+/* Copyright (c) 1979 Regents of the University of California */
+#include <stdio.h>
+#include <ctype.h>
+#include <sys/types.h>
+#include <signal.h>
+
+int lseek(); /* Chicanery */
+/*
+ * xstr - extract and hash strings in a C program
+ *
+ * Bill Joy UCB
+ * November, 1978
+ */
+
+#define ignore(a) Ignore((char *) 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);
+}
+
+process(name)
+ char *name;
+{
+ char *cp;
+ char linebuf[BUFSIZ];
+ register int c;
+ register int incomm = 0;
+
+ printf("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;
+ printf("(&xstr[%d])", (int) yankstr(&cp));
+ 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;
+ }
+ }
+ 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')
+ 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);
+ }
+ hp = (struct hash *) calloc(1, sizeof (*hp));
+ 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 ? "a" : "w");
+ 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);
+ }
+ }
+ ignore(fclose(mesgwrit));
+}
+
+found(new, off, str)
+ int new;
+ off_t off;
+ char *str;
+{
+ register char *cp;
+
+ 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 = (char *) calloc(1, strlen(cp) + 1);
+
+ return (strcpy(dp, cp));
+}
+
+Ignore(a)
+ char *a;
+{
+
+ a = a;
+}
+
+ignorf(a)
+ int (*a)();
+{
+
+ a = a;
+}
+
+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()
+{
+
+ ignorf(signal(SIGINT, SIG_IGN));
+ if (strings[0] == '/')
+ ignore(unlink(strings));
+ ignore(unlink("x.c"));
+ ignore(unlink("xs.c"));
+ exit(7);
+}
projects / unix-history / commitdiff