327 lines
7.5 KiB
C
327 lines
7.5 KiB
C
/* $NetBSD: str.c,v 1.14 1999/03/22 05:02:41 hubertf Exp $ */
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static const char *rcsid = "Id: str.c,v 1.5 1997/10/08 07:48:21 charnier Exp";
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#else
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__RCSID("$NetBSD: str.c,v 1.14 1999/03/22 05:02:41 hubertf Exp $");
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#endif
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#endif
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/*
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* FreeBSD install - a package for the installation and maintainance
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* of non-core utilities.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* Jordan K. Hubbard
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* 18 July 1993
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*
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* Miscellaneous string utilities.
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*
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*/
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#include <err.h>
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#include <fnmatch.h>
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#include "lib.h"
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/* Return the filename portion of a path */
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char *
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basename_of(char *str)
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{
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char *slash;
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return ((slash = strrchr(str, '/')) == (char *) NULL) ? str : slash + 1;
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}
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/* Return the dirname portion of a path */
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char *
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dirname_of(const char *path)
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{
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size_t cc;
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char *s;
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char *t;
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if ((s = strrchr(path, '/')) == (char *) NULL) {
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return ".";
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}
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if (s == path) {
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/* "/foo" -> return "/" */
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return "/";
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}
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cc = (size_t)(s - path) + 1;
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if ((t = (char *) malloc(cc)) == (char *) NULL) {
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errx(1, "out of memory in dirname_of");
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}
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(void) memcpy(t, path, cc);
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t[cc] = 0;
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return t;
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}
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/* Get a string parameter as a file spec or as a "contents follow -" spec */
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char *
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get_dash_string(char **s)
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{
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return *s = (**s == '-') ? strdup(*s + 1) : fileGetContents(*s);
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}
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/* Lowercase a whole string */
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void
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str_lowercase(char *s)
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{
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for ( ; *s ; s++) {
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*s = tolower(*s);
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}
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}
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typedef enum deweyop_t {
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GT,
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GE,
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LT,
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LE
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} deweyop_t;
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/* compare two dewey decimal numbers */
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static int
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deweycmp(char *a, deweyop_t op, char *b)
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{
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int ad;
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int bd;
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int cmp;
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for (;;) {
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if (*a == 0 && *b == 0) {
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cmp = 0;
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break;
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}
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ad = bd = 0;
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for (; *a && *a != '.'; a++) {
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ad = (ad * 10) + (*a - '0');
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}
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for (; *b && *b != '.'; b++) {
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bd = (bd * 10) + (*b - '0');
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}
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if ((cmp = ad - bd) != 0) {
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break;
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}
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if (*a == '.') {
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a++;
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}
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if (*b == '.') {
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b++;
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}
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}
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return (op == GE) ? cmp >= 0 : (op == GT) ? cmp > 0 : (op == LE) ? cmp <= 0 : cmp < 0;
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}
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/* perform alternate match on "pkg" against "pattern", */
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/* calling pmatch (recursively) to resolve any other patterns */
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/* return 1 on match, 0 otherwise */
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static int
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alternate_match(const char *pattern, const char *pkg)
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{
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char *sep;
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char buf[FILENAME_MAX];
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char *last;
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char *alt;
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char *cp;
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int cnt;
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int found;
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if ((sep = strchr(pattern, '{')) == (char *) NULL) {
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errx(1, "alternate_match(): '{' expected in `%s'", pattern);
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}
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(void) strncpy(buf, pattern, (size_t)(sep - pattern));
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alt = &buf[sep - pattern];
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last = (char *) NULL;
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for (cnt = 0, cp = sep; *cp && last == (char *) NULL ; cp++) {
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if (*cp == '{') {
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cnt++;
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} else if (*cp == '}' && --cnt == 0 && last == (char *) NULL) {
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last = cp + 1;
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}
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}
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if (cnt != 0) {
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errx(1, "Malformed alternate `%s'", pattern);
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}
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for (found = 0, cp = sep + 1; *sep != '}'; cp = sep + 1) {
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for (cnt = 0, sep = cp; cnt > 0 || (cnt == 0 && *sep != '}' && *sep != ','); sep++) {
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if (*sep == '{') {
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cnt++;
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} else if (*sep == '}') {
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cnt--;
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}
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}
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(void) snprintf(alt, sizeof(buf) - (alt - buf), "%.*s%s", (int) (sep - cp), cp, last);
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if (pmatch(buf, pkg) == 1) {
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found = 1;
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}
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}
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return found;
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}
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/* perform dewey match on "pkg" against "pattern" */
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/* return 1 on match, 0 otherwise */
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static int
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dewey_match(const char *pattern, const char *pkg)
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{
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deweyop_t op;
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char *cp;
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char *sep;
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char *ver;
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char name[FILENAME_MAX];
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int n;
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if ((sep = strpbrk(pattern, "<>")) == NULL) {
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errx(1, "dewey_match(): '<' or '>' expected in `%s'", pattern);
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}
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(void) snprintf(name, sizeof(name), "%.*s", (int) (sep - pattern), pattern);
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op = (*sep == '>') ? (*(sep + 1) == '=') ? GE : GT : (*(sep + 1) == '=') ? LE : LT;
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ver = (op == GE || op == LE) ? sep + 2 : sep + 1;
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n = (int)(sep - pattern);
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if ((cp = strrchr(pkg, '-')) != (char *) NULL) {
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if (strncmp(pkg, name, (size_t)(cp - pkg)) == 0 && n == cp - pkg) {
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if (deweycmp(cp + 1, op, ver)) {
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return 1;
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}
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}
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}
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return 0;
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}
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/* perform glob match on "pkg" against "pattern" */
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/* return 1 on match, 0 otherwise */
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static int
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glob_match(const char *pattern, const char *pkg)
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{
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return fnmatch(pattern, pkg, FNM_PERIOD) == 0;
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}
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/* perform simple match on "pkg" against "pattern" */
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/* return 1 on match, 0 otherwise */
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static int
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simple_match(const char *pattern, const char *pkg)
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{
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return strcmp(pattern, pkg) == 0;
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}
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/* match pkg against pattern, return 1 if matching, 0 else */
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int
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pmatch(const char *pattern, const char *pkg)
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{
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if (strchr(pattern, '{') != (char *) NULL) {
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/* emulate csh-type alternates */
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return alternate_match(pattern, pkg);
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}
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if (strpbrk(pattern, "<>") != (char *) NULL) {
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/* perform relational dewey match on version number */
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return dewey_match(pattern, pkg);
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}
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if (strpbrk(pattern, "*?[]") != (char *) NULL) {
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/* glob match */
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return glob_match(pattern, pkg);
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}
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/* no alternate, dewey or glob match -> simple compare */
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return simple_match(pattern, pkg);
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}
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/* search dir for pattern, calling match(pkg_found, data) for every match */
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/* returns -1 on error, 1 if found, 0 otherwise. */
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int
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findmatchingname(const char *dir, const char *pattern, matchfn match, char *data)
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{
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struct dirent *dp;
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DIR *dirp;
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int found;
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found = 0;
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if ((dirp = opendir(dir)) == (DIR *) NULL) {
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/* warnx("can't opendir dir '%s'", dir); */
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return -1;
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}
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while ((dp = readdir(dirp)) != (struct dirent *) NULL) {
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char tmp[FILENAME_MAX];
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if (strcmp(dp->d_name, ".") == 0 ||
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strcmp(dp->d_name, "..") == 0)
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continue;
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snprintf(tmp, FILENAME_MAX, "%s/%s", dir, dp->d_name);
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if (isfile(tmp)) /* pkgdb, ... */
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continue;
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if (pmatch(pattern, dp->d_name)) {
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if (match) {
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match(dp->d_name, data);
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/* return value ignored for now */
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}
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found = 1;
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}
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}
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(void) closedir(dirp);
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return found;
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}
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/* does the pkgname contain any of the special chars ("{[]?*<>")? */
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/* if so, return 1, else 0 */
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int
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ispkgpattern(const char *pkg)
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{
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return strpbrk(pkg, "<>[]?*{") != NULL;
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}
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/* auxiliary function called by findbestmatchingname() */
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/* if pkg > data */
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static int
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findbestmatchingname_fn(const char *pkg, char *data)
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{
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char *s1, *s2;
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s1 = strrchr(pkg, '-') + 1;
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s2 = strrchr(data, '-') + 1;
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if (data[0] == '\0' || deweycmp(s1, GT, s2)) {
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strcpy(data, pkg);
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}
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return 0;
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}
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/* find best matching filename, i.e. the pkg with the highest
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* matching(!) version */
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/* returns pointer to pkg name (which can be free(3)ed),
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* or NULL if no match is available. */
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char *
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findbestmatchingname(const char *dir, const char *pattern)
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{
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char buf[FILENAME_MAX];
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buf[0]='\0';
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if (findmatchingname(dir, pattern, findbestmatchingname_fn, buf) > 0
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&& buf[0] != '\0') {
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return strdup(buf);
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}
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return NULL;
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}
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/* bounds-checking strncpy */
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char *
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strnncpy(char *to, size_t tosize, char *from, size_t cc)
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{
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size_t len;
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if ((len = cc) >= tosize - 1) {
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len = tosize - 1;
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}
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(void) strncpy(to, from, len);
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to[len] = 0;
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return to;
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}
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