int string_length(char *s) {
|
|
return strlen(s);
|
|
}
|
|
|
|
char* string_upper(char *s) {
|
|
return upper(s);
|
|
}
|
|
|
|
char* string_lower(char *s) {
|
|
return lower(s);
|
|
}
|
|
|
|
int string_contains(char *haystack, char *needle) {
|
|
int pos = strpos(haystack, needle);
|
|
if (pos >= 0) {
|
|
return 1;
|
|
}
|
|
return 0;
|
|
}
|