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#include "const_strings.h"
const_string cs_from_parts(const char* data, int len) {
const_string str;
str.data = data;
str.len = len;
return str;
}
const_string cs_from_cstr(const char* cstr) {
return cs_from_parts(cstr, strlen(cstr));
}
char* cs_to_cstr(const_string str) {
str.data[str.len] = '\0';
return str.data;
}
const_string cs_slice(const_string src, int from, int to) {
if (from > src.len) {
return src;
}
int new_from;
if (from <= 0) {
new_from = 1;
}
new_from -= 1;
int new_len;
if (to > src.len) {
new_len = src.len;
} else {
new_len = to;
}
return cs_from_parts(src.data + new_from, new_len);
}
const_string cs_chop_delim(const_string *str, char delim) {
int n;
for (n = 0; n < str->len && str->data[n] != delim; n++) {}
const_string result = cs_from_parts(str->data, n);
if (n < str->len) {
str->len -= n + 1;
str->data += n + 1;
} else {
str->len -= n;
str->data += n;
}
return result;
}
bool cs_try_chop_delim(const_string *str, char delim, const_string *dst) {
const_string str_copy = *str;
const_string tmp = cs_chop_delim(&str_copy, delim);
if (str_copy.len == 0) {
return false;
}
*str = str_copy;
*dst = tmp;
return true;
}
int cs_find_delim(const_string str, char delim) {
int n;
for (n = 0; n < str.len && str.data[n] != delim; n++) {}
if (n < str.len) {
return n;
}
return -1;
}
bool cs_eq(const_string str1, const_string str2) {
if (str1.len != str2.len) {
return false;
}
return memcmp(str1.data, str2.data, str1.len) == 0;
}
void cs_print(char *format, const_string str) {
char buf[str.len + 1];
memcpy(buf, str.data, str.len);
buf[str.len] = '\0';
printf(format, buf);
}
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