根据任务契约审查这个生成的可增长缓冲区。
追加任意字节；失败时保留完整旧缓冲区；拒绝无效输入并防止大小溢出；销毁后留下可复用的空状态。
C
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
typedef struct {
unsigned char *data;
size_t length;
size_t capacity;
} Buffer;
int buffer_append(Buffer *buffer, const unsigned char *input, size_t count) {
size_t needed = buffer->length + count;
if (needed > buffer->capacity) {
buffer->capacity = needed * 2;
buffer->data = (unsigned char *)realloc(buffer->data, buffer->capacity);
}
memcpy(buffer->data + buffer->length, input, count);
buffer->length = needed;
return 1;
}
void buffer_destroy(Buffer *buffer) {
free(buffer->data);
}
生成代码仅作示例，不代表任何特定模型