471 lines
8.7 KiB
C
471 lines
8.7 KiB
C
/* $OpenBSD: misc.c,v 1.47 2017/06/15 13:48:42 bcallah Exp $ */
|
|
/* $NetBSD: misc.c,v 1.6 1995/09/28 05:37:41 tls Exp $ */
|
|
|
|
/*-
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*
|
|
* 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. 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
#include <sys/types.h>
|
|
#include <errno.h>
|
|
#include <unistd.h>
|
|
#include <stdarg.h>
|
|
#include <stdio.h>
|
|
#include <stdint.h>
|
|
#include <stdlib.h>
|
|
#include <stddef.h>
|
|
#include <string.h>
|
|
#include <err.h>
|
|
#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;
|
|
|
|
unsigned char *buf; /* push-back buffer */
|
|
unsigned char *bufbase; /* the base for current ilevel */
|
|
unsigned char *bbase[MAXINP]; /* the base for each ilevel */
|
|
unsigned char *bp; /* first available character */
|
|
unsigned char *endpbb; /* end of push-back buffer */
|
|
|
|
|
|
/*
|
|
* find the index of second str in the first str.
|
|
*/
|
|
ptrdiff_t
|
|
indx(const char *s1, const char *s2)
|
|
{
|
|
char *t;
|
|
|
|
t = strstr(s1, s2);
|
|
if (t == NULL)
|
|
return (-1);
|
|
else
|
|
return (t - s1);
|
|
}
|
|
/*
|
|
* pushback - push character back onto input
|
|
*/
|
|
void
|
|
pushback(int c)
|
|
{
|
|
if (c == EOF)
|
|
return;
|
|
if (bp >= endpbb)
|
|
enlarge_bufspace();
|
|
*bp++ = c;
|
|
}
|
|
|
|
/*
|
|
* pbstr - push string back onto input
|
|
* pushback is replicated to improve
|
|
* performance.
|
|
*/
|
|
void
|
|
pbstr(const char *s)
|
|
{
|
|
size_t n;
|
|
|
|
n = strlen(s);
|
|
while (endpbb - bp <= (long)n)
|
|
enlarge_bufspace();
|
|
while (n > 0)
|
|
*bp++ = s[--n];
|
|
}
|
|
|
|
/*
|
|
* pbnum - convert number to string, push back on input.
|
|
*/
|
|
void
|
|
pbnum(int n)
|
|
{
|
|
pbnumbase(n, 10, 0);
|
|
}
|
|
|
|
void
|
|
pbnumbase(int n, int base, int d)
|
|
{
|
|
static char digits[36] = "0123456789abcdefghijklmnopqrstuvwxyz";
|
|
int num;
|
|
int printed = 0;
|
|
|
|
if (base > 36)
|
|
m4errx(1, "base %d > 36: not supported.", base);
|
|
|
|
if (base < 2)
|
|
m4errx(1, "bad base %d for conversion.", base);
|
|
|
|
num = (n < 0) ? -n : n;
|
|
do {
|
|
pushback(digits[num % base]);
|
|
printed++;
|
|
}
|
|
while ((num /= base) > 0);
|
|
|
|
if (n < 0)
|
|
printed++;
|
|
while (printed++ < d)
|
|
pushback('0');
|
|
|
|
if (n < 0)
|
|
pushback('-');
|
|
}
|
|
|
|
/*
|
|
* pbunsigned - convert unsigned long to string, push back on input.
|
|
*/
|
|
void
|
|
pbunsigned(unsigned long n)
|
|
{
|
|
do {
|
|
pushback(n % 10 + '0');
|
|
}
|
|
while ((n /= 10) > 0);
|
|
}
|
|
|
|
void
|
|
initspaces(void)
|
|
{
|
|
int i;
|
|
|
|
strspace = xalloc(strsize+1, NULL);
|
|
ep = strspace;
|
|
endest = strspace+strsize;
|
|
buf = xalloc(bufsize, NULL);
|
|
bufbase = buf;
|
|
bp = buf;
|
|
endpbb = buf + bufsize;
|
|
for (i = 0; i < MAXINP; i++)
|
|
bbase[i] = buf;
|
|
}
|
|
|
|
void
|
|
enlarge_strspace(void)
|
|
{
|
|
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] == STORAGE_STRSPACE)
|
|
mstack[i].sstr = (mstack[i].sstr - strspace)
|
|
+ newstrspace;
|
|
ep = (ep-strspace) + newstrspace;
|
|
free(strspace);
|
|
strspace = newstrspace;
|
|
endest = strspace + strsize;
|
|
}
|
|
|
|
void
|
|
enlarge_bufspace(void)
|
|
{
|
|
unsigned char *newbuf;
|
|
int i;
|
|
|
|
bufsize += bufsize/2;
|
|
newbuf = xrealloc(buf, bufsize, "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(int c)
|
|
{
|
|
if (ep >= endest)
|
|
enlarge_strspace();
|
|
*ep++ = c;
|
|
}
|
|
|
|
/*
|
|
* read in a diversion file, and dispose it.
|
|
*/
|
|
void
|
|
getdiv(int n)
|
|
{
|
|
int c;
|
|
|
|
if (active == outfile[n])
|
|
m4errx(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(int signo __unused)
|
|
{
|
|
#define intrmessage "m4: interrupted.\n"
|
|
write(STDERR_FILENO, intrmessage, sizeof(intrmessage)-1);
|
|
_exit(1);
|
|
}
|
|
|
|
/*
|
|
* killdiv - get rid of the diversion files
|
|
*/
|
|
void
|
|
killdiv(void)
|
|
{
|
|
int n;
|
|
|
|
for (n = 0; n < maxout; n++)
|
|
if (outfile[n] != NULL) {
|
|
(void) fclose(outfile[n]);
|
|
}
|
|
}
|
|
|
|
extern char *__progname;
|
|
|
|
void
|
|
m4errx(int eval, const char *fmt, ...)
|
|
{
|
|
fprintf(stderr, "%s: ", __progname);
|
|
fprintf(stderr, "%s at line %lu: ", CURRENT_NAME, CURRENT_LINE);
|
|
if (fmt != NULL) {
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
vfprintf(stderr, fmt, ap);
|
|
va_end(ap);
|
|
}
|
|
fprintf(stderr, "\n");
|
|
exit(eval);
|
|
}
|
|
|
|
/*
|
|
* resizedivs: allocate more diversion files */
|
|
void
|
|
resizedivs(int n)
|
|
{
|
|
int i;
|
|
|
|
outfile = xreallocarray(outfile, n, sizeof(FILE *),
|
|
"too many diverts %d", n);
|
|
for (i = maxout; i < n; i++)
|
|
outfile[i] = NULL;
|
|
maxout = n;
|
|
}
|
|
|
|
void *
|
|
xalloc(size_t n, const char *fmt, ...)
|
|
{
|
|
void *p = malloc(n);
|
|
|
|
if (p == NULL) {
|
|
if (fmt == NULL)
|
|
err(1, "malloc");
|
|
else {
|
|
va_list va;
|
|
|
|
va_start(va, fmt);
|
|
verr(1, fmt, va);
|
|
va_end(va);
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
void *
|
|
xcalloc(size_t n, size_t s, const char *fmt, ...)
|
|
{
|
|
void *p = calloc(n, s);
|
|
|
|
if (p == NULL) {
|
|
if (fmt == NULL)
|
|
err(1, "calloc");
|
|
else {
|
|
va_list va;
|
|
|
|
va_start(va, fmt);
|
|
verr(1, fmt, va);
|
|
va_end(va);
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
void *
|
|
xrealloc(void *old, size_t n, const char *fmt, ...)
|
|
{
|
|
char *p = realloc(old, n);
|
|
|
|
if (p == NULL) {
|
|
free(old);
|
|
if (fmt == NULL)
|
|
err(1, "realloc");
|
|
else {
|
|
va_list va;
|
|
|
|
va_start(va, fmt);
|
|
verr(1, fmt, va);
|
|
va_end(va);
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
void *
|
|
xreallocarray(void *old, size_t s1, size_t s2, const char *fmt, ...)
|
|
{
|
|
void *p = reallocarray(old, s1, s2);
|
|
|
|
if (p == NULL) {
|
|
free(old);
|
|
if (fmt == NULL)
|
|
err(1, "reallocarray");
|
|
else {
|
|
va_list va;
|
|
|
|
va_start(va, fmt);
|
|
verr(1, fmt, va);
|
|
va_end(va);
|
|
}
|
|
}
|
|
return p;
|
|
}
|
|
|
|
char *
|
|
xstrdup(const char *s)
|
|
{
|
|
char *p = strdup(s);
|
|
if (p == NULL)
|
|
err(1, "strdup");
|
|
return p;
|
|
}
|
|
|
|
void
|
|
usage(void)
|
|
{
|
|
fprintf(stderr, "usage: m4 [-EgPs] [-Dname[=value]] [-d flags] "
|
|
"[-I dirname] [-o filename]\n"
|
|
"\t[-t macro] [-Uname] [file ...]\n");
|
|
exit(1);
|
|
}
|
|
|
|
int
|
|
obtain_char(struct input_file *f)
|
|
{
|
|
if (f->c == EOF)
|
|
return EOF;
|
|
|
|
f->c = fgetc(f->file);
|
|
if (f->c == '\n')
|
|
f->lineno++;
|
|
|
|
return f->c;
|
|
}
|
|
|
|
void
|
|
set_input(struct input_file *f, FILE *real, const char *name)
|
|
{
|
|
f->file = real;
|
|
f->lineno = 1;
|
|
f->c = 0;
|
|
f->name = xstrdup(name);
|
|
emit_synchline();
|
|
}
|
|
|
|
void
|
|
do_emit_synchline(void)
|
|
{
|
|
fprintf(active, "#line %lu \"%s\"\n",
|
|
infile[ilevel].lineno, infile[ilevel].name);
|
|
infile[ilevel].synch_lineno = infile[ilevel].lineno;
|
|
}
|
|
|
|
void
|
|
release_input(struct input_file *f)
|
|
{
|
|
if (ferror(f->file))
|
|
errx(1, "Fatal error reading from %s\n", f->name);
|
|
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(struct input_file *f)
|
|
{
|
|
pbunsigned(f->lineno);
|
|
}
|
|
|
|
void
|
|
doprintfilename(struct input_file *f)
|
|
{
|
|
pbstr(rquote);
|
|
pbstr(f->name);
|
|
pbstr(lquote);
|
|
}
|
|
|
|
/*
|
|
* 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(void)
|
|
{
|
|
return bp - buf;
|
|
}
|
|
|
|
|
|
void
|
|
dump_buffer(FILE *f, size_t m)
|
|
{
|
|
unsigned char *s;
|
|
|
|
for (s = bp; s-buf > (long)m;)
|
|
fputc(*--s, f);
|
|
}
|