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/*
* Copyright (C) the libgit2 contributors. All rights reserved.
*
* This file is part of libgit2, distributed under the GNU GPL v2 with
* a Linking Exception. For full terms see the included COPYING file.
*/
#include "utf-conv.h"
GIT_INLINE(void) git__set_errno(void)
{
if (GetLastError() == ERROR_INSUFFICIENT_BUFFER)
errno = ENAMETOOLONG;
else
errno = EINVAL;
}
int git_utf8_to_16(wchar_t *dest, size_t dest_size, const char *src)
{
/* Length of -1 indicates NULL termination of the input string. */
return git_utf8_to_16_with_len(dest, dest_size, src, -1);
}
int git_utf8_to_16_with_len(
wchar_t *dest,
size_t _dest_size,
const char *src,
int src_len)
{
int dest_size = (int)min(_dest_size, INT_MAX);
int len;
/*
* Subtract 1 from the result to turn 0 into -1 (an error code) and
* to not count the NULL terminator as part of the string's length.
* MultiByteToWideChar never returns int's minvalue, so underflow
* is not possible.
*/
len = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
src, src_len, dest, dest_size) - 1;
if (len < 0)
git__set_errno();
return len;
}
int git_utf8_from_16(char *dest, size_t dest_size, const wchar_t *src)
{
/* Length of -1 indicates NULL termination of the input string. */
return git_utf8_from_16_with_len(dest, dest_size, src, -1);
}
int git_utf8_from_16_with_len(
char *dest,
size_t _dest_size,
const wchar_t *src,
int src_len)
{
int dest_size = (int)min(_dest_size, INT_MAX);
int len;
/*
* Subtract 1 from the result to turn 0 into -1 (an error code) and
* to not count the NULL terminator as part of the string's length.
* WideCharToMultiByte never returns int's minvalue, so underflow
* is not possible.
*/
len = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS,
src, src_len, dest, dest_size, NULL, NULL) - 1;
if (len < 0)
git__set_errno();
return len;
}
int git_utf8_to_16_alloc(wchar_t **dest, const char *src)
{
/* Length of -1 indicates NULL termination of the input string. */
return git_utf8_to_16_alloc_with_len(dest, src, -1);
}
int git_utf8_to_16_alloc_with_len(wchar_t **dest, const char *src, int src_len)
{
int utf16_size;
*dest = NULL;
utf16_size = MultiByteToWideChar(CP_UTF8, MB_ERR_INVALID_CHARS,
src, src_len, NULL, 0);
if (!utf16_size) {
git__set_errno();
return -1;
}
*dest = git__mallocarray(utf16_size, sizeof(wchar_t));
GIT_ERROR_CHECK_ALLOC(*dest);
utf16_size = git_utf8_to_16_with_len(*dest, (size_t)utf16_size,
src, src_len);
if (utf16_size < 0) {
git__free(*dest);
*dest = NULL;
}
return utf16_size;
}
int git_utf8_from_16_alloc(char **dest, const wchar_t *src)
{
/* Length of -1 indicates NULL termination of the input string. */
return git_utf8_from_16_alloc_with_len(dest, src, -1);
}
int git_utf8_from_16_alloc_with_len(char **dest, const wchar_t *src, int src_len)
{
int utf8_size;
*dest = NULL;
utf8_size = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS,
src, src_len, NULL, 0, NULL, NULL);
if (!utf8_size) {
git__set_errno();
return -1;
}
*dest = git__malloc(utf8_size);
GIT_ERROR_CHECK_ALLOC(*dest);
utf8_size = WideCharToMultiByte(CP_UTF8, WC_ERR_INVALID_CHARS,
src, src_len, *dest, utf8_size, NULL, NULL);
if (utf8_size < 0) {
git__free(*dest);
*dest = NULL;
}
return utf8_size;
}
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