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/*
* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
*/
#ifndef lint
char copyright[] =
"@(#) Copyright (c) 1980 Regents of the University of California.\n\
All rights reserved.\n";
#endif not lint
#ifndef lint
static char sccsid[] = "@(#)xstr.c 5.3 (Berkeley) 1/13/86";
#endif not lint
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include <signal.h>
/*
* xstr - extract and hash strings in a C program
*
* Bill Joy UCB
* November, 1978
*/
#define ignore(a) ((void) a)
char *calloc();
off_t tellpt;
off_t hashit();
char *mktemp();
int onintr();
char *savestr();
char *strcat();
char *strcpy();
off_t yankstr();
off_t mesgpt;
char *strings = "strings";
int cflg;
int vflg;
int readstd;
main(argc, argv)
int argc;
char *argv[];
{
argc--, argv++;
while (argc > 0 && argv[0][0] == '-') {
register char *cp = &(*argv++)[1];
argc--;
if (*cp == 0) {
readstd++;
continue;
}
do switch (*cp++) {
case 'c':
cflg++;
continue;
case 'v':
vflg++;
continue;
default:
fprintf(stderr, "usage: xstr [ -v ] [ -c ] [ - ] [ name ... ]\n");
} while (*cp);
}
if (signal(SIGINT, SIG_IGN) == SIG_DFL)
signal(SIGINT, onintr);
if (cflg || argc == 0 && !readstd)
inithash();
else
strings = mktemp(savestr("/tmp/xstrXXXXXX"));
while (readstd || argc > 0) {
if (freopen("x.c", "w", stdout) == NULL)
perror("x.c"), exit(1);
if (!readstd && freopen(argv[0], "r", stdin) == NULL)
perror(argv[0]), exit(2);
process("x.c");
if (readstd == 0)
argc--, argv++;
else
readstd = 0;
};
flushsh();
if (cflg == 0)
xsdotc();
if (strings[0] == '/')
ignore(unlink(strings));
exit(0);
}
char linebuf[BUFSIZ];
process(name)
char *name;
{
char *cp;
register int c;
register int incomm = 0;
int ret;
printf("extern char\txstr[];\n");
for (;;) {
if (fgets(linebuf, sizeof linebuf, stdin) == NULL) {
if (ferror(stdin)) {
perror(name);
exit(3);
}
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))
perror("x.c"), onintr();
}
off_t
yankstr(cpp)
register char **cpp;
{
register char *cp = *cpp;
register int c, ch;
char dbuf[BUFSIZ];
register char *dp = dbuf;
register char *tp;
while (c = *cp++) {
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)) {
perror("x.c");
exit(3);
}
return(-1);
}
cp = linebuf;
continue;
}
for (tp = "b\bt\tr\rn\nf\f\\\\\"\""; 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));
}
octdigit(c)
char c;
{
return (isdigit(c) && c != '8' && c != '9');
}
inithash()
{
char buf[BUFSIZ];
register FILE *mesgread = fopen(strings, "r");
if (mesgread == NULL)
return;
for (;;) {
mesgpt = tellpt;
if (fgetNUL(buf, sizeof buf, mesgread) == NULL)
break;
ignore(hashit(buf, 0));
}
ignore(fclose(mesgread));
}
fgetNUL(obuf, rmdr, file)
char *obuf;
register int rmdr;
FILE *file;
{
register c;
register char *buf = obuf;
while (--rmdr > 0 && (c = xgetc(file)) != 0 && c != EOF)
*buf++ = c;
*buf++ = 0;
return ((feof(file) || ferror(file)) ? NULL : 1);
}
xgetc(file)
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(str, new)
char *str;
int new;
{
int i;
register 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) {
perror("xstr");
exit(8);
}
hp->hpt = mesgpt;
hp->hstr = savestr(str);
mesgpt += strlen(hp->hstr) + 1;
hp->hnext = hp0->hnext;
hp->hnew = new;
hp0->hnext = hp;
return (hp->hpt);
}
flushsh()
{
register int i;
register struct hash *hp;
register FILE *mesgwrit;
register 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)
perror(strings), exit(4);
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))
perror(strings), exit(4);
}
}
if (fclose(mesgwrit) == EOF)
perror(strings), exit(4);
}
found(new, off, str)
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");
}
prstr(cp)
register char *cp;
{
register 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);
}
xsdotc()
{
register FILE *strf = fopen(strings, "r");
register FILE *xdotcf;
if (strf == NULL)
perror(strings), exit(5);
xdotcf = fopen("xs.c", "w");
if (xdotcf == NULL)
perror("xs.c"), exit(6);
fprintf(xdotcf, "char\txstr[] = {\n");
for (;;) {
register int i, c;
for (i = 0; i < 8; i++) {
c = getc(strf);
if (ferror(strf)) {
perror(strings);
onintr();
}
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 *
savestr(cp)
register char *cp;
{
register char *dp;
if ((dp = (char *) calloc(1, strlen(cp) + 1)) == NULL) {
perror("xstr");
exit(8);
}
return (strcpy(dp, cp));
}
lastchr(cp)
register char *cp;
{
while (cp[0] && cp[1])
cp++;
return (*cp);
}
istail(str, of)
register char *str, *of;
{
register int d = strlen(of) - strlen(str);
if (d < 0 || strcmp(&of[d], str) != 0)
return (-1);
return (d);
}
onintr()
{
ignore(signal(SIGINT, SIG_IGN));
if (strings[0] == '/')
ignore(unlink(strings));
ignore(unlink("x.c"));
ignore(unlink("xs.c"));
exit(7);
}