427 lines
11 KiB
C
427 lines
11 KiB
C
/*-
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Ozan Yigit at York University.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#ifndef lint
|
|
static const char copyright[] =
|
|
"@(#) Copyright (c) 1989, 1993\n\
|
|
The Regents of the University of California. All rights reserved.\n";
|
|
#endif /* not lint */
|
|
|
|
#ifndef lint
|
|
#if 0
|
|
static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93";
|
|
#endif
|
|
static const char rcsid[] =
|
|
"$FreeBSD$";
|
|
#endif /* not lint */
|
|
|
|
/*
|
|
* main.c
|
|
* Facility: m4 macro processor
|
|
* by: oz
|
|
*/
|
|
|
|
#include <sys/types.h>
|
|
#include <ctype.h>
|
|
#include <err.h>
|
|
#include <signal.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include "mdef.h"
|
|
#include "stdd.h"
|
|
#include "extern.h"
|
|
#include "pathnames.h"
|
|
|
|
ndptr hashtab[HASHSIZE]; /* hash table for macros etc. */
|
|
unsigned char buf[BUFSIZE]; /* push-back buffer */
|
|
unsigned char *bufbase = buf; /* the base for current ilevel */
|
|
unsigned char *bbase[MAXINP]; /* the base for each ilevel */
|
|
unsigned char *bp = buf; /* first available character */
|
|
unsigned char *endpbb = buf+BUFSIZE; /* end of push-back buffer */
|
|
stae mstack[STACKMAX+1]; /* stack of m4 machine */
|
|
char strspace[STRSPMAX+1]; /* string space for evaluation */
|
|
char *ep = strspace; /* first free char in strspace */
|
|
char *endest= strspace+STRSPMAX;/* end of string space */
|
|
int sp; /* current m4 stack pointer */
|
|
int fp; /* m4 call frame pointer */
|
|
FILE *infile[MAXINP]; /* input file stack (0=stdin) */
|
|
FILE *outfile[MAXOUT]; /* diversion array(0=bitbucket)*/
|
|
FILE *active; /* active output file pointer */
|
|
char *m4temp; /* filename for diversions */
|
|
int ilevel = 0; /* input file stack pointer */
|
|
int oindex = 0; /* diversion index.. */
|
|
char *null = ""; /* as it says.. just a null.. */
|
|
char *m4wraps = ""; /* m4wrap string default.. */
|
|
char lquote = LQUOTE; /* left quote character (`) */
|
|
char rquote = RQUOTE; /* right quote character (') */
|
|
char scommt = SCOMMT; /* start character for comment */
|
|
char ecommt = ECOMMT; /* end character for comment */
|
|
|
|
struct keyblk keywrds[] = { /* m4 keywords to be installed */
|
|
"include", INCLTYPE,
|
|
"sinclude", SINCTYPE,
|
|
"define", DEFITYPE,
|
|
"defn", DEFNTYPE,
|
|
"divert", DIVRTYPE,
|
|
"expr", EXPRTYPE,
|
|
"eval", EXPRTYPE,
|
|
"substr", SUBSTYPE,
|
|
"ifelse", IFELTYPE,
|
|
"ifdef", IFDFTYPE,
|
|
"len", LENGTYPE,
|
|
"incr", INCRTYPE,
|
|
"decr", DECRTYPE,
|
|
"dnl", DNLNTYPE,
|
|
"changequote", CHNQTYPE,
|
|
"changecom", CHNCTYPE,
|
|
"index", INDXTYPE,
|
|
#ifdef EXTENDED
|
|
"paste", PASTTYPE,
|
|
"spaste", SPASTYPE,
|
|
#endif
|
|
"popdef", POPDTYPE,
|
|
"pushdef", PUSDTYPE,
|
|
"dumpdef", DUMPTYPE,
|
|
"shift", SHIFTYPE,
|
|
"translit", TRNLTYPE,
|
|
"undefine", UNDFTYPE,
|
|
"undivert", UNDVTYPE,
|
|
"divnum", DIVNTYPE,
|
|
"maketemp", MKTMTYPE,
|
|
"errprint", ERRPTYPE,
|
|
"m4wrap", M4WRTYPE,
|
|
"m4exit", EXITTYPE,
|
|
"syscmd", SYSCTYPE,
|
|
"sysval", SYSVTYPE,
|
|
|
|
#ifdef unix
|
|
"unix", MACRTYPE,
|
|
#else
|
|
#ifdef vms
|
|
"vms", MACRTYPE,
|
|
#endif
|
|
#endif
|
|
};
|
|
|
|
#define MAXKEYS (sizeof(keywrds)/sizeof(struct keyblk))
|
|
|
|
extern int optind;
|
|
extern char *optarg;
|
|
|
|
void macro();
|
|
void initkwds();
|
|
extern int getopt();
|
|
|
|
int
|
|
main(argc,argv)
|
|
int argc;
|
|
char *argv[];
|
|
{
|
|
register int c;
|
|
register int n;
|
|
char *p;
|
|
register FILE *ifp;
|
|
|
|
if (signal(SIGINT, SIG_IGN) != SIG_IGN)
|
|
signal(SIGINT, onintr);
|
|
|
|
initkwds();
|
|
|
|
while ((c = getopt(argc, argv, "tD:U:o:")) != -1)
|
|
switch(c) {
|
|
|
|
case 'D': /* define something..*/
|
|
for (p = optarg; *p; p++)
|
|
if (*p == '=')
|
|
break;
|
|
if (*p)
|
|
*p++ = EOS;
|
|
dodefine(optarg, p);
|
|
break;
|
|
case 'U': /* undefine... */
|
|
remhash(optarg, TOP);
|
|
break;
|
|
case 'o': /* specific output */
|
|
case '?':
|
|
usage();
|
|
}
|
|
|
|
argc -= optind;
|
|
argv += optind;
|
|
|
|
active = stdout; /* default active output */
|
|
/* filename for diversions */
|
|
m4temp = mktemp(xstrdup(_PATH_DIVNAME));
|
|
|
|
bbase[0] = bufbase;
|
|
if (!argc) {
|
|
sp = -1; /* stack pointer initialized */
|
|
fp = 0; /* frame pointer initialized */
|
|
infile[0] = stdin; /* default input (naturally) */
|
|
macro();
|
|
} else
|
|
for (; argc--; ++argv) {
|
|
p = *argv;
|
|
if (p[0] == '-' && p[1] == '\0')
|
|
ifp = stdin;
|
|
else if ((ifp = fopen(p, "r")) == NULL)
|
|
err(1, "%s", p);
|
|
sp = -1;
|
|
fp = 0;
|
|
infile[0] = ifp;
|
|
macro();
|
|
if (ifp != stdin)
|
|
(void)fclose(ifp);
|
|
}
|
|
|
|
if (*m4wraps) { /* anything for rundown ?? */
|
|
ilevel = 0; /* in case m4wrap includes.. */
|
|
bufbase = bp = buf; /* use the entire buffer */
|
|
putback(EOF); /* eof is a must !! */
|
|
pbstr(m4wraps); /* user-defined wrapup act */
|
|
macro(); /* last will and testament */
|
|
}
|
|
|
|
if (active != stdout)
|
|
active = stdout; /* reset output just in case */
|
|
for (n = 1; n < MAXOUT; n++) /* default wrap-up: undivert */
|
|
if (outfile[n] != NULL)
|
|
getdiv(n);
|
|
/* remove bitbucket if used */
|
|
if (outfile[0] != NULL) {
|
|
(void) fclose(outfile[0]);
|
|
m4temp[UNIQUE] = '0';
|
|
#ifdef vms
|
|
(void) remove(m4temp);
|
|
#else
|
|
(void) unlink(m4temp);
|
|
#endif
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
ndptr inspect();
|
|
|
|
/*
|
|
* macro - the work horse..
|
|
*/
|
|
void
|
|
macro() {
|
|
char token[MAXTOK];
|
|
register char *s;
|
|
register int t, l;
|
|
register ndptr p;
|
|
register int nlpar;
|
|
|
|
cycle {
|
|
if ((t = gpbc()) == '_' || (t != EOF && isalpha(t))) {
|
|
putback(t);
|
|
if ((p = inspect(s = token)) == nil) {
|
|
if (sp < 0)
|
|
while (*s)
|
|
putc(*s++, active);
|
|
else
|
|
while (*s)
|
|
chrsave(*s++);
|
|
}
|
|
else {
|
|
/*
|
|
* real thing.. First build a call frame:
|
|
*/
|
|
pushf(fp); /* previous call frm */
|
|
pushf(p->type); /* type of the call */
|
|
pushf(0); /* parenthesis level */
|
|
fp = sp; /* new frame pointer */
|
|
/*
|
|
* now push the string arguments:
|
|
*/
|
|
pushs(p->defn); /* defn string */
|
|
pushs(p->name); /* macro name */
|
|
pushs(ep); /* start next..*/
|
|
|
|
putback(l = gpbc());
|
|
if (l != LPAREN) { /* add bracks */
|
|
putback(RPAREN);
|
|
putback(LPAREN);
|
|
}
|
|
}
|
|
}
|
|
else if (t == EOF) {
|
|
if (sp > -1)
|
|
errx(1, "unexpected end of input");
|
|
if (ilevel <= 0)
|
|
break; /* all done thanks.. */
|
|
--ilevel;
|
|
(void) fclose(infile[ilevel+1]);
|
|
bufbase = bbase[ilevel];
|
|
continue;
|
|
}
|
|
/*
|
|
* non-alpha single-char token seen..
|
|
* [the order of else if .. stmts is important.]
|
|
*/
|
|
else if (t == lquote) { /* strip quotes */
|
|
nlpar = 1;
|
|
do {
|
|
if ((l = gpbc()) == rquote)
|
|
nlpar--;
|
|
else if (l == lquote)
|
|
nlpar++;
|
|
else if (l == EOF)
|
|
errx(1, "missing right quote");
|
|
if (nlpar > 0) {
|
|
if (sp < 0)
|
|
putc(l, active);
|
|
else
|
|
chrsave(l);
|
|
}
|
|
}
|
|
while (nlpar != 0);
|
|
}
|
|
|
|
else if (sp < 0) { /* not in a macro at all */
|
|
if (t == scommt) { /* comment handling here */
|
|
putc(t, active);
|
|
while ((t = gpbc()) != ecommt)
|
|
putc(t, active);
|
|
}
|
|
putc(t, active); /* output directly.. */
|
|
}
|
|
|
|
else switch(t) {
|
|
|
|
case LPAREN:
|
|
if (PARLEV > 0)
|
|
chrsave(t);
|
|
while ((l = gpbc()) != EOF && isspace(l))
|
|
; /* skip blank, tab, nl.. */
|
|
putback(l);
|
|
PARLEV++;
|
|
break;
|
|
|
|
case RPAREN:
|
|
if (--PARLEV > 0)
|
|
chrsave(t);
|
|
else { /* end of argument list */
|
|
chrsave(EOS);
|
|
|
|
if (sp == STACKMAX)
|
|
errx(1, "internal stack overflow");
|
|
|
|
if (CALTYP == MACRTYPE)
|
|
expand((char **) mstack+fp+1, sp-fp);
|
|
else
|
|
eval((char **) mstack+fp+1, sp-fp, CALTYP);
|
|
|
|
ep = PREVEP; /* flush strspace */
|
|
sp = PREVSP; /* previous sp.. */
|
|
fp = PREVFP; /* rewind stack...*/
|
|
}
|
|
break;
|
|
|
|
case COMMA:
|
|
if (PARLEV == 1) {
|
|
chrsave(EOS); /* new argument */
|
|
while ((l = gpbc()) != EOF && isspace(l))
|
|
;
|
|
putback(l);
|
|
pushs(ep);
|
|
} else
|
|
chrsave(t);
|
|
break;
|
|
|
|
default:
|
|
chrsave(t); /* stack the char */
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* build an input token..
|
|
* consider only those starting with _ or A-Za-z. This is a
|
|
* combo with lookup to speed things up.
|
|
*/
|
|
ndptr
|
|
inspect(tp)
|
|
register char *tp;
|
|
{
|
|
register int c;
|
|
register char *name = tp;
|
|
register char *etp = tp+MAXTOK;
|
|
register ndptr p;
|
|
register unsigned long h = 0;
|
|
|
|
while ((c = gpbc()) != EOF && (isalnum(c) || c == '_') && tp < etp)
|
|
h = (h << 5) + h + (*tp++ = c);
|
|
putback(c);
|
|
if (tp == etp)
|
|
errx(1, "token too long");
|
|
|
|
*tp = EOS;
|
|
|
|
for (p = hashtab[h%HASHSIZE]; p != nil; p = p->nxtptr)
|
|
if (STREQ(name, p->name))
|
|
break;
|
|
return p;
|
|
}
|
|
|
|
/*
|
|
* initkwds - initialise m4 keywords as fast as possible.
|
|
* This very similar to install, but without certain overheads,
|
|
* such as calling lookup. Malloc is not used for storing the
|
|
* keyword strings, since we simply use the static pointers
|
|
* within keywrds block.
|
|
*/
|
|
void
|
|
initkwds() {
|
|
register int i;
|
|
register int h;
|
|
register ndptr p;
|
|
|
|
for (i = 0; i < MAXKEYS; i++) {
|
|
h = hash(keywrds[i].knam);
|
|
p = (ndptr) xalloc(sizeof(struct ndblock));
|
|
p->nxtptr = hashtab[h];
|
|
hashtab[h] = p;
|
|
p->name = keywrds[i].knam;
|
|
p->defn = null;
|
|
p->type = keywrds[i].ktyp | STATIC;
|
|
}
|
|
}
|