144 lines
3.9 KiB
C++
144 lines
3.9 KiB
C++
/* strfuncs.cc: misc funcs that don't belong anywhere else
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Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004,
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2005, 2006, 2007, 2008, 2009 Red Hat, Inc.
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This file is part of Cygwin.
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This software is a copyrighted work licensed under the terms of the
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Cygwin license. Please consult the file "CYGWIN_LICENSE" for
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details. */
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#include "winsup.h"
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#include <stdlib.h>
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#include <wchar.h>
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#include <winnls.h>
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#include <ntdll.h>
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#include "cygerrno.h"
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#include "security.h"
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#include "path.h"
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#include "fhandler.h"
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#include "dtable.h"
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#include "cygheap.h"
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UINT
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get_cp ()
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{
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if (!active_codepage)
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codepage_init ("ansi");
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return active_codepage;
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}
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/* tlen is always treated as the maximum buffer size, including the '\0'
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character. sys_wcstombs will always return a 0-terminated result, no
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matter what. */
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int __stdcall
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sys_wcstombs (char *tgt, int tlen, const PWCHAR src, int slen)
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{
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int ret;
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/* Convert UNICODE private use area. Reverse functionality (only for
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path names) is transform_chars in path.cc. */
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if (slen < 0)
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slen = wcslen (src) + 1;
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WCHAR sbuf[slen];
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memcpy (sbuf, src, slen * sizeof (WCHAR));
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const unsigned char *end = (unsigned char *) (sbuf + slen);
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for (unsigned char *s = ((unsigned char *) sbuf) + 1; s < end;
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s += sizeof (WCHAR))
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if (*s == 0xf0)
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*s = 0;
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ret = WideCharToMultiByte (get_cp (), 0, sbuf, slen, tgt, tlen, NULL, NULL);
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if (ret && tgt)
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{
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ret = (ret < tlen) ? ret : tlen - 1;
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tgt[ret] = '\0';
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}
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return ret;
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}
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/* Allocate a buffer big enough for the string, always including the
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terminating '\0'. The buffer pointer is returned in *tgt_p, the return
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value is the number of bytes written to the buffer, as usual.
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The "type" argument determines where the resulting buffer is stored.
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It's either one of the cygheap_types values, or it's "HEAP_NOTHEAP".
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In the latter case the allocation uses simple calloc.
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Note that this code is shared by cygserver (which requires it via
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__small_vsprintf) and so when built there plain calloc is the
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only choice. */
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int __stdcall
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sys_wcstombs_alloc (char **tgt_p, int type, const PWCHAR src, int slen)
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{
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int ret;
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ret = WideCharToMultiByte (get_cp (), 0, src, slen, NULL, 0 ,NULL, NULL);
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if (ret)
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{
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size_t tlen = (slen == -1) ? ret : ret + 1;
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if (type == HEAP_NOTHEAP)
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*tgt_p = (char *) calloc (tlen, sizeof (char));
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else
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*tgt_p = (char *) ccalloc ((cygheap_types) type, tlen, sizeof (char));
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if (!*tgt_p)
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return 0;
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ret = sys_wcstombs (*tgt_p, tlen, src, slen);
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}
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return ret;
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}
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int __stdcall
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sys_mbstowcs (PWCHAR tgt, int tlen, const char *src, int slen)
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{
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int ret = MultiByteToWideChar (get_cp (), 0, src, slen, tgt, tlen);
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if (ret && tgt)
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{
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ret = (ret < tlen) ? ret : tlen - 1;
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tgt[ret] = L'\0';
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}
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return ret;
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}
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/* Same as sys_wcstombs_alloc, just backwards. */
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int __stdcall
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sys_mbstowcs_alloc (PWCHAR *tgt_p, int type, const char *src, int slen)
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{
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int ret;
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ret = MultiByteToWideChar (get_cp (), 0, src, slen, NULL, 0);
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if (ret)
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{
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size_t tlen = (slen == -1 ? ret : ret + 1);
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if (type == HEAP_NOTHEAP)
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*tgt_p = (PWCHAR) calloc (tlen, sizeof (WCHAR));
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else
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*tgt_p = (PWCHAR) ccalloc ((cygheap_types) type, tlen, sizeof (WCHAR));
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if (!*tgt_p)
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return 0;
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ret = sys_mbstowcs (*tgt_p, tlen, src, slen);
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}
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return ret;
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}
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static WCHAR hex_wchars[] = L"0123456789abcdef";
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NTSTATUS NTAPI
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RtlInt64ToHexUnicodeString (ULONGLONG value, PUNICODE_STRING dest,
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BOOLEAN append)
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{
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USHORT len = append ? dest->Length : 0;
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if (dest->MaximumLength - len < 16 * (int) sizeof (WCHAR))
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return STATUS_BUFFER_OVERFLOW;
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PWCHAR end = (PWCHAR) ((PBYTE) dest->Buffer + len);
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register PWCHAR p = end + 16;
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while (p-- > end)
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{
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*p = hex_wchars[value & 0xf];
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value >>= 4;
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}
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dest->Length += 16 * sizeof (WCHAR);
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return STATUS_SUCCESS;
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}
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