mirror of https://github.com/vivier/EMILE.git
127 lines
2.5 KiB
C
127 lines
2.5 KiB
C
/*
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*
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* (c) 2005 Laurent Vivier <Laurent@Vivier.EU>
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*
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "libiso9660.h"
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#include "iso9660.h"
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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((stream_DIR*)dir)) != NULL)
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{
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iso9660_name((stream_VOLUME*)volume, idr, name_buf);
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if (strcmp(name, name_buf) == 0)
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{
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result = idr_new(idr);
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iso9660_closedir((stream_DIR*)dir);
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return result;
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}
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}
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iso9660_closedir((stream_DIR*)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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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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stream_DIR* iso9660_opendir(stream_VOLUME *volume, 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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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 (stream_DIR*)dir;
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}
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