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//
// json.c - Code for printing JSON output of matches.
//
#include <stdio.h>
#include "types.h"
//
// Helper function for json_match().
// `comma` is used to track whether a comma will need to be printed before the
// next object or not.
//
static int _json_match(const char *text, match_t *m, int comma, int verbose)
{
if (!verbose) {
if (m->op->type != VM_REF) {
for (match_t *child = m->child; child; child = child->nextsibling) {
comma |= _json_match(text, child, comma, verbose);
}
return comma;
}
}
if (comma) printf(",\n");
comma = 0;
printf("{\"rule\":\"");
for (const char *c = m->op->start; c < m->op->end; c++) {
switch (*c) {
case '"': printf("\\\""); break;
case '\\': printf("\\\\"); break;
case '\t': printf("\\t"); break;
case '\n': printf("↵"); break;
default: printf("%c", *c); break;
}
}
printf("\",\"start\":%ld,\"end\":%ld,\"children\":[",
m->start - text, m->end - text);
for (match_t *child = m->child; child; child = child->nextsibling) {
comma |= _json_match(text, child, comma, verbose);
}
printf("]}");
return 1;
}
//
// Print a match object as a JSON object.
//
void json_match(const char *text, match_t *m, int verbose)
{
_json_match(text, m, 0, verbose);
}
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1
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