FreeBSD-5.3/usr.bin/xstr/xstr.c
/*
* Copyright (c) 1980, 1993
* The Regents of the University of California. All rights reserved.
*
* 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.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD: src/usr.bin/xstr/xstr.c,v 1.9 2004/07/15 04:56:41 tjr Exp $");
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1980, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif
#ifndef lint
static const char sccsid[] = "@(#)xstr.c 8.1 (Berkeley) 6/9/93";
#endif
#include <sys/types.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <signal.h>
#include <string.h>
#include <unistd.h>
#include "pathnames.h"
/*
* xstr - extract and hash strings in a C program
*
* Bill Joy UCB
* November, 1978
*/
#define ignore(a) ((void) a)
off_t tellpt;
off_t mesgpt;
char cstrings[] = "strings";
char *strings = cstrings;
int cflg;
int vflg;
int readstd;
char lastchr(char *);
int fgetNUL(char *, int, FILE *);
int istail(char *, char *);
int octdigit(char);
int xgetc(FILE *);
off_t hashit(char *, int);
off_t yankstr(char **);
static void usage(void);
void flushsh(void);
void found(int, off_t, char *);
void inithash(void);
void onintr(int);
void process(const char *);
void prstr(char *);
void xsdotc(void);
int
main(int argc, char *argv[])
{
int c;
while ((c = getopt(argc, argv, "-cv")) != -1)
switch (c) {
case '-':
readstd++;
break;
case 'c':
cflg++;
break;
case 'v':
vflg++;
break;
default:
usage();
}
argc -= optind;
argv += optind;
if (signal(SIGINT, SIG_IGN) == SIG_DFL)
signal(SIGINT, onintr);
if (cflg || (argc == 0 && !readstd))
inithash();
else
strings = mktemp(strdup(_PATH_TMP));
while (readstd || argc > 0) {
if (freopen("x.c", "w", stdout) == NULL)
err(1, "x.c");
if (!readstd && freopen(argv[0], "r", stdin) == NULL)
err(2, "%s", argv[0]);
process("x.c");
if (readstd == 0)
argc--, argv++;
else
readstd = 0;
};
flushsh();
if (cflg == 0)
xsdotc();
if (strings[0] == '/')
ignore(unlink(strings));
exit(0);
}
static void
usage(void)
{
fprintf(stderr, "usage: xstr [-v] [-c] [-] [name ...]\n");
exit (1);
}
char linebuf[BUFSIZ];
void
process(const char *name)
{
char *cp;
int c;
int incomm = 0;
int ret;
printf("extern char\txstr[];\n");
for (;;) {
if (fgets(linebuf, sizeof linebuf, stdin) == NULL) {
if (ferror(stdin))
err(3, "%s", name);
break;
}
if (linebuf[0] == '#') {
if (linebuf[1] == ' ' && isdigit(linebuf[2]))
printf("#line%s", &linebuf[1]);
else
printf("%s", linebuf);
continue;
}
for (cp = linebuf; (c = *cp++);) switch (c) {
case '"':
if (incomm)
goto def;
if ((ret = (int) yankstr(&cp)) == -1)
goto out;
printf("(&xstr[%d])", ret);
break;
case '\'':
if (incomm)
goto def;
putchar(c);
if (*cp)
putchar(*cp++);
break;
case '/':
if (incomm || *cp != '*')
goto def;
incomm = 1;
cp++;
printf("/*");
continue;
case '*':
if (incomm && *cp == '/') {
incomm = 0;
cp++;
printf("*/");
continue;
}
goto def;
def:
default:
putchar(c);
break;
}
}
out:
if (ferror(stdout))
warn("x.c"), onintr(0);
}
off_t
yankstr(char **cpp)
{
char *cp = *cpp;
int c, ch;
char dbuf[BUFSIZ];
char *dp = dbuf;
char *tp;
static char tmp[] = "b\bt\tr\rn\nf\f\\\\\"\"";
while ((c = *cp++)) {
if (dp == dbuf + sizeof(dbuf) - 3)
errx(1, "message too long");
switch (c) {
case '"':
cp++;
goto out;
case '\\':
c = *cp++;
if (c == 0)
break;
if (c == '\n') {
if (fgets(linebuf, sizeof linebuf, stdin)
== NULL) {
if (ferror(stdin))
err(3, "x.c");
return(-1);
}
cp = linebuf;
continue;
}
for (tp = tmp; (ch = *tp++); tp++)
if (c == ch) {
c = *tp;
goto gotc;
}
if (!octdigit(c)) {
*dp++ = '\\';
break;
}
c -= '0';
if (!octdigit(*cp))
break;
c <<= 3, c += *cp++ - '0';
if (!octdigit(*cp))
break;
c <<= 3, c += *cp++ - '0';
break;
}
gotc:
*dp++ = c;
}
out:
*cpp = --cp;
*dp = 0;
return (hashit(dbuf, 1));
}
int
octdigit(char c)
{
return (isdigit(c) && c != '8' && c != '9');
}
void
inithash(void)
{
char buf[BUFSIZ];
FILE *mesgread = fopen(strings, "r");
if (mesgread == NULL)
return;
for (;;) {
mesgpt = tellpt;
if (fgetNUL(buf, sizeof buf, mesgread) == 0)
break;
ignore(hashit(buf, 0));
}
ignore(fclose(mesgread));
}
int
fgetNUL(char *obuf, int rmdr, FILE *file)
{
int c;
char *buf = obuf;
while (--rmdr > 0 && (c = xgetc(file)) != 0 && c != EOF)
*buf++ = c;
*buf++ = 0;
return ((feof(file) || ferror(file)) ? 0 : 1);
}
int
xgetc(FILE *file)
{
tellpt++;
return (getc(file));
}
#define BUCKETS 128
struct hash {
off_t hpt;
char *hstr;
struct hash *hnext;
short hnew;
} bucket[BUCKETS];
off_t
hashit(char *str, int new)
{
int i;
struct hash *hp, *hp0;
hp = hp0 = &bucket[lastchr(str) & 0177];
while (hp->hnext) {
hp = hp->hnext;
i = istail(str, hp->hstr);
if (i >= 0)
return (hp->hpt + i);
}
if ((hp = (struct hash *) calloc(1, sizeof (*hp))) == NULL)
errx(8, "calloc");
hp->hpt = mesgpt;
if (!(hp->hstr = strdup(str)))
err(1, NULL);
mesgpt += strlen(hp->hstr) + 1;
hp->hnext = hp0->hnext;
hp->hnew = new;
hp0->hnext = hp;
return (hp->hpt);
}
void
flushsh(void)
{
int i;
struct hash *hp;
FILE *mesgwrit;
int old = 0, new = 0;
for (i = 0; i < BUCKETS; i++)
for (hp = bucket[i].hnext; hp != NULL; hp = hp->hnext)
if (hp->hnew)
new++;
else
old++;
if (new == 0 && old != 0)
return;
mesgwrit = fopen(strings, old ? "r+" : "w");
if (mesgwrit == NULL)
err(4, "%s", strings);
for (i = 0; i < BUCKETS; i++)
for (hp = bucket[i].hnext; hp != NULL; hp = hp->hnext) {
found(hp->hnew, hp->hpt, hp->hstr);
if (hp->hnew) {
fseek(mesgwrit, hp->hpt, 0);
ignore(fwrite(hp->hstr, strlen(hp->hstr) + 1, 1, mesgwrit));
if (ferror(mesgwrit))
err(4, "%s", strings);
}
}
if (fclose(mesgwrit) == EOF)
err(4, "%s", strings);
}
void
found(int new, off_t off, char *str)
{
if (vflg == 0)
return;
if (!new)
fprintf(stderr, "found at %d:", (int) off);
else
fprintf(stderr, "new at %d:", (int) off);
prstr(str);
fprintf(stderr, "\n");
}
void
prstr(char *cp)
{
int c;
while ((c = (*cp++ & 0377)))
if (c < ' ')
fprintf(stderr, "^%c", c + '`');
else if (c == 0177)
fprintf(stderr, "^?");
else if (c > 0200)
fprintf(stderr, "\\%03o", c);
else
fprintf(stderr, "%c", c);
}
void
xsdotc(void)
{
FILE *strf = fopen(strings, "r");
FILE *xdotcf;
if (strf == NULL)
err(5, "%s", strings);
xdotcf = fopen("xs.c", "w");
if (xdotcf == NULL)
err(6, "xs.c");
fprintf(xdotcf, "char\txstr[] = {\n");
for (;;) {
int i, c;
for (i = 0; i < 8; i++) {
c = getc(strf);
if (ferror(strf)) {
warn("%s", strings);
onintr(0);
}
if (feof(strf)) {
fprintf(xdotcf, "\n");
goto out;
}
fprintf(xdotcf, "0x%02x,", c);
}
fprintf(xdotcf, "\n");
}
out:
fprintf(xdotcf, "};\n");
ignore(fclose(xdotcf));
ignore(fclose(strf));
}
char
lastchr(char *cp)
{
while (cp[0] && cp[1])
cp++;
return (*cp);
}
int
istail(char *str, char *of)
{
int d = strlen(of) - strlen(str);
if (d < 0 || strcmp(&of[d], str) != 0)
return (-1);
return (d);
}
void
onintr(int dummy __unused)
{
ignore(signal(SIGINT, SIG_IGN));
if (strings[0] == '/')
ignore(unlink(strings));
ignore(unlink("x.c"));
ignore(unlink("xs.c"));
exit(7);
}