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/*
* SPDX-License-Identifier: ISC
*
* Copyright (C) 2018 Michael Drake <tlsa@netsurf-browser.org>
*/
#include <stdlib.h>
#include <stdio.h>
#include <cyaml/cyaml.h>
/******************************************************************************
* C data structure for storing a project plan.
*
* This is what we want to load the YAML into.
******************************************************************************/
/* Structure for storing numerical sequence */
struct numbers {
char *name;
int *data;
unsigned data_count;
};
/******************************************************************************
* CYAML schema to tell libcyaml about both expected YAML and data structure.
*
* (Our CYAML schema is just a bunch of static const data.)
******************************************************************************/
/* CYAML value schema for entries of the data sequence. */
static const cyaml_schema_value_t data_entry = {
CYAML_VALUE_INT(CYAML_FLAG_DEFAULT, int),
};
/* CYAML mapping schema fields array for the top level mapping. */
static const cyaml_schema_field_t top_mapping_schema[] = {
CYAML_FIELD_STRING_PTR("name", CYAML_FLAG_POINTER,
struct numbers, name,
0, CYAML_UNLIMITED),
CYAML_FIELD_SEQUENCE("data", CYAML_FLAG_POINTER,
struct numbers, data, &data_entry,
0, CYAML_UNLIMITED),
CYAML_FIELD_END
};
/* CYAML value schema for the top level mapping. */
static const cyaml_schema_value_t top_schema = {
CYAML_VALUE_MAPPING(CYAML_FLAG_POINTER,
struct numbers, top_mapping_schema),
};
/******************************************************************************
* Actual code to load and save YAML doc using libcyaml.
******************************************************************************/
/* Our CYAML config.
*
* If you want to change it between calls, don't make it const.
*
* Here we have a very basic config.
*/
static const cyaml_config_t config = {
.log_fn = cyaml_log, /* Use the default logging function. */
.mem_fn = cyaml_mem, /* Use the default memory allocator. */
.log_level = CYAML_LOG_WARNING, /* Logging errors and warnings only. */
};
/* Main entry point from OS. */
int main(int argc, char *argv[])
{
cyaml_err_t err;
struct numbers *n;
enum {
ARG_PROG_NAME,
ARG_PATH_IN,
ARG__COUNT,
};
/* Handle args */
if (argc != ARG__COUNT) {
fprintf(stderr, "Usage:\n");
fprintf(stderr, " %s <INPUT>\n", argv[ARG_PROG_NAME]);
return EXIT_FAILURE;
}
/* Load input file. */
err = cyaml_load_file(argv[ARG_PATH_IN], &config,
&top_schema, (cyaml_data_t **)&n, NULL);
if (err != CYAML_OK) {
fprintf(stderr, "ERROR: %s\n", cyaml_strerror(err));
return EXIT_FAILURE;
}
/* Use the data. */
printf("%s:\n", n->name);
for (unsigned i = 0; i < n->data_count; i++) {
printf(" - %i\n", n->data[i]);
}
/* Free the data */
cyaml_free(&config, &top_schema, n, 0);
return EXIT_SUCCESS;
}
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