70 lines
1.6 KiB
C
70 lines
1.6 KiB
C
#include "parser.h"
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#include <assert.h>
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#include <errno.h>
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#include <stdbool.h>
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#include <stdio.h>
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#include "path.h"
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static struct Error *find_spec_json(
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const struct Config *const config, FILE **handle
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) {
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const char *segments[] = {config->root_dir, config->target, "spec.json"};
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char *filepath =
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join_path_segments(sizeof(segments) / sizeof(char *), segments);
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struct Error *error = 0;
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// It is ok if the file does not exist. It is not ok if we couldn't open the
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// file for any other reason.
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*handle = fopen(filepath, "r");
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if (!*handle && errno != ENOENT) {
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error = ERROR_NEW(
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ERROR_PARSER_SPEC_JSON_INVALID, config->target, "/spec.json is invalid."
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);
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}
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free(filepath);
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return error;
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}
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struct Error *parse_spec_json(
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const struct Config *const config, cJSON **parsed
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) {
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FILE *handle = 0;
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struct Error *error = find_spec_json(config, &handle);
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if (error) {
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return error;
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}
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// The `spec.json` file does not exist.
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if (!handle) {
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*parsed = 0;
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return 0;
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}
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// For simplicity, load the entire file into memory.
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fseek(handle, 0, SEEK_END);
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size_t file_size = ftell(handle);
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fseek(handle, 0, SEEK_SET);
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char *fcontent = malloc(file_size);
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size_t read_count = fread(fcontent, 1, file_size, handle);
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assert(read_count == file_size);
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*parsed = cJSON_Parse(fcontent);
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free(fcontent);
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fclose(handle);
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// Can use `cJSON_GetErrorPtr()` to get the actual error message.
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if (!*parsed) {
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return ERROR_NEW(
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ERROR_PARSER_SPEC_JSON_INVALID_SYNTAX,
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"The spec.json file contains invalid JSON."
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);
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}
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return 0;
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}
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