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86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/*
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Copyright 2010 BartSimpson aka skindle
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include "cbuf.h"
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cbuf *b_new(unsigned int size) {
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cbuf *b = (cbuf*)calloc(sizeof(cbuf), 1);
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if (b) {
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b->buf = (unsigned char *)malloc(size);
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b->size = b->buf ? size : 0;
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}
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return b;
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}
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void b_free(cbuf *b) {
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if (b) {
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free(b->buf);
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free(b);
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}
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}
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void b_add_byte(cbuf *b, unsigned char ch) {
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if (b == NULL) return;
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if (b->idx == b->size) {
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unsigned char *p = realloc(b->buf, b->size * 2);
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if (p) {
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b->buf = p;
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b->size = b->size * 2;
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}
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}
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if (b->idx < b->size) {
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b->buf[b->idx++] = ch;
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}
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}
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void b_add_buf(cbuf *b, unsigned char *buf, unsigned int len) {
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if (b == NULL) return;
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unsigned int new_sz = b->idx + len;
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while (b->size < new_sz) {
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unsigned char *p = realloc(b->buf, b->size * 2);
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if (p) {
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b->buf = p;
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b->size = b->size * 2;
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}
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else break;
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}
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if ((b->idx + len) <= b->size) {
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memcpy(b->buf + b->idx, buf, len);
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b->idx += len;
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}
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}
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void b_add_str(cbuf *b, const char *buf) {
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if (b == NULL) return;
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unsigned int len = strlen(buf);
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unsigned int new_sz = b->idx + len;
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while (b->size < new_sz) {
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unsigned char *p = realloc(b->buf, b->size * 2);
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if (p) {
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b->buf = p;
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b->size = b->size * 2;
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}
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else break;
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}
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if ((b->idx + len) <= b->size) {
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memcpy(b->buf + b->idx, buf, len);
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b->idx += len;
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}
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}
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