/*- * 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. */ #if !defined(lint) && defined(DOSCCS) static char copyright[] = "@(#) Copyright (c) 1989, 1993\n\ The Regents of the University of California. All rights reserved.\n"; static char sccsid[] = "@(#)main.c 8.1 (Berkeley) 6/6/93"; #endif /* * main.c * Facility: m4 macro processor * by: oz */ #include #include #include #include #include #include #include "mdef.h" #include "stdd.h" #include "extern.h" #include "pathnames.h" ndptr hashtab[HASHSIZE]; /* hash table for macros etc. */ char buf[BUFSIZE]; /* push-back buffer */ char *bufbase = buf; /* the base for current ilevel */ char *bbase[MAXINP]; /* the base for each ilevel */ char *bp = buf; /* first available character */ 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 *progname; /* name of this program */ 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; progname = basename(argv[0]); if (signal(SIGINT, SIG_IGN) != SIG_IGN) signal(SIGINT, onintr); initkwds(); while ((c = getopt(argc, argv, "tD:U:o:")) != EOF) 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) oops("%s: %s", p, strerror(errno)); 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()) == '_' || 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) oops("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) oops("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 (isspace(l = gpbc())) ; /* 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) oops("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 (isspace(l = gpbc())) ; 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 char c; register char *name = tp; register char *etp = tp+MAXTOK; register ndptr p; register unsigned long h = 0; while ((isalnum(c = gpbc()) || c == '_') && tp < etp) h = (h << 5) + h + (*tp++ = c); putback(c); if (tp == etp) oops("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; } }