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//
// json.c - Code for printing JSON output of matches.
//
#include <stdio.h>
#include "json.h"
__attribute__((nonnull))
static int _json_match(const char *text, match_t *m, int comma, bool verbose);
//
// 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, bool verbose)
{
if (comma) printf(",\n");
comma = 0;
printf("{\"rule\":\"");
for (const char *c = m->pat->start; c < m->pat->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("\",\"range\":[%ld,%ld]", m->start - text, m->end - text);
if (m->children && (verbose || m->pat->type != BP_REF)) {
printf(",\"children\":[");
for (int i = 0; m->children && m->children[i]; i++)
comma |= _json_match(text, m->children[i], comma, verbose);
printf("]");
}
printf("}");
return 1;
}
//
// Print a match object as a JSON object.
//
void json_match(const char *text, match_t *m, bool verbose)
{
(void)_json_match(text, m, 0, verbose);
}
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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