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优化代码结构

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源文雨
2022-04-04 18:05:56 +08:00
parent 9e8d9efefe
commit f94738a2f1
1 changed files with 2 additions and 2 deletions
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4
protobuf.c
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@@ -36,7 +36,7 @@ static int write_num(FILE* fp, uint32_t n) {
SIMPLE_PB* get_pb(FILE* fp) {
uint32_t init_pos = ftell(fp);
uint32_t struct_len = read_num(fp);
if(struct_len <= 1) return NULL;
if(struct_len <= 1 || struct_len >= 1u<<20) return NULL; // 1B<struct_len<1MB
SIMPLE_PB* spb = malloc(struct_len + 2 * sizeof(uint32_t));
if(!spb) return NULL;
spb->struct_len = struct_len;
@@ -45,7 +45,7 @@ SIMPLE_PB* get_pb(FILE* fp) {
for(char* p = spb->target; p < spb->target+struct_len; p += offset) {
offset = read_num(fp);
data_len = read_num(fp);
if(data_len > 0) fread(p, data_len, 1, fp);
if(data_len > 0 && data_len <= offset) fread(p, data_len, 1, fp);
}
spb->real_len = ftell(fp) - init_pos;
return spb;