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hidapi, libusb: don't use iconv on OS/2, it lacks wchar_t functionality.

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Taken from a patch by Silvan Scherrer at bitwiseworks' OS/2 fork.
This commit is contained in:
Ozkan Sezer 2022-01-14 14:39:04 +03:00
parent 9a2bbd8acb
commit e9511f7136
1 changed files with 25 additions and 0 deletions
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25
src/hidapi/libusb/hid.c
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@ -388,12 +388,16 @@ static int is_language_supported(libusb_device_handle *dev, uint16_t lang)
/* This function returns a newly allocated wide string containing the USB
device string numbered by the index. The returned string must be freed
by using free(). */
#if defined(__OS2__) /* don't use iconv on OS/2: no support for wchar_t. */
#define NO_ICONV
#endif
static wchar_t *get_usb_string(libusb_device_handle *dev, uint8_t idx)
{
char buf[512];
int len;
wchar_t *str = NULL;
#if !defined(NO_ICONV)
wchar_t wbuf[256];
SDL_iconv_t ic;
size_t inbytes;
@ -401,6 +405,9 @@ static wchar_t *get_usb_string(libusb_device_handle *dev, uint8_t idx)
size_t res;
const char *inptr;
char *outptr;
#else
int i;
#endif
/* Determine which language to use. */
uint16_t lang;
@ -417,6 +424,23 @@ static wchar_t *get_usb_string(libusb_device_handle *dev, uint8_t idx)
if (len < 0)
return NULL;
#if defined(NO_ICONV) /* original hidapi code for NO_ICONV : */
/* Bionic does not have wchar_t iconv support, so it
has to be done manually. The following code will only work for
code points that can be represented as a single UTF-16 character,
and will incorrectly convert any code points which require more
than one UTF-16 character.
Skip over the first character (2-bytes). */
len -= 2;
str = (wchar_t*) malloc((len / 2 + 1) * sizeof(wchar_t));
for (i = 0; i < len / 2; i++) {
str[i] = buf[i * 2 + 2] | (buf[i * 2 + 3] << 8);
}
str[len / 2] = 0x00000000;
#else
/* buf does not need to be explicitly NULL-terminated because
it is only passed into iconv() which does not need it. */
@ -449,6 +473,7 @@ static wchar_t *get_usb_string(libusb_device_handle *dev, uint8_t idx)
err:
SDL_iconv_close(ic);
#endif
return str;
}