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authorDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-11-24 17:26:33 +0100
committerDavid Oberhollenzer <david.oberhollenzer@sigma-star.at>2019-11-24 17:26:33 +0100
commit2d303a7f0a6076bbf5739bae4f0fa443d0da5203 (patch)
treec92b98e58628233fe5ea4b728d1d40042a1d260e /lib/util
parent67f703a794272d9a241fcaa96b09fdec7b8fc7e7 (diff)
Cleanup: completely move str_table into libsquashfs internals
Signed-off-by: David Oberhollenzer <david.oberhollenzer@sigma-star.at>
Diffstat (limited to 'lib/util')
-rw-r--r--lib/util/Makemodule.am3
-rw-r--r--lib/util/str_table.c174
2 files changed, 1 insertions, 176 deletions
diff --git a/lib/util/Makemodule.am b/lib/util/Makemodule.am
index 07e94e2..426e088 100644
--- a/lib/util/Makemodule.am
+++ b/lib/util/Makemodule.am
@@ -1,5 +1,4 @@
-libutil_la_SOURCES = include/util/util.h include/util/str_table.h
-libutil_la_SOURCES += lib/util/str_table.c lib/util/alloc.c
+libutil_la_SOURCES = include/util/util.h lib/util/alloc.c
libutil_la_CFLAGS = $(AM_CFLAGS)
libutil_la_CPPFLAGS = $(AM_CPPFLAGS)
libutil_la_LDFLAGS = $(AM_LDFLAGS)
diff --git a/lib/util/str_table.c b/lib/util/str_table.c
deleted file mode 100644
index 513b243..0000000
--- a/lib/util/str_table.c
+++ /dev/null
@@ -1,174 +0,0 @@
-/* SPDX-License-Identifier: LGPL-3.0-or-later */
-/*
- * str_table.c
- *
- * Copyright (C) 2019 David Oberhollenzer <goliath@infraroot.at>
- */
-#include "config.h"
-
-#include <stdint.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "sqfs/error.h"
-#include "util/str_table.h"
-#include "util/util.h"
-
-/* R5 hash function (borrowed from reiserfs) */
-static sqfs_u32 strhash(const char *s)
-{
- const signed char *str = (const signed char *)s;
- sqfs_u32 a = 0;
-
- while (*str != '\0') {
- a += *str << 4;
- a += *str >> 4;
- a *= 11;
- str++;
- }
-
- return a;
-}
-
-static int strings_grow(str_table_t *table)
-{
- size_t newsz;
- void *new;
-
- if (table->num_strings < table->max_strings)
- return 0;
-
- newsz = table->max_strings ? (table->max_strings * 2) : 16;
- new = realloc(table->strings, sizeof(table->strings[0]) * newsz);
-
- if (new == NULL)
- return SQFS_ERROR_ALLOC;
-
- table->strings = new;
- table->max_strings = newsz;
- return 0;
-}
-
-int str_table_init(str_table_t *table, size_t size)
-{
- memset(table, 0, sizeof(*table));
-
- table->buckets = alloc_array(size, sizeof(table->buckets[0]));
- table->num_buckets = size;
-
- if (table->buckets == NULL)
- return SQFS_ERROR_ALLOC;
-
- return 0;
-}
-
-void str_table_cleanup(str_table_t *table)
-{
- str_bucket_t *bucket;
- size_t i;
-
- for (i = 0; i < table->num_buckets; ++i) {
- while (table->buckets[i] != NULL) {
- bucket = table->buckets[i];
- table->buckets[i] = bucket->next;
-
- free(bucket->str);
- free(bucket);
- }
- }
-
- free(table->buckets);
- free(table->strings);
- memset(table, 0, sizeof(*table));
-}
-
-int str_table_get_index(str_table_t *table, const char *str, size_t *idx)
-{
- str_bucket_t *bucket;
- sqfs_u32 hash;
- size_t index;
- int err;
-
- hash = strhash(str);
- index = hash % table->num_buckets;
- bucket = table->buckets[index];
-
- while (bucket != NULL) {
- if (strcmp(bucket->str, str) == 0) {
- *idx = bucket->index;
- return 0;
- }
-
- bucket = bucket->next;
- }
-
- err = strings_grow(table);
- if (err)
- return err;
-
- bucket = calloc(1, sizeof(*bucket));
- if (bucket == NULL)
- goto fail_oom;
-
- bucket->str = strdup(str);
- if (bucket->str == NULL)
- goto fail_oom;
-
- bucket->index = table->num_strings;
- table->strings[table->num_strings++] = bucket->str;
- *idx = bucket->index;
-
- bucket->next = table->buckets[index];
- table->buckets[index] = bucket;
- return 0;
-fail_oom:
- free(bucket);
- return SQFS_ERROR_ALLOC;
-}
-
-const char *str_table_get_string(str_table_t *table, size_t index)
-{
- if (index >= table->num_strings)
- return NULL;
-
- return table->strings[index];
-}
-
-static str_bucket_t *bucket_by_index(str_table_t *table, size_t index)
-{
- str_bucket_t *bucket = NULL;
- sqfs_u32 hash;
-
- if (index < table->num_strings) {
- hash = strhash(table->strings[index]);
- bucket = table->buckets[hash % table->num_buckets];
-
- while (bucket != NULL && bucket->index != index)
- bucket = bucket->next;
- }
-
- return bucket;
-}
-
-void str_table_add_ref(str_table_t *table, size_t index)
-{
- str_bucket_t *bucket = bucket_by_index(table, index);
-
- if (bucket != NULL && bucket->refcount < ~((size_t)0))
- bucket->refcount += 1;
-}
-
-void str_table_del_ref(str_table_t *table, size_t index)
-{
- str_bucket_t *bucket = bucket_by_index(table, index);
-
- if (bucket != NULL && bucket->refcount > 0)
- bucket->refcount -= 1;
-}
-
-size_t str_table_get_ref_count(str_table_t *table, size_t index)
-{
- str_bucket_t *bucket = bucket_by_index(table, index);
-
- return bucket != NULL ? bucket->refcount : 0;
-}