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#include <cstring.h>
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
string string_new(const char* cstr) {
const size_t length = strlen(cstr);
const size_t size = length + 1;
char* data = calloc(size, sizeof(char));
ASSERT(data);
if (length > 0) {
memcpy(data, cstr, length);
}
return (string){
.data = data,
.length = length,
};
}
void string_del(string* str) {
if (str->data) {
free((void*)str->data);
str->data = 0;
str->length = 0;
}
}
string string_concat(string left, string right) {
const size_t length = left.length + right.length;
const size_t size = length + 1;
char* data = calloc(size, sizeof(char));
ASSERT(data);
if (length > 0) {
memcpy(data, left.data, left.length);
memcpy(data + left.length, right.data, right.length);
}
return (string){
.data = data,
.length = length,
};
}
string string_from_size(size_t size) {
const size_t length = snprintf(NULL, 0, "%zu", size) + 1;
char* data = calloc(length, sizeof(char));
ASSERT(data);
snprintf(data, length, "%zu", size);
return (string){
.data = data,
.length = length,
};
}
string string_format_size(size_t size) {
const size_t multiples[] = {1073741824, 1048576, 1024, 1};
const char* units[] = {"G", "M", "K", "B"};
size_t integer = 0;
size_t fractional = 0;
int i;
for (i = 0; i < 4; ++i) {
const size_t m = multiples[i];
if (size >= m) {
integer = size / m;
fractional = size % m;
break;
}
}
double s;
const char* unit;
const char* format;
if (i == 4) { // 0
s = (double)size;
unit = "";
format = "%f%s";
} else if (i == 3) { // Bytes
s = (double)integer + (double)fractional / (double)multiples[i];
unit = units[i];
format = "%.0f%s";
} else { // KB, MB, GB
assert(i >= 0);
assert(i < 3);
s = (double)integer + (double)fractional / (double)multiples[i];
unit = units[i];
format = "%.2f%s";
}
const size_t length = snprintf(NULL, 0, format, s, unit) + 1;
char* data = calloc(length, sizeof(char));
ASSERT(data);
snprintf(data, length, format, s, unit);
return (string){
.data = data,
.length = length,
};
}
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