130 lines
2.7 KiB
C
Executable File
130 lines
2.7 KiB
C
Executable File
#include "proto.h"
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#include "ringbuf.h"
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I8 ICACHE_FLASH_ATTR PROTO_Init(PROTO_PARSER *parser, PROTO_PARSE_CALLBACK *completeCallback, U8 *buf, U16 bufSize)
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{
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parser->buf = buf;
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parser->bufSize = bufSize;
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parser->dataLen = 0;
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parser->callback = completeCallback;
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parser->isEsc = 0;
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return 0;
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}
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I8 ICACHE_FLASH_ATTR PROTO_ParseByte(PROTO_PARSER *parser, U8 value)
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{
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switch(value){
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case 0x7D:
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parser->isEsc = 1;
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break;
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case 0x7E:
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parser->dataLen = 0;
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parser->isEsc = 0;
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parser->isBegin = 1;
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break;
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case 0x7F:
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if (parser->callback != NULL)
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parser->callback();
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parser->isBegin = 0;
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return 0;
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break;
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default:
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if(parser->isBegin == 0) break;
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if(parser->isEsc){
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value ^= 0x20;
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parser->isEsc = 0;
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}
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if(parser->dataLen < parser->bufSize)
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parser->buf[parser->dataLen++] = value;
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break;
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}
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return -1;
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}
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I8 ICACHE_FLASH_ATTR PROTO_Parse(PROTO_PARSER *parser, U8 *buf, U16 len)
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{
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while(len--)
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PROTO_ParseByte(parser, *buf++);
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return 0;
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}
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I16 ICACHE_FLASH_ATTR PROTO_ParseRb(RINGBUF* rb, U8 *bufOut, U16* len, U16 maxBufLen)
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{
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U8 c;
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PROTO_PARSER proto;
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PROTO_Init(&proto, NULL, bufOut, maxBufLen);
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while(RINGBUF_Get(rb, &c) == 0){
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if(PROTO_ParseByte(&proto, c) == 0){
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*len = proto.dataLen;
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return 0;
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}
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}
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return -1;
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}
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I16 ICACHE_FLASH_ATTR PROTO_Add(U8 *buf, const U8 *packet, I16 bufSize)
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{
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U16 i = 2;
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U16 len = *(U16*) packet;
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if (bufSize < 1) return -1;
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*buf++ = 0x7E;
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bufSize--;
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while (len--) {
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switch (*packet) {
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case 0x7D:
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case 0x7E:
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case 0x7F:
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if (bufSize < 2) return -1;
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*buf++ = 0x7D;
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*buf++ = *packet++ ^ 0x20;
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i += 2;
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bufSize -= 2;
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break;
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default:
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if (bufSize < 1) return -1;
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*buf++ = *packet++;
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i++;
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bufSize--;
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break;
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}
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}
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if (bufSize < 1) return -1;
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*buf++ = 0x7F;
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return i;
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}
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I16 ICACHE_FLASH_ATTR PROTO_AddRb(RINGBUF *rb, const U8 *packet, I16 len)
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{
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U16 i = 2;
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if(RINGBUF_Put(rb, 0x7E) == -1) return -1;
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while (len--) {
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switch (*packet) {
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case 0x7D:
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case 0x7E:
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case 0x7F:
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if(RINGBUF_Put(rb, 0x7D) == -1) return -1;
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if(RINGBUF_Put(rb, *packet++ ^ 0x20) == -1) return -1;
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i += 2;
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break;
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default:
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if(RINGBUF_Put(rb, *packet++) == -1) return -1;
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i++;
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break;
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}
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}
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if(RINGBUF_Put(rb, 0x7F) == -1) return -1;
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return i;
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}
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