minecraft-pi-reborn/libreborn/src/util/string.c

31 lines
916 B
C

#include <libreborn/string.h>
// Sanitize String
#define MINIMUM_SAFE_CHARACTER 32
#define MAXIMUM_SAFE_CHARACTER 126
void sanitize_string(char **str, int max_length, unsigned int allow_newlines) {
// Store Message Length
int length = strlen(*str);
// Truncate Message
if (max_length != -1 && length > max_length) {
(*str)[max_length] = '\0';
length = max_length;
}
// Loop Through Message
for (int i = 0; i < length; i++) {
if (allow_newlines && ((*str)[i] == '\n' || (*str)[i] == '\r')) {
continue;
}
unsigned char c = (unsigned char) (*str)[i];
if (c < MINIMUM_SAFE_CHARACTER || c > MAXIMUM_SAFE_CHARACTER) {
// Replace Illegal Character
(*str)[i] = '?';
}
}
}
// Starts With
int starts_with(const char *str, const char *prefix) {
return strncmp(prefix, str, strlen(prefix)) == 0;
}