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#include <ctype.h>
#include <math.h>
#include <stdlib.h>
#include <string.h>
#include <tb/sv.h>
char *SV_TO_C(struct sv s) {
char *c_string = malloc(s.length + 1);
memcpy(c_string, s.s, s.length);
c_string[s.length] = '\0';
return c_string;
}
size_t sv_to_cstring_buffer(struct sv s, char *buffer, size_t length) {
if (0 == length || length - 1 < s.length) {
return s.length;
}
memcpy(buffer, s.s, s.length);
buffer[s.length] = '\0';
return s.length;
}
struct sv sv_next(struct sv s) {
if (0 == s.length) {
return s;
}
s.length--;
s.s++;
return s;
}
struct sv sv_skip_chars(const struct sv input, const char *chars) {
struct sv r = input;
for (; r.length > 0;) {
int found = 0;
const char *p = chars;
for (; *p; p++) {
if (*p == r.s[0]) {
r.s++;
r.length--;
found = 1;
break;
}
}
if (!found) {
break;
}
}
return r;
}
uint64_t sv_parse_unsigned_number(struct sv input, struct sv *rest) {
uint64_t r = 0;
size_t i = 0;
for (; i < input.length; i++) {
if (!isdigit(input.s[i])) {
break;
}
r *= 10;
r += input.s[i] - '0';
}
input.length -= i;
input.s += i;
if (rest) {
*rest = input;
}
return r;
}
struct sv sv_split_function(const struct sv input, struct sv *rest,
int (*function)(int)) {
struct sv r = {
.s = input.s,
};
for (size_t i = 0; i < input.length; i++) {
if (function(input.s[i])) {
r.length = i;
if (rest) {
rest->s += i;
rest->length -= i;
}
return r;
}
}
if (rest) {
rest->s = NULL;
rest->length = 0;
}
return input;
}
struct sv sv_split_space(const struct sv input, struct sv *rest) {
return sv_split_function(input, rest, isspace);
}
struct sv sv_end_split_delim(const struct sv input, struct sv *rest,
char delim) {
for (size_t i = input.length - 1; i > 0; i--) {
if (delim == input.s[i]) {
struct sv r = {
.s = (input.s + i),
.length = input.length - i,
};
if (rest) {
rest->s = input.s;
rest->length = i;
}
return r;
}
}
if (rest) {
rest->s = NULL;
rest->length = 0;
}
return input;
}
struct sv sv_split_delim(const struct sv input, struct sv *rest, char delim) {
struct sv r = {
.s = input.s,
};
for (size_t i = 0; i < input.length; i++) {
if (delim == input.s[i]) {
r.length = i;
if (rest) {
rest->s += i + 1;
rest->length -= (i + 1);
}
return r;
}
}
if (rest) {
rest->s = NULL;
rest->length = 0;
}
return input;
}
int sv_isempty(struct sv s) {
return (0 == s.length);
}
char sv_peek(struct sv s) {
if (0 == s.length) {
return '\0';
}
return s.s[0];
}
int sv_partial_eq(struct sv a, struct sv b) {
if (a.length < b.length) {
return 0;
}
for (size_t i = 0; i < b.length; i++) {
if (a.s[i] != b.s[i]) {
return 0;
}
}
return 1;
}
int sv_eq(struct sv a, struct sv b) {
if (a.length != b.length) {
return 0;
}
for (size_t i = 0; i < a.length; i++) {
if (a.s[i] != b.s[i]) {
return 0;
}
}
return 1;
}
struct sv sv_take(struct sv s, struct sv *rest, size_t n) {
if (s.length < n) {
if (rest) {
rest->length = 0;
}
return s;
}
s.length = n;
if (rest) {
rest->length -= n;
rest->s += n;
}
return s;
}
struct sv sv_take_end(struct sv s, struct sv *rest, size_t n) {
if (s.length < n) {
if (rest) {
rest->length = 0;
}
return s;
}
if (rest) {
rest->length = s.length - n;
}
s.s += (s.length - n);
s.length = n;
return s;
}
struct sv sv_trim_left(struct sv s, size_t n) {
if (s.length < n) {
s.s += s.length;
s.length = 0;
return s;
}
s.s += n;
s.length -= n;
return s;
}
struct sv sv_clone(struct sv s) {
struct sv new_sv;
new_sv.length = s.length;
char *new_string = malloc(s.length);
memcpy(new_string, s.s, s.length);
new_sv.s = new_string;
return new_sv;
}
char *sv_copy_to_c(struct sv s, char *out, size_t buffer_length) {
int copy_len = min(s.length + 1, buffer_length);
if (0 == copy_len) {
return NULL;
}
if (!out) {
out = malloc(copy_len);
}
memcpy(out, s.s, copy_len - 1);
out[copy_len - 1] = '\0';
return out;
}
struct sv sv_clone_from_c(const char *s) {
return sv_clone(C_TO_SV(s));
}
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