day    - which day of the week
X *    now    - relative to this
X *
X * RETURNS
X *    time_t; time in seconds from epoch
X */
X
Xstatic time_t dayconv _((int ord, int day, time_t now));
X
Xstatic time_t
Xdayconv(ord, day, now)
X    int    ord;
X    int    day;
X    time_t    now;
X{
X    time_t    tod;
X    time_t    result;
X
X    trace(("dayconv(ord = %d, day = %d, now = %ld)\n{\n"/*}*/, ord, day, (long)now));
X    tod = now;
X    tod += daysec * ((day - localtime(&tod)->tm_wday + 7) % 7);
X    tod += 7 * daysec * (ord <= 0 ? ord : ord - 1);
X    result = daylcorr(tod, now);
X    trace(("return %ld;\n", (long)result));
X    trace((/*{*/"}\n"));
X    return result;
X}
X
X
X/*
X * NAME
X *    monthadd
X *
X * SYNOPSIS
X *    time_t monthadd(time_t sdate, time_t relmonth);
X *
X * DESCRIPTION
X *    The monthadd function is used to add a given number of
X *    months to a specified time.
X *
X * ARGUMENTS
X *    sdate    - add the months to this
X *    relmonth - add this many months
X *
X * RETURNS
X *    time_t; seconds since the epoch
X */
X
Xstatic time_t monthadd _((time_t sdate, time_t relmonth));
X
Xstatic time_t
Xmonthadd(sdate, relmonth)
X    time_t    sdate;
X    time_t    relmonth;
X{
X    struct tm *ltime;
X    int    mm;
X    int    year;
X    time_t    result;
X
X    trace(("monthadd(sdate = %ld, relmonth = %ld)\n{\n"/*}*/, (long)sdate, (long)relmonth));
X    if (relmonth == 0)
X        result = 0;
X    else
X    {
X        ltime = localtime(&sdate);
X        mm = 12 * ltime->tm_year + ltime->tm_mon + relmonth;
X        year = mm / 12;
X        mm = mm % 12 + 1;
X        result =
X            dateconv
X            (
X                mm,
X                ltime->tm_mday,
X                year,
X                ltime->tm_hour,
X                ltime->tm_min,
X                ltime->tm_sec,
X                24,
X                ourzone,
X                MAYBE
X            );
X        if (result >= 0)
X            result = daylcorr(result, sdate);
X    }
X    trace(("return %ld;\n", (long)result));
X    trace((/*{*/"}\n"));
X    return result;
X}
X
X
X/*
X * NAME
X *    lookup - find name
X *
X * SYNOPSIS
X *    int lookup(char *id);
X *
X * DESCRIPTION
X *    The lookup function is used to find a token corresponding to
X *    a given name.
X *
X * ARGUMENTS
X *    id    - name to search for.  Assumes already downcased.
X *
X * RETURNS
X *    int; yacc token, ID if not found.
X */
X
Xstatic int lookup _((char *id));
X
Xstatic int
Xlookup(id)
X    char    *id;
X{
X    table_t    *tp;
X    int    min;
X    int    max;
X    int    mid;
X    int    cmp;
X    int    result;
X
X    /*
X     * binary chop the table
X     */
X    trace(("lookup(id = \"%s\")\n{\n"/*}*/, id));
X    result = ID;
X    min = 0;
X    max = SIZEOF(table) - 1;
X    while (min <= max)
X    {
X        mid = (min + max) / 2;
X        tp = table + mid;
X        cmp = strcmp(id, tp->name);
X        if (!cmp)
X        {
X            yylval = tp->value;
X            result = tp->type;
X            break;
X        }
X        if (cmp < 0)
X            max = mid - 1;
X        else
X            min = mid + 1;
X    }
X    trace(("return %d;\n", result));
X    trace((/*{*/"}\n"));
X    return result;
X}
X
X
X/*
X * NAME
X *    yylex - lexical analyser
X *
X * SYNOPSIS
X *    int yylex(void);
X *
X * DESCRIPTION
X *    The yylex function is used to scan the input string
X *    and break it into discrete tokens.
X *
X * RETURNS
X *    int; the yacc token, 0 means the-end.
X */
X
Xstatic int yylex _((void));
X
Xstatic int
Xyylex()
X{
X    int    sign;
X    int    c;
X    char    *p;
X    char    idbuf[MAX_ID_LENGTH];
X    int    pcnt;
X    int    token;
X
X    trace(("yylex()\n{\n"/*}*/));
X    yylval = 0;
X    for (;;)
X    {
X        /*
X         * get the next input character
X         */
X        c = *lptr++;
X
X        /*
X         * action depends on the character
X         */
X        switch (c)
X        {
X        case 0:
X            token = 0;
X            lptr--;
X            break;
X
X        case ' ':
X        case '\t':
X            /*
X             * ignore white space
X             */
X            continue;
X
X        case ':':
X            token = COLON;
X            break;
X
X        case ',':
X            token = COMMA;
X            break;
X
X        case '/':
X            token = SLASH;
X            break;
X
X        case '-':
X            if (!isdigit(*lptr))
X            {
X                /*
X                 * ignore lonely '-'s
X                 */
X                continue;
X            }
X            sign = -1;
X            c = *lptr++;
X            goto number;
X
X        case '+':
X            if (!isdigit(*lptr))
X            {
X                token = c;
X                break;
X            }
X            sign = 1;
X            c = *lptr++;
X            goto number;
X
X        case '0': case '1': case '2': case '3': case '4':
X        case '5': case '6': case '7': case '8': case '9':
X            /*
X             * numbers
X             */
X            sign = 1;
X            number:
X            for (;;)
X            {
X                yylval = yylval * 10 + c - '0';
X                c = *lptr++;
X                switch (c)
X                {
X                case '0': case '1': case '2': case '3':
X                case '4': case '5': case '6': case '7':
X                case '8': case '9':
X                    continue;
X                }
X                break;
X            }
X            yylval *= sign;
X            lptr--;
X            token = NUMBER;
X            break;
X
X        case 'a': case 'b': case 'c': case 'd': case 'e':
X        case 'f': case 'g': case 'h': case 'i': case 'j':
X        case 'k': case 'l': case 'm': case 'n': case 'o':
X        case 'p': case 'q': case 'r': case 's': case 't':
X        case 'u': case 'v': case 'w': case 'x': case 'y': case 'z':
X        case 'A': case 'B': case 'C': case 'D': case 'E':
X        case 'F': case 'G': case 'H': case 'I': case 'J':
X        case 'K': case 'L': case 'M': case 'N': case 'O':
X        case 'P': case 'Q': case 'R': case 'S': case 'T':
X        case 'U': case 'V': case 'W': case 'X': case 'Y': case 'Z':
X            /*
X             * name
X             */
X            p = idbuf;
X            for (;;)
X            {
X                if (isupper(c))
X                    c = tolower(c);
X                if (p < idbuf + sizeof(idbuf) - 1)
X                    *p++ = c;
X                c = *lptr++;
X                switch (c)
X                {
X                case 'a': case 'b': case 'c': case 'd':
X                case 'e': case 'f': case 'g': case 'h':
X                case 'i': case 'j': case 'k': case 'l':
X                case 'm': case 'n': case 'o': case 'p':
X                case 'q': case 'r': case 's': case 't':
X                case 'u': case 'v': case 'w': case 'x':
X                case 'y': case 'z':
X                case 'A': case 'B': case 'C': case 'D':
X                case 'E': case 'F': case 'G': case 'H':
X                case 'I': case 'J': case 'K': case 'L':
X                case 'M': case 'N': case 'O': case 'P':
X                case 'Q': case 'R': case 'S': case 'T':
X                case 'U': case 'V': case 'W': case 'X':
X                case 'Y': case 'Z':
X                case '.':
X                    continue;
X                }
X                break;
X            }
X            *p = 0;
X            lptr--;
X            token = lookup(idbuf);
X            break;
X
X        case '('/*)*/:
X            /*
X             * comment
X             */
X            for (pcnt = 1; pcnt > 0; )
X            {
X                c = *lptr++;
X                switch (c)
X                {
X                case 0:
X                    --lptr;
X                    pcnt = 0;
X                    break;
X
X                case '('/*)*/:
X                    pcnt++;
X                    break;
X
X                case /*(*/')':
X                    pcnt--;
X                    break;
X                }
X            }
X            continue;
X
X        default:
X            /*
X             * unrecognosed
X             */
X            token = JUNK;
X            break;
X        }
X        break;
X    }
X    trace(("yylval = %d;\n", yylval));
X    trace(("return %d;\n", token));
X    trace((/*{*/"}\n"));
X    return token;
X}
X
X
X/*
X * NAME
X *    date_scan
X *
X * SYNOPSIS
X *    time_t date_scan(char *s);
X *
X * DESCRIPTION
X *    The date_scan function is used to scan a string and
X *    return a number of seconds since epoch.
X *
X * ARGUMENTS
X *    s    - string to scan
X *
X * RETURNS
X *    time_t; seconds to epoch, -1 on error.
X *
X * CAVEAT
X *    it isn't psychic
X */
X
Xtime_t
Xdate_scan(p)
X    char        *p;
X{
X    struct timeb    *now;
X    struct tm    *lt;
X    struct timeb    ftz;
X    time_t        result;
X    time_t        tod;
X
X    /*
X     * find time zone info, if not given
X     */
X    trace(("date_scan(p = \"%s\")\n{\n"/*}*/, p));
X    lptr = p;
X    now = &ftz;
X    ftime(&ftz);
X
X    /*
X     * initialize things
X     */
X    lt = localtime(&now->time);
X    year = lt->tm_year;
X    month = lt->tm_mon + 1;
X    day = lt->tm_mday;
X    relsec = 0;
X    relmonth = 0;
X    timeflag = 0;
X    zoneflag = 0;
X    dateflag = 0;
X    dayflag = 0;
X    relflag = 0;
X#ifdef CONF_pyramid_broken_ftime
X    ourzone = now->timezone / 60;
X#else
X    ourzone = now->timezone;
X#endif
X    day_light_flag = MAYBE;
X    hh = 0;
X    mm = 0;
X    ss = 0;
X    merid = 24;
X
X    /*
X     * parse the string
X     */
X#ifdef DEBUG
X    yydebug = trace_pretest_;
X#endif
X    trace(("yyparse()\n{\n"/*}*/));
X    result = yyparse();
X    trace((/*{*/"}\n"));
X    if (result)
X    {
X        result = -1;
X        goto done;
X    }
X
X    /*
X     * sanity checks
X     */
X    result = -1;
X    if (timeflag > 1 || zoneflag > 1 || dateflag > 1 || dayflag > 1)
X        goto done;
X
X    if (dateflag || timeflag || dayflag)
X    {
X        result =
X            dateconv
X            (
X                month,
X                day,
X                year,
X                hh,
X                mm,
X                ss,
X                merid,
X                ourzone,
X                day_light_flag
X            );
X        if (result < 0)
X            goto done;
X    }
X    else
X    {
X        result = now->time;
X        if (!relflag)
X        {
X            result -=
X                (
X                    (lt->tm_hour * 60L + lt->tm_min * 60)
X                +
X                    lt->tm_sec
X                );
X        }
X    }
X
X    result += relsec;
X    relsec = monthadd(result, relmonth);
X    if (relsec < 0)
X    {
X        result = -1;
X        goto done;
X    }
X    result += relsec;
X
X    if (dayflag && !dateflag)
X    {
X        tod = dayconv(dayord, dayreq, result);
X        result += tod;
X    }
X
X    /*
X     * here for all exits
X     */
Xdone:
X    trace(("return %ld;\n", (long)result));
X    trace((/*{*/"}\n"));
X    return result;
X}
X
X
X/*
X * NAME
X *    date_string - build one
X *
X * SYNOPSIS
X *    char *date_string(time_t when);
X *
X * DESCRIPTION
X *    The date_string function may be used to construct a
X *    string from a given time in seconds.
X *
X *    The string will conform to the RFC822 standard,
X *    which states a definite preference for GMT dates.
X *
X * ARGUMENTS
X *    when    the time to be rendered.
X *
X * RETURNS
X *    Pointer to string containing rendered time.
X *    The contents of this string will remain undisturbed
X *    only until the next call to date_string.
X */
X
Xchar *
Xdate_string(when)
X    time_t        when;
X{
X    struct tm    *tm;
X    static char    buffer[32];
X
X    static char    *weekday_name[] =
X    {
X        "Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat",
X    };
X
X    static char    *month_name[] =
X    {
X        "Jan", "Feb", "Mar", "Apr", "May", "Jun",
X        "Jul", "Aug", "Sep", "Oct", "Nov", "Dec",
X    };
X
X    /*
X     * break the given time down into components
X     *    (RFC1036 likes GMT, remember)
X     */
X    trace(("date_string(when = %ld)\n{\n"/*}*/, (long)when));
X    tm = gmtime(&when);
X
X    /*
X     * build the date string
X     */
X    sprintf
X    (
X        buffer,
X        "%s,%3d %s %2.2d %2.2d:%2.2d:%2.2d GMT",
X        weekday_name[tm->tm_wday],
X        tm->tm_mday,
X        month_name[tm->tm_mon],
X        tm->tm_year % 100,
X        tm->tm_hour,
X        tm->tm_min,
X        tm->tm_sec
X    );
X    trace(("return \"%s\";\n", buffer));
X    trace((/*{*/"}\n"));
X    return buffer;
X}
X
X
X/*
X * NAME
X *    yyerror
X *
X * SYNOPSIS
X *    void yyerror(char *);
X *
X * DESCRIPTION
X *    The yyerror function is invoked by yacc to report
X *    errors, but we just throw it away.
X *
X * ARGUMENTS
X *    s    - error to report
X */
X
Xstatic void yyerror _((char *));
X
Xstatic void
Xyyerror(s)
X    char    *s;
X{
X    trace(("yyerror(s = \"%s\")\n{\n"/*}*/, s));
X    trace((/*{*/"}\n"));
X}
X
X
X/*
X * NAME
X *    yytrace - follow parser actions
X *
X * SYNOPSIS
X *    void yytrace(char *, ...);
X *
X * DESCRIPTION
X *    The yytrace function is used to print the various shifts
X *    and reductions, etc, done by the yacc-generated parser.
X *    lines are accumulated and printed whole,
X *    so as to avoid confusing the trace output.
X *
X * ARGUMENTS
X *    as for printf
X *
X * CAVEAT
X *    only available when DEBUG is defined
X */
X
X#ifdef DEBUG
X#define YYDEBUG 1
X
X#define printf yytrace
X
Xstatic void yytrace _((char *, ...));
X
Xstatic void
Xyytrace(s sva_last)
X    char        *s;
X    sva_last_decl
X{
X    va_list        ap;
X    static char    line[1024];
X    char        buffer[512];
X    char        *cp;
X
X    sva_init(ap, s);
X    vsprintf(buffer, s, ap);
X    va_end(ap);
X    strcat(line, buffer);
X    cp = line + strlen(line) - 1;
X    if (cp > line && *cp == '\n')
X    {
X        *cp = 0;
X        trace_printf("%s\n", line);
X        line[0] = 0;
X    }
X}
X
X#endif /* DEBUG */
X
X%}
X
X%%
X
Xtimedate
X    : /* empty */
X    | timedate item
X    ;
X
Xitem
X    : TimeSpecification
X        { timeflag++; }
X    | TimeZone
X        { zoneflag++; }
X    | DateSpecification
X        { dateflag++; }
X    | DayOfWeekSpecification
X        { dayflag++; }
X    | RelativeSpecification
X        { relflag++; }
X    | NumberSpecification
X    ;
X
XNumberSpecification
X    : NUMBER
X        {
X            if (timeflag && dateflag && !relflag)
X                year = $1;
X            else
X            {
X                timeflag++;
X                hh = $1 / 100;
X                mm = $1 % 100;
X                ss = 0;
X                merid = 24;
X            }
X        }
X    ;
X
XTimeSpecification
X    : NUMBER MERIDIAN
X        {
X            hh = $1;
X            mm = 0;
X            ss = 0;
X            merid = $2;
X        }
X    | NUMBER COLON NUMBER
X        {
X            hh = $1;
X            mm = $3;
X            merid = 24;
X        }
X    | NUMBER COLON NUMBER MERIDIAN
X        {
X            hh = $1;
X            mm = $3;
X            merid = $4;
X        }
X    | NUMBER COLON NUMBER NUMBER
X        {
X            hh = $1;
X            mm = $3;
X            merid = 24;
X            day_light_flag = STANDARD;
X            $4 = -$4;
X            ourzone = $4 % 100 + 60 * $4 / 100;
X        }
X    | NUMBER COLON NUMBER COLON NUMBER
X        {
X            hh = $1;
X            mm = $3;
X            ss = $5;
X            merid = 24;
X        }
X    | NUMBER COLON NUMBER COLON NUMBER MERIDIAN
X        {
X            hh = $1;
X            mm = $3;
X            ss = $5;
X            merid = $6;
X        }
X    | NUMBER COLON NUMBER COLON NUMBER NUMBER
X        {
X            hh = $1;
X            mm = $3;
X            ss = $5;
X            merid = 24;
X            day_light_flag = STANDARD;
X            $6 = -$6;
X            ourzone = $6 % 100 + 60 * $6 / 100;
X        }
X    ;
X
XTimeZone
X    : ZONE
X        {
X            ourzone = $1;
X            day_light_flag = STANDARD;
X        }
X    | DAYZONE
X        {
X            ourzone = $1;
X            day_light_flag = DAYLIGHT;
X        }
X    ;
X
XDayOfWeekSpecification
X    : DAY
X        {
X            dayord = 1;
X            dayreq = $1;
X        }
X    | DAY COMMA
X        {
X            dayord = 1;
X            dayreq = $1;
X        }
X    | NUMBER DAY
X        {
X            dayord = $1;
X            dayreq = $2;
X        }
X    ;
X
XDateSpecification
X    : NUMBER SLASH NUMBER
X        {
X            month = $1;
X            day = $3;
X        }
X    | NUMBER SLASH NUMBER SLASH NUMBER
X        {
X            month = $1;
X            day = $3;
X            year = $5;
X        }
X    | MONTH NUMBER
X        {
X            month = $1;
X            day = $2;
X        }
X    | MONTH NUMBER COMMA NUMBER
X        {
X            month = $1;
X            day = $2;
X            year = $4;
X        }
X    | NUMBER MONTH
X        {
X            month = $2;
X            day = $1;
X        }
X    | NUMBER MONTH NUMBER
X        {
X            month = $2;
X            day = $1;
X            year = $3;
X        }
X    ;
X
XRelativeSpecification
X    : NUMBER UNIT
X        { relsec +=  60L * $1 * $2; }
X    | NUMBER MUNIT
X        { relmonth += $1 * $2; }
X    | NUMBER SUNIT
X        { relsec += $1; }
X    | UNIT
X        { relsec +=  60L * $1; }
X    | MUNIT
X        { relmonth += $1; }
X    | SUNIT
X        { relsec++; }
X    | RelativeSpecification AGO
X        {
X            relsec = -relsec;
X            relmonth = -relmonth;
X        }
X    ;
END_OF_FILE
if test 27036 -ne `wc -c <'cooktime/date.y'`; then
    echo shar: \"'cooktime/date.y'\" unpacked with wrong size!
fi
# end of 'cooktime/date.y'
fi
echo shar: End of archive 9 \(of 11\).
cp /dev/null ark9isdone
MISSING=""
for I in 1 2 3 4 5 6 7 8 9 10 11 ; do
    if test ! -f ark${I}isdone ; then
    MISSING="${MISSING} ${I}"
    fi
done
if test "${MISSING}" = "" ; then
    echo You have unpacked all 11 archives.
    rm -f ark[1-9]isdone ark[1-9][0-9]isdone
else
    echo You still need to unpack the following archives:
    echo "        " ${MISSING}
fi
##  End of shell archive.
exit 0