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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 (!verbose && m->pat->type != BP_TAGGED) {
if (m->children) {
for (int i = 0; m->children && m->children[i]; i++)
comma |= _json_match(text, m->children[i], comma, verbose);
}
return comma;
}
if (comma) printf(",\n");
comma = 0;
printf("{");
if (m->pat->type == BP_TAGGED) {
printf("\"tag\":\"%.*s\"", (int)Match(m->pat, BP_TAGGED)->namelen, Match(m->pat, BP_TAGGED)->name);
comma = 1;
}
if (verbose) {
if (comma) printf(",");
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("\",");
printf("\"range\":[%zd,%zd]", m->start - text, m->end - text);
comma = 1;
} else {
if (comma) printf(",");
printf("\"text\":\"");
for (const char *c = m->start; c < m->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("\"");
comma = 1;
}
if (m->children) {
if (comma) printf(",");
printf("\"children\":[");
comma = 0;
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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