diff options
Diffstat (limited to '')
| -rw-r--r-- | src/strset.c | 150 | ||||
| -rw-r--r-- | src/strset.h | 52 |
2 files changed, 0 insertions, 202 deletions
diff --git a/src/strset.c b/src/strset.c deleted file mode 100644 index f1a5197d1..000000000 --- a/src/strset.c +++ /dev/null @@ -1,150 +0,0 @@ -/* - * Copyright (C) 2003-2011 The Music Player Daemon Project - * http://www.musicpd.org - * - * This program 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 2 of the License, or - * (at your option) any later version. - * - * This program 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 this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -#include "config.h" -#include "strset.h" - -#include <glib.h> - -#include <assert.h> -#include <string.h> -#include <stdlib.h> - -#define NUM_SLOTS 16384 - -struct strset_slot { - struct strset_slot *next; - const char *value; -}; - -struct strset { - unsigned size; - - struct strset_slot *current_slot; - unsigned next_slot; - - struct strset_slot slots[NUM_SLOTS]; -}; - -static unsigned calc_hash(const char *p) { - unsigned hash = 5381; - - assert(p != NULL); - - while (*p != 0) - hash = (hash << 5) + hash + *p++; - - return hash; -} - -G_GNUC_MALLOC struct strset *strset_new(void) -{ - struct strset *set = g_new0(struct strset, 1); - return set; -} - -void strset_free(struct strset *set) -{ - unsigned i; - - for (i = 0; i < NUM_SLOTS; ++i) { - struct strset_slot *slot = set->slots[i].next, *next; - - while (slot != NULL) { - next = slot->next; - g_free(slot); - slot = next; - } - } - - g_free(set); -} - -void strset_add(struct strset *set, const char *value) -{ - struct strset_slot *base_slot - = &set->slots[calc_hash(value) % NUM_SLOTS]; - struct strset_slot *slot = base_slot; - - if (base_slot->value == NULL) { - /* empty slot - put into base_slot */ - assert(base_slot->next == NULL); - - base_slot->value = value; - ++set->size; - return; - } - - for (slot = base_slot; slot != NULL; slot = slot->next) - if (strcmp(slot->value, value) == 0) - /* found it - do nothing */ - return; - - /* insert it into the slot chain */ - slot = g_new(struct strset_slot, 1); - slot->next = base_slot->next; - slot->value = value; - base_slot->next = slot; - ++set->size; -} - -int strset_get(const struct strset *set, const char *value) -{ - const struct strset_slot *slot = &set->slots[calc_hash(value)]; - - if (slot->value == NULL) - return 0; - - for (slot = slot->next; slot != NULL; slot = slot->next) - if (strcmp(slot->value, value) == 0) - /* found it - do nothing */ - return 1; - - return 0; -} - -unsigned strset_size(const struct strset *set) -{ - return set->size; -} - -void strset_rewind(struct strset *set) -{ - set->current_slot = NULL; - set->next_slot = 0; -} - -const char *strset_next(struct strset *set) -{ - if (set->current_slot != NULL && set->current_slot->next != NULL) { - set->current_slot = set->current_slot->next; - return set->current_slot->value; - } - - while (set->next_slot < NUM_SLOTS && - set->slots[set->next_slot].value == NULL) - ++set->next_slot; - - if (set->next_slot >= NUM_SLOTS) - return NULL; - - set->current_slot = &set->slots[set->next_slot++]; - return set->current_slot->value; -} - diff --git a/src/strset.h b/src/strset.h deleted file mode 100644 index 6965a5823..000000000 --- a/src/strset.h +++ /dev/null @@ -1,52 +0,0 @@ -/* - * Copyright (C) 2003-2011 The Music Player Daemon Project - * http://www.musicpd.org - * - * This program 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 2 of the License, or - * (at your option) any later version. - * - * This program 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 this program; if not, write to the Free Software Foundation, Inc., - * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. - */ - -/** - * "struct strset" is a hashed string set: you can add strings to this - * library, and it stores them as a set of unique strings. You can - * get the size of the set, and you can enumerate through all values. - * - * It is important to note that the strset does not copy the string - * values - it stores the exact pointers it was given in strset_add(). - */ - -#ifndef MPD_STRSET_H -#define MPD_STRSET_H - -#include "gcc.h" - -struct strset; - -gcc_malloc -struct strset * -strset_new(void); - -void strset_free(struct strset *set); - -void strset_add(struct strset *set, const char *value); - -int strset_get(const struct strset *set, const char *value); - -unsigned strset_size(const struct strset *set); - -void strset_rewind(struct strset *set); - -const char *strset_next(struct strset *set); - -#endif |