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#include "../../include/std/buffer.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
void tsl_buffer_init(TslBuffer *self) {
self->data = NULL;
self->size = 0;
self->capacity = 0;
}
void tsl_buffer_deinit(TslBuffer *self) {
free(self->data);
self->data = NULL;
self->size = 0;
self->capacity = 0;
}
static int tsl_buffer_ensure_capacity(TslBuffer *self, size_t new_size) {
void *new_ptr;
size_t new_capacity = self->capacity;
if(new_size <= self->capacity)
return 1;
if(new_capacity == 0)
new_capacity = 8;
while(new_capacity < new_size) {
new_capacity += (new_capacity >> 1);
}
new_ptr = realloc(self->data, new_capacity);
if(!new_ptr) {
fprintf(stderr, "Error: buffer append failed. Reason: out of memory\n");
return 0;
}
self->data = new_ptr;
self->capacity = new_capacity;
return 1;
}
int tsl_buffer_append(TslBuffer *self, const void *data, size_t size) {
if(!tsl_buffer_ensure_capacity(self, self->size + size))
return 0;
memcpy((char*)self->data + self->size, data, size);
self->size += size;
return 1;
}
void* tsl_buffer_pop(TslBuffer *self, size_t size) {
assert(self->size >= size);
self->size -= size;
return (char*)self->data + self->size;
}
void* tsl_buffer_begin(TslBuffer *self) {
return self->data;
}
void* tsl_buffer_end(TslBuffer *self) {
return (char*)self->data + self->size;
}
void tsl_buffer_move(TslBuffer *dst, TslBuffer *src) {
dst->data = src->data;
dst->size = src->size;
dst->capacity = src->capacity;
src->data = NULL;
src->size = 0;
src->capacity = 0;
}
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