Support mangling of ISO-9660:1999 file names.
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2
TODO
2
TODO
@ -36,6 +36,6 @@ OK #00002 (node.h) -> handle deletion of each kind of node
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FIXME
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=====
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#00001 (iso1999.c) -> Mangle ISO 9660:1999 names
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OK #00001 (iso1999.c) -> Mangle ISO 9660:1999 names
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OK #00002 (joliet.c) -> Mangle Joliet names
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@ -15,6 +15,7 @@
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#include "eltorito.h"
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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static
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@ -286,6 +287,209 @@ void sort_tree(Iso1999Node *root)
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}
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}
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static
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int mangle_single_dir(Ecma119Image *img, Iso1999Node *dir)
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{
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int ret;
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int i, nchildren;
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Iso1999Node **children;
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IsoHTable *table;
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int need_sort = 0;
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nchildren = dir->info.dir->nchildren;
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children = dir->info.dir->children;
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/* a hash table will temporary hold the names, for fast searching */
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ret = iso_htable_create((nchildren * 100) / 80, iso_str_hash,
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(compare_function_t)strcmp, &table);
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if (ret < 0) {
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return ret;
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}
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for (i = 0; i < nchildren; ++i) {
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char *name = children[i]->name;
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ret = iso_htable_add(table, name, name);
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if (ret < 0) {
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goto mangle_cleanup;
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}
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}
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for (i = 0; i < nchildren; ++i) {
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char *name, *ext;
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char full_name[208];
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int max; /* computed max len for name, without extension */
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int j = i;
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int digits = 1; /* characters to change per name */
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/* first, find all child with same name */
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while (j + 1 < nchildren &&
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!cmp_node(children + i, children + j + 1)) {
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++j;
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}
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if (j == i) {
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/* name is unique */
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continue;
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}
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/*
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* A max of 7 characters is good enought, it allows handling up to
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* 9,999,999 files with same name.
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*/
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while (digits < 8) {
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int ok, k;
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char *dot;
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int change = 0; /* number to be written */
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/* copy name to buffer */
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strcpy(full_name, children[i]->name);
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/* compute name and extension */
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dot = strrchr(full_name, '.');
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if (dot != NULL && children[i]->type != ISO1999_DIR) {
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/*
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* File (not dir) with extension.
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*/
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int extlen;
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full_name[dot - full_name] = '\0';
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name = full_name;
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ext = dot + 1;
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extlen = strlen(ext);
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max = 207 - extlen - 1 - digits;
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if (max <= 0) {
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/* this can happen if extension is too long */
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if (extlen + max > 3) {
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/*
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* reduce extension len, to give name an extra char
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* note that max is negative or 0
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*/
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extlen = extlen + max - 1;
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ext[extlen] = '\0';
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max = 207 - extlen - 1 - digits;
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} else {
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/*
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* error, we don't support extensions < 3
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* This can't happen with current limit of digits.
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*/
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ret = ISO_ERROR;
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goto mangle_cleanup;
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}
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}
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/* ok, reduce name by digits */
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if (name + max < dot) {
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name[max] = '\0';
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}
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} else {
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/* Directory, or file without extension */
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if (children[i]->type == ISO1999_DIR) {
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dot = NULL; /* dots have no meaning in dirs */
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}
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max = 207 - digits;
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name = full_name;
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if (max < strlen(name)) {
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name[max] = '\0';
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}
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/* let ext be an empty string */
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ext = name + strlen(name);
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}
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ok = 1;
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/* change name of each file */
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for (k = i; k <= j; ++k) {
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char tmp[208];
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char fmt[16];
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if (dot != NULL) {
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sprintf(fmt, "%%s%%0%dd.%%s", digits);
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} else {
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sprintf(fmt, "%%s%%0%dd%%s", digits);
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}
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while (1) {
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sprintf(tmp, fmt, name, change, ext);
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++change;
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if (change > int_pow(10, digits)) {
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ok = 0;
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break;
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}
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if (!iso_htable_get(table, tmp, NULL)) {
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/* the name is unique, so it can be used */
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break;
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}
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}
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if (ok) {
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char *new = strdup(tmp);
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if (new == NULL) {
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ret = ISO_OUT_OF_MEM;
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goto mangle_cleanup;
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}
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iso_msg_debug(img->image->id, "\"%s\" renamed to \"%s\"",
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children[k]->name, new);
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iso_htable_remove_ptr(table, children[k]->name, NULL);
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free(children[k]->name);
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children[k]->name = new;
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iso_htable_add(table, new, new);
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/*
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* if we change a name we need to sort again children
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* at the end
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*/
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need_sort = 1;
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} else {
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/* we need to increment digits */
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break;
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}
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}
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if (ok) {
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break;
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} else {
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++digits;
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}
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}
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if (digits == 8) {
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ret = ISO_MANGLE_TOO_MUCH_FILES;
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goto mangle_cleanup;
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}
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i = j;
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}
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/*
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* If needed, sort again the files inside dir
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*/
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if (need_sort) {
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qsort(children, nchildren, sizeof(void*), cmp_node);
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}
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ret = ISO_SUCCESS;
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mangle_cleanup : ;
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iso_htable_destroy(table, NULL);
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return ret;
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}
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static
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int mangle_tree(Ecma119Image *t, Iso1999Node *dir)
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{
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int ret;
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size_t i;
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ret = mangle_single_dir(t, dir);
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if (ret < 0) {
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return ret;
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}
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/* recurse */
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for (i = 0; i < dir->info.dir->nchildren; ++i) {
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if (dir->info.dir->children[i]->type == ISO1999_DIR) {
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ret = mangle_tree(t, dir->info.dir->children[i]);
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if (ret < 0) {
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/* error */
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return ret;
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}
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}
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}
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return ISO_SUCCESS;
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}
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static
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int iso1999_tree_create(Ecma119Image *t)
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{
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@ -311,11 +515,11 @@ int iso1999_tree_create(Ecma119Image *t)
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iso_msg_debug(t->image->id, "Sorting the ISO 9660:1999 tree...");
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sort_tree(root);
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/*
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* FIXME #00001 : Mangle ISO 9660:1999 names
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* iso_msg_debug(t->image->id, "Mangling ISO 9660:1999 names...");
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* FIXME ret = mangle_tree(t, 1);
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*/
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iso_msg_debug(t->image->id, "Mangling ISO 9660:1999 names...");
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ret = mangle_tree(t, t->iso1999_root);
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if (ret < 0) {
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return ret;
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}
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return ISO_SUCCESS;
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}
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