toml/toml_json.c

#ifdef NDEBUG
#undef NDEBUG
#endif

#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <errno.h>
#include <stdint.h>
#include <assert.h>
#include <inttypes.h>
#include "toml.h"


static void print_escape_string(const char* s)
{
    for ( ; *s; s++) {
	int ch = *s;
	switch (ch) {
	case '\b': printf("\\b"); break;
	case '\t': printf("\\t"); break;
	case '\n': printf("\\n"); break;
	case '\f': printf("\\f"); break;
	case '\r': printf("\\r"); break;
	case '"': printf("\\\""); break;
	case '\\': printf("\\\\"); break;
	default: printf("%c", ch); break;
	}
    }
}

static void print_raw(const char* s)
{
    char* sval;
    int64_t ival;
    int bval;
    double dval;
    toml_timestamp_t ts;

    if (0 == toml_rtos(s, &sval)) {
	printf("{\"type\":\"string\",\"value\":\"");
	print_escape_string(sval);
	printf("\"}");
	free(sval);
    } else if (0 == toml_rtoi(s, &ival)) {
	printf("{\"type\":\"integer\",\"value\":\"%" PRId64 "\"}", ival);
    } else if (0 == toml_rtob(s, &bval)) {
	printf("{\"type\":\"bool\",\"value\":\"%s\"}", bval ? "true" : "false");
    } else if (0 == toml_rtod(s, &dval)) {
	printf("{\"type\":\"float\",\"value\":\"%s\"}", s);
    } else if (0 == toml_rtots(s, &ts)) {
	if (ts.year && ts.hour) {
	    printf("{\"type\":\"datetime\",\"value\":\"%04d-%02d-%02dT%02d:%02d:%02d%s\"}",
		   *ts.year, *ts.month, *ts.day, *ts.hour, *ts.minute, *ts.second,
		   (ts.z ? ts.z : ""));
	} else if (ts.year) {
	    printf("{\"type\":\"date\",\"value\":\"%04d-%02d-%02d\"}",
		   *ts.year, *ts.month, *ts.day);
	} else if (ts.hour) {
	    printf("{\"type\":\"time\",\"value\":\"%02d:%02d:%02d\"}",
		   *ts.hour, *ts.minute, *ts.second);
	}
    } else {
	fprintf(stderr, "unknown type\n");
	exit(1);
    }
}


static void print_array(toml_array_t* arr);
static void print_table(toml_table_t* curtab)
{
    int i;
    const char* key;
    const char* raw;
    toml_array_t* arr;
    toml_table_t* tab;


    printf("{");
    for (i = 0; 0 != (key = toml_key_in(curtab, i)); i++) {

	printf("%s\"%s\":", i > 0 ? "," : "", key);
	
	if (0 != (raw = toml_raw_in(curtab, key))) {
	    print_raw(raw);
	} else if (0 != (arr = toml_array_in(curtab, key))) {
	    print_array(arr);
	} else if (0 != (tab = toml_table_in(curtab, key))) {
	    print_table(tab);
	} else {
	    abort();
	}
    }
    printf("}");
}

static void print_table_array(toml_array_t* curarr)
{
    int i;
    toml_table_t* tab;
    
    printf("[");
    for (i = 0; 0 != (tab = toml_table_at(curarr, i)); i++) {
	printf("%s", i > 0 ? "," : "");
	print_table(tab);
    }
    printf("]");
}

static void print_array(toml_array_t* curarr)
{
    toml_array_t* arr;
    const char* raw;
    int i;

    if (toml_array_kind(curarr) == 't') {
	print_table_array(curarr);
	return;
    } 

    printf("{\"type\":\"array\",\"value\":[");
    switch (toml_array_kind(curarr)) {

    case 'v': 
	for (i = 0; 0 != (raw = toml_raw_at(curarr, i)); i++) {
	    printf("%s", i > 0 ? "," : "");
	    print_raw(raw);
	}
	break;

    case 'a': 
	for (i = 0; 0 != (arr = toml_array_at(curarr, i)); i++) {
	    printf("%s", i > 0 ? "," : "");
	    print_array(arr);
	}
	break;

    default:
	break;
    }
    printf("]}");
}



static void cat(FILE* fp)
{
    char  errbuf[200];
    
    toml_table_t* tab = toml_parse_file(fp, errbuf, sizeof(errbuf));
    if (!tab) {
	fprintf(stderr, "ERROR: %s\n", errbuf);
	exit(1);
    }

    print_table(tab);
    printf("\n");

    toml_free(tab);
}


int main(int argc, const char* argv[])
{
    int i;
    if (argc == 1) {
	cat(stdin);
    } else {
	for (i = 1; i < argc; i++) {
	    
	    FILE* fp = fopen(argv[i], "r");
	    if (!fp) {
		fprintf(stderr, "ERROR: cannot open %s: %s\n",
			argv[i], strerror(errno));
		exit(1);
	    }
	    cat(fp);
	    fclose(fp);
	}
    }
    return 0;
}