Read a configuration file: Difference between revisions

=={{header|C}}==

{{libheader|libconfini}}

'''optimized'''

<lang c>#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <confini.h>

#define bool unsigned char

#define FALSE 0

#define TRUE 1

#define CONFIGS_MEMBERS 5

#define INI_ARRAY_DELIMITER ','

/* Assume that the config file represent a struct containing all the parameters to load */

struct configs {

char *fullname;

char *favouritefruit;

bool needspeeling;

bool seedsremoved;

char **otherfamily;

size_t otherfamily_len;

size_t _configs_left_;

};

static inline void free_non_null (void * ptr) {

if (ptr) { free(ptr); }

}

static int array_part_handler (char * part, size_t partlen, size_t idx, IniFormat ini_format, void * v_array) {

ini_string_parse(part, ini_format); /* Remove all quotes, if any */

((char **) v_array)[idx] = part;

return 0;

}

static char ** make_array (size_t * arrlen, const char * src, const size_t srclen, IniFormat ini_format) {

/* Allocate a new array of strings and populate it from the stringified source */

char ** dest;

*arrlen = ini_array_get_length(src, INI_ARRAY_DELIMITER, ini_format);

dest = (char **) malloc(*arrlen * sizeof(char *) + srclen * sizeof(char));

char * const str_ptr = (char *) dest + *arrlen * sizeof(char *);

memcpy(str_ptr, src, srclen);

ini_array_split(str_ptr, INI_ARRAY_DELIMITER, ini_format, array_part_handler, dest);

return dest;

}

static int configs_member_handler (IniDispatch *this, void *v_confs) {

struct configs *confs = (struct configs *) v_confs;

if (this->type != INI_KEY) {

return 0;

}

/* Remove all quotes, if any */

this->d_len = ini_string_parse(this->data, this->format);

if (ini_string_match_ss("FULLNAME", this->data, this->format)) {

this->v_len = ini_string_parse(this->value, this->format); /* Remove all quotes, if any */

confs->fullname = strndup(this->value, this->v_len);

confs->_configs_left_--;

} else if (ini_string_match_ss("FAVOURITEFRUIT", this->data, this->format)) {

this->v_len = ini_string_parse(this->value, this->format); /* Remove all quotes, if any */

confs->favouritefruit = strndup(this->value, this->v_len);

confs->_configs_left_--;

} else if (ini_string_match_ss("NEEDSPEELING", this->data, this->format)) {

confs->needspeeling = ini_get_bool(this->value, TRUE);

confs->_configs_left_--;

} else if (ini_string_match_ss("SEEDSREMOVED", this->data, this->format)) {

confs->seedsremoved = ini_get_bool(this->value, TRUE);

confs->_configs_left_--;

} else if (ini_string_match_ss("OTHERFAMILY", this->data, this->format)) {

this->v_len = ini_array_collapse(this->value, INI_ARRAY_DELIMITER, this->format); /* Save memory (not strictly needed) */

confs->otherfamily = make_array(&confs->otherfamily_len, this->value, this->v_len + 1, this->format);

confs->_configs_left_--;

}

/* Optimization: stop reading the INI file when we have all we need */

return !confs->_configs_left_;

}

static int populate_configs (struct configs * confs) {

/* Define the format of the configuration file */

IniFormat config_format = {

.delimiter_symbol = INI_ANY_SPACE,

.semicolon_marker = INI_IGNORE,

.hash_marker = INI_IGNORE,

.multiline_nodes = INI_NO_MULTILINE,

.case_sensitive = TRUE,

.no_spaces_in_names = TRUE,

.no_single_quotes = FALSE,

.no_double_quotes = FALSE,

.implicit_is_not_empty = TRUE,

.do_not_collapse_values = FALSE,

.preserve_empty_quotes = FALSE,

.no_disabled_after_space = FALSE,

.disabled_can_be_implicit = FALSE

};

*confs = (struct configs) { NULL, NULL, FALSE, FALSE, NULL, 0, CONFIGS_MEMBERS };

if (load_ini_path("rosetta.conf", config_format, NULL, configs_member_handler, confs) & CONFINI_ERROR) {

fprintf(stderr, "Sorry, something went wrong :-(\n");

return 1;

}

return 0;

}

int main () {

struct configs confs;

ini_global_set_implicit_value("YES", 0);

populate_configs(&confs);

/* Print the configurations parsed */

printf(

"Full name: %s\n"

"Favorite fruit: %s\n"

"Need spelling: %s\n"

"Seeds removed: %s\n",

confs.fullname,

confs.favouritefruit,

confs.needspeeling ? "True" : "False",

confs.seedsremoved ? "True" : "False"

);

for (size_t idx = 0; idx < confs.otherfamily_len; idx++) {

printf("Other family[%d]: %s\n", idx, confs.otherfamily[idx]);

}

/* Free the allocated memory */

free_non_null(confs.fullname);

free_non_null(confs.favouritefruit);

free_non_null(confs.otherfamily);

return 0;

}</lang>

{{out}}

<pre>Full name: Foo Barber

Favorite fruit: banana

Need spelling: True

Seeds removed: False

Other family[0]: Rhu Barber

Other family[1]: Harry Barber</pre>