89 lines
2 KiB
C
89 lines
2 KiB
C
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/*
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sysutil: generic utilities to interact with the OS (signals, paths)
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copyright ?-2014 by the mpg123 project - free software under the terms of the LGPL 2.1
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see COPYING and AUTHORS files in distribution or http://mpg123.org
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initially written by Michael Hipp (dissected/renamed by Thomas Orgis)
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*/
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#include "mpg123app.h"
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#include <sys/stat.h>
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#include "sysutil.h"
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#include "common/debug.h"
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#if 0
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/* removed the strndup for better portability */
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/*
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* Allocate space for a new string containing the first
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* "num" characters of "src". The resulting string is
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* always zero-terminated. Returns NULL if malloc fails.
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*/
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char *strndup (const char *src, int num)
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{
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char *dst;
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if (!(dst = (char *) malloc(num+1)))
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return (NULL);
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dst[num] = '\0';
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return (strncpy(dst, src, num));
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}
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#endif
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size_t dir_length(const char *path)
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{
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char * slashpos = strrchr(path, '/');
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return (slashpos ? slashpos-path : 0);
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}
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/*
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* Split "path" into directory and filename components.
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*
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* Return value is 0 if no directory was specified (i.e.
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* "path" does not contain a '/'), OR if the directory
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* is the same as on the previous call to this function.
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*
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* Return value is 1 if a directory was specified AND it
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* is different from the previous one (if any).
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*/
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int split_dir_file (const char *path, char **dname, char **fname)
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{
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static char *lastdir = NULL;
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char *slashpos;
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if ((slashpos = strrchr(path, '/'))) {
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*fname = slashpos + 1;
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*dname = INT123_compat_strdup(path); /* , 1 + slashpos - path); */
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if(!(*dname)) {
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perror("failed to allocate memory for dir name");
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return 0;
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}
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(*dname)[1 + slashpos - path] = 0;
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if (lastdir && !strcmp(lastdir, *dname)) {
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/*** same as previous directory ***/
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free (*dname);
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*dname = lastdir;
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return 0;
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}
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else {
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/*** different directory ***/
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if (lastdir)
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free (lastdir);
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lastdir = *dname;
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return 1;
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}
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}
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else {
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/*** no directory specified ***/
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if (lastdir) {
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free (lastdir);
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lastdir = NULL;
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};
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*dname = NULL;
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*fname = (char *)path;
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return 0;
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}
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}
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