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/*
* Licensed under a two-clause BSD-style license.
* See LICENSE for details.
*/
#include "git-compat-util.h"
#include "trp.h"
#include "obj_pool.h"
#include "string_pool.h"
static struct trp_root tree = { ~0 };
struct node {
uint32_t offset;
struct trp_node children;
};
/* Two memory pools: one for struct node, and another for strings */
obj_pool_gen(node, struct node, 4096)
obj_pool_gen(string, char, 4096)
static char *node_value(struct node *node)
{
return node ? string_pointer(node->offset) : NULL;
}
static int node_cmp(struct node *a, struct node *b)
{
return strcmp(node_value(a), node_value(b));
}
/* Build a Treap from the node structure (a trp_node w/ offset) */
trp_gen(static, tree_, struct node, children, node, node_cmp)
const char *pool_fetch(uint32_t entry)
{
return node_value(node_pointer(entry));
}
uint32_t pool_intern(const char *key)
{
/* Canonicalize key */
struct node *match = NULL, *node;
uint32_t key_len;
if (key == NULL)
return ~0;
key_len = strlen(key) + 1;
node = node_pointer(node_alloc(1));
node->offset = string_alloc(key_len);
strcpy(node_value(node), key);
match = tree_search(&tree, node);
if (!match) {
tree_insert(&tree, node);
} else {
node_free(1);
string_free(key_len);
node = match;
}
return node_offset(node);
}
uint32_t pool_tok_r(char *str, const char *delim, char **saveptr)
{
char *token = strtok_r(str, delim, saveptr);
return token ? pool_intern(token) : ~0;
}
void pool_print_seq(uint32_t len, uint32_t *seq, char delim, FILE *stream)
{
uint32_t i;
for (i = 0; i < len && ~seq[i]; i++) {
fputs(pool_fetch(seq[i]), stream);
if (i < len - 1 && ~seq[i + 1])
fputc(delim, stream);
}
}
uint32_t pool_tok_seq(uint32_t sz, uint32_t *seq, const char *delim, char *str)
{
char *context = NULL;
uint32_t token = ~0;
uint32_t length;
if (sz == 0)
return ~0;
if (str)
token = pool_tok_r(str, delim, &context);
for (length = 0; length < sz; length++) {
seq[length] = token;
if (token == ~0)
return length;
token = pool_tok_r(NULL, delim, &context);
}
seq[sz - 1] = ~0;
return sz;
}
void pool_reset(void)
{
node_reset();
string_reset();
}
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