--- /dev/null
+/*
+ * wildcard.c
+ *
+ * Wildcard matching functions.
+ */
+
+/*
+ * Copyright (C) 2013 Eric Biggers
+ *
+ * This file is part of wimlib, a library for working with WIM files.
+ *
+ * wimlib is free software; you can redistribute it and/or modify it under the
+ * terms of the GNU General Public License as published by the Free
+ * Software Foundation; either version 3 of the License, or (at your option)
+ * any later version.
+ *
+ * wimlib is distributed in the hope that it will be useful, but WITHOUT ANY
+ * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
+ * A PARTICULAR PURPOSE. See the GNU General Public License for more
+ * details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with wimlib; if not, see http://www.gnu.org/licenses/.
+ */
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include "wimlib/dentry.h"
+#include "wimlib/encoding.h"
+#include "wimlib/error.h"
+#include "wimlib/metadata.h"
+#include "wimlib/wildcard.h"
+
+struct match_dentry_ctx {
+ int (*consume_path)(const tchar *, void *, bool);
+ void *consume_path_ctx;
+ size_t consume_path_count;
+ tchar *expanded_path;
+ size_t expanded_path_len;
+ size_t expanded_path_alloc_len;
+ tchar *wildcard_path;
+ size_t cur_component_offset;
+ size_t cur_component_len;
+ bool case_insensitive;
+};
+
+static bool
+match_wildcard(const tchar *string, tchar *wildcard,
+ size_t wildcard_len, bool case_insensitive)
+{
+ char orig;
+ int flags;
+ int ret;
+
+ orig = wildcard[wildcard_len];
+ wildcard[wildcard_len] = T('\0');
+
+ /* Warning: in Windows builds fnmatch() calls a replacement function.
+ * Also, FNM_CASEFOLD is a GNU extension and it is defined to 0 if not
+ * available. */
+ flags = FNM_NOESCAPE;
+ if (case_insensitive)
+ flags |= FNM_CASEFOLD;
+ ret = fnmatch(wildcard, string, flags);
+
+ wildcard[wildcard_len] = orig;
+ return (ret == 0);
+}
+
+static int
+expand_wildcard_recursive(struct wim_dentry *cur_dentry,
+ struct match_dentry_ctx *ctx);
+
+enum {
+ WILDCARD_STATUS_DONE_FULLY,
+ WILDCARD_STATUS_DONE_TRAILING_SLASHES,
+ WILDCARD_STATUS_NOT_DONE,
+};
+
+static int
+wildcard_status(const tchar *wildcard)
+{
+ if (*wildcard == T('\0'))
+ return WILDCARD_STATUS_DONE_FULLY;
+ while (is_any_path_separator(*wildcard))
+ wildcard++;
+ if (*wildcard == T('\0'))
+ return WILDCARD_STATUS_DONE_TRAILING_SLASHES;
+
+ return WILDCARD_STATUS_NOT_DONE;
+}
+
+static int
+match_dentry(struct wim_dentry *cur_dentry, void *_ctx)
+{
+ struct match_dentry_ctx *ctx = _ctx;
+ tchar *name;
+ size_t name_len;
+ int ret;
+
+ if (cur_dentry->file_name_nbytes == 0)
+ return 0;
+
+#if TCHAR_IS_UTF16LE
+ name = cur_dentry->file_name;
+ name_len = cur_dentry->file_name_nbytes;
+#else
+ ret = utf16le_to_tstr(cur_dentry->file_name,
+ cur_dentry->file_name_nbytes,
+ &name, &name_len);
+ if (ret)
+ return ret;
+#endif
+ name_len /= sizeof(tchar);
+
+ if (match_wildcard(name,
+ &ctx->wildcard_path[ctx->cur_component_offset],
+ ctx->cur_component_len,
+ ctx->case_insensitive))
+ {
+ size_t len_needed = ctx->expanded_path_len + 1 + name_len + 1;
+ size_t expanded_path_len_save;
+
+ if (len_needed > ctx->expanded_path_alloc_len) {
+ tchar *expanded_path;
+
+ expanded_path = REALLOC(ctx->expanded_path,
+ len_needed * sizeof(ctx->expanded_path[0]));
+ if (expanded_path == NULL) {
+ ret = WIMLIB_ERR_NOMEM;
+ goto out_free_name;
+ }
+ ctx->expanded_path = expanded_path;
+ ctx->expanded_path_alloc_len = len_needed;
+ }
+ expanded_path_len_save = ctx->expanded_path_len;
+
+ ctx->expanded_path[ctx->expanded_path_len++] = WIM_PATH_SEPARATOR;
+ tmemcpy(&ctx->expanded_path[ctx->expanded_path_len],
+ name, name_len);
+ ctx->expanded_path_len += name_len;
+ ctx->expanded_path[ctx->expanded_path_len] = T('\0');
+
+ switch (wildcard_status(&ctx->wildcard_path[
+ ctx->cur_component_offset +
+ ctx->cur_component_len]))
+ {
+ case WILDCARD_STATUS_DONE_TRAILING_SLASHES:
+ if (!dentry_is_directory(cur_dentry)) {
+ ret = 0;
+ break;
+ }
+ /* Fall through */
+ case WILDCARD_STATUS_DONE_FULLY:
+ ret = (*ctx->consume_path)(ctx->expanded_path,
+ ctx->consume_path_ctx,
+ false);
+ ctx->consume_path_count++;
+ break;
+ case WILDCARD_STATUS_NOT_DONE:
+ ret = expand_wildcard_recursive(cur_dentry, ctx);
+ break;
+ }
+ ctx->expanded_path_len = expanded_path_len_save;
+ ctx->expanded_path[expanded_path_len_save] = T('\0');
+ } else {
+ ret = 0;
+ }
+
+out_free_name:
+#if !TCHAR_IS_UTF16LE
+ FREE(name);
+#endif
+ return ret;
+}
+
+static int
+expand_wildcard_recursive(struct wim_dentry *cur_dentry,
+ struct match_dentry_ctx *ctx)
+{
+ tchar *w;
+ size_t begin;
+ size_t end;
+ size_t len;
+ size_t offset_save;
+ size_t len_save;
+ int ret;
+
+ w = ctx->wildcard_path;
+
+ begin = ctx->cur_component_offset + ctx->cur_component_len;
+ while (is_any_path_separator(w[begin]))
+ begin++;
+
+ end = begin;
+
+ while (w[end] != T('\0') && !is_any_path_separator(w[end]))
+ end++;
+
+ len = end - begin;
+
+ if (len == 0)
+ return 0;
+
+ offset_save = ctx->cur_component_offset;
+ len_save = ctx->cur_component_len;
+
+ ctx->cur_component_offset = begin;
+ ctx->cur_component_len = len;
+
+ ret = for_dentry_child(cur_dentry, match_dentry, ctx);
+
+ ctx->cur_component_len = len_save;
+ ctx->cur_component_offset = offset_save;
+
+ return ret;
+}
+
+static int
+expand_wildcard(WIMStruct *wim,
+ const tchar *wildcard_path,
+ int (*consume_path)(const tchar *, void *, bool),
+ void *consume_path_ctx,
+ u32 flags)
+{
+ struct wim_dentry *root;
+ int ret;
+
+ root = wim_root_dentry(wim);
+ if (root == NULL)
+ goto no_match;
+
+ struct match_dentry_ctx ctx = {
+ .consume_path = consume_path,
+ .consume_path_ctx = consume_path_ctx,
+ .consume_path_count = 0,
+ .expanded_path = MALLOC(256 * sizeof(ctx.expanded_path[0])),
+ .expanded_path_len = 0,
+ .expanded_path_alloc_len = 256,
+ .wildcard_path = TSTRDUP(wildcard_path),
+ .cur_component_offset = 0,
+ .cur_component_len = 0,
+ .case_insensitive = ((flags & WILDCARD_FLAG_CASE_INSENSITIVE) != 0),
+ };
+
+ if (ctx.expanded_path == NULL || ctx.wildcard_path == NULL) {
+ FREE(ctx.expanded_path);
+ FREE(ctx.wildcard_path);
+ return WIMLIB_ERR_NOMEM;
+ }
+
+ ret = expand_wildcard_recursive(root, &ctx);
+ FREE(ctx.expanded_path);
+ FREE(ctx.wildcard_path);
+ if (ret == 0 && ctx.consume_path_count == 0)
+ goto no_match;
+ return ret;
+
+no_match:
+ ret = 0;
+ if (flags & WILDCARD_FLAG_USE_LITERAL_IF_NO_MATCHES)
+ ret = (*consume_path)(wildcard_path, consume_path_ctx, true);
+
+ if (flags & WILDCARD_FLAG_WARN_IF_NO_MATCH)
+ WARNING("No matches for wildcard path \"%"TS"\"", wildcard_path);
+
+ if (flags & WILDCARD_FLAG_ERROR_IF_NO_MATCH) {
+ ERROR("No matches for wildcard path \"%"TS"\"", wildcard_path);
+ ret = WIMLIB_ERR_PATH_DOES_NOT_EXIST;
+ }
+ return ret;
+}
+
+struct expanded_paths_ctx {
+ tchar **expanded_paths;
+ size_t num_expanded_paths;
+ size_t alloc_length;
+};
+
+static int
+append_path_cb(const tchar *path, void *_ctx, bool may_need_trans)
+{
+ struct expanded_paths_ctx *ctx = _ctx;
+ tchar *path_dup;
+
+ if (ctx->num_expanded_paths == ctx->alloc_length) {
+ tchar **new_paths;
+ size_t new_alloc_length = max(ctx->alloc_length + 8,
+ ctx->alloc_length * 3 / 2);
+
+ new_paths = REALLOC(ctx->expanded_paths,
+ new_alloc_length * sizeof(new_paths[0]));
+ if (new_paths == NULL)
+ return WIMLIB_ERR_NOMEM;
+ ctx->expanded_paths = new_paths;
+ ctx->alloc_length = new_alloc_length;
+ }
+ path_dup = TSTRDUP(path);
+ if (path_dup == NULL)
+ return WIMLIB_ERR_NOMEM;
+ if (may_need_trans) {
+ for (tchar *p = path_dup; *p; p++)
+ if (is_any_path_separator(*p))
+ *p = WIM_PATH_SEPARATOR;
+ }
+ ctx->expanded_paths[ctx->num_expanded_paths++] = path_dup;
+ return 0;
+}
+
+int
+expand_wildcard_wim_paths(WIMStruct *wim,
+ const char * const *wildcards,
+ size_t num_wildcards,
+ tchar ***expanded_paths_ret,
+ size_t *num_expanded_paths_ret,
+ u32 flags)
+{
+ int ret;
+ struct expanded_paths_ctx ctx = {
+ .expanded_paths = NULL,
+ .num_expanded_paths = 0,
+ .alloc_length = 0,
+ };
+ for (size_t i = 0; i < num_wildcards; i++) {
+ ret = expand_wildcard(wim, wildcards[i], append_path_cb, &ctx,
+ flags);
+ if (ret)
+ goto out_free;
+ }
+ *expanded_paths_ret = ctx.expanded_paths;
+ *num_expanded_paths_ret = ctx.num_expanded_paths;
+ return 0;
+
+out_free:
+ for (size_t i = 0; i < ctx.num_expanded_paths; i++)
+ FREE(ctx.expanded_paths[i]);
+ FREE(ctx.expanded_paths);
+ return ret;
+}
projects / wimlib / blobdiff