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- /* vim: tabstop=4 shiftwidth=4 noexpandtab
- * This file is part of ToaruOS and is released under the terms
- * of the NCSA / University of Illinois License - see LICENSE.md
- * Copyright (C) 2018 K. Lange
- *
- * Configuration File Reader
- *
- * Reads an implementation of the INI "standard". Note that INI
- * isn't actually a standard. We support the following:
- * - ; comments
- * - foo=bar keyword assignment
- * - [sections]
- */
- #include <stdio.h>
- #include <toaru/hashmap.h>
- #include <toaru/confreader.h>
- #define TRACE_APP_NAME "confreader"
- #define TRACE(...)
- //#include <toaru/trace.h>
- static void free_hashmap(void * h) {
- hashmap_free(h);
- free(h);
- }
- confreader_t * confreader_load(const char * file) {
- confreader_t * out = malloc(sizeof(confreader_t));
- out->sections = hashmap_create(10);
- FILE * f = fopen(file, "r");
- hashmap_t * current_section = hashmap_create(10);
- current_section->hash_val_free = free_hashmap;
- hashmap_set(out->sections, "", current_section);
- if (!f) {
- /* File does not exist, no configuration values, but continue normally. */
- return out;
- }
- char tmp[1024];
- char tmp2[1024];
- while (!feof(f)) {
- char c = fgetc(f);
- tmp[0] = '\0';
- tmp2[0] = '\0';
- if (c == ';') {
- TRACE("Comment");
- while (!feof(f) && fgetc(f) != '\n');
- TRACE("Done");
- } else if (c == '\n' || c == EOF) {
- TRACE("blank line or EOF: %d", c);
- continue;
- } else if (c == '[') {
- TRACE("section");
- char * foo = tmp;
- int i;
- while ((i = fgetc(f)) >= 0) {
- if (i == ']') break;
- *foo = i;
- foo++;
- *foo = '\0';
- }
- while (!feof(f) && fgetc(f) != '\n');
- current_section = hashmap_create(10);
- TRACE("adding section %s", tmp);
- hashmap_set(out->sections, tmp, current_section);
- TRACE("section is over");
- } else {
- TRACE("value");
- char * foo = tmp;
- *foo = c;
- foo++;
- int i;
- while ((i = fgetc(f)) >= 0) {
- if (i == '=') break;
- *foo = i;
- foo++;
- *foo = '\0';
- }
- if (i != '=') {
- TRACE("no equals sign");
- while (!feof(f) && fgetc(f) != '\n');
- continue;
- }
- TRACE("=");
- foo = tmp2;
- while ((i = fgetc(f)) >= 0) {
- if (i == '\n') break;
- *foo = i;
- foo++;
- *foo = '\0';
- }
- TRACE("setting value %s to %s", tmp, tmp2);
- hashmap_set(current_section, tmp, strdup(tmp2));
- }
- }
- fclose(f);
- TRACE("done reading");
- return out;
- }
- void confreader_free(confreader_t * conf) {
- free_hashmap(conf->sections);
- free(conf);
- }
- char * confreader_get(confreader_t * ctx, char * section, char * value) {
- if (!ctx) return NULL;
- hashmap_t * s = hashmap_get(ctx->sections, section);
- if (!s) {
- TRACE("section doesn't exist: %s", section);
- return NULL;
- }
- return hashmap_get(s, value);
- }
- char * confreader_getd(confreader_t * ctx, char * section, char * value, char * def) {
- char * result = confreader_get(ctx, section, value);
- return result ? result : def;
- }
- int confreader_int(confreader_t * ctx, char * section, char * value) {
- char * result = confreader_get(ctx, section, value);
- if (!result) return 0;
- return atoi(result);
- }
- int confreader_intd(confreader_t * ctx, char * section, char * value, int def) {
- char * result = confreader_get(ctx, section, value);
- if (!result) return def;
- return atoi(result);
- }
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