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#include <stdbool.h>
#include <stddef.h> // size_t
#include "sok.h"
#define UNUSED(a) ((void) (a))
#define IS_DIGIT(c) ((c) >= '0' && (c) <= '9')
#define CASE_DIGIT \
case '0': \
case '1': \
case '2': \
case '3': \
case '4': \
case '5': \
case '6': \
case '7': \
case '8': \
case '9':
void
sok_level_parser_init(
sok_level_parser_t * const parser,
const sok_level_parser_cbs_t * const cbs,
void * const user_data
) {
parser->cbs = cbs;
parser->user_data = user_data;
}
bool
sok_level_parser_parse(
sok_level_parser_t * const parser,
const char * const buf,
const size_t buf_len
) {
sok_pos_t size = { .x = 0, .y = 0 };
for (size_t i = 0, ofs = 0, w = 0; i < buf_len; i++) {
if (buf[i] == '|') {
if (w > size.x) {
size.x = w;
}
// reset column position, increment row count
w = 0;
size.y++;
} else if (IS_DIGIT(buf[i])) {
ofs = 10 * ofs + (buf[i] - '0');
} else if (ofs > 0) {
w += ofs;
ofs = 0;
} else {
w++;
}
}
// increment row count
size.y++;
// emit level size
if (
parser->cbs->on_size &&
!parser->cbs->on_size(parser, size)
) {
// return failure
return false;
}
sok_pos_t pos = { 0, 0 };
for (size_t i = 0, ofs = 0; i < buf_len; i++) {
switch (buf[i]) {
case '|':
// new line
pos.x = 0;
pos.y++;
break;
CASE_DIGIT
ofs = 10 * ofs + (buf[i] - '0');
break;
case '-':
case '_':
case ' ':
// advance
pos.x += (ofs > 0) ? ofs : 1;
ofs = 0;
break;
case '+':
// emit goal
if (parser->cbs->on_goal && !parser->cbs->on_goal(parser, pos)) {
// return failure
return false;
}
// emit home
if (parser->cbs->on_home && !parser->cbs->on_home(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
break;
case '@':
// emit home
if (parser->cbs->on_home && !parser->cbs->on_home(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
break;
case '#':
for (size_t j = (ofs > 0) ? ofs : 1; j; j--) {
// emit wall
if (parser->cbs->on_wall && !parser->cbs->on_wall(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
}
ofs = 0;
break;
case '*':
for (size_t j = (ofs > 0) ? ofs : 1; j--;) {
// emit goal
if (parser->cbs->on_goal && !parser->cbs->on_goal(parser, pos)) {
// return failure
return false;
}
// emit box
if (parser->cbs->on_box && !parser->cbs->on_box(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
}
ofs = 0;
break;
case '.':
for (size_t j = (ofs > 0) ? ofs : 1; j--;) {
// emit goal
if (parser->cbs->on_goal && !parser->cbs->on_goal(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
}
ofs = 0;
break;
case '$':
for (size_t j = (ofs > 0) ? ofs : 1; j--;) {
// emit box
if (parser->cbs->on_box && !parser->cbs->on_box(parser, pos)) {
// return failure
return false;
}
// advance
pos.x++;
}
ofs = 0;
break;
default:
// emit junk
if (parser->cbs->on_junk && !parser->cbs->on_junk(parser, i, buf[i])) {
// return failure
return false;
}
// return failure
return false;
}
}
// return success
return true;
}
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