80 lines
1.2 KiB
C
80 lines
1.2 KiB
C
/*
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* buffer.c
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*
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* Created on: Oct 19, 2010
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* Author: dogan
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdint.h>
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#include "buffer.h"
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uint8_t* data_buffer;
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uint16_t buffer_size;
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uint16_t buffer_index;
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void
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delete_buffer(void)
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{
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if (data_buffer) {
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free(data_buffer);
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data_buffer = NULL;
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buffer_index = 0;
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buffer_size = 0;
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}
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}
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uint8_t*
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init_buffer(uint16_t size)
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{
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delete_buffer();
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data_buffer = (uint8_t*)malloc(size);
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if (data_buffer) {
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buffer_size = size;
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}
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buffer_index = 0;
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return data_buffer;
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}
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uint8_t*
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allocate_buffer(uint16_t size)
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{
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uint8_t* buffer = NULL;
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int rem = 0;
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/*To get rid of alignment problems, always allocate even size*/
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rem = size % 4;
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if (rem) {
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size+=(4-rem);
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}
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if (buffer_index + size < buffer_size) {
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buffer = data_buffer + buffer_index;
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buffer_index += size;
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}
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return buffer;
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}
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uint8_t*
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copy_to_buffer(void* data, uint16_t len)
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{
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uint8_t* buffer = allocate_buffer(len);
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if (buffer) {
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memcpy(buffer, data, len);
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}
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return buffer;
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}
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uint8_t*
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copy_text_to_buffer(char* text)
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{
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uint8_t* buffer = allocate_buffer(strlen(text) + 1);
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if (buffer) {
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strcpy(buffer, text);
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}
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return buffer;
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}
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