/******************************************************************** * * * THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. * * USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY * * THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. * * PLEASE READ THESE TERMS BEFORE DISTRIBUTING. * * * * THE Ogg123 SOURCE CODE IS (C) COPYRIGHT 2000-2001 * * by Stan Seibert AND OTHER CONTRIBUTORS * * http://www.xiph.org/ * * * ******************************************************************** last mod: $Id: playlist.c,v 1.3 2002/07/13 17:57:10 volsung Exp $ ********************************************************************/ #include #include #include #include #include #include #include #include #include "playlist.h" #include "i18n.h" /* Work with *BSD differences */ #if !defined(NAME_MAX) && defined(MAXNAMLEN) #define NAME_MAX MAXNAMLEN #endif playlist_element_t *playlist_element_create(char *filename) { playlist_element_t *element = (playlist_element_t *) malloc(sizeof(playlist_t)); if (element == NULL) { fprintf(stderr, _("Error: Out of memory in create_playlist_member().\n")); exit(1); } if (filename == NULL) element->filename = NULL; else { element->filename = strdup(filename); if (element->filename == NULL) { fprintf(stderr, _("Error: Out of memory in create_playlist_member().\n")); exit(1); } } element->next = NULL; return element; } /* Only destroys the current node. Does not affect linked nodes. */ void playlist_element_destroy(playlist_element_t *element) { free(element->filename); free(element); } playlist_t *playlist_create() { playlist_t *list = (playlist_t *) malloc(sizeof(playlist_t)); if (list != NULL) { list->head = playlist_element_create(NULL); list->last = list->head; } return list; } void playlist_destroy(playlist_t *list) { playlist_element_t *next_element; while (list->head != NULL) { next_element = list->head->next; playlist_element_destroy(list->head); list->head = next_element; } free(list); } /* All of the playlist_append_* functions return 1 if append was successful 0 if failure (either directory could not be accessed or playlist on disk could not be opened) */ /* Add this filename to the playlist. Filename will be strdup()'ed. Note that this function will never fail. */ int playlist_append_file(playlist_t *list, char *filename) { list->last->next = playlist_element_create(filename); list->last = list->last->next; return 1; /* No way to fail */ } /* Recursively adds files from the directory and subdirectories */ int playlist_append_directory(playlist_t *list, char *dirname) { DIR *dir; int dir_len = strlen(dirname); struct dirent *entry; struct stat stat_buf; char nextfile[NAME_MAX + 1]; dir = opendir(dirname); if (dir == NULL) { return 0; } entry = readdir(dir); while (entry != NULL) { int sub_len = strlen(entry->d_name); /* Make sure full pathname is within limits and we don't parse the relative directory entries. */ if (dir_len + sub_len + 1 < NAME_MAX && strcmp(entry->d_name, ".") != 0 && strcmp(entry->d_name, "..") != 0 ) { /* Build the new full pathname */ strcpy(nextfile, dirname); strcat(nextfile, "/"); strcat(nextfile, entry->d_name); if (stat(nextfile, &stat_buf) == 0) { /* Decide what type of entry this is */ if (S_ISDIR(stat_buf.st_mode)) { /* Recursively follow directories */ if ( playlist_append_directory(list, nextfile) == 0 ) { fprintf(stderr, _("Warning: Could not read directory %s.\n"), nextfile); } } else { /* Assume everything else is a file of some sort */ playlist_append_file(list, nextfile); } } } entry = readdir(dir); } closedir(dir); return 1; } /* Opens a file containing filenames, one per line, and adds them to the playlist */ int playlist_append_from_file(playlist_t *list, char *playlist_filename) { FILE *fp; char filename[NAME_MAX+1]; struct stat stat_buf; int length; int i; if (strcmp(playlist_filename, "-") == 0) fp = stdin; else fp = fopen(playlist_filename, "r"); if (fp == NULL) return 0; while (!feof(fp)) { if ( fgets(filename, NAME_MAX+1 /* no, really! */, fp) == NULL ) continue; filename[NAME_MAX] = '\0'; /* Just to make sure */ length = strlen(filename); /* Skip blank lines */ for (i = 0; i < length && isspace(filename[i]); i++); if (i == length) continue; /* Crop off last \n if present */ if (filename[length - 1] == '\n') filename[length - 1] = '\0'; if (stat(filename, &stat_buf) == 0) { if (S_ISDIR(stat_buf.st_mode)) { if (playlist_append_directory(list, filename) == 0) fprintf(stderr, _("Warning from playlist %s: " "Could not read directory %s.\n"), playlist_filename, filename); } else { playlist_append_file(list, filename); } } else /* If we can't stat it, it might be a non-disk source */ playlist_append_file(list, filename); } return 1; } /* Return the number of items in the playlist */ int playlist_length(playlist_t *list) { int length; playlist_element_t *element; element = list->head; length = 0; /* don't count head node */ while (element->next != NULL) { length++; element = element->next; } return length; } /* Convert the playlist to an array of strings. Strings are deep copied. Size will be set to the number of elements in the array. */ char **playlist_to_array(playlist_t *list, int *size) { char **array; int i; playlist_element_t *element; *size = playlist_length(list); array = calloc(*size, sizeof(char *)); if (array == NULL) { fprintf(stderr, _("Error: Out of memory in playlist_to_array().\n")); exit(1); } for (i = 0, element = list->head->next; i < *size; i++, element = element->next) { array[i] = strdup(element->filename); if (array[i] == NULL) { fprintf(stderr, _("Error: Out of memory in playlist_to_array().\n")); exit(1); } } return array; } /* Deallocate array and all contained strings created by playlist_to_array. */ void playlist_array_destroy(char **array, int size) { int i; for (i = 0; i < size; i++) free(array[i]); free(array); }