mrsh/buffer.c -rw-r--r-- 1.3 KiB View raw
                                                                                
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#include <mrsh/buffer.h>
#include <stdlib.h>
#include <string.h>

char *mrsh_buffer_reserve(struct mrsh_buffer *buf, size_t size) {
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size_t new_len = buf->len + size; if (new_len > buf->cap) { size_t new_cap = 2 * buf->cap; if (new_cap == 0) { new_cap = 32; } if (new_cap < new_len) { new_cap = new_len; } char *new_buf = realloc(buf->data, new_cap); if (new_buf == NULL) { return NULL; } buf->data = new_buf; buf->cap = new_cap; } return &buf->data[buf->len]; } char *mrsh_buffer_add(struct mrsh_buffer *buf, size_t size) {
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char *data = mrsh_buffer_reserve(buf, size); if (data == NULL) { return NULL; } buf->len += size; return data; } bool mrsh_buffer_append(struct mrsh_buffer *buf, const char *data, size_t size) {
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char *dst = mrsh_buffer_add(buf, size); if (dst == NULL) { return false; } memcpy(dst, data, size); return true; } bool mrsh_buffer_append_char(struct mrsh_buffer *buf, char c) {
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char *dst = mrsh_buffer_add(buf, sizeof(char)); if (dst == NULL) { return false; } *dst = c; return true; } char *mrsh_buffer_steal(struct mrsh_buffer *buf) {
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char *data = buf->data; buf->data = NULL; buf->cap = buf->len = 0; return data; } void mrsh_buffer_finish(struct mrsh_buffer *buf) {
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free(buf->data); buf->data = NULL; buf->cap = buf->len = 0; }