test.c

#include <stdio.h>

#include "libyaml/include/yaml.h"

static void parse_yaml(char *filename) {
    FILE *fh = fopen(filename, "r");
    yaml_parser_t parser;

    /* Initialize parser */
    if (!yaml_parser_initialize(&parser))
        fputs("Failed to initialize parser!\n", stderr);
    if (fh == NULL) fputs("Failed to open file!\n", stderr);

    /* Set input file */
    yaml_parser_set_input_file(&parser, fh);

    yaml_token_t token;
    do {
        yaml_parser_scan(&parser, &token);
        switch (token.type) {
            /* Stream start/end */
            case YAML_STREAM_START_TOKEN:
                puts("STREAM START");
                break;
            case YAML_STREAM_END_TOKEN:
                puts("STREAM END");
                break;
            /* Token types (read before actual token) */
            case YAML_KEY_TOKEN:
                printf("(Key token)   ");
                break;
            case YAML_VALUE_TOKEN:
                printf("(Value token) ");
                break;
            /* Block delimeters */
            case YAML_BLOCK_SEQUENCE_START_TOKEN:
                puts("<b>Start Block (Sequence)</b>");
                break;
            case YAML_BLOCK_ENTRY_TOKEN:
                puts("<b>Start Block (Entry)</b>");
                break;
            case YAML_BLOCK_END_TOKEN:
                puts("<b>End block</b>");
                break;
            /* Data */
            case YAML_BLOCK_MAPPING_START_TOKEN:
                puts("[Block mapping]");
                break;
            case YAML_SCALAR_TOKEN:
                printf("scalar %s \n", token.data.scalar.value);
                break;
            /* Others */
            default:
                printf("Got token of type %d\n", token.type);
        }
        if (token.type != YAML_STREAM_END_TOKEN) yaml_token_delete(&token);
    } while (token.type != YAML_STREAM_END_TOKEN);
    yaml_token_delete(&token);

    /* Cleanup */
    yaml_parser_delete(&parser);
    fclose(fh);
}

void print_yaml_version(void) {
    int major, minor, patch;
    yaml_get_version(&major, &minor, &patch);

    printf("yaml lib: %d.%d.%d\n", major, minor, patch);
}

int main(int argc, char **argv) {
    if (argc > 1) {
        parse_yaml(argv[1]);
    }
    return 0;
}