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use the local stack region_buffer instead of heap allocation

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lion 2025-09-23 18:15:46 +08:00
parent 7576daa6cc
commit 931fb9e67b
3 changed files with 10 additions and 24 deletions
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3
binding/c/xdb_api.h
View File

@ -41,7 +41,8 @@
#define xdb_vector_index_rows 256
#define xdb_vector_index_cols 256
#define xdb_vector_index_size 8
#define xdb_segment_index_size 14
#define xdb_v4_index_size 14 // 4 + 4 + 2 + 4
#define xdb_v6_index_size 38 // 16 + 16 + 2 + 4
// --- ip version info
#define xdb_ipv4_id 4

27
binding/c/xdb_searcher.c
View File

@ -132,7 +132,7 @@ XDB_PUBLIC(int) xdb_search(xdb_searcher_t *xdb, const bytes_ip_t *ip_bytes, int
register int seg_index_size, l, h, m, p;
unsigned int s_ptr, e_ptr, data_ptr, data_len;
char vector_buffer[xdb_vector_index_size];
char *segment_buffer = NULL;
char segment_buffer[xdb_v6_index_size];
// ip version check
if (ip_len != xdb->version->bytes) {
@ -168,12 +168,8 @@ XDB_PUBLIC(int) xdb_search(xdb_searcher_t *xdb, const bytes_ip_t *ip_bytes, int
// printf("s_ptr=%u, e_ptr=%u\n", s_ptr, e_ptr);
// binary search to get the final region info
// segment_buffer = xdb_malloc(seg_index_size);
seg_index_size = xdb->version->segment_index_size;
segment_buffer = xdb_malloc(seg_index_size);
if (segment_buffer == NULL) {
return -2;
}
data_len = 0, data_ptr = 0;
l = 0, h = ((int) (e_ptr - s_ptr)) / seg_index_size;
while (l <= h) {
@ -183,8 +179,7 @@ XDB_PUBLIC(int) xdb_search(xdb_searcher_t *xdb, const bytes_ip_t *ip_bytes, int
// read the segment index item
err = read(xdb, p, segment_buffer, seg_index_size);
if (err != 0) {
err += 20;
goto defer;
return 20 + err;
}
// decode the data fields as needed
@ -201,28 +196,18 @@ XDB_PUBLIC(int) xdb_search(xdb_searcher_t *xdb, const bytes_ip_t *ip_bytes, int
// printf("data_len=%u, data_ptr=%u\n", data_len, data_ptr);
if (data_len == 0) {
err = 100;
goto defer;
return 100;
}
// buffer alloc checking
err = xdb_region_buffer_alloc(region, data_len);
if (err != 0) {
err += 100;
goto defer;
return 100 + err;
}
err = read(xdb, data_ptr, region->value, data_len);
if (err != 0) {
err += 30;
goto defer;
}
defer:
// checn and free the segment buffer
if (segment_buffer != NULL) {
xdb_free(segment_buffer);
segment_buffer = NULL;
return 30 + err;
}
return err;

4
binding/c/xdb_util.c
View File

@ -305,10 +305,10 @@ XDB_PRIVATE(int) _ipv4_sub_compare(const bytes_ip_t *ip_bytes, int bytes, const
static xdb_version_t _ip_version_list[] = {
// 14 = 4 + 4 + 2 + 4
{xdb_ipv4_id, "IPv4", xdb_ipv4_bytes, 14, _ipv4_sub_compare},
{xdb_ipv4_id, "IPv4", xdb_ipv4_bytes, xdb_v4_index_size, _ipv4_sub_compare},
// 38 = 16 + 16 + 2 + 4
{xdb_ipv6_id, "IPv6", xdb_ipv6_bytes, 38, xdb_ip_sub_compare},
{xdb_ipv6_id, "IPv6", xdb_ipv6_bytes, xdb_v6_index_size, xdb_ip_sub_compare},
// END
{0, NULL, 0, 0, NULL}