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Improve int64_to_string() by using snprintf for cache key collision prevention

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Natalia Portillo
2025-09-30 01:51:41 +01:00
parent 6df199f8e8
commit c122839733
1 changed files with 7 additions and 22 deletions
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29
src/lru.c
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@@ -1,3 +1,7 @@
#include <inttypes.h>
#include <stddef.h>
#include <stdint.h>
#include <stdlib.h>
#include <string.h>
#include <uthash.h>
@@ -47,28 +51,9 @@ void add_to_cache(struct CacheHeader *cache, char *key, void *value)
FORCE_INLINE char *int64_to_string(uint64_t number)
{
char *charKey;
charKey = malloc(17);
charKey[0] = (char)(number >> 60);
charKey[1] = (char)((number & 0xF00000000000000ULL) >> 56);
charKey[2] = (char)((number & 0xF0000000000000ULL) >> 52);
charKey[3] = (char)((number & 0xF000000000000ULL) >> 48);
charKey[4] = (char)((number & 0xF00000000000ULL) >> 44);
charKey[5] = (char)((number & 0xF0000000000ULL) >> 40);
charKey[6] = (char)((number & 0xF000000000ULL) >> 36);
charKey[7] = (char)((number & 0xF00000000ULL) >> 32);
charKey[8] = (char)((number & 0xF0000000ULL) >> 28);
charKey[9] = (char)((number & 0xF000000ULL) >> 24);
charKey[10] = (char)((number & 0xF00000ULL) >> 20);
charKey[11] = (char)((number & 0xF0000ULL) >> 16);
charKey[12] = (char)((number & 0xF000ULL) >> 12);
charKey[13] = (char)((number & 0xF00ULL) >> 8);
charKey[14] = (char)((number & 0xF0ULL) >> 4);
charKey[15] = (char)(number & 0xFULL);
charKey[16] = 0;
char *charKey = malloc(17); // 16 hex digits + null terminator
if(!charKey) return NULL;
snprintf(charKey, 17, "%016" PRIX64, number);
return charKey;
}