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perf: mutate strings instead of copy when possible

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BREAKING CHANGE: Most of string functions mutates the string instead of copying now.
This allows better performance when copy is not needed.
It also allows more granual control.
If copy is wanted, simply use `string_copy` before calling the function.

Impacted functions are:
`string_to_uppercase`, `string_to_lowercase`, `string_replace`,
`string_trim_start`, `string_trim_end`, `string_trim`,
`string_capitalize`, `string_reverse`
This commit is contained in:
Théo LUDWIG
2023-08-06 23:17:07 +02:00
parent 01e9b71402
commit 72645da4b2
10 changed files with 193 additions and 222 deletions
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23
lib/convert.c
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@ -18,12 +18,12 @@ char convert_digit_to_character(const char digit) {
return digit + '0';
}
long long convert_string_to_number(const string_t string_value) {
bool is_negative = string_value[0] == '-';
long long convert_string_to_number(const string_t string) {
bool is_negative = string[0] == '-';
long long integer = 0;
size_t length = string_get_length(string_value);
size_t length = string_get_length(string);
for (size_t index = is_negative ? 1 : 0; index < length; index++) {
integer = integer * 10 + convert_character_to_digit(string_value[index]);
integer = integer * 10 + convert_character_to_digit(string[index]);
}
return is_negative ? integer * -1 : integer;
}
@ -42,23 +42,22 @@ string_t convert_number_to_string(const long long integer) {
if (is_negative) {
length++;
}
string_t string_value = malloc(sizeof(char) * length);
if (string_value == NULL) {
string_t string = malloc(sizeof(char) * length);
if (string == NULL) {
exit(EXIT_FAILURE);
}
current = mathematics_absolute_value(integer);
size_t index = 0;
while (current != 0) {
string_value[index++] = convert_digit_to_character(current % 10);
string[index++] = convert_digit_to_character(current % 10);
current = current / 10;
}
if (is_negative) {
string_value[index++] = '-';
string[index++] = '-';
}
string_value[index] = '\0';
char* result = string_reverse(string_value);
free(string_value);
return result;
string[index] = '\0';
string_reverse(string);
return string;
}
string_t convert_number_from_base_10_to_base(unsigned long long number, unsigned int base) {