First Commit

3rdparty/libzip/lib/zip_name_locate.c

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+/*
+  zip_name_locate.c -- get index by name
+  Copyright (C) 1999-2022 Dieter Baron and Thomas Klausner
+
+  This file is part of libzip, a library to manipulate ZIP archives.
+  The authors can be contacted at <info@libzip.org>
+
+  Redistribution and use in source and binary forms, with or without
+  modification, are permitted provided that the following conditions
+  are met:
+  1. Redistributions of source code must retain the above copyright
+     notice, this list of conditions and the following disclaimer.
+  2. Redistributions in binary form must reproduce the above copyright
+     notice, this list of conditions and the following disclaimer in
+     the documentation and/or other materials provided with the
+     distribution.
+  3. The names of the authors may not be used to endorse or promote
+     products derived from this software without specific prior
+     written permission.
+
+  THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
+  OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+  WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+  ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
+  DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
+  GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+  INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
+  IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
+  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
+  IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+
+#include <string.h>
+#ifdef HAVE_STRINGS_H
+#include <strings.h>
+#endif
+
+#include "zipint.h"
+
+
+ZIP_EXTERN zip_int64_t
+zip_name_locate(zip_t *za, const char *fname, zip_flags_t flags) {
+    return _zip_name_locate(za, fname, flags, &za->error);
+}
+
+
+zip_int64_t
+_zip_name_locate(zip_t *za, const char *fname, zip_flags_t flags, zip_error_t *error) {
+    int (*cmp)(const char *, const char *);
+    size_t fname_length;
+    zip_string_t *str = NULL;
+    const char *fn, *p;
+    zip_uint64_t i;
+
+    if (za == NULL) {
+        return -1;
+    }
+
+    if (fname == NULL) {
+        zip_error_set(error, ZIP_ER_INVAL, 0);
+        return -1;
+    }
+
+    fname_length = strlen(fname);
+
+    if (fname_length > ZIP_UINT16_MAX) {
+        zip_error_set(error, ZIP_ER_INVAL, 0);
+        return -1;
+    }
+
+    if ((flags & (ZIP_FL_ENC_UTF_8 | ZIP_FL_ENC_RAW)) == 0 && fname[0] != '\0') {
+        if ((str = _zip_string_new((const zip_uint8_t *)fname, (zip_uint16_t)strlen(fname), flags, error)) == NULL) {
+            return -1;
+        }
+        if ((fname = (const char *)_zip_string_get(str, NULL, 0, error)) == NULL) {
+            _zip_string_free(str);
+            return -1;
+        }
+    }
+
+    if (flags & (ZIP_FL_NOCASE | ZIP_FL_NODIR | ZIP_FL_ENC_RAW | ZIP_FL_ENC_STRICT)) {
+        /* can't use hash table */
+        cmp = (flags & ZIP_FL_NOCASE) ? strcasecmp : strcmp;
+
+        for (i = 0; i < za->nentry; i++) {
+            fn = _zip_get_name(za, i, flags, error);
+
+            /* newly added (partially filled) entry or error */
+            if (fn == NULL)
+                continue;
+
+            if (flags & ZIP_FL_NODIR) {
+                p = strrchr(fn, '/');
+                if (p)
+                    fn = p + 1;
+            }
+
+            if (cmp(fname, fn) == 0) {
+                _zip_error_clear(error);
+                _zip_string_free(str);
+                return (zip_int64_t)i;
+            }
+        }
+
+        zip_error_set(error, ZIP_ER_NOENT, 0);
+        _zip_string_free(str);
+        return -1;
+    }
+    else {
+        zip_int64_t ret = _zip_hash_lookup(za->names, (const zip_uint8_t *)fname, flags, error);
+        _zip_string_free(str);
+        return ret;
+    }
+}