static byte parseHexByte(const char * &str) {
byte b = parseHexChar(str[0]);
if (str[1] == ':' || str[1] == '\0') {
str += 2;
return b;
} else {
b = b << 4 | parseHexChar(str[1]);
str += 3;
return b;
}
}
int AtMegaWebServer::unescapeChars(char* str){
int ret = 0;
while(*str && *str != '%') str++;
if(*str){
char* dest = str;
do{
if(parseHexChar(*(str + 1)) >= 0 && parseHexChar(*(str + 2)) >= 0){
*dest = (parseHexChar(*(str + 1)) << 4) + parseHexChar(*(str + 2));
str += 3;
dest++;
ret += 2;
}
while(*str && *str != '%'){
*dest = *str;
dest++; str++;
}
}while(*str);
*dest = 0;
}
return ret;
}
char* MiniWebServer::decode_url_encoded(const char* s) {
if (!s) {
return NULL;
}
char* r = (char*)malloc_check(strlen(s) + 1);
if (!r) {
return NULL;
}
char* r2 = r;
const char* p = s;
while (*s && (p = strchr(s, '%'))) {
if (p - s) {
memcpy(r2, s, p - s);
r2 += (p - s);
}
// If the remaining number of characters is less than 3, we cannot
// have a complete escape sequence. Break early.
if (strlen(p) < 3) {
// Move the new beginning to the value of p.
s = p;
break;
}
uint8_t r = parseHexChar(*(p + 1)) << 4 | parseHexChar(*(p + 2));
*r2++ = r;
p += 3;
// Move the new beginning to the value of p.
s = p;
}
// Copy whatever is left of the string in the result.
int len = strlen(s);
if (len > 0) {
strncpy(r2, s, len);
}
// Append the 0 terminator.
*(r2 + len) = 0;
return r;
}
byte parseHexByte(char ch1, char ch2) {
return (parseHexChar(ch1) << 4) | parseHexChar(ch2);
}
