X-Git-Url: https://git.librecmc.org/?a=blobdiff_plain;f=lib%2Fhashtable.c;h=0d288d12d991128a6f3d5690e49215d863c3b0dd;hb=afe9e1f197e6d0ee4fa59d56639ca56d5f2ed566;hp=4cdbc95329c0d9d5892d81eed39254fc13796f2a;hpb=a19b0dd62d7b8efc658fa1aa685ff5665878f3ee;p=oweals%2Fu-boot.git diff --git a/lib/hashtable.c b/lib/hashtable.c index 4cdbc95329..0d288d12d9 100644 --- a/lib/hashtable.c +++ b/lib/hashtable.c @@ -1,3 +1,4 @@ +// SPDX-License-Identifier: LGPL-2.1+ /* * This implementation is based on code from uClibc-0.9.30.3 but was * modified and extended for use within U-Boot. @@ -9,21 +10,6 @@ * Copyright (C) 1993, 1995, 1996, 1997, 2002 Free Software Foundation, Inc. * This file is part of the GNU C Library. * Contributed by Ulrich Drepper , 1993. - * - * The GNU C Library is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * The GNU C Library 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 - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with the GNU C Library; if not, write to the Free - * Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - * 02111-1307 USA. */ #include @@ -54,6 +40,9 @@ #define CONFIG_ENV_MAX_ENTRIES 512 #endif +#define USED_FREE 0 +#define USED_DELETED -1 + #include #include #include @@ -317,7 +306,7 @@ int hsearch_r(ENTRY item, ACTION action, ENTRY ** retval, */ unsigned hval2; - if (htab->table[idx].used == -1 + if (htab->table[idx].used == USED_DELETED && !first_deleted) first_deleted = idx; @@ -349,13 +338,17 @@ int hsearch_r(ENTRY item, ACTION action, ENTRY ** retval, if (idx == hval) break; + if (htab->table[idx].used == USED_DELETED + && !first_deleted) + first_deleted = idx; + /* If entry is found use it. */ ret = _compare_and_overwrite_entry(item, action, retval, htab, flag, hval, idx); if (ret != -1) return ret; } - while (htab->table[idx].used); + while (htab->table[idx].used != USED_FREE); } /* An empty bucket has been found. */ @@ -447,7 +440,7 @@ static void _hdelete(const char *key, struct hsearch_data *htab, ENTRY *ep, free(ep->data); ep->callback = NULL; ep->flags = 0; - htab->table[idx].used = -1; + htab->table[idx].used = USED_DELETED; --htab->filled; } @@ -490,11 +483,11 @@ int hdelete_r(const char *key, struct hsearch_data *htab, int flag) return 1; } +#if !(defined(CONFIG_SPL_BUILD) && !defined(CONFIG_SPL_SAVEENV)) /* * hexport() */ -#ifndef CONFIG_SPL_BUILD /* * Export the data stored in the hash table in linearized form. * @@ -512,7 +505,7 @@ int hdelete_r(const char *key, struct hsearch_data *htab, int flag) * * If the separator character is different from NUL, then any * separator characters and backslash characters in the values will - * be escaped by a preceeding backslash in output. This is needed for + * be escaped by a preceding backslash in output. This is needed for * example to enable multi-line values, especially when the output * shall later be parsed (for example, for re-import). * @@ -556,9 +549,8 @@ static int match_string(int flag, const char *str, const char *pat, void *priv) case H_MATCH_REGEX: { struct slre *slrep = (struct slre *)priv; - struct cap caps[slrep->num_caps + 2]; - if (slre_match(slrep, str, strlen(str), caps)) + if (slre_match(slrep, str, strlen(str), NULL)) return 1; } break; @@ -577,7 +569,7 @@ static int match_entry(ENTRY *ep, int flag, int arg; void *priv = NULL; - for (arg = 1; arg < argc; ++arg) { + for (arg = 0; arg < argc; ++arg) { #ifdef CONFIG_REGEX struct slre slre; @@ -615,8 +607,8 @@ ssize_t hexport_r(struct hsearch_data *htab, const char sep, int flag, return (-1); } - debug("EXPORT table = %p, htab.size = %d, htab.filled = %d, " - "size = %zu\n", htab, htab->size, htab->filled, size); + debug("EXPORT table = %p, htab.size = %d, htab.filled = %d, size = %lu\n", + htab, htab->size, htab->filled, (ulong)size); /* * Pass 1: * search used entries, @@ -636,7 +628,7 @@ ssize_t hexport_r(struct hsearch_data *htab, const char sep, int flag, list[n++] = ep; - totlen += strlen(ep->key) + 2; + totlen += strlen(ep->key); if (sep == '\0') { totlen += strlen(ep->data); @@ -670,8 +662,8 @@ ssize_t hexport_r(struct hsearch_data *htab, const char sep, int flag, /* Check if the user supplied buffer size is sufficient */ if (size) { if (size < totlen + 1) { /* provided buffer too small */ - printf("Env export buffer too small: %zu, " - "but need %zu\n", size, totlen + 1); + printf("Env export buffer too small: %lu, but need %lu\n", + (ulong)size, (ulong)totlen + 1); __set_errno(ENOMEM); return (-1); } @@ -763,8 +755,11 @@ static int drop_var_from_set(const char *name, int nvars, char * vars[]) * * The "flag" argument can be used to control the behaviour: when the * H_NOCLEAR bit is set, then an existing hash table will kept, i. e. - * new data will be added to an existing hash table; otherwise, old - * data will be discarded and a new hash table will be created. + * new data will be added to an existing hash table; otherwise, if no + * vars are passed, old data will be discarded and a new hash table + * will be created. If vars are passed, passed vars that are not in + * the linear list of "name=value" pairs will be removed from the + * current hash table. * * The separator character for the "name=value" pairs can be selected, * so we both support importing from externally stored environment @@ -789,7 +784,7 @@ static int drop_var_from_set(const char *name, int nvars, char * vars[]) int himport_r(struct hsearch_data *htab, const char *env, size_t size, const char sep, int flag, - int nvars, char * const vars[]) + int crlf_is_lf, int nvars, char * const vars[]) { char *data, *sp, *dp, *name, *value; char *localvars[nvars]; @@ -802,19 +797,20 @@ int himport_r(struct hsearch_data *htab, } /* we allocate new space to make sure we can write to the array */ - if ((data = malloc(size)) == NULL) { - debug("himport_r: can't malloc %zu bytes\n", size); + if ((data = malloc(size + 1)) == NULL) { + debug("himport_r: can't malloc %lu bytes\n", (ulong)size + 1); __set_errno(ENOMEM); return 0; } memcpy(data, env, size); + data[size] = '\0'; dp = data; /* make a local copy of the list of variables */ if (nvars) memcpy(localvars, vars, sizeof(vars[0]) * nvars); - if ((flag & H_NOCLEAR) == 0) { + if ((flag & H_NOCLEAR) == 0 && !nvars) { /* Destroy old hash table if one exists */ debug("Destroy Hash Table: %p table = %p\n", htab, htab->table); @@ -830,11 +826,11 @@ int himport_r(struct hsearch_data *htab, * size of 8 per entry (= safety factor of ~5) should provide enough * safety margin for any existing environment definitions and still * allow for more than enough dynamic additions. Note that the - * "size" argument is supposed to give the maximum enviroment size + * "size" argument is supposed to give the maximum environment size * (CONFIG_ENV_SIZE). This heuristics will result in * unreasonably large numbers (and thus memory footprint) for * big flash environments (>8,000 entries for 64 KB - * envrionment size), so we clip it to a reasonable value. + * environment size), so we clip it to a reasonable value. * On the other hand we need to add some more entries for free * space when importing very small buffers. Both boundaries can * be overwritten in the board config file if needed. @@ -854,6 +850,23 @@ int himport_r(struct hsearch_data *htab, } } + if (!size) { + free(data); + return 1; /* everything OK */ + } + if(crlf_is_lf) { + /* Remove Carriage Returns in front of Line Feeds */ + unsigned ignored_crs = 0; + for(;dp < data + size && *dp; ++dp) { + if(*dp == '\r' && + dp < data + size - 1 && *(dp+1) == '\n') + ++ignored_crs; + else + *(dp-ignored_crs) = *dp; + } + size -= ignored_crs; + dp = data; + } /* Parse environment; allow for '\0' and 'sep' as separators */ do { ENTRY e, *rv; @@ -904,6 +917,7 @@ int himport_r(struct hsearch_data *htab, if (*name == 0) { debug("INSERT: unable to use an empty key\n"); __set_errno(EINVAL); + free(data); return 0; } @@ -928,6 +942,9 @@ int himport_r(struct hsearch_data *htab, debug("INSERT: free(data = %p)\n", data); free(data); + if (flag & H_NOCLEAR) + goto end; + /* process variables which were not considered */ for (i = 0; i < nvars; i++) { if (localvars[i] == NULL) @@ -946,6 +963,7 @@ int himport_r(struct hsearch_data *htab, printf("WARNING: '%s' not in imported env, deleting it!\n", localvars[i]); } +end: debug("INSERT: done\n"); return 1; /* everything OK */ }