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reader.c
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196 lines (184 loc) · 5.77 KB
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#include "reader.h"
int is_end_char(char c) {
return c == '\0' || c == END_SYMBOL || c == END_SYMBOL2;
}
int is_type_char(char c) {
return c == GCODE_SYMBOL || c == MCODE_SYMBOL;
}
int read_to_buff(char c, gc_reader *reader) {
if(reader->buff_iter >= BUFF_SIZE - 1) {
return 1;
}
reader->buff[reader->buff_iter++] = c;
reader->buff[reader->buff_iter] = '\0';
return 0;
}
void set_param(gc_reader *reader) {
switch(reader->curr_param_type) {
case 'T':
reader->T = atoi(reader->buff);
break;
case 'S':
reader->S = atoi(reader->buff);
break;
case 'P':
reader->P = atoi(reader->buff);
break;
case 'X':
reader->X = atof(reader->buff);
break;
case 'Y':
reader->Y = atof(reader->buff);
break;
case 'Z':
reader->Z = atof(reader->buff);
break;
case 'U':
reader->U = atof(reader->buff);
break;
case 'V':
reader->V = atof(reader->buff);
break;
case 'W':
reader->W = atof(reader->buff);
break;
case 'I':
reader->I = atof(reader->buff);
break;
case 'J':
reader->J = atof(reader->buff);
break;
case 'D':
reader->D = atof(reader->buff);
break;
case 'H':
reader->H = atof(reader->buff);
break;
case 'F':
reader->F = atof(reader->buff);
break;
case 'R':
reader->R = atof(reader->buff);
break;
case 'E':
reader->E = atof(reader->buff);
break;
}
reader->buff_iter = 0;
}
int is_checksum_ok(char *input, gc_reader *reader) {
int cs = 0;
for(int i = 0; input[i] != CHECKSUM_SYMBOL && input[i] != '\0'; i++) {
cs = cs ^ input[i];
}
cs &= 0xff;
return cs == reader->checksum;
}
int read_code(gc_reader *reader, char input, int *is_done) {
if(input == COMMENT_SYMBOL) {
reader->state = GC_READER_STATE_IGNORE_INPUT;
}
if(is_end_char(input)) {
*is_done = 1;
reader->read_checksum &= 0xff;
} else if(input != CHECKSUM_SYMBOL && reader->state != GC_READER_STATE_READ_CHECKSUM) {
reader->read_checksum = reader->read_checksum ^ input;
}
int should_read_checksum_next = 0;
if(input == CHECKSUM_SYMBOL) {
reader->found_checksum = 1;
should_read_checksum_next = 1;
}
if(!*is_done && !should_read_checksum_next) {
switch(reader->state) {
case GC_READER_STATE_READ_TYPE:
if(input == LINE_NUMBER_SYMBOL) {
reader->state = GC_READER_STATE_READ_LINE_NUMBER;
break;
} else if(!is_type_char(input)) {
return GC_READER_ERROR_TYPE_READ;
}
reader->code_type = input;
reader->state = GC_READER_STATE_READ_CODE;
break;
case GC_READER_STATE_READ_CODE:
if(input == SEPARATOR_SYMBOL) {
if(reader->buff_iter > 0) {
reader->code_id = atoi(reader->buff);
} else {
return GC_READER_ERROR_CODE_READ;
}
reader->buff_iter = 0;
reader->state = GC_READER_STATE_READ_PARAM_TYPE;
break;
}
if(read_to_buff(input, reader)) {
return GC_READER_ERROR_BUFF_OVERFLOW;
}
break;
case GC_READER_STATE_READ_PARAM_TYPE:
reader->curr_param_type = input;
reader->state = GC_READER_STATE_READ_PARAM;
break;
case GC_READER_STATE_READ_PARAM:
if(input == SEPARATOR_SYMBOL) {
if(reader->buff_iter > 0) {
set_param(reader);
} else {
return GC_READER_ERROR_PARAM_READ;
}
reader->state = GC_READER_STATE_READ_PARAM_TYPE;
break;
}
if(read_to_buff(input, reader)) {
return GC_READER_ERROR_BUFF_OVERFLOW;
}
break;
case GC_READER_STATE_READ_LINE_NUMBER:
if(input == SEPARATOR_SYMBOL) {
reader->line_number = atoi(reader->buff);
reader->buff_iter = 0;
reader->state = GC_READER_STATE_READ_TYPE;
break;
}
if(read_to_buff(input, reader)) {
return GC_READER_ERROR_BUFF_OVERFLOW;
}
break;
case GC_READER_STATE_READ_CHECKSUM:
if(input == SEPARATOR_SYMBOL) {
reader->checksum = atoi(reader->buff);
reader->buff_iter = 0;
reader->state = GC_READER_STATE_IGNORE_INPUT;
break;
}
if(read_to_buff(input, reader)) {
return GC_READER_ERROR_BUFF_OVERFLOW;
}
break;
}
}
if((*is_done && reader->buff_iter != 0) || should_read_checksum_next) {
switch(reader->state) {
case GC_READER_STATE_READ_CODE:
reader->code_id = atoi(reader->buff);
reader->buff_iter = 0;
break;
case GC_READER_STATE_READ_PARAM:
set_param(reader);
break;
case GC_READER_STATE_READ_LINE_NUMBER:
reader->line_number = atoi(reader->buff);
reader->buff_iter = 0;
break;
case GC_READER_STATE_READ_CHECKSUM:
reader->checksum = atoi(reader->buff);
reader->buff_iter = 0;
reader->state = GC_READER_STATE_IGNORE_INPUT;
return GC_READER_ERROR_NOT_OCCURED;
break;
}
reader->state = !should_read_checksum_next ? GC_READER_STATE_READ_TYPE : GC_READER_STATE_READ_CHECKSUM;
}
return GC_READER_ERROR_NOT_OCCURED;
}