diff options
Diffstat (limited to 'util/deref.c')
| -rw-r--r-- | util/deref.c | 208 |
1 files changed, 208 insertions, 0 deletions
diff --git a/util/deref.c b/util/deref.c new file mode 100644 index 0000000..98e8ce0 --- /dev/null +++ b/util/deref.c @@ -0,0 +1,208 @@ +/* + * deref.c + * + * Make all texinfo references into the one argument form. + * + * Arnold Robbins + * arnold@gnu.org + * Written: December, 1991 + * Released: November, 1998 + * + * Copyright 1991, 1998 Arnold David Robbins + * + * DEREF is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3 of the License, or + * (at your option) any later version. + * + * DEREF is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/* + * LIMITATIONS: + * One texinfo cross reference per line. + * Cross references may not cross newlines. + * Use of fgets for input (to be fixed). + */ + +#include <stdio.h> +#include <ctype.h> +#include <errno.h> + +/* for gcc on the 3B1, delete if this gives you grief */ +extern int fclose(FILE *fp); +extern int fprintf(FILE *fp, const char *str, ...); +/* extern int sprintf(char *str, const char *fmt, ...); */ +extern int fputs(char *buf, FILE *fp); + +extern char *strerror(int errno); +extern char *strchr(char *cp, int ch); +extern int strncmp(const char *s1, const char *s2, int count); + +extern int errno; + +void process(FILE *fp); +void repair(char *line, char *ref, int toffset); + +int Errs = 0; +char *Name = "stdin"; +int Line = 0; +char *Me; + +/* main --- handle arguments, global vars for errors */ + +int +main(int argc, char **argv) +{ + FILE *fp; + + Me = argv[0]; + + if (argc == 1) + process(stdin); + else + for (argc--, argv++; *argv != NULL; argc--, argv++) { + if (argv[0][0] == '-' && argv[0][1] == '\0') { + Name = "stdin"; + Line = 0; + process(stdin); + } else if ((fp = fopen(*argv, "r")) != NULL) { + Name = *argv; + Line = 0; + process(fp); + fclose(fp); + } else { + fprintf(stderr, "%s: can not open: %s\n", + *argv, strerror(errno)); + Errs++; + } + } + return Errs != 0; +} + +/* isref --- decide if we've seen a texinfo cross reference */ + +int +isref(char *cp) +{ + if (strncmp(cp, "@ref{", 5) == 0) + return 5; + if (strncmp(cp, "@xref{", 6) == 0) + return 6; + if (strncmp(cp, "@pxref{", 7) == 0) + return 7; + return 0; +} + +/* process --- read files, look for references, fix them up */ + +void +process(FILE *fp) +{ + char buf[BUFSIZ]; + char *cp; + int count; + + while (fgets(buf, sizeof buf, fp) != NULL) { + Line++; + cp = strchr(buf, '@'); + if (cp == NULL) { + fputs(buf, stdout); + continue; + } + do { + count = isref(cp); + if (count == 0) { + cp++; + cp = strchr(cp, '@'); + if (cp == NULL) { + fputs(buf, stdout); + goto next; + } + continue; + } + /* got one */ + repair(buf, cp, count); + break; + } while (cp != NULL); + next: ; + } +} + +/* repair --- turn all texinfo cross references into the one argument form */ + +void +repair(char *line, char *ref, int toffset) +{ + int braces = 1; /* have seen first left brace */ + char *cp; + + ref += toffset; + + /* output line up to and including left brace in reference */ + for (cp = line; cp <= ref; cp++) + putchar(*cp); + + /* output node name */ + for (; *cp && *cp != '}' && *cp != ',' && *cp != '\n'; cp++) + putchar(*cp); + + if (*cp != '}') { /* could have been one arg xref */ + /* skip to matching right brace */ + for (; braces > 0; cp++) { + switch (*cp) { + case '@': + cp++; /* blindly skip next character */ + break; + case '{': + braces++; + break; + case '}': + braces--; + break; + case '\n': + case '\0': + Errs++; + fprintf(stderr, + "%s: %s: %d: mismatched braces\n", + Me, Name, Line); + goto out; + default: + break; + } + } + out: + ; + } + + putchar('}'); + if (*cp == '}') + cp++; + + /* now the rest of the line */ + for (; *cp; cp++) + putchar(*cp); + return; +} + +/* strerror --- return error string, delete if in your library */ + +char * +strerror(int errno) +{ + static char buf[100]; + extern int sys_nerr; + extern char *sys_errlist[]; + + if (errno < sys_nerr && errno >= 0) + return sys_errlist[errno]; + + sprintf(buf, "unknown error %d", errno); + return buf; +} |