file_get_wstr.c

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/* get # function for wstrings */

#include "fb.h"

int fb_FileGetWstrEx
        (
                FB_FILE *handle,
                fb_off_t pos,
                FB_WCHAR *dst,
                ssize_t dst_chars,
                size_t *bytesread
        )
{
    int res;

        if( bytesread )
                *bytesread = 0;

    if( !FB_HANDLE_USED(handle) )
                return fb_ErrorSetNum( FB_RTERROR_ILLEGALFUNCTIONCALL );

        /* perform call ... but only if there's data ... */
    if( (dst != NULL) && (dst_chars > 0) )
    {
        size_t chars;
        res = fb_FileGetDataEx( handle, pos, (void *)dst, dst_chars, &chars, TRUE, TRUE );

        /* add the null-term */
        if( res == FB_RTERROR_OK )
                dst[chars] = _LC('\0');

                if( bytesread )
                        *bytesread = chars;
    }
    else
                res = fb_ErrorSetNum( FB_RTERROR_ILLEGALFUNCTIONCALL );

        return res;
}

FBCALL int fb_FileGetWstr( int fnum, int pos, FB_WCHAR *dst, ssize_t dst_chars )
{
        return fb_FileGetWstrEx( FB_FILE_TO_HANDLE(fnum), pos, dst, dst_chars, NULL );
}

FBCALL int fb_FileGetWstrLarge( int fnum, long long pos, FB_WCHAR *dst, ssize_t dst_chars )
{
        return fb_FileGetWstrEx( FB_FILE_TO_HANDLE(fnum), pos, dst, dst_chars, NULL );
}

FBCALL int fb_FileGetWstrIOB( int fnum, int pos, FB_WCHAR *dst, ssize_t dst_chars, size_t *bytesread )
{
        return fb_FileGetWstrEx( FB_FILE_TO_HANDLE(fnum), pos, dst, dst_chars, bytesread );
}

FBCALL int fb_FileGetWstrLargeIOB( int fnum, long long pos, FB_WCHAR *dst, ssize_t dst_chars, size_t *bytesread )
{
        return fb_FileGetWstrEx( FB_FILE_TO_HANDLE(fnum), pos, dst, dst_chars, bytesread );
}