--- /dev/null
+/*
+ * lmo - Lua Machine Objects - Base functions
+ *
+ * Copyright (C) 2009-2010 Jo-Philipp Wich <xm@subsignal.org>
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "template_lmo.h"
+
+/*
+ * Hash function from http://www.azillionmonkeys.com/qed/hash.html
+ * Copyright (C) 2004-2008 by Paul Hsieh
+ */
+
+uint32_t sfh_hash(const char *data, int len)
+{
+ uint32_t hash = len, tmp;
+ int rem;
+
+ if (len <= 0 || data == NULL) return 0;
+
+ rem = len & 3;
+ len >>= 2;
+
+ /* Main loop */
+ for (;len > 0; len--) {
+ hash += sfh_get16(data);
+ tmp = (sfh_get16(data+2) << 11) ^ hash;
+ hash = (hash << 16) ^ tmp;
+ data += 2*sizeof(uint16_t);
+ hash += hash >> 11;
+ }
+
+ /* Handle end cases */
+ switch (rem) {
+ case 3: hash += sfh_get16(data);
+ hash ^= hash << 16;
+ hash ^= data[sizeof(uint16_t)] << 18;
+ hash += hash >> 11;
+ break;
+ case 2: hash += sfh_get16(data);
+ hash ^= hash << 11;
+ hash += hash >> 17;
+ break;
+ case 1: hash += *data;
+ hash ^= hash << 10;
+ hash += hash >> 1;
+ }
+
+ /* Force "avalanching" of final 127 bits */
+ hash ^= hash << 3;
+ hash += hash >> 5;
+ hash ^= hash << 4;
+ hash += hash >> 17;
+ hash ^= hash << 25;
+ hash += hash >> 6;
+
+ return hash;
+}
+
+uint32_t lmo_canon_hash(const char *str, int len)
+{
+ char res[4096];
+ char *ptr, prev;
+ int off;
+
+ if (!str || len >= sizeof(res))
+ return 0;
+
+ for (prev = ' ', ptr = res, off = 0; off < len; prev = *str, off++, str++)
+ {
+ if (isspace(*str))
+ {
+ if (!isspace(prev))
+ *ptr++ = ' ';
+ }
+ else
+ {
+ *ptr++ = *str;
+ }
+ }
+
+ if ((ptr > res) && isspace(*(ptr-1)))
+ ptr--;
+
+ return sfh_hash(res, ptr - res);
+}
+
+lmo_archive_t * lmo_open(const char *file)
+{
+ int in = -1;
+ uint32_t idx_offset = 0;
+ struct stat s;
+
+ lmo_archive_t *ar = NULL;
+
+ if (stat(file, &s) == -1)
+ goto err;
+
+ if ((in = open(file, O_RDONLY)) == -1)
+ goto err;
+
+ if ((ar = (lmo_archive_t *)malloc(sizeof(*ar))) != NULL)
+ {
+ memset(ar, 0, sizeof(*ar));
+
+ ar->fd = in;
+ ar->size = s.st_size;
+
+ fcntl(ar->fd, F_SETFD, fcntl(ar->fd, F_GETFD) | FD_CLOEXEC);
+
+ if ((ar->mmap = mmap(NULL, ar->size, PROT_READ, MAP_SHARED, ar->fd, 0)) == MAP_FAILED)
+ goto err;
+
+ idx_offset = ntohl(*((const uint32_t *)
+ (ar->mmap + ar->size - sizeof(uint32_t))));
+
+ if (idx_offset >= ar->size)
+ goto err;
+
+ ar->index = (lmo_entry_t *)(ar->mmap + idx_offset);
+ ar->length = (ar->size - idx_offset - sizeof(uint32_t)) / sizeof(lmo_entry_t);
+ ar->end = ar->mmap + ar->size;
+
+ return ar;
+ }
+
+err:
+ if (in > -1)
+ close(in);
+
+ if (ar != NULL)
+ {
+ if ((ar->mmap != NULL) && (ar->mmap != MAP_FAILED))
+ munmap(ar->mmap, ar->size);
+
+ free(ar);
+ }
+
+ return NULL;
+}
+
+void lmo_close(lmo_archive_t *ar)
+{
+ if (ar != NULL)
+ {
+ if ((ar->mmap != NULL) && (ar->mmap != MAP_FAILED))
+ munmap(ar->mmap, ar->size);
+
+ close(ar->fd);
+ free(ar);
+
+ ar = NULL;
+ }
+}
+
+
+lmo_catalog_t *_lmo_catalogs = NULL;
+lmo_catalog_t *_lmo_active_catalog = NULL;
+
+int lmo_load_catalog(const char *lang, const char *dir)
+{
+ DIR *dh = NULL;
+ char pattern[16];
+ char path[PATH_MAX];
+ struct dirent *de = NULL;
+
+ lmo_archive_t *ar = NULL;
+ lmo_catalog_t *cat = NULL;
+
+ if (!lmo_change_catalog(lang))
+ return 0;
+
+ if (!dir || !(dh = opendir(dir)))
+ goto err;
+
+ if (!(cat = malloc(sizeof(*cat))))
+ goto err;
+
+ memset(cat, 0, sizeof(*cat));
+
+ snprintf(cat->lang, sizeof(cat->lang), "%s", lang);
+ snprintf(pattern, sizeof(pattern), "*.%s.lmo", lang);
+
+ while ((de = readdir(dh)) != NULL)
+ {
+ if (!fnmatch(pattern, de->d_name, 0))
+ {
+ snprintf(path, sizeof(path), "%s/%s", dir, de->d_name);
+ ar = lmo_open(path);
+
+ if (ar)
+ {
+ ar->next = cat->archives;
+ cat->archives = ar;
+ }
+ }
+ }
+
+ closedir(dh);
+
+ cat->next = _lmo_catalogs;
+ _lmo_catalogs = cat;
+
+ if (!_lmo_active_catalog)
+ _lmo_active_catalog = cat;
+
+ return 0;
+
+err:
+ if (dh) closedir(dh);
+ if (cat) free(cat);
+
+ return -1;
+}
+
+int lmo_change_catalog(const char *lang)
+{
+ lmo_catalog_t *cat;
+
+ for (cat = _lmo_catalogs; cat; cat = cat->next)
+ {
+ if (!strncmp(cat->lang, lang, sizeof(cat->lang)))
+ {
+ _lmo_active_catalog = cat;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+static lmo_entry_t * lmo_find_entry(lmo_archive_t *ar, uint32_t hash)
+{
+ unsigned int m, l, r;
+ uint32_t k;
+
+ l = 0;
+ r = ar->length - 1;
+
+ while (1)
+ {
+ m = l + ((r - l) / 2);
+
+ if (r < l)
+ break;
+
+ k = ntohl(ar->index[m].key_id);
+
+ if (k == hash)
+ return &ar->index[m];
+
+ if (k > hash)
+ {
+ if (!m)
+ break;
+
+ r = m - 1;
+ }
+ else
+ {
+ l = m + 1;
+ }
+ }
+
+ return NULL;
+}
+
+int lmo_translate(const char *key, int keylen, char **out, int *outlen)
+{
+ uint32_t hash;
+ lmo_entry_t *e;
+ lmo_archive_t *ar;
+
+ if (!key || !_lmo_active_catalog)
+ return -2;
+
+ hash = lmo_canon_hash(key, keylen);
+
+ for (ar = _lmo_active_catalog->archives; ar; ar = ar->next)
+ {
+ if ((e = lmo_find_entry(ar, hash)) != NULL)
+ {
+ *out = ar->mmap + ntohl(e->offset);
+ *outlen = ntohl(e->length);
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
+void lmo_close_catalog(const char *lang)
+{
+ lmo_archive_t *ar, *next;
+ lmo_catalog_t *cat, *prev;
+
+ for (prev = NULL, cat = _lmo_catalogs; cat; prev = cat, cat = cat->next)
+ {
+ if (!strncmp(cat->lang, lang, sizeof(cat->lang)))
+ {
+ if (prev)
+ prev->next = cat->next;
+ else
+ _lmo_catalogs = cat->next;
+
+ for (ar = cat->archives; ar; ar = next)
+ {
+ next = ar->next;
+ lmo_close(ar);
+ }
+
+ free(cat);
+ break;
+ }
+ }
+}
projects / project / luci.git / blobdiff