177 lines
3.1 KiB
C
177 lines
3.1 KiB
C
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/*
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To compile as a standalone program:
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gcc -Wall -g -I../.. -DHAVE_CONFIG_H -DSTANDALONE -o abs_path abs_path.c
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*/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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# define __CDIO_CONFIG_H__ 1
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#endif
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#ifdef HAVE_STRING_H
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# include <string.h>
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#endif
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#ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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#endif
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#ifdef HAVE_UNISTD_H
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# include <unistd.h>
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#endif
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#include <stdio.h>
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#ifndef PATH_MAX
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#define PATH_MAX 4096
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#endif
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#ifndef NULL
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# define NULL 0
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#endif
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#ifdef __CYGWIN__
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#undef DOSISH
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#endif
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#if defined __CYGWIN__ || defined DOSISH
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#define DOSISH_UNC
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#define DOSISH_DRIVE_LETTER
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#define FILE_ALT_SEPARATOR '\\'
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#endif
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#ifndef CDIO_FILE_SEPARATOR
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# define CDIO_FILE_SEPARATOR '/'
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#endif
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#if defined __CYGWIN__ || defined DOSISH
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# define FILE_ALT_SEPARATOR '\\'
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#endif
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#ifdef CDIO_FILE_ALT_SEPARATOR
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# define isdirsep(x) ((x) == CDIO_FILE_SEPARATOR || (x) == CDIO_FILE_ALT_SEPARATOR)
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#else
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# define isdirsep(x) ((x) == CDIO_FILE_SEPARATOR)
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#endif
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#define skipprefix(path) (path)
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#ifndef CharNext /* defined as CharNext[AW] on Windows. */
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# define CharNext(p) ((p) + 1)
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#endif
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static char *
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chompdirsep(const char *path)
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{
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while (*path) {
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if (isdirsep(*path)) {
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const char *last = path++;
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while (isdirsep(*path)) path++;
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if (!*path) return (char *)last;
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}
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else {
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path = CharNext(path);
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}
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}
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return (char *)path;
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}
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static char *
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strrdirsep(const char *path)
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{
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char *last = NULL;
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while (*path) {
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if (isdirsep(*path)) {
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const char *tmp = path++;
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while (isdirsep(*path)) path++;
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if (!*path) break;
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last = (char *)tmp;
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}
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else {
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path = CharNext(path);
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}
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}
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return last;
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}
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const char *
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cdio_basename(const char *name)
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{
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const char *p;
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#if defined DOSISH_DRIVE_LETTER || defined DOSISH_UNC
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const char *root;
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#endif
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long f, n = -1;
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name = skipprefix(name);
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#if defined DOSISH_DRIVE_LETTER || defined DOSISH_UNC
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root = name;
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#endif
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while (isdirsep(*name))
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name++;
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if (!*name) {
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p = name - 1;
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f = 1;
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#if defined DOSISH_DRIVE_LETTER || defined DOSISH_UNC
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if (name != root) {
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/* has slashes */
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}
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#ifdef DOSISH_DRIVE_LETTER
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else if (*p == ':') {
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p++;
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f = 0;
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}
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#endif
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#ifdef DOSISH_UNC
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else {
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p = CDIO_FILE_SEPARARATOR;
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}
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#endif
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#endif
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}
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else {
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if (!(p = strrdirsep(name))) {
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p = name;
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}
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else {
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while (isdirsep(*p)) p++; /* skip last / */
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}
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n = chompdirsep(p) - p;
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}
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return p;
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}
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/* If fname isn't absolute, add cwd to it. */
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char *
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cdio_abspath(const char *cwd, char *fname)
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{
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if (isdirsep(*fname)) return fname;
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{
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size_t len = strlen(cwd) + strlen(fname) + 2;
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char* result = calloc(sizeof(char), len);
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snprintf(result, len, "%s%c%s",
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cwd, CDIO_FILE_SEPARATOR, fname);
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return result;
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}
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}
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#define STANDALONE 1
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#ifdef STANDALONE
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int main(int argc, char **argv)
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{
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char *dest;
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char cwd[PATH_MAX];
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getcwd(cwd, sizeof(cwd));
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if (argc != 2) {
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fprintf(stderr, "Usage: %s PATH\n", argv[0]);
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fprintf(stderr,
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" Make PATH absolute\n");
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exit(1);
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}
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dest = cdio_abspath (cwd, argv[1]);
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printf("%s -> %s\n", argv[1], dest);
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exit(0);
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}
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#endif
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