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tgrind.lha
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TGrind
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tfontedpr.c
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1993-01-04
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#ifndef lint
static char rcsid[] =
"$Header: tfontedpr.c,v 1.3 88/07/05 05:15:52 van Exp $ (LBL)";
#endif
/*
* tfontedpr - general purpose "pretty printer" for use with TeX.
*
* Copyright (C) 1985 by Van Jacobson, Lawrence Berkeley Laboratory. This
* program may be freely used and copied but may not be sold without the
* author's written permission. This notice must remain in any copy or
* derivative.
*
* This program is used as part of the "tgrind" shell script. It converts
* program source file(s) to TeX input files.
*
* This program is an adaptation of "vfontedpr" v4.2 (12/11/84) from the 4.2bsd
* Unix distribution. Vfontedpr was written by Dave Presotto (based on an
* earlier program of the same name written by Bill Joy).
*
* I would welcome comments, enhancements, bug fixes, etc.
* van@lbl-csam.arpa (from arpanet, milnet, csnet, etc.)
* ..!ucbvax!lbl-csam!van (from Usenet/UUCP)
*/
/**
** Amiga port by Kari Sutela, University of Turku.
**/
#include <ctype.h>
#include <stdio.h>
#include <sys/types.h>
#include <stat.h>
#include <string.h>
#include <stdlib.h>
#include <time.h>
#include "regexp_protos.h"
#include "vgrindefs_protos.h"
void putScp(char * );
void putKcp(char * , char * , int );
int width(char * , char * );
void putstr(char * );
int isproc(char * );
int iskw(char * );
#ifndef boolean
#define boolean int
#define TRUE 1
#define FALSE 0
#endif
#define NIL 0
#define STANDARD 0
#define ALTERNATE 1
#define STRLEN 10 /* length of strings introducing things */
#define PNAMELEN 80 /* length of a function/procedure name */
#define PSMAX 20 /* size of procedure name stacking */
/* regular expression routines */
char *expmatch (); /* match a string to an expression */
char *convexp (); /* convert expression to internal form */
char *tgetstr ();
boolean isproc ();
char *ctime ();
/*
* The state variables
*/
boolean incomm; /* in a comment of the primary type */
boolean instr; /* in a string constant */
boolean inchr; /* in a string constant */
boolean nokeyw; /* no keywords being flagged */
boolean filtermode; /* our output won't go straight to tex */
boolean prccont; /* continue last procedure */
int comtype; /* type of comment */
int psptr; /* the stack index of the current procedure */
char pstack[PSMAX][PNAMELEN+1]; /* the procedure name stack */
int plstack[PSMAX]; /* the procedure nesting level stack */
int blklevel; /* current nesting level */
#ifndef DEFSFILE
char *defsfile = "tex:inputs/tgrindefs"; /* name of language definitions file */
#else
char *defsfile = DEFSFILE;
#endif
char pname[BUFSIZ + 1];
/*
* language specific globals
*/
char *language = "c"; /* the language indicator */
char *l_keywds[BUFSIZ / 2]; /* keyword table address */
char *l_prcbeg; /* regular expr for procedure begin */
char *l_combeg; /* string introducing a comment */
char *l_comend; /* string ending a comment */
char *l_acmbeg; /* string introducing a comment */
char *l_acmend; /* string ending a comment */
char *l_blkbeg; /* string begining of a block */
char *l_blkend; /* string ending a block */
char *l_strbeg; /* delimiter for string constant */
char *l_strend; /* delimiter for string constant */
char *l_chrbeg; /* delimiter for character constant */
char *l_chrend; /* delimiter for character constant */
char l_escape; /* character used to escape characters */
boolean l_toplex; /* procedures only defined at top lex level */
boolean l_onecase; /* upper & lower case equivalent */
/*
* global variables also used by expmatch
*/
extern boolean _escaped; /* if last character was an escape */
extern char *_start; /* start of the current string */
int (*re_strncmp) (char *, char *, size_t); /* function to do string compares */
/*
* The following table converts ASCII characters to a printed representation,
* taking care of all the TeX quoting. N.B.: all single-character strings
* are assumed to be equivalent to the character for that index (i.e.,
* printtab['c'] can't be "f"). (This is purely for efficiency hacking.)
*/
char *printtab[128] = {
"\0x", "\\^A", "\\^B", "\\^C", "\\^D", "\\^E", "\\^F", "\\^G",
"\\^H", "\t", "}}\n", "\\^K", "\0x", "\\^M", "\\^N", "\\^O",
"\\^P", "\\^Q", "\\^R", "\\^S", "\\^T", "\\^U", "\\^V", "\\^W",
"\\^X", "\\^Y", "\\^Z", "\\^[", "\\^\\!", "\\^]", "\\^\\^", "\\^_",
" ", "!", "\\\"", "\\#", "\\$", "\\%", "\\&", "\\'",
"(", ")", "\\*", "+", ",", "\\-", ".", "\\/",
"0", "1", "2", "3", "4", "5", "6", "7",
"8", "9", ":", ";", "\\<", "=", "\\>", "?",
"@", "A", "B", "C", "D", "E", "F", "G",
"H", "I", "J", "K", "L", "M", "N", "O",
"P", "Q", "R", "S", "T", "U", "V", "W",
"X", "Y", "Z", "[", "\\!", "]", "\\^", "\\_",
"`", "a", "b", "c", "d", "e", "f", "g",
"h", "i", "j", "k", "l", "m", "n", "o",
"p", "q", "r", "s", "t", "u", "v", "w",
"x", "y", "z", "\\{", "\\|", "\\}", "\\~", "\\^?",
};
/*
* The following table tells what characters a legal in identifiers
* and keywords. We build it from the list of keywords and the
* id= string.
*/
static char *IDChar[256];
#define isIDchr(c) (IDChar[(unsigned)(c)])
/*
* Output a character, with translation. Avoid side effects with this macro!
*/
#define outchar(c) ((c >= 0 && c < 128) ? \
(printtab[c][1] ? printf("%s", printtab[c]) : putchar(c)) : \
putchar(c) )
/*
* Output a TeX command to tab to column "col" (see tgrindmac.tex for a
* partial explanation of the bizarre brace arrangement).
*/
#define tabto(col) printf("}\\Tab{%d}{", col);
int main (int argc, char *argv[])
{
char *fname = "", *p;
struct stat stbuf;
char buf[BUFSIZ];
char strings[2 * BUFSIZ];
char defs[2 * BUFSIZ];
register char *cp;
register int i;
int newlang = 1;
int first = 1;
while (--argc > 0) {
++argv;
if (argv[0][0] == '-' && argv[0][1]) {
if (!strcmp (argv[0], "-h")) {
if (argc == 1) {
printf ("\\Head{}\n");
}
else {
argc--, argv++;
printf ("\\Head{");
putstr (argv[0]);
printf ("}\n");
}
}
/* take input from the standard place */
else if (!strcmp (argv[0], "-")) {
}
/* we're operating as a filter */
else if (!strcmp (argv[0], "-f")) {
filtermode++;
}
/* indicate no keywords */
else if (!strcmp (argv[0], "-n")) {
nokeyw++;
}
/* specify the language */
else if (!strncmp (argv[0], "-l", 2)) {
if (argv[0][2])
language = argv[0] + 2;
else {
if (argc == 1) {
fprintf (stderr,
"language name must follow -l\n");
exit (1);
}
argc--, argv++;
language = argv[0];
}
newlang = 1;
}
/* specify the language description file */
else if (!strncmp (argv[0], "-d", 2)) {
if (argv[0][2])
defsfile = argv[0] + 2;
else {
if (argc == 1) {
fprintf (stderr,
"descr. file name must follow -d\n");
exit (1);
}
argc--, argv++;
defsfile = argv[0];
}
newlang = 1;
}
continue;
}
/* here to do another file */
if (argv[0][0] != '-') {
/* open the file for input */
if (freopen (argv[0], "r", stdin) == NULL) {
perror (argv[0]);
exit (1);
}
fname = argv[0];
}
if (first && ! filtermode) {
printf ("\\input tgrindmac\n");
first = 0;
}
/*
* get the language definition from the defs file
*/
if (newlang) {
i = tgetent (defs, language, defsfile);
if (i == 0) {
fprintf (stderr, "no entry for language %s\n",
language);
exit (0);
} else if (i < 0) {
fprintf (stderr,
"cannot find tgrindefs file %s\n",
defsfile);
exit (0);
}
p = strings;
if (tgetstr ("kw", &p) == NIL)
nokeyw = TRUE;
else {
char **cpp;
cpp = l_keywds;
cp = strings;
while (i = *cp) {
while (*cp == ' ' || *cp == '\t')
/* was: *cp++ = NULL; */
*cp++ = '\0';
if (*cp)
*cpp++ = cp;
while ((i = *cp) && i != ' '
&& i != '\t') {
++cp;
if (! IDChar[i])
++IDChar[i];
}
}
*cpp = NIL;
}
p = buf;
if (tgetstr ("id", &p)) {
for (cp = buf; i = *cp++;)
if (! IDChar[i])
++IDChar[i];
}
else {
/* default to C identifiers */
for (i = 'A'; i <= 'Z'; ++i)
++IDChar[i];
for (i = 'a'; i <= 'z'; ++i)
++IDChar[i];
for (i = '0'; i <= '9'; ++i)
++IDChar[i];
++IDChar['_'];
}
p = buf;
l_prcbeg = convexp (tgetstr ("pb", &p));
p = buf;
l_combeg = convexp (tgetstr ("cb", &p));
p = buf;
l_comend = convexp (tgetstr ("ce", &p));
p = buf;
l_acmbeg = convexp (tgetstr ("ab", &p));
p = buf;
l_acmend = convexp (tgetstr ("ae", &p));
p = buf;
l_strbeg = convexp (tgetstr ("sb", &p));
p = buf;
l_strend = convexp (tgetstr ("se", &p));
p = buf;
l_blkbeg = convexp (tgetstr ("bb", &p));
p = buf;
l_blkend = convexp (tgetstr ("be", &p));
p = buf;
l_chrbeg = convexp (tgetstr ("lb", &p));
p = buf;
l_chrend = convexp (tgetstr ("le", &p));
l_escape = '\\';
l_onecase = tgetflag ("oc");
if (l_onecase)
re_strncmp = lc_strncmp;
else
re_strncmp = strncmp;
l_toplex = tgetflag ("tl");
}
/* initialize the program */
incomm = FALSE;
instr = FALSE;
inchr = FALSE;
_escaped = FALSE;
blklevel = 0;
for (psptr = 0; psptr < PSMAX; psptr++) {
/* was: pstack[psptr][0] = NULL; */
pstack[psptr][0] = '\0';
plstack[psptr] = 0;
}
psptr = -1;
#ifdef OLDAMIGA
{
long ft;
ft = getft(fname);
cp = ctime(&ft);
}
#else
fstat (fileno (stdin), &stbuf);
/* Not needed: stat(fname,&stbuf); */
cp = ctime (&stbuf.st_mtime);
#endif
cp[10] = '\0';
cp[16] = '\0';
cp[24] = '\0';
printf ("\\File{");
putstr (fname);
printf ("},{%s},{%s %s}\n", cp + 11, cp + 4, cp + 20);
/*
* MAIN LOOP!!!
*/
while (fgets (buf, sizeof buf, stdin) != NULL) {
cp = buf;
if (*cp == '\f') {
printf ("\\NewPage\n");
cp++;
/* some people like ^Ls on their own line */
if (*cp == '\n')
continue;
}
prccont = FALSE;
printf ("\\L{\\LB{");
putScp (cp);
if (prccont && (psptr >= 0)) {
printf ("\\ProcCont{");
putstr (pstack[psptr]);
printf ("}");
}
}
}
if (! filtermode)
printf ("\\vfill\\eject\\end\n");
exit (0);
}
void putScp (char *os)
{
register char *s = os; /* pointer to unmatched string */
char *comptr; /* start of a comment delimiter */
char *comendptr; /* end of a comment delimiter */
char *acmptr; /* start of an alt. comment delimiter */
char *acmendptr; /* end of an alt. comment delimiter */
char *strptr; /* start of a string delimiter */
char *strendptr; /* end of a string delimiter */
char *chrptr; /* start of a char. const delimiter */
char *chrendptr; /* end of a char. const delimiter */
char *blksptr; /* start of a lexical block start */
char *blksendptr; /* end of a lexical block start */
char *blkeptr; /* start of a lexical block end */
char *blkeendptr; /* end of a lexical block end */
_start = os; /* remember the start for expmatch */
_escaped = FALSE;
if (nokeyw || incomm || instr)
goto skip;
if (isproc (s)) {
printf ("\\Proc{");
putstr (pname);
printf ("}");
if (!l_toplex && psptr < PSMAX - 1) {
++psptr;
strncpy (pstack[psptr], pname, PNAMELEN);
/* was: pstack[psptr][PNAMELEN] = NULL; */
pstack[psptr][PNAMELEN] = '\0';
plstack[psptr] = blklevel;
}
}
skip:
do {
/* check for string, comment, blockstart, etc */
if (!incomm && !instr && !inchr) {
blkeendptr = expmatch (s, l_blkend, &blkeptr, NIL);
blksendptr = expmatch (s, l_blkbeg, &blksptr, NIL);
comendptr = expmatch (s, l_combeg, &comptr, NIL);
acmendptr = expmatch (s, l_acmbeg, &acmptr, NIL);
strendptr = expmatch (s, l_strbeg, &strptr, NIL);
chrendptr = expmatch (s, l_chrbeg, &chrptr, NIL);
/* start of a comment? */
if (comptr != NIL
&& (strptr == NIL || comptr < strptr)
&& (acmptr == NIL || comptr < acmptr)
&& (chrptr == NIL || comptr < chrptr)
&& (blksptr == NIL || comptr < blksptr)
&& (blkeptr == NIL || comptr < blkeptr)) {
putKcp (s, comptr - 1, FALSE);
printf ("\\C{}");
s = comendptr;
putKcp (comptr, comendptr - 1, FALSE);
incomm = TRUE;
comtype = STANDARD;
continue;
}
/* start of an alternate-form comment? */
if (acmptr != NIL
&& (strptr == NIL || acmptr < strptr)
&& (chrptr == NIL || acmptr < chrptr)
&& (blksptr == NIL || acmptr < blksptr)
&& (blkeptr == NIL || acmptr < blkeptr)) {
putKcp (s, acmptr - 1, FALSE);
printf ("\\C{}");
s = acmendptr;
putKcp (acmptr, acmendptr - 1, FALSE);
incomm = TRUE;
comtype = ALTERNATE;
continue;
}
/* start of a string? */
if (strptr != NIL
&& (chrptr == NIL || strptr < chrptr)
&& (blksptr == NIL || strptr < blksptr)
&& (blkeptr == NIL || strptr < blkeptr)) {
putKcp (s, strptr - 1, FALSE);
printf ("\\S{}");
s = strendptr;
putKcp (strptr, strendptr - 1, FALSE);
instr = TRUE;
continue;
}
/* start of a character string? */
if (chrptr != NIL
&& (blksptr == NIL || chrptr < blksptr)
&& (blkeptr == NIL || chrptr < blkeptr)) {
putKcp (s, chrptr - 1, FALSE);
printf ("\\S{}");
s = chrendptr;
putKcp (chrptr, chrendptr - 1, FALSE);
inchr = TRUE;
continue;
}
/* end of a lexical block */
if (blkeptr != NIL) {
if (blksptr == NIL || blkeptr < blksptr) {
putKcp (s, blkeendptr - 1, FALSE);
s = blkeendptr;
blklevel--;
if (psptr >= 0 &&
plstack[psptr] >= blklevel) {
/* end of current procedure */
blklevel = plstack[psptr];
/*
* see if we should print the
* last proc name
*/
if (--psptr >= 0)
prccont = TRUE;
else
psptr = -1;
}
continue;
}
}
/* start of a lexical block */
if (blksptr != NIL) {
putKcp (s, blksendptr - 1, FALSE);
s = blksendptr;
blklevel++;
continue;
}
/* check for end of comment */
} else if (incomm) {
if ((comendptr = expmatch (s,
comtype == STANDARD ? l_comend : l_acmend,
NIL, NIL)) != NIL) {
putKcp (s, comendptr - 1, TRUE);
s = comendptr;
incomm = FALSE;
printf ("\\CE{}");
} else {
comptr = s;
s += strlen (s);
putKcp (comptr, s - 1, TRUE);
}
continue;
/* check for end of string */
} else if (instr) {
if ((strendptr = expmatch (s, l_strend, NIL, NIL))
!= NIL) {
putKcp (s, strendptr - 1, TRUE);
s = strendptr;
instr = FALSE;
printf ("\\SE{}");
} else {
strptr = s;
s += strlen (s);
putKcp (strptr, s - 1, TRUE);
}
continue;
/* check for end of character string */
} else if (inchr) {
if ((chrendptr = expmatch (s, l_chrend, NIL, NIL)) != NIL) {
putKcp (s, chrendptr - 1, TRUE);
s = chrendptr;
inchr = FALSE;
printf ("\\SE{}");
} else {
chrptr = s;
s += strlen (s);
putKcp (chrptr, s - 1, TRUE);
}
continue;
}
/* print out the line */
chrptr = s;
s += strlen (s);
putKcp (chrptr, s - 1, FALSE);
} while (*s);
}
void putKcp (char *start, char *end, boolean nix)
/* register char *start; start of string to write */
/* register char *end; end of string to write */
/* register boolean nix; true if we should force nokeyw */
{
register int i, c;
if (nokeyw)
nix = TRUE;
while (start <= end) {
c = *start++;
/* take care of nice tab stops */
if (c == '\t') {
while (start <= end && *start == '\t')
start++;
tabto (width (_start, start));
continue;
}
if (!nix && isIDchr(c)) {
/* potential keyword */
start--;
if (start == _start || !isIDchr(start[-1])) {
i = iskw (start);
if (i > 0) {
printf ("\\K{");
while (--i >= 0) {
c = *start++;
outchar (c);
}
putchar ('}');
continue;
}
}
start++;
}
outchar (c);
}
}
int width (char *s, char *os)
{
register int i = 0, c;
while (s < os) {
c = *s++;
if (c == '\t') {
i = (i + 8) & ~7;
continue;
}
if (c < ' ')
i += 2;
else
i++;
}
return (i);
}
/* output a string, escaping special characters */
void putstr (char *cp)
{
register int c;
if (cp == NULL)
return;
while ((c = *cp++) != 0)
outchar (c);
}
/*
* look for a process beginning on this line
*/
boolean isproc (char *s)
{
/* was: pname[0] = NULL; */
pname[0] = '\0';
if ((!l_toplex || blklevel == 0)
&& expmatch (s, l_prcbeg, NIL, pname) != NIL)
return (TRUE);
return (FALSE);
}
/*
* iskw - check to see if the next word is a keyword
*/
int iskw (char *s)
{
register char **ss = l_keywds;
register int i = 1;
register char *cp = s;
register int firstc = *s;
while (++cp, isIDchr(*cp))
i++;
while (cp = *ss++) {
if (!l_onecase && firstc != *cp)
continue;
if ((*re_strncmp) (s, cp, i) == 0 && !isIDchr(cp[i]))
return (i);
}
return (0);
}