514 lines
15 KiB
C
514 lines
15 KiB
C
/*
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* ntdll printf functions
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*
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* Copyright 1999, 2009 Alexandre Julliard
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* Copyright 2000 Jon Griffiths
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#ifdef PRINTF_WIDE
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#define APICHAR wchar_t
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#define APISTR(str) L"" str
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#define FUNC_NAME(func) func ## _w
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#else
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#define APICHAR char
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#define APISTR(str) str
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#define FUNC_NAME(func) func ## _a
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#endif
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typedef struct
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{
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APICHAR *buf;
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SIZE_T len;
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SIZE_T used;
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} FUNC_NAME(pf_output);
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/*
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* writes a string of characters to the output
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* returns -1 if the string doesn't fit in the output buffer
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* return the length of the string if all characters were written
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*/
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static int FUNC_NAME(pf_output_wstr)( FUNC_NAME(pf_output) *out, const WCHAR *str, int len )
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{
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SIZE_T space = out->len - out->used;
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APICHAR *p = out->buf + out->used;
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ULONG n;
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if (len < 0) len = wcslen( str );
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#ifdef PRINTF_WIDE
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n = len;
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if (out->buf) memcpy( p, str, min( n, space ) * sizeof(WCHAR) );
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#else
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RtlUnicodeToMultiByteSize( &n, str, len * sizeof(WCHAR) );
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if (out->buf) RtlUnicodeToMultiByteN( p, min( n, space ), NULL, str, len * sizeof(WCHAR) );
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#endif
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if (out->buf && space < n) /* overflow */
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{
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out->used = out->len;
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return -1;
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}
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out->used += n;
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return len;
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}
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static int FUNC_NAME(pf_output_str)( FUNC_NAME(pf_output) *out, const char *str, int len )
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{
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SIZE_T space = out->len - out->used;
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APICHAR *p = out->buf + out->used;
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ULONG n;
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if (len < 0) len = strlen( str );
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#ifdef PRINTF_WIDE
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RtlMultiByteToUnicodeSize( &n, str, len );
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n /= sizeof(WCHAR);
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if (out->buf) RtlMultiByteToUnicodeN( p, min( n, space ) * sizeof(WCHAR), NULL, str, len );
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#else
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n = len;
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if (out->buf) memcpy( p, str, min( n, space ));
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#endif
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if (out->buf && space < n) /* overflow */
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{
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out->used = out->len;
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return -1;
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}
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out->used += n;
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return len;
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}
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static int FUNC_NAME(pf_output_string)( FUNC_NAME(pf_output) *out, const APICHAR *str, int len )
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{
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#ifdef PRINTF_WIDE
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return FUNC_NAME(pf_output_wstr)( out, str, len );
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#else
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return FUNC_NAME(pf_output_str)( out, str, len );
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#endif
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}
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/* pf_fill: takes care of signs, alignment, zero and field padding */
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static int FUNC_NAME(pf_fill_left)( FUNC_NAME(pf_output) *out, int len, pf_flags *flags )
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{
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int i, r = 0;
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if (flags->Sign && !(flags->Format == 'd' || flags->Format == 'i')) flags->Sign = 0;
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if (flags->Sign)
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{
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APICHAR ch = flags->Sign;
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flags->FieldLength--;
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if (flags->PadZero) r = FUNC_NAME(pf_output_string)( out, &ch, 1 );
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}
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if (!flags->LeftAlign)
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{
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APICHAR ch = flags->PadZero ? '0' : ' ';
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for (i = 0; i < flags->FieldLength - len && r >= 0; i++)
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r = FUNC_NAME(pf_output_string)( out, &ch, 1 );
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}
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if (flags->Sign && !flags->PadZero && r >= 0)
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{
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APICHAR ch = flags->Sign;
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r = FUNC_NAME(pf_output_string)( out, &ch, 1 );
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}
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return r;
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}
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static int FUNC_NAME(pf_fill_right)( FUNC_NAME(pf_output) *out, int len, pf_flags *flags )
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{
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int i, r = 0;
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APICHAR ch = ' ';
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if (!flags->LeftAlign) return 0;
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for (i = 0; i < flags->FieldLength - len && r >= 0; i++)
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r = FUNC_NAME(pf_output_string)( out, &ch, 1 );
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return r;
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}
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static int FUNC_NAME(pf_output_format_wstr)( FUNC_NAME(pf_output) *out, const wchar_t *str, int len,
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pf_flags *flags )
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{
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int r = 0;
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if (len < 0)
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{
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/* Do not search past the length specified by the precision. */
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if (flags->Precision >= 0)
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{
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for (len = 0; len < flags->Precision; len++) if (!str[len]) break;
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}
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else len = wcslen( str );
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}
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if (flags->Precision >= 0 && flags->Precision < len) len = flags->Precision;
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r = FUNC_NAME(pf_fill_left)( out, len, flags );
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if (r >= 0) r = FUNC_NAME(pf_output_wstr)( out, str, len );
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if (r >= 0) r = FUNC_NAME(pf_fill_right)( out, len, flags );
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return r;
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}
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static int FUNC_NAME(pf_output_format_str)( FUNC_NAME(pf_output) *out, const char *str, int len,
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pf_flags *flags )
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{
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int r = 0;
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if (len < 0)
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{
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/* Do not search past the length specified by the precision. */
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if (flags->Precision >= 0)
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{
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for (len = 0; len < flags->Precision; len++) if (!str[len]) break;
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}
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else len = strlen(str);
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}
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if (flags->Precision >= 0 && flags->Precision < len) len = flags->Precision;
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r = FUNC_NAME(pf_fill_left)( out, len, flags );
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if (r >= 0) r = FUNC_NAME(pf_output_str)( out, str, len );
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if (r >= 0) r = FUNC_NAME(pf_fill_right)( out, len, flags );
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return r;
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}
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static int FUNC_NAME(pf_output_format)( FUNC_NAME(pf_output) *out, const APICHAR *str, int len,
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pf_flags *flags )
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{
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#ifdef PRINTF_WIDE
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return FUNC_NAME(pf_output_format_wstr)( out, str, len, flags );
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#else
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return FUNC_NAME(pf_output_format_str)( out, str, len, flags );
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#endif
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}
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static int FUNC_NAME(pf_handle_string_format)( FUNC_NAME(pf_output) *out, const void* str, int len,
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pf_flags *flags, BOOL inverted )
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{
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if (str == NULL) /* catch NULL pointer */
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return FUNC_NAME(pf_output_format)( out, APISTR("(null)"), -1, flags );
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/* prefixes take priority over %c,%s vs. %C,%S, so we handle them first */
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if (flags->WideString || flags->IntegerLength == LEN_LONG)
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return FUNC_NAME(pf_output_format_wstr)( out, str, len, flags );
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if (flags->IntegerLength == LEN_SHORT)
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return FUNC_NAME(pf_output_format_str)( out, str, len, flags );
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/* %s,%c -> chars in ansi functions & wchars in unicode
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* %S,%C -> wchars in ansi functions & chars in unicode */
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if (!inverted) return FUNC_NAME(pf_output_format)( out, str, len, flags);
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#ifdef PRINTF_WIDE
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return FUNC_NAME(pf_output_format_str)( out, str, len, flags );
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#else
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return FUNC_NAME(pf_output_format_wstr)( out, str, len, flags );
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#endif
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}
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/* pf_integer_conv: prints x to buf, including alternate formats and
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additional precision digits, but not field characters or the sign */
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static void FUNC_NAME(pf_integer_conv)( APICHAR *buf, pf_flags *flags, LONGLONG x )
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{
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unsigned int base;
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const APICHAR *digits;
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int i, j, k;
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if( flags->Format == 'o' )
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base = 8;
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else if( flags->Format == 'x' || flags->Format == 'X' )
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base = 16;
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else
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base = 10;
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if( flags->Format == 'X' )
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digits = APISTR("0123456789ABCDEFX");
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else
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digits = APISTR("0123456789abcdefx");
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if( x < 0 && ( flags->Format == 'd' || flags->Format == 'i' ) )
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{
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x = -x;
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flags->Sign = '-';
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}
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i = 0;
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if( x == 0 )
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{
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flags->Alternate = FALSE;
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if( flags->Precision )
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buf[i++] = '0';
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}
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else
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while( x != 0 )
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{
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j = (ULONGLONG) x % base;
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x = (ULONGLONG) x / base;
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buf[i++] = digits[j];
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}
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k = flags->Precision - i;
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while( k-- > 0 )
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buf[i++] = '0';
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if( flags->Alternate )
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{
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if( base == 16 )
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{
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buf[i++] = digits[16];
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buf[i++] = '0';
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}
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else if( base == 8 && buf[i-1] != '0' )
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buf[i++] = '0';
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}
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/* Adjust precision so pf_fill won't truncate the number later */
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flags->Precision = i;
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buf[i] = '\0';
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j = 0;
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while(--i > j) {
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APICHAR tmp = buf[j];
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buf[j] = buf[i];
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buf[i] = tmp;
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j++;
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}
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}
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static int FUNC_NAME(pf_vsnprintf)( FUNC_NAME(pf_output) *out, const APICHAR *format, __ms_va_list valist )
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{
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int r;
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const APICHAR *q, *p = format;
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pf_flags flags;
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while (*p)
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{
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for (q = p; *q; q++) if (*q == '%') break;
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if (q != p)
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{
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r = FUNC_NAME(pf_output_string)(out, p, q - p);
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if (r < 0) return r;
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p = q;
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if (!*p) break;
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}
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p++;
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/* output a single % character */
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if( *p == '%' )
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{
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r = FUNC_NAME(pf_output_string)(out, p++, 1);
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if( r<0 )
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return r;
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continue;
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}
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/* parse the flags */
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memset( &flags, 0, sizeof flags );
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while (*p)
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{
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if( *p == '+' || *p == ' ' )
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{
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if ( flags.Sign != '+' )
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flags.Sign = *p;
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}
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else if( *p == '-' )
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flags.LeftAlign = TRUE;
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else if( *p == '0' )
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flags.PadZero = TRUE;
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else if( *p == '#' )
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flags.Alternate = TRUE;
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else
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break;
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p++;
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}
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/* deal with the field width specifier */
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flags.FieldLength = 0;
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if( *p == '*' )
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{
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flags.FieldLength = va_arg( valist, int );
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if (flags.FieldLength < 0)
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{
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flags.LeftAlign = TRUE;
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flags.FieldLength = -flags.FieldLength;
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}
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p++;
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}
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else while (*p >= '0' && *p <= '9')
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{
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flags.FieldLength *= 10;
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flags.FieldLength += *p++ - '0';
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}
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/* deal with precision */
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flags.Precision = -1;
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if( *p == '.' )
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{
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flags.Precision = 0;
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p++;
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if( *p == '*' )
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{
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flags.Precision = va_arg( valist, int );
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p++;
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}
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else while (*p >= '0' && *p <= '9')
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{
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flags.Precision *= 10;
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flags.Precision += *p++ - '0';
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}
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}
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/* deal with integer width modifier */
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while( *p )
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{
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if (*p == 'l' && *(p+1) == 'l')
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{
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flags.IntegerDouble = TRUE;
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p += 2;
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}
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else if( *p == 'l' )
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{
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flags.IntegerLength = LEN_LONG;
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p++;
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}
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else if( *p == 'L' )
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{
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p++;
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}
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else if( *p == 'h')
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{
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flags.IntegerLength = LEN_SHORT;
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p++;
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}
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else if( *p == 'I' )
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{
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if( *(p+1) == '6' && *(p+2) == '4' )
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{
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flags.IntegerDouble = TRUE;
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p += 3;
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}
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else if( *(p+1) == '3' && *(p+2) == '2' )
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p += 3;
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else if( p[1] && strchr( "diouxX", p[1] ) )
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{
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if( sizeof(void *) == 8 )
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flags.IntegerDouble = TRUE;
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p++;
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}
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else if ((p[1] >= '0' && p[1] <= '9') || !p[1])
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break;
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else
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p++;
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}
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else if( *p == 'w' )
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{
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flags.WideString = TRUE;
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p++;
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}
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else if ((*p == 'z' || *p == 't') && p[1] && strchr("diouxX", p[1]))
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{
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flags.IntegerNative = TRUE;
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p++;
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}
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else if (*p == 'j')
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{
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flags.IntegerDouble = TRUE;
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p++;
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}
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else if( *p == 'F' )
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p++; /* ignore */
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else
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break;
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}
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flags.Format = *p;
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r = 0;
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if (flags.Format == '$')
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{
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FIXME("Positional parameters are not supported (%s)\n", FUNC_NAME(wine_dbgstr)(format));
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return -1;
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}
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/* output a string */
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if( flags.Format == 's' || flags.Format == 'S' )
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r = FUNC_NAME(pf_handle_string_format)( out, va_arg(valist, const void*), -1,
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&flags, (flags.Format == 'S') );
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/* output a single character */
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else if( flags.Format == 'c' || flags.Format == 'C' )
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{
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APICHAR ch = (APICHAR)va_arg( valist, int );
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r = FUNC_NAME(pf_handle_string_format)( out, &ch, 1, &flags, (flags.Format == 'C') );
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}
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/* output a pointer */
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else if( flags.Format == 'p' )
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{
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APICHAR pointer[32];
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void *ptr = va_arg( valist, void * );
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int prec = flags.Precision;
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flags.Format = 'X';
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flags.PadZero = TRUE;
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flags.Precision = 2*sizeof(void*);
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FUNC_NAME(pf_integer_conv)( pointer, &flags, (ULONG_PTR)ptr );
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flags.PadZero = FALSE;
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flags.Precision = prec;
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r = FUNC_NAME(pf_output_format)( out, pointer, -1, &flags );
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}
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/* deal with %n */
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else if( flags.Format == 'n' )
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{
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int *x = va_arg(valist, int *);
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*x = out->used;
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}
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else if( flags.Format && strchr("diouxX", flags.Format ))
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{
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APICHAR number[40], *x = number;
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int max_len;
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/* 0 padding is added after '0x' if Alternate flag is in use */
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if((flags.Format=='x' || flags.Format=='X') && flags.PadZero && flags.Alternate
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&& !flags.LeftAlign && flags.Precision<flags.FieldLength-2)
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flags.Precision = flags.FieldLength - 2;
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max_len = (flags.FieldLength>flags.Precision ? flags.FieldLength : flags.Precision) + 10;
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if(max_len > ARRAY_SIZE(number))
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if (!(x = RtlAllocateHeap( GetProcessHeap(), 0, max_len * sizeof(*x) ))) return -1;
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if(flags.IntegerDouble || (flags.IntegerNative && sizeof(void*) == 8))
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FUNC_NAME(pf_integer_conv)( x, &flags, va_arg(valist, LONGLONG) );
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else if(flags.Format=='d' || flags.Format=='i')
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FUNC_NAME(pf_integer_conv)( x, &flags, flags.IntegerLength != LEN_SHORT ?
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va_arg(valist, int) : (short)va_arg(valist, int) );
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else
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FUNC_NAME(pf_integer_conv)( x, &flags, flags.IntegerLength != LEN_SHORT ?
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(unsigned int)va_arg(valist, int) : (unsigned short)va_arg(valist, int) );
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r = FUNC_NAME(pf_output_format)( out, x, -1, &flags );
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if( x != number )
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RtlFreeHeap( GetProcessHeap(), 0, x );
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}
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else
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continue;
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if( r<0 )
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return r;
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p++;
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}
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return out->used;
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}
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#undef APICHAR
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#undef APISTR
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#undef FUNC_NAME
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