Sha256: a0bc8191926c50b323ce30c2e4f7e338a80276a3598f652d4314a38adacf6a5a
Contents?: true
Size: 1.99 KB
Versions: 50
Compression:
Stored size: 1.99 KB
Contents
/*
Various conversion functions.
This file is licensed under the WTFPL which is found in the LICENSE file.
*/
#include "headers.h"
#include "valid_characters_string.h"
__attribute__((nonnull)) static void reverse_string(char* const restrict string, const u64 length) {
u64 i;
assert_comparison(string, !=, NULL);
for (i = 0; i < length / 2; ++i) {
char temp = ARRAY_INDEX(string, length - i - 1);
ARRAY_INDEX_ASSIGN(string, length - i - 1) = ARRAY_INDEX(string, i);
ARRAY_INDEX_ASSIGN(string, i) = temp;
}
}
/* Takes a u64 and returns a string of that number with commas in it. */
/* The string parameter should be at least 27 bytes long because the length of "18,446,744,073,709,551,615" plus 1 for the null byte equals 27. */
void add_commas_to_u64(u64 number, char* restrict const string) {
small_num_type character_offset, comma_counter;
assert_comparison(string, !=, NULL);
character_offset = 0;
comma_counter = 0;
do {
if (comma_counter == 3 && character_offset) {
ARRAY_INDEX_ASSIGN(string, character_offset) = ',';
++character_offset;
comma_counter = 0;
}
ARRAY_INDEX_ASSIGN(string, character_offset) = '0' + (number % 10);
++character_offset;
++comma_counter;
} while (number /= 10);
ARRAY_INDEX_ASSIGN(string, character_offset) = '\0';
assert_comparison(character_offset, <, 27);
reverse_string(string, character_offset);
}
/*
The string parameter should be at least 21 bytes long if base is 10 because
the length of "18446744073709551615" plus 1 for the null byte equals 21.
*/
void u64_to_string(u64 number, char* restrict const string, small_num_type base) {
small_num_type character_offset;
assert_comparison(string, !=, NULL);
assert_comparison(base, <=, 36);
character_offset = 0;
do {
ARRAY_INDEX_ASSIGN(string, character_offset) = ARRAY_INDEX(_CONVERSION__VALID_CHARACTERS_STRING, number % base);
character_offset++;
} while (number /= base);
ARRAY_INDEX_ASSIGN(string, character_offset) = '\0';
reverse_string(string, character_offset);
}
Version data entries
50 entries across 49 versions & 6 rubygems