78 lines
2.2 KiB
C
78 lines
2.2 KiB
C
//
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// json.c - Code for printing JSON output of matches.
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//
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#include <stdio.h>
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#include "json.h"
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__attribute__((nonnull))
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static int _json_match(const char *text, match_t *m, int comma, bool verbose);
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//
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// Helper function for json_match().
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// `comma` is used to track whether a comma will need to be printed before the
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// next object or not.
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//
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static int _json_match(const char *text, match_t *m, int comma, bool verbose)
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{
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if (!verbose && m->pat->type != BP_TAGGED) {
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if (m->children) {
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for (int i = 0; m->children && m->children[i]; i++)
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comma |= _json_match(text, m->children[i], comma, verbose);
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}
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return comma;
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}
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if (comma) printf(",\n");
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comma = 0;
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printf("{");
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if (m->pat->type == BP_TAGGED)
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printf("\"tag\":\"%.*s\"", (int)m->pat->args.capture.namelen, m->pat->args.capture.name);
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if (verbose) {
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printf(",\"rule\":\"");
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for (const char *c = m->pat->start; c < m->pat->end; c++) {
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switch (*c) {
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case '"': printf("\\\""); break;
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case '\\': printf("\\\\"); break;
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case '\t': printf("\\t"); break;
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case '\n': printf("↵"); break;
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default: printf("%c", *c); break;
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}
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}
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printf("\",");
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printf("\"range\":[%ld,%ld]", m->start - text, m->end - text);
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} else {
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printf(",\"text\":\"");
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for (const char *c = m->start; c < m->end; c++) {
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switch (*c) {
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case '"': printf("\\\""); break;
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case '\\': printf("\\\\"); break;
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case '\t': printf("\\t"); break;
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case '\n': printf("↵"); break;
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default: printf("%c", *c); break;
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}
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}
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printf("\"");
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}
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if (m->children) {
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printf(",\"children\":[");
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for (int i = 0; m->children && m->children[i]; i++)
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comma |= _json_match(text, m->children[i], comma, verbose);
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printf("]");
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}
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printf("}");
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return 1;
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}
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//
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// Print a match object as a JSON object.
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//
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void json_match(const char *text, match_t *m, bool verbose)
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{
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(void)_json_match(text, m, 0, verbose);
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}
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// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
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