133 lines
2.6 KiB
C
133 lines
2.6 KiB
C
/*
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*
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* (c) 2005-2009 Laurent Vivier <Laurent@vivier.eu>
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*
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* This file has been copied from EMILE, http://emile.sf.net
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*
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*/
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#include "libiso9660.h"
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static inline int iso9660_is_directory(struct iso_directory_record * idr)
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{
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return ((idr->flags[0] & 2) != 0);
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}
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static iso9660_DIR* iso9660_opendir_node(iso9660_VOLUME *volume, struct iso_directory_record *node)
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{
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iso9660_DIR *dir;
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dir = (iso9660_DIR*)malloc(sizeof(iso9660_DIR));
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if (dir == NULL)
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return NULL;
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dir->extent = isonum_733((char *)node->extent);
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dir->len = isonum_733((char *)node->size);
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dir->index = sizeof (dir->buffer);
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dir->volume = volume;
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return dir;
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}
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static struct iso_directory_record* idr_new(struct iso_directory_record* idr)
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{
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struct iso_directory_record* result;
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int size = sizeof(*idr) + (int)idr->name_len[0];
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result = (struct iso_directory_record*)malloc(size);
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memcpy(result, idr, size);
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return result;
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}
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static struct iso_directory_record * seek_name(iso9660_VOLUME *volume,
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struct iso_directory_record *idr,
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char *name)
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{
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struct iso_directory_record *result;
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char name_buf[256];
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iso9660_DIR *dir;
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dir = iso9660_opendir_node(volume, idr);
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if (dir == NULL)
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return NULL;
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while ((idr = iso9660_readdir(dir)) != NULL)
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{
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iso9660_name(volume, idr, name_buf);
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if (strcasecmp(name, name_buf) == 0)
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{
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result = idr_new(idr);
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iso9660_closedir(dir);
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return result;
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}
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}
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iso9660_closedir(dir);
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return NULL;
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}
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struct iso_directory_record* iso9660_get_node(
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iso9660_VOLUME *volume,
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struct iso_directory_record *dirnode,
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const char *path)
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{
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struct iso_directory_record* result;
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struct iso_directory_record* current;
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char name[256];
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int i;
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current = idr_new(dirnode);
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while(1)
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{
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/* ignore head '\' */
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while (*path && *path == '\\')
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path++;
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if (*path == 0)
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break;
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/* extract first path component */
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i = 0;
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while (*path && *path != '\\')
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name[i++] = *path++;
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name[i] = 0;
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/* seek first component in current directory */
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result = seek_name(volume, current, name);
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if (result == NULL)
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return NULL;
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free(current);
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current = result;
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}
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return current;
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}
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iso9660_DIR* iso9660_opendir(iso9660_VOLUME *volume, const char *name)
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{
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iso9660_DIR *dir;
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struct iso_directory_record *node;
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node = iso9660_get_root_node((iso9660_VOLUME*)volume);
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if (node == NULL)
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return NULL;
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node = iso9660_get_node((iso9660_VOLUME*)volume, node, name);
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if (node == NULL)
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return NULL;
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if (!iso9660_is_directory(node)) {
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free(node);
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return NULL;
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}
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dir = iso9660_opendir_node((iso9660_VOLUME*)volume, node);
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free(node);
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dir->volume = (iso9660_VOLUME*)volume;
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return dir;
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}
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