/**
* Decodes a string.
* @param str The string to decode
* @return The decoded string.
*/
const char* Encoder::decode(const QString& str)
{
const char* szStr;
int nLen, i, j;
szStr = str.toLatin1();
nLen = str.length();
// Ensure the buffer is big enough to contain the result
nLen /= 2;
resize(nLen + 1);
// Decode the string
for (i = 0, j = 0; i < nLen; i++, j += 2) {
m_pBuf[i] = HEX_TO_CHAR(szStr[j]) << 4;
m_pBuf[i] |= HEX_TO_CHAR(szStr[j + 1]);
}
m_pBuf[i] = 0;
return m_pBuf;
}
static char *get_config_file (const char *filename)
{
const char *try[] = {"XDG_CONFIG_HOME",
"APPDATA",
"HOME",
NULL};
char *conf_file, *conf_dir;
int i = 0;
do {
conf_dir = getenv (try[i++]);
} while (conf_dir == NULL && try[i] != NULL);
if (conf_dir == NULL) {
conf_file = g_strdup (filename);
} else {
conf_dir = g_build_filename (conf_dir, "s4", NULL);
if (g_mkdir_with_parents (conf_dir, 0700) == -1) {
conf_file = g_strdup (filename);
fprintf (stderr, "Could not create %s - %s\n", conf_dir, strerror (errno));
} else {
conf_file = g_build_filename (conf_dir, filename, NULL);
}
g_free (conf_dir);
}
return conf_file;
}
#define HEX_TO_CHAR(h) ((h)<10?(h) + '0':(h) + 'a' - 9)
#define CHAR_TO_HEX(c) (((c) & 0xf) + (((c) & 0x40) >> 6) * 9)
static void encode_string (const char *val, char *buf)
{
for (; *val; val++) {
if (isalnum (*val)) {
*buf++ = *val;
} else {
*buf++ = '%';
*buf++ = HEX_TO_CHAR ((*val >> 4) & 0xf);
*buf++ = HEX_TO_CHAR (*val & 0xf);
}
}
*buf = '\0';
}
static void decode_string (char *buf)
{
char *w, *r;
for (w = r = buf; *r; w++, r++) {
if (*r == '%') {
*w = CHAR_TO_HEX (*(r+1)) << 4 | CHAR_TO_HEX (*(r+2));
r += 2;
} else {
*w = *r;
}
}
*w = '\0';
}
void config_init (void)
{
FILE *file;
char key[1024], value[4096];
int i;
for (i = 0; user_vars[i].key != NULL; i++) {
user_vars[i].value = strdup (user_vars[i].default_value);
}
config_file = get_config_file (CONFIG_FILENAME);
file = fopen (config_file, "r");
if (file == NULL) {
fprintf (stderr, "Could not open %s - %s\n", config_file, strerror (errno));
return;
}
while (fscanf (file, " %s = %s ", key, value) != EOF) {
decode_string (value);
set_var (key, strdup (value));
}
fclose (file);
}
void config_cleanup (void)
{
FILE *file;
char value[4096];
int i;
file = fopen (config_file, "w");
if (file == NULL) {
fprintf (stderr, "Could not open %s - %s\n", config_file, strerror (errno));
return;
}
for (i = 0; user_vars[i].key != NULL; i++) {
encode_string (user_vars[i].value, value);
fprintf (file, "%s = %s\n", user_vars[i].key, value);
}
fclose (file);
g_free (config_file);
}
/* Sets the configuration variable key to val.
*/
void set_var (const char *key, char *val)
{
int i, j;
for (i = 0; user_vars[i].key != NULL; i++) {
if (strcmp (key, user_vars[i].key) == 0) {
if (user_vars[i].possible_values[0] != NULL) {
for (j = 0; user_vars[i].possible_values[j] != NULL; j++) {
if (strcmp (user_vars[i].possible_values[j], val) == 0) {
break;
}
}
if (user_vars[i].possible_values[j] == NULL) {
fprintf (stderr, "%s is not a valid value for %s\n", val, key);
free (val);
return;
}
}
free (user_vars[i].value);
user_vars[i].value = val;
return;
}
}
fprintf (stderr, "%s is not a configuration variable\n", key);
free (val);
}