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#include <stdbool.h>
#include <stdlib.h>
#include <stdint.h>
#include <limits.h>
#include <string.h>
#include "any_log.h"
#include "config.h"
#define ANY_INI_IMPLEMENT
#include "any_ini.h"
typedef enum {
CONFIG_STRING,
CONFIG_INT_ANY,
CONFIG_INT_POSITIVE,
CONFIG_DOUBLE,
} config_type_t;
typedef struct {
const char *key;
config_type_t type;
size_t offset;
} config_entry_t;
static const config_entry_t config_entries[] = {
{ "width", CONFIG_INT_POSITIVE, offsetof(config_t, width) },
{ "height", CONFIG_INT_POSITIVE, offsetof(config_t, height) },
{ "font", CONFIG_STRING, offsetof(config_t, font) },
{ "monitor", CONFIG_STRING, offsetof(config_t, monitor) },
};
static bool config_read_string(const char *value, char **result)
{
if (value == NULL)
value = "";
size_t start = 0, end = strlen(value);
if (value[0] == '"' && value[end - 1] == '"') {
start++;
end--;
}
*result = malloc(end - start + 1);
memcpy(*result, value + start, end - start);
*result[end - start] = '\0';
return true;
}
static bool config_read_int(const char *value, int *result)
{
char *end;
long n = strtol(value, &end, 0);
*result = n;
if (n > INT_MAX || n < INT_MIN)
log_debug("Integer is too big");
return *end == '\0' && n != LONG_MIN && n != LONG_MAX;
}
static bool config_read_double(const char *value, double *result)
{
char *end;
*result = strtod(value, &end);
return *end == '\0';
}
static bool config_entry(config_t *config, int line, const char *section, const char *key, const char *value)
{
const int n_entries = sizeof(config_entries) / sizeof(config_entry_t);
const char *types[] = {
"string",
"integer",
"positive integer",
"double float",
};
for (int i = 0; i < n_entries; i++) {
if (!strcmp(key, config_entries[i].key)) {
bool nullable = config_entries[i].type == CONFIG_STRING;
if ((value == NULL || *value == '\0') && !nullable) {
log_value_error("Empty config entry",
"s:section", section,
"s:key", key,
"s:expected_type", types[config_entries[i].type],
"i:line", line);
return false;
}
void *result = (uint8_t *)config + config_entries[i].offset;
switch (config_entries[i].type) {
case CONFIG_STRING:
if (config_read_string(value, (char **)result))
return true;
break;
case CONFIG_INT_ANY:
if (config_read_int(value, (int *)result))
return true;
break;
case CONFIG_INT_POSITIVE:
if (config_read_int(value, (int *)result) && *(int *)result >= 0)
return true;
break;
case CONFIG_DOUBLE:
if (config_read_double(value, (double *)result))
return true;
break;
default:
log_panic("Unreachable");
}
log_value_error("Invalid config entry",
"s:section", section,
"s:key", key,
"s:value", value,
"s:expected_type", types[config_entries[i].type],
"i:line", line);
return false;
}
}
log_value_warn("Unknown config entry",
"s:section", section,
"s:key", key,
"s:value", value,
"i:line", line);
return true;
}
static const config_t config_default = {
.font = "monospace 10",
.monitor = NULL,
.height = 50,
.width = 100,
};
void config_init(config_t *config, FILE *file)
{
memcpy(config, &config_default, sizeof(config_t));
log_debug("Copied default config");
any_ini_stream_t ini;
any_ini_file_init(&ini, file);
int errors = 0;
char *section = NULL;
do {
bool unknown_section = section != NULL && strcmp(section, "bar");
if (unknown_section)
log_warn("Unknown section '%s'", section);
char *key;
while ((key = any_ini_stream_next_key(&ini)) != NULL) {
char *value = any_ini_stream_next_value(&ini);
log_value_trace("Reading config entry",
"s:section", section,
"s:key", key,
"s:value", value,
"i:line", ini.line);
if (!unknown_section)
errors += !config_entry(config, ini.line, section, key, value);
free(key);
free(value);
}
free(section);
} while ((section = any_ini_stream_next_section(&ini)) != NULL);
if (errors > 0)
log_panic("Config file contained %d errors", errors);
}
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