156 lines
3.6 KiB
C
156 lines
3.6 KiB
C
/* main.c */
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/*
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This program demonstrates a simple application of JSON_parser. It reads
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a JSON text from STDIN, producing an error message if the text is rejected.
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% JSON_parser <test/pass1.json
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <assert.h>
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#include <locale.h>
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#include "JSON_parser.h"
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static int print(void* ctx, int type, const JSON_value* value);
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int main(int argc, char* argv[]) {
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int count = 0, result = 0;
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FILE* input;
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JSON_config config;
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struct JSON_parser_struct* jc = NULL;
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init_JSON_config(&config);
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config.depth = 19;
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config.callback = &print;
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config.allow_comments = 1;
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config.handle_floats_manually = 0;
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/* Important! Set locale before parser is created.*/
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if (argc >= 2) {
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if (!setlocale(LC_ALL, argv[1])) {
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fprintf(stderr, "Failed to set locale to '%s'\n", argv[1]);
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}
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} else {
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fprintf(stderr, "No locale provided, C locale is used\n");
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}
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jc = new_JSON_parser(&config);
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input = stdin;
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for (; input ; ++count) {
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int next_char = fgetc(input);
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if (next_char <= 0) {
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break;
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}
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if (!JSON_parser_char(jc, next_char)) {
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fprintf(stderr, "JSON_parser_char: syntax error, byte %d\n", count);
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result = 1;
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goto done;
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}
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}
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if (!JSON_parser_done(jc)) {
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fprintf(stderr, "JSON_parser_end: syntax error\n");
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result = 1;
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goto done;
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}
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done:
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delete_JSON_parser(jc);
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return result;
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}
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static size_t s_Level = 0;
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static const char* s_pIndention = " ";
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static int s_IsKey = 0;
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static void print_indention()
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{
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size_t i;
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for (i = 0; i < s_Level; ++i) {
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printf("%s", s_pIndention);
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}
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}
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static int print(void* ctx, int type, const JSON_value* value)
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{
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switch(type) {
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case JSON_T_ARRAY_BEGIN:
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if (!s_IsKey) print_indention();
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s_IsKey = 0;
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printf("[\n");
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++s_Level;
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break;
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case JSON_T_ARRAY_END:
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assert(!s_IsKey);
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if (s_Level > 0) --s_Level;
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print_indention();
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printf("]\n");
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break;
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case JSON_T_OBJECT_BEGIN:
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if (!s_IsKey) print_indention();
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s_IsKey = 0;
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printf("{\n");
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++s_Level;
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break;
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case JSON_T_OBJECT_END:
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assert(!s_IsKey);
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if (s_Level > 0) --s_Level;
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print_indention();
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printf("}\n");
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break;
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case JSON_T_INTEGER:
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if (!s_IsKey) print_indention();
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s_IsKey = 0;
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printf("integer: "JSON_PARSER_INTEGER_SPRINTF_TOKEN"\n", value->vu.integer_value);
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break;
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case JSON_T_FLOAT:
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if (!s_IsKey) print_indention();
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s_IsKey = 0;
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printf("float: %f\n", value->vu.float_value); /* We wanted stringified floats */
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break;
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case JSON_T_NULL:
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if (!s_IsKey) print_indention();
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s_IsKey = 0;
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printf("null\n");
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break;
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case JSON_T_TRUE:
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if (!s_IsKey) print_indention();
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s_IsKey = 0;
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printf("true\n");
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break;
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case JSON_T_FALSE:
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if (!s_IsKey) print_indention();
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s_IsKey = 0;
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printf("false\n");
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break;
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case JSON_T_KEY:
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s_IsKey = 1;
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print_indention();
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printf("key = '%s', value = ", value->vu.str.value);
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break;
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case JSON_T_STRING:
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if (!s_IsKey) print_indention();
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s_IsKey = 0;
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printf("string: '%s'\n", value->vu.str.value);
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break;
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default:
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assert(0);
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break;
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}
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return 1;
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}
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