`std/string`

String conversion helpers.

#include "std/string.gof"

Types

CStr is a C-string pointer — an alias for *char[].

pub func CStr string_to_cstr[*string sv]

Returns the underlying C-string pointer of a string.

var s = "hello"
s call string_to_cstr    // *char[]

pub func CStr int_to_cstr[int num]

Converts an integer to a null-terminated C-string.

42 call int_to_cstr    // "42"

Negative numbers

Negative numbers are not supported. int_to_cstr returns 0 (null pointer) for negative input.

Shared buffer

The result points into a global static buffer. It is overwritten by the next call to int_to_cstr. Copy the result if you need to keep it.

The module uses two global buffers:

var int64_to_cstr_swap_buf char[20]
var int64_to_cstr_buf      char[20]

int_to_cstr writes digits in reverse into the swap buffer, then copies them in order into the output buffer and null-terminates.