mirror of https://github.com/mrkite/regs.git
67 lines
1.3 KiB
C
67 lines
1.3 KiB
C
/**
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* @copyright 2018 Sean Kasun
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* Routines for parsing a simple config file
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*/
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#include "parser.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <ctype.h>
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void fail(ConfigFile *f, char *format, ...) {
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// calculate line and column
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int line = 1;
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int col = 1;
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bool done = false;
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while (f->p > f->start) {
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if (*f->p == '\n') {
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done = true;
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line++;
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}
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if (!done) {
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col++;
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}
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f->p--;
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}
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va_list args;
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va_start(args, format);
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fprintf(stderr, "%s[%d,%d] Error: ", f->filename, line, col);
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vfprintf(stderr, format, args);
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fprintf(stderr, "\n");
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va_end(args);
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exit(-1);
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}
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void eatSpaces(ConfigFile *f) {
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while (f->p < f->end && isspace(*f->p)) {
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f->p++;
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}
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}
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bool token(ConfigFile *f, char ch) {
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eatSpaces(f);
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if (f->p < f->end && *f->p == ch) { // found it, consume
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f->p++;
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return true;
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}
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// not found, don't consume anything
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return false;
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}
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uint32_t hex(ConfigFile *f) {
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eatSpaces(f);
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uint32_t res = 0;
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while (f->p < f->end && isxdigit(*f->p)) {
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res <<= 4;
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if (*f->p >= '0' && *f->p <= '9') {
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res |= *f->p - '0';
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} else if (*f->p >= 'a' && *f->p <= 'f') {
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res |= *f->p - 'a' + 10;
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} else if (*f->p >= 'A' && *f->p <= 'F') {
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res |= *f->p - 'A' + 10;
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}
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f->p++;
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}
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return res;
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}
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