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psgrind.lha
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pfontedp.c
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1993-04-09
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/* pfontedpr - general purpose "pretty printer".
*
* This version is a hacked up version of tfontedpr.c as obtained from
* the following people
*
* 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. Please
* mail them to:
* van@lbl-rtsg.arpa (from arpanet, milnet, csnet, etc.)
* ..!ucbvax!lbl-csam!van (from Usenet/UUCP)
*
* Modifications.
* --------------
* 8Apr93 Dylan McNamee (dylan@cs.washington.edu)
* Modernized the code. Now passes ANSI without warnings.
* 30Mar85 Chris & Van: Fixed "\C" & "\S" (comment & string start indicators)
* to really appear at the start of comments & strings.
* Changes for speeded-up expmatch.
* 29Mar85 Chris Torek (chris@maryland): Bug fixes for '~' and '^L'
* output. Most cpu-time eaters recoded to improve
* efficiency.
* 10Feb85 Van Written.
*/
#include <stdio.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#ifdef MSDOS
extern char *asctime();
#else
#include <sys/types.h>
#include <sys/stat.h>
#endif
#define DBUFSIZ 2048
#define boolean int
#define TRUE 1
#define FALSE 0
#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(char *, char *, char **, char *);
/* match a string to an expression */
char *convexp(char *); /* convert expression to internal form */
char *tgetstr();
void putstr(char *cp);
int tgetent(char *, char *, char *);
char *tgetstr(char *, char **);
int tgetflag(char *);
void sinitfile(void);
void outchar(char c);
int outpsstring(char *);
void putKcp(char *, char *, boolean);
void putScp(char *);
boolean isproc(char *);
int width(char *, char *);
int iskw(char *);
int modechange(int);
void charmode(void);
/*
* The state variables
*/
#define _SMODE 1
#define _SHMODE 2
#define _KMODE 3
#define _CMODE 4
#define _NMODE 5
boolean incomm; /* in a comment of the primary type */
boolean instr; /* in a string constant */
boolean inchr; /* in a string constant */
boolean nokeyw = FALSE; /* no keywords being flagged */
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 */
char *defsfile = {DEFSFILE}; /* name of language definitions file */
char pname[DBUFSIZ+1];
/*
* The language specific globals
*/
char *language = "c"; /* the language indicator */
char *l_keywds[DBUFSIZ/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 */
int charmflag,reallnum,outlnum,procout;
char *ignoredef; /* if set ignore this define */
int inignore,wide; /* if set do wide printout */
/*
* global variables also used by expmatch
*/
extern boolean rescaped; /* if last character was an escape */
extern char *rstart; /* start of the current string */
int (*re_strncmp)(const char *, const char *, size_t);
/* function to do string compares */
extern int strncmp();
extern int lc_strncmp();
/*
* 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", "\\{", "\\|", "\\}", "\\~", "\\^?",
};
/* Output a character, with translation. Avoid side effects with this
macro! */
/*
* 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(" %d @TAB\n", col);
void
sinitfile() /* send the init file to output */
{
char cc;
FILE *fptr;
if( !(fptr = fopen(INITFILE,"r"))) {
fprintf(stderr,"Can't open init file (%s)\n",INITFILE);
exit(1);
}
while( (cc = getc(fptr)) != -1) putchar(cc);
fclose(fptr);
}
void
outchar(cc) /* output the char */
char cc;
{
if((cc == '(') || (cc == ')') || (cc == '\\'))
putchar('\\');
if(cc == '\n') {
outlnum++;
modechange(0);
if(!(outlnum % 10) && !procout) {
printf(" (%d) @N ",reallnum);
if(incomm)
printf("@C ");
}
procout = 0;
printf("@NL");
}
putchar(cc);
}
int
outpsstring(what) /* output a postscript string */
char *what;
{
char cc;
int len,x;
len = strlen(what);
printf(" (");
for(x=0; x < len; x++) {
cc = *(what + x);
if( (cc == '(') || (cc == ')') || (cc == '\\'))
putchar('\\');
putchar(cc);
}
printf(") ");
return(0);
}
int
modechange(type) /* purge the current string if any */
int type; /* close out the mode string */
{
static int oldtype;
if(charmflag) {
switch (oldtype) {
case _SMODE :
printf(") @S\n");
break;
case _SHMODE :
printf(") @SH\n");
break;
case _KMODE :
printf(") @K\n");
break;
case _CMODE :
printf(") @C\n");
break;
case _NMODE :
printf(") @N\n");
break;
default :;
} /* end switch */
} /* end if */
if(type)
oldtype = type;
charmflag = 0;
return(0);
}
void
charmode() /* begin char mode */
{
if(!charmflag) {
printf(" (");
charmflag = -1;
}
}
main(argc, argv)
int argc;
char *argv[];
{
char *fname = "", *p;
char buf[DBUFSIZ];
char strings[2 * DBUFSIZ];
char defs[2 * DBUFSIZ];
#ifdef MSDOS
struct tm *tmstr;
#else
struct stat stbuf;
#endif
FILE *realfptr;
int twomode;
twomode=0;
realfptr = stdin;
sinitfile(); /* send the init file */
argc--, argv++;
do {
register char *cp;
register int i;
if (argc > 0) {
if (!strcmp(argv[0], "-h")) {
if (argc == 1) {
printf("() @Head\n");
argc--; argv++;
goto rest;
}
putstr( argv[1] );
printf( "@Head \n" );
argc--, argv++;
argc--, argv++;
if (argc > 0)
continue;
goto rest;
}
/* check for ignore def */
if(!strcmp(argv[0],"-id")) {
ignoredef = argv[1];
argc--; argv++;
argc--; argv++;
continue;
}
/* -wide for wide 132 column printouts */
if(!strcmp(argv[0],"-wide")) {
wide = -1;
argc--; argv++;
continue;
}
/* -2 2 pages per physical page */
if(!strcmp(argv[0],"-2")) {
twomode = -1;
argc--; argv++;
continue;
}
/* take input from the standard place */
if (!strcmp(argv[0], "-")) {
argc = 0;
realfptr = stdin;
goto rest;
}
/* indicate no keywords */
if (!strcmp(argv[0], "-n")) {
nokeyw++;
argc--, argv++;
continue;
}
/* specify the language */
if (!strncmp(argv[0], "-l", 2)) {
language = argv[0]+2;
argc--, argv++;
continue;
}
/* specify the language description file */
if (!strncmp(argv[0], "-d", 2)) {
defsfile = argv[1];
argc--, argv++;
argc--, argv++;
continue;
}
/* open the file for input */
if ((realfptr = fopen(argv[0], "r")) == NULL) {
fprintf(stderr,"Error: fopen\n");
exit(1);
}
fname = argv[0];
argc--, argv++;
}
rest:
/*
* get the language definition from the defs file
*/
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 vgrindefs file %s\n", defsfile);
exit (0);
}
p = strings;
if (tgetstr ("kw", &p) == NIL)
nokeyw = TRUE;
else {
char **cpp;
cpp = l_keywds;
cp = strings;
while (*cp) {
while (*cp == ' ' || *cp =='\t')
*cp++ = NULL;
if (*cp)
*cpp++ = cp;
while (*cp != ' ' && *cp != '\t' && *cp)
cp++;
}
*cpp = NIL;
}
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;
rescaped = FALSE;
blklevel = 0;
for (psptr=0; psptr<PSMAX; psptr++) {
pstack[psptr][0] = NULL;
plstack[psptr] = 0;
}
psptr = -1;
#ifndef MSDOS
#ifdef AMIGA
/* SAS's libraries don't return the current date if you
* ask for the modification date of stdin...
*/
time(&stbuf.st_mtime);
cp = ctime(&stbuf.st_mtime);
#else
fstat(fileno(stdin), &stbuf);
cp = ctime(&stbuf.st_mtime);
#endif /* Amiga */
#else
cp = asctime(tmstr = localtim(NULL));
#endif
cp[10] = '\0';
cp[16] = '\0';
cp[24] = '\0';
putstr(fname);
putstr(cp+11);
sprintf(buf,"%s %s",cp+4,cp+20);
putstr(buf);
printf("@FILE \n");
if(twomode)
printf("@DO2\n"); /* order here is important */
if(wide)
printf("@WIDE \n"); /* must come after @DO2 */
printf("@NEWPAGE\n"); /* force the page setup */
/*
* MAIN LOOP!!!
*/
outlnum = reallnum = 0;
modechange(_SHMODE); /* set the show mode */
while (1) {
fgets(buf, sizeof buf, realfptr);
if(feof(realfptr)) {
fclose(realfptr);
break;
}
reallnum++;
if(ignoredef) {
if(inignore) {
if(!strncmp(buf,"#endif",6))
inignore = 0;
continue;
}
if(!(strncmp(buf,"#ifdef",6))) {
#ifdef DEBUG
fprintf(stderr,"Examining (%s)\n",buf+strlen(buf)-strlen(ignoredef)-1);
#endif
if(!(strncmp(buf+strlen(buf)-strlen(ignoredef)-1,
ignoredef,strlen(ignoredef)))) {
inignore = -1;
continue;
}
}
}
cp = buf;
if (*cp == '\f') {
printf("@NEXTPAGE \n");
cp++;
if (*cp == '\n')/* some people like ^Ls on their own line */
continue;
}
prccont = FALSE;
putScp(cp);
if (prccont && (psptr >= 0)) {
putstr(pstack[psptr]);
printf("@PROCC\n");
procout = -1;
}
#ifdef DEBUG
fprintf (stderr,"com %o str %o chr %o ptr %d\n", incomm, instr, inchr, psptr);
#endif
}
if(argc <= 0) break;
printf("@FLUSHPAGE\n");
} while (argc > 0);
printf("@FLUSHPAGE\n%c",4);
exit(0);
}
#define isidchr(c) (isalnum(c) || (c) == '_')
void
putScp(os)
char *os;
{
register char *s; /* 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 */
#ifdef DEBUG
fprintf(stderr,"PutScp %s\n",os);
#endif
s = os;
rstart = os; /* remember the start for expmatch */
rescaped = FALSE;
if (nokeyw || incomm || instr)
goto skip;
if (isproc(s)) {
modechange(0);
putstr(pname);
printf("@PROC\n");
procout = -1;
if (psptr < PSMAX) {
++psptr;
strncpy (pstack[psptr], pname, PNAMELEN);
pstack[psptr][PNAMELEN] = NULL;
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);
modechange(0);
printf("@C\n");
modechange(_SHMODE);
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);
modechange(0);
printf("@C\n");
modechange(_SHMODE);
s = acmendptr;
putKcp (acmptr, acmendptr, 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);
modechange(_SMODE);
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);
modechange(_SMODE);
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;
modechange(0);
printf(" @CE\n");
modechange(_SHMODE);
} 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;
modechange(_SHMODE);
} 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;
modechange(_SHMODE);
} 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(start, end, 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++;
modechange(0);
tabto(width(rstart, start));
continue;
}
if (!nix && (c == '#' || isidchr(c))) {/* potential keyword */
start--;
if (start == rstart || !isidchr(start[-1])) {
i = iskw(start);
if (i > 0) {
modechange(_KMODE);
printf(" (");
charmflag = -1;
while (--i >= 0) {
c = *start++;
outchar(c);
}
modechange(_SHMODE);
continue;
}
}
start++;
}
charmode();
outchar(c);
}
}
int
width(s, os)
register char *s, *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(cp)
register char *cp;
{
outpsstring(cp);
}
/*
* look for a process beginning on this line
*/
boolean
isproc(s)
char *s;
{
pname[0] = NULL;
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(s)
register 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);
}