/* $OpenBSD: misc.c,v 1.24 2001/09/19 13:14:18 espie Exp $ */ /* $NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $ */ /* * 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 #if 0 static char sccsid[] = "@(#)misc.c 8.1 (Berkeley) 6/6/93"; #else static char rcsid[] = "$OpenBSD: misc.c,v 1.24 2001/09/19 13:14:18 espie Exp $"; #endif #endif /* not lint */ #include #include #include #include #include #include #include #include #include "mdef.h" #include "stdd.h" #include "extern.h" #include "pathnames.h" char *ep; /* first free char in strspace */ static char *strspace; /* string space for evaluation */ char *endest; /* end of string space */ static size_t strsize = STRSPMAX; static size_t bufsize = BUFSIZE; char *buf; /* push-back buffer */ char *bufbase; /* the base for current ilevel */ char *bbase[MAXINP]; /* the base for each ilevel */ char *bp; /* first available character */ char *endpbb; /* end of push-back buffer */ /* * find the index of second str in the first str. */ ptrdiff_t indx(s1, s2) const char *s1; const char *s2; { char *t; t = strstr(s1, s2); if (t == NULL) return (-1); else return (t - s1); } /* * putback - push character back onto input */ void putback(c) int c; { if (c == EOF) return; if (bp >= endpbb) enlarge_bufspace(); *bp++ = c; } /* * pbstr - push string back onto input * putback is replicated to improve * performance. */ void pbstr(s) const char *s; { size_t n; n = strlen(s); while (endpbb - bp <= n) enlarge_bufspace(); while (n > 0) *bp++ = s[--n]; } /* * pbnum - convert number to string, push back on input. */ void pbnum(n) int n; { int num; num = (n < 0) ? -n : n; do { putback(num % 10 + '0'); } while ((num /= 10) > 0); if (n < 0) putback('-'); } /* * pbunsigned - convert unsigned long to string, push back on input. */ void pbunsigned(n) unsigned long n; { do { putback(n % 10 + '0'); } while ((n /= 10) > 0); } void initspaces() { int i; strspace = xalloc(strsize+1); ep = strspace; endest = strspace+strsize; buf = (char *)xalloc(bufsize); bufbase = buf; bp = buf; endpbb = buf + bufsize; for (i = 0; i < MAXINP; i++) bbase[i] = buf; } void enlarge_strspace() { char *newstrspace; int i; strsize *= 2; newstrspace = malloc(strsize + 1); if (!newstrspace) errx(1, "string space overflow"); memcpy(newstrspace, strspace, strsize/2); for (i = 0; i <= sp; i++) if (sstack[i]) mstack[i].sstr = (mstack[i].sstr - strspace) + newstrspace; ep = (ep-strspace) + newstrspace; free(strspace); strspace = newstrspace; endest = strspace + strsize; } void enlarge_bufspace() { char *newbuf; int i; bufsize *= 2; newbuf = realloc(buf, bufsize); if (!newbuf) errx(1, "too many characters pushed back"); for (i = 0; i < MAXINP; i++) bbase[i] = (bbase[i]-buf)+newbuf; bp = (bp-buf)+newbuf; bufbase = (bufbase-buf)+newbuf; buf = newbuf; endpbb = buf+bufsize; } /* * chrsave - put single char on string space */ void chrsave(c) int c; { if (ep >= endest) enlarge_strspace(); *ep++ = c; } /* * read in a diversion file, and dispose it. */ void getdiv(n) int n; { int c; if (active == outfile[n]) errx(1, "undivert: diversion still active"); rewind(outfile[n]); while ((c = getc(outfile[n])) != EOF) putc(c, active); (void) fclose(outfile[n]); outfile[n] = NULL; } void onintr(signo) int signo; { #define intrmessage "m4: interrupted.\n" write(STDERR_FILENO, intrmessage, sizeof(intrmessage)); _exit(1); } /* * killdiv - get rid of the diversion files */ void killdiv() { int n; for (n = 0; n < maxout; n++) if (outfile[n] != NULL) { (void) fclose(outfile[n]); } } /* * resizedivs: allocate more diversion files */ void resizedivs(n) int n; { int i; outfile = (FILE **)realloc(outfile, sizeof(FILE *) * n); if (outfile == NULL) errx(1, "too many diverts %d", n); for (i = maxout; i < n; i++) outfile[i] = NULL; maxout = n; } void * xalloc(n) size_t n; { char *p = malloc(n); if (p == NULL) err(1, "malloc"); return p; } char * xstrdup(s) const char *s; { char *p = strdup(s); if (p == NULL) err(1, "strdup"); return p; } void usage() { fprintf(stderr, "usage: m4 [-Dname[=val]] [-Uname] [-I dirname...]\n"); exit(1); } int obtain_char(f) struct input_file *f; { if (f->c == EOF) return EOF; else if (f->c == '\n') f->lineno++; f->c = fgetc(f->file); return f->c; } void set_input(f, real, name) struct input_file *f; FILE *real; const char *name; { f->file = real; f->lineno = 1; f->c = 0; f->name = xstrdup(name); } void release_input(f) struct input_file *f; { if (f->file != stdin) fclose(f->file); f->c = EOF; /* * XXX can't free filename, as there might still be * error information pointing to it. */ } void doprintlineno(f) struct input_file *f; { pbunsigned(f->lineno); } void doprintfilename(f) struct input_file *f; { pbstr(f->name); } /* * buffer_mark/dump_buffer: allows one to save a mark in a buffer, * and later dump everything that was added since then to a file. */ size_t buffer_mark() { return bp - buf; } void dump_buffer(f, m) FILE *f; size_t m; { char *s; for (s = bp; s-buf > m;) fputc(*--s, f); }