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Disc to the Future 2
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Disc to the Future Part II Programmer's Reference (Wayzata Technology)(6013)(1992).bin
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UNIX
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C
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INDENT
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IO.C
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1989-09-11
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733 lines
/*
* Copyright (c) 1985 Sun Microsystems, Inc.
* Copyright (c) 1980 The Regents of the University of California.
* Copyright (c) 1976 Board of Trustees of the University of Illinois.
* All rights reserved.
*
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley, the University of Illinois,
* Urbana, and Sun Microsystems, Inc. The name of either University
* or Sun Microsystems may not be used to endorse or promote products
* derived from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
*/
#ifndef lint
static char sccsid[] = "@(#)io.c 5.10 (Berkeley) 9/15/88";
#endif /* not lint */
#include "indent_globs.h"
#include <ctype.h>
/* POSIX says that fcntl.h should exist. Linking either sys/fcntl.h
or sys/file.h to fcntl.h should work fine if you don't have fcntl.h */
#include <fcntl.h>
#include <sys/types.h>
#include <sys/stat.h>
int suppress_blanklines = 0;
int comment_open;
int paren_target;
/* true if INDENT OFF is in effect */
static int inhibit_formatting;
dump_line()
{ /* dump_line is the routine that actually
* effects the printing of the new source. It
* prints the label section, followed by the
* code section with the appropriate nesting
* level, followed by any comments */
register int cur_col,
target_col;
static not_first_line;
if (parser_state_tos->procname[0]) {
if (troff) {
if (comment_open) {
comment_open = 0;
fprintf(output, ".*/\n");
}
fprintf(output, ".Pr \"%.*s\"\n", parser_state_tos->procname_end - parser_state_tos->procname,
parser_state_tos->procname);
}
parser_state_tos->ind_level = 0;
parser_state_tos->procname = "\0";
}
if (s_code == e_code && s_lab == e_lab && s_com == e_com) {
/* If we have a formfeed on a blank line, we should just output it,
rather than treat it as a normal blank line. */
if (parser_state_tos->use_ff)
{
putc('\014',output);
parser_state_tos->use_ff = false;
}
else
{
if (suppress_blanklines > 0)
suppress_blanklines--;
else {
parser_state_tos->bl_line = true;
n_real_blanklines++;
}
}
}
else if (!inhibit_formatting) {
suppress_blanklines = 0;
parser_state_tos->bl_line = false;
if (prefix_blankline_requested && not_first_line)
if (swallow_optional_blanklines) {
if (n_real_blanklines == 1)
n_real_blanklines = 0;
}
else {
if (n_real_blanklines == 0)
n_real_blanklines = 1;
}
while (--n_real_blanklines >= 0)
putc('\n', output);
n_real_blanklines = 0;
if (parser_state_tos->ind_level == 0)
parser_state_tos->ind_stmt = 0; /* this is a class A kludge. dont do
* additional statement indentation if we are
* at bracket level 0 */
if (e_lab != s_lab || e_code != s_code)
++code_lines; /* keep count of lines with code */
if (e_lab != s_lab) { /* print lab, if any */
if (comment_open) {
comment_open = 0;
fprintf(output, ".*/\n");
}
while (e_lab > s_lab && (e_lab[-1] == ' ' || e_lab[-1] == '\t'))
e_lab--;
cur_col = pad_output(1, compute_label_target());
if (s_lab[0] == '#' && (strncmp(s_lab, "#else", 5) == 0
|| strncmp(s_lab, "#endif", 6) == 0)) {
/* Treat #else and #endif as a special case because any
text after #else or #endif should be converted to
a comment. */
register char *s = s_lab;
if (e_lab[-1] == '\n') e_lab--;
do putc(*s++, output);
while (s < e_lab && 'a' <= *s && *s<='z');
while ((*s == ' ' || *s == '\t') && s < e_lab)
s++;
if (s < e_lab)
fprintf(output, s[0]=='/' && s[1]=='*' ? "\t%.*s" : "\t/* %.*s */",
e_lab - s, s);
}
else fprintf(output, "%.*s", e_lab - s_lab, s_lab);
cur_col = count_spaces(cur_col, s_lab);
}
else
cur_col = 1; /* there is no label section */
parser_state_tos->pcase = false;
if (s_code != e_code) { /* print code section, if any */
register char *p;
if (comment_open) {
comment_open = 0;
fprintf(output, ".*/\n");
}
target_col = compute_code_target();
/* If a line ends in an lparen character, the following
line should not line up with the parenthesis, but
should be indented by the usual amount. */
if (parser_state_tos->last_token == lparen)
{
parser_state_tos->paren_indents[parser_state_tos->p_l_follow-1]
+= ind_size - 1;
}
{
register i;
for (i = 0; i < parser_state_tos->p_l_follow; i++)
if (parser_state_tos->paren_indents[i] >= 0)
parser_state_tos->paren_indents[i] = -(parser_state_tos->paren_indents[i] + target_col);
}
cur_col = pad_output(cur_col, target_col);
for (p = s_code; p < e_code; p++)
if (*p == (char) 0200)
fprintf(output, "%d", target_col * 7);
else
putc(*p, output);
cur_col = count_spaces(cur_col, s_code);
}
if (s_com != e_com)
{
if (troff) {
int all_here = 0;
register char *p;
if (e_com[-1] == '/' && e_com[-2] == '*')
e_com -= 2, all_here++;
while (e_com > s_com && e_com[-1] == ' ')
e_com--;
*e_com = 0;
p = s_com;
while (*p == ' ')
p++;
if (p[0] == '/' && p[1] == '*')
p += 2, all_here++;
else if (p[0] == '*')
p += p[1] == '/' ? 2 : 1;
while (*p == ' ')
p++;
if (*p == 0)
goto inhibit_newline;
if (comment_open < 2 && parser_state_tos->box_com) {
comment_open = 0;
fprintf(output, ".*/\n");
}
if (comment_open == 0) {
if ('a' <= *p && *p <= 'z')
*p = *p + 'A' - 'a';
if (e_com - p < 50 && all_here == 2) {
register char *follow = p;
fprintf(output, "\n.nr C! \\w\1");
while (follow < e_com) {
switch (*follow) {
case '\n':
putc(' ', output);
case 1:
break;
case '\\':
putc('\\', output);
default:
putc(*follow, output);
}
follow++;
}
putc(1, output);
}
fprintf(output, "\n./* %dp %d %dp\n",
parser_state_tos->com_col * 7,
(s_code != e_code || s_lab != e_lab) - parser_state_tos->box_com,
target_col * 7);
}
comment_open = 1 + parser_state_tos->box_com;
while (*p) {
if (*p == BACKSLASH)
putc(BACKSLASH, output);
putc(*p++, output);
}
}
else { /* print comment, if any */
register target = parser_state_tos->com_col;
register char *com_st = s_com;
target += parser_state_tos->comment_delta;
while (*com_st == '\t')
com_st++, target += 8; /* ? */
while (target <= 0)
if (*com_st == ' ')
target++, com_st++;
else if (*com_st == '\t')
target = ((target - 1) & ~7) + 9, com_st++;
else
target = 1;
if (cur_col > target) { /* if comment cant fit on this line,
* put it on next line */
putc('\n', output);
cur_col = 1;
++parser_state_tos->out_lines;
}
while (e_com > com_st && isspace(e_com[-1]))
e_com--;
cur_col = pad_output(cur_col, target);
if (!parser_state_tos->box_com) {
if (star_comment_cont && (com_st[1] != '*' || e_com <= com_st + 1))
if (com_st[1] == ' ' && com_st[0] == ' ' && e_com > com_st + 1)
com_st[1] = '*';
else
fwrite(" * ", com_st[0] == '\t' ? 2 : com_st[0] == '*' ? 1 : 3, 1, output);
}
fwrite(com_st, e_com - com_st, 1, output);
parser_state_tos->comment_delta = parser_state_tos->n_comment_delta;
cur_col = count_spaces(cur_col, com_st);
++parser_state_tos->com_lines; /* count lines with comments */
}
}
if (parser_state_tos->use_ff)
{
putc('\014', output);
parser_state_tos->use_ff = false;
}
else
putc('\n', output);
inhibit_newline:
++parser_state_tos->out_lines;
if (parser_state_tos->just_saw_decl == 1 && blanklines_after_declarations) {
prefix_blankline_requested = 1;
parser_state_tos->just_saw_decl = 0;
}
else
prefix_blankline_requested = postfix_blankline_requested;
postfix_blankline_requested = 0;
}
parser_state_tos->decl_on_line = parser_state_tos->in_decl; /* if we are in the middle of a
* declaration, remember that fact for
* proper comment indentation */
parser_state_tos->ind_stmt = parser_state_tos->in_stmt & ~parser_state_tos->in_decl; /* next line should be
* indented if we have not
* completed this stmt and if
* we are not in the middle of
* a declaration */
parser_state_tos->dumped_decl_indent = 0;
*(e_lab = s_lab) = '\0'; /* reset buffers */
*(e_code = s_code) = '\0';
*(e_com = s_com) = '\0';
parser_state_tos->ind_level = parser_state_tos->i_l_follow;
parser_state_tos->paren_level = parser_state_tos->p_l_follow;
paren_target = -parser_state_tos->paren_indents[parser_state_tos->paren_level - 1];
not_first_line = 1;
return;
}
/* Figure out where we should put the code in codebuf.
Return the column number in spaces. */
int
compute_code_target()
{
register target_col = parser_state_tos->ind_level + 1;
if (parser_state_tos->paren_level)
if (!lineup_to_parens)
target_col += continuation_indent * parser_state_tos->paren_level;
else {
register w;
register t = paren_target;
if ((w = count_spaces(t, s_code) - max_col) > 0
&& count_spaces(target_col, s_code) <= max_col) {
t -= w + 1;
if (t > target_col)
target_col = t;
}
else
target_col = t;
}
else if (parser_state_tos->ind_stmt)
target_col += continuation_indent;
return target_col;
}
int
compute_label_target()
{
return
parser_state_tos->pcase ? case_ind + 1
: *s_lab == '#' ? 1
: parser_state_tos->ind_level - label_offset + 1;
}
/* Allocate space for FILENAME, read in the file, and set in_prog and
in_prog_pos to point to the buffer. If any errors occur, report an
error message and abort. */
void
read_file(filename)
char *filename;
{
/* File descriptor for the input file */
int in_fd;
/* File status for the input file */
struct stat in_stat;
/* buffer used for error messages */
char *errbuf;
errbuf = (char *)xmalloc (strlen (filename) + 80);
sprintf(errbuf,"indent: %s",filename);
in_fd = open(filename,O_RDONLY,0777);
if (in_fd < 0)
{
perror(errbuf);
exit(1);
}
if (fstat(in_fd,&in_stat) < 0)
{
perror(errbuf);
exit(1);
}
in_prog_size = in_stat.st_size;
in_prog = xmalloc(in_prog_size + 3); /* 3 for ' ','\n','\0' */
if (read(in_fd,in_prog,in_prog_size) < 0)
{
perror(errbuf);
exit(1);
}
if (close(in_fd) < 0)
{
perror(errbuf);
exit(1);
}
in_prog[in_prog_size] = ' ';
in_prog[in_prog_size+1] = '\n';
in_prog[in_prog_size+2] = 0;
in_prog_pos = in_prog;
free (errbuf);
}
/* Like read_file but read from stdin. */
void
read_stdin()
{
unsigned int alloc_size = 10000;
int ch;
in_prog_pos = in_prog = xmalloc(alloc_size);
in_prog_size = 0;
do
{
/* Copy up until 3 bytes before the end of the buffer,
(the 3 is for ' \n\0')... */
for (; in_prog_size < alloc_size - 3; in_prog_size++)
{
ch = getc(stdin);
if (ch == EOF)
break;
in_prog[in_prog_size] = ch;
}
/* ...and if that's not enough allocate more. */
if (ch != EOF) {
alloc_size *= 2;
in_prog = xrealloc(in_prog,alloc_size);
}
}
while (ch != EOF);
in_prog[in_prog_size] = ' ';
in_prog[in_prog_size+1] = '\n';
in_prog[in_prog_size+2] = 0;
in_prog_pos = in_prog;
}
/* Advance buf_ptr so that it points to the next line of input. Skip
over indent errors (comments beginning with *INDENT**), ignoring
them. Process INDENT ON and INDENT OFF. (Note: the name of this
function is a historical artifact from before the time that indent
kept the whole source file in memory). */
fill_buffer()
{
/* Point various places in the buffer. */
char *p;
/* Have we found INDENT ON or INDENT OFF ? */
enum {None,Indent_on,Indent_off} com;
if (bp_save != 0)
{ /* there is a partly filled input buffer left */
buf_ptr = bp_save; /* dont read anything, just switch buffers */
buf_end = be_save;
bp_save = be_save = 0;
if (buf_ptr < buf_end)
return; /* only return if there is really something in
* this buffer */
}
fill_it:
cur_line = in_prog_pos;
buf_ptr = in_prog_pos;
for (p = buf_ptr; *p && *p++ != '\n';)
;
buf_end = p;
if (!*p)
had_eof = true;
p = buf_ptr;
in_prog_pos = buf_end;
while (*p == ' ' || *p == '\t')
p++;
if (*p == '/' && p[1] == '*')
{
p += 2;
if (p[1] == 'I' && strncmp(p,"*INDENT**",9) == 0)
goto fill_it;
while (*p == ' ' || *p == '\t')
p++;
com = None;
if (p[0] == 'I' && p[1] == 'N' && p[2] == 'D' && p[3] == 'E'
&& p[4] == 'N' && p[5] == 'T') {
p += 6;
while (*p == ' ' || *p == '\t')
p++;
if (*p == '*')
com = Indent_on;
else if (*p == 'O')
if (*++p == 'N')
p++, com = Indent_on;
else if (*p == 'F' && *++p == 'F')
p++, com = Indent_off;
while (*p == ' ' || *p == '\t')
p++;
if (p[0] == '*' && p[1] == '/' && p[2] == '\n' && com) {
if (s_com != e_com || s_lab != e_lab || s_code != e_code)
dump_line();
if (!(inhibit_formatting = (int)com - 1)) {
n_real_blanklines = 0;
postfix_blankline_requested = 0;
prefix_blankline_requested = 0;
suppress_blanklines = 1;
}
}
}
}
if (inhibit_formatting)
{
p = buf_ptr;
do
putc(*p,output);
while (*p++ != '\n');
}
}
/*
* Copyright (C) 1976 by the Board of Trustees of the University of Illinois
*
* All rights reserved
*
*
* NAME: pad_output
*
* FUNCTION: Writes tabs and spaces to move the current column up to the desired
* position.
*
* ALGORITHM: Put tabs and/or blanks into pobuf, then write pobuf.
*
* PARAMETERS: current integer The current column target
* nteger The desired column
*
* RETURNS: Integer value of the new column. (If current >= target, no action is
* taken, and current is returned.
*
* GLOBALS: None
*
* CALLS: write (sys)
*
* CALLED BY: dump_line
*
* HISTORY: initial coding November 1976 D A Willcox of CAC
*
*/
pad_output(current, target) /* writes tabs and blanks (if necessary) to
* get the current output position up to the
* target column */
int current; /* the current column value */
int target; /* position we want it at */
{
register int curr; /* internal column pointer */
register int tcur;
if (troff)
fprintf(output, "\\h'|%dp'", (target - 1) * 7);
else {
if (current >= target)
return (current); /* line is already long enough */
curr = current;
while ((tcur = ((curr - 1) & tabmask) + tabsize + 1) <= target) {
putc('\t', output);
curr = tcur;
}
while (curr++ < target)
putc(' ', output); /* pad with final blanks */
}
return (target);
}
/*
* Copyright (C) 1976 by the Board of Trustees of the University of Illinois
*
* All rights reserved
*
*
* NAME: count_spaces
*
* FUNCTION: Find out where printing of a given string will leave the current
* character position on output.
*
* ALGORITHM: Run thru input string and add appropriate values to current
* position.
*
* RETURNS: Integer value of position after printing "buffer" starting in column
* "current".
*
* HISTORY: initial coding November 1976 D A Willcox of CAC
*
*/
int
count_spaces(current, buffer)
/*
* this routine figures out where the character position will be after
* printing the text in buffer starting at column "current"
*/
int current;
char *buffer;
{
register char *buf; /* used to look thru buffer */
register int cur; /* current character counter */
cur = current;
for (buf = buffer; *buf != '\0'; ++buf) {
switch (*buf) {
case '\n':
case 014: /* form feed */
cur = 1;
break;
case '\t':
cur = ((cur - 1) & tabmask) + tabsize + 1;
break;
case 010: /* backspace */
--cur;
break;
default:
++cur;
break;
} /* end of switch */
} /* end of for loop */
return (cur);
}
/* Nonzero if we have found an error (not a warning). */
int found_err;
/* Signal an error. LEVEL is nonzero if it is an error (as opposed to
a warning. MSG is a printf-style format string. Additional
arguments are additional arguments for printf. */
/* VARARGS2 */
diag(level, msg, a, b)
char *msg;
{
if (level)
found_err = 1;
if (output == stdout) {
fprintf(stdout, "/**INDENT** %s@%d: ", level == 0 ? "Warning" : "Error", line_no);
fprintf(stdout, msg, a, b);
fprintf(stdout, " */\n");
}
else {
fprintf(stderr, "%s: %d: ", in_name, line_no);
fprintf(stderr, msg, a, b);
fprintf(stderr, "\n");
}
}
writefdef(f, nm)
register struct fstate *f;
{
fprintf(output, ".ds f%c %s\n.nr s%c %d\n",
nm, f->font, nm, f->size);
}
/* Write characters starting at S to change the font from OF to NF. Return
a pointer to the character after the last character written.
For troff mode only. */
char *
chfont(of, nf, s)
register struct fstate *of,
*nf;
char *s;
{
if (of->font[0] != nf->font[0]
|| of->font[1] != nf->font[1]) {
*s++ = '\\';
*s++ = 'f';
if (nf->font[1]) {
*s++ = '(';
*s++ = nf->font[0];
*s++ = nf->font[1];
}
else
*s++ = nf->font[0];
}
if (nf->size != of->size) {
*s++ = '\\';
*s++ = 's';
if (nf->size < of->size) {
*s++ = '-';
*s++ = '0' + of->size - nf->size;
}
else {
*s++ = '+';
*s++ = '0' + nf->size - of->size;
}
}
return s;
}
parsefont(f, s0)
register struct fstate *f;
char *s0;
{
register char *s = s0;
int sizedelta = 0;
int i;
f->size = 0;
f->allcaps = 1;
for (i = 0; i < 4; i++)
f->font[i] = 0;
while (*s) {
if (isdigit(*s))
f->size = f->size * 10 + *s - '0';
else if (isupper(*s))
if (f->font[0])
f->font[1] = *s;
else
f->font[0] = *s;
else if (*s == 'c')
f->allcaps = 1;
else if (*s == '+')
sizedelta++;
else if (*s == '-')
sizedelta--;
else {
fprintf(stderr, "indent: bad font specification: %s\n", s0);
exit(1);
}
s++;
}
if (f->font[0] == 0)
f->font[0] = 'R';
if (bodyf.size == 0)
bodyf.size = 11;
if (f->size == 0)
f->size = bodyf.size + sizedelta;
else if (sizedelta > 0)
f->size += bodyf.size;
else
f->size = bodyf.size - f->size;
}