855 lines
24 KiB
C
855 lines
24 KiB
C
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/************************************************************
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* lib_libvsprintf.c
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*
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* Copyright (C) 2007 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <spudmonkey@racsa.co.cr>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name Gregory Nutt nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************/
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/************************************************************
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* Compilation Switches
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************************************************************/
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/************************************************************
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* Included Files
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************************************************************/
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#include <sys/types.h>
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#include <stdio.h>
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#include <string.h>
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#include "lib_internal.h"
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/************************************************************
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* Definitions
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************************************************************/
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enum
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{
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FMT_RJUST = 0, /* Default */
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FMT_LJUST,
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FMT_RJUST0,
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FMT_CENTER
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};
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/************************************************************
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* Private Type Declarations
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************************************************************/
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/************************************************************
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* Private Function Prototypes
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************************************************************/
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static void utodec(char **pp, unsigned int n);
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static void _utodec(char **pp, unsigned int n);
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static void utohex(char **pp, unsigned int n);
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static void _utohex(char **pp, unsigned int n);
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static void utooct(char **pp, unsigned int n);
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static void _utooct(char **pp, unsigned int n);
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static void utobin(char **pp, unsigned int n);
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static void _utobin(char **pp, unsigned int n);
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#ifdef CONFIG_HAVE_LONG_LONG
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static void llutodec(char **pp, unsigned long long n);
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static void _llutodec(char **pp, unsigned long long n);
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static void llutohex(char **pp, unsigned long long n);
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static void _llutohex(char **pp, unsigned long long n);
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static void llutooct(char **pp, unsigned long long n);
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static void _llutooct(char **pp, unsigned long long n);
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static void llutobin(char **pp, unsigned long long n);
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static void _llutobin(char **pp, unsigned long long n);
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#endif
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/************************************************************
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* Global Constant Data
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************************************************************/
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/************************************************************
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* Global Variables
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************************************************************/
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/************************************************************
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* Private Constant Data
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************************************************************/
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static const char g_nullstring[] = "(null)";
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/************************************************************
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* Private Variables
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************************************************************/
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/************************************************************
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* Private Functions
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************************************************************/
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static void utodec(char **pp, unsigned int n)
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{
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_utodec(pp, n);
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**pp = 0;
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}
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static void _utodec(char **pp, unsigned int n)
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{
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unsigned int remainder = n % 10;
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unsigned int dividend = n / 10;
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if (dividend)
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{
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_utodec(pp, dividend);
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}
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**pp = (char)(remainder + (unsigned int)'0');
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(*pp)++;
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}
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static void utohex(char **pp, unsigned int n)
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{
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_utohex(pp, n);
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**pp = 0;
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}
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static void _utohex(char **pp, unsigned int n)
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{
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unsigned int remainder = n & 0xf;
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unsigned int dividend = n >> 4;
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if (dividend)
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{
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_utohex(pp, dividend);
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}
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if (remainder < 10)
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{
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**pp = (char)(remainder + (unsigned int)'0');
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}
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else
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{
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**pp = (char)(remainder + ((unsigned int)'a' - 10));
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}
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(*pp)++;
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}
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static void utooct(char **pp, unsigned int n)
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{
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_utooct(pp, n);
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**pp = 0;
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}
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static void _utooct(char **pp, unsigned int n)
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{
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unsigned int remainder = n & 0x7;
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unsigned int dividend = n >> 3;
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if (dividend)
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{
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_utooct(pp, dividend);
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}
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**pp = (char)(remainder + (unsigned int)'0');
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(*pp)++;
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}
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static void utobin(char **pp, unsigned int n)
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{
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_utobin(pp, n);
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**pp = 0;
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}
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static void _utobin(char **pp, unsigned int n)
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{
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unsigned int remainder = n & 1;
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unsigned int dividend = n >> 1;
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if (dividend)
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{
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_utobin(pp, dividend);
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}
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**pp = (char)(remainder + (unsigned int)'0');
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(*pp)++;
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}
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#ifdef CONFIG_HAVE_LONG_LONG
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static void llutodec(char **pp, unsigned long long n)
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{
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_llutodec(pp, n);
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**pp = 0;
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}
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static void _llutodec(char **pp, unsigned long long n)
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{
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unsigned int remainder = n % 10;
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unsigned long long dividend = n / 10;
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if (dividend)
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{
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_llutodec(pp, dividend);
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}
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**pp = (char)(remainder + (unsigned int)'0');
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(*pp)++;
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}
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static void llutohex(char **pp, unsigned long long n)
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{
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_llutohex(pp, n);
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**pp = 0;
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}
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static void _llutohex(char **pp, unsigned long long n)
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{
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unsigned int remainder = n & 0xf;
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unsigned long long dividend = n >> 4;
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if (dividend)
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{
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_llutohex(pp, dividend);
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}
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if (remainder < 10)
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{
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**pp = (char)(remainder + (unsigned int)'0');
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}
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else
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{
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**pp = (char)(remainder + ((unsigned int)'a' - 10));
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}
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(*pp)++;
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}
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static void llutooct(char **pp, unsigned long long n)
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{
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_llutooct(pp, n);
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**pp = 0;
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}
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static void _llutooct(char **pp, unsigned long long n)
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{
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unsigned int remainder = n & 0x7;
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unsigned long long dividend = n >> 3;
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if (dividend)
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{
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_llutooct(pp, dividend);
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}
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**pp = (char)(remainder + (unsigned int)'0');
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(*pp)++;
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}
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static void llutobin(char **pp, unsigned long long n)
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{
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_llutobin(pp, n);
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**pp = 0;
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}
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static void _llutobin(char **pp, unsigned long long n)
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{
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unsigned int remainder = n & 1;
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unsigned long long dividend = n >> 1;
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if (dividend)
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{
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_llutobin(pp, dividend);
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}
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**pp = (char)(remainder + (unsigned int)'0');
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(*pp)++;
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}
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#endif /* CONFIG_HAVE_LONG_LONG */
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/************************************************************
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* Public Functions
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************************************************************/
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/************************************************************
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* lib_vsprintf
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************************************************************/
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int lib_vsprintf(struct lib_stream_s *obj, const char *src, va_list ap)
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{
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char *ptmp;
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char tmp[40];
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const char *pfmt;
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unsigned int n;
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int fmt, width, trunc, tmpwidth;
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int showplus, altform, longlong;
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int hasdot, hasasteriskwidth, hasasterisktrunc;
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for (; *src; src++)
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{
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/* Just copy regular characters */
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if (*src != '%')
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{
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obj->put(obj, *src);
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}
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else
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{
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/* We have found a format specifier. Move past it. */
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pfmt = src;
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src++;
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fmt = FMT_RJUST; /* Assume right justification. */
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width = trunc = 0;
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showplus = altform = longlong = 0;
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hasdot = hasasteriskwidth = hasasterisktrunc = 0;
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/* Process each format qualifier. */
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for (; *src; src++)
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{
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/* Break out of the loop when the format is known. */
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if (strchr("diuxXpobeEfgGlLsc%", *src))
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{
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break;
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}
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/* Check for left justification. */
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else if (*src == '-')
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{
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fmt = FMT_LJUST;
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}
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/* Check for leading zero fill right justification. */
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else if (*src == '0')
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{
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fmt = FMT_RJUST0;
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}
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#if 0
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/* Center justification. */
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else if (*src == '~')
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{
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fmt = FMT_CENTER;
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}
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#endif
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else if (*src == '*')
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{
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int value = va_arg(ap, int);
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if (hasdot)
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{
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trunc = value;
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hasasterisktrunc = 1;
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}
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else
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{
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width = value;
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hasasteriskwidth = 1;
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}
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}
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/* Check for field width */
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else if (((*src) >= '1') && ((*src) <= '9'))
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{
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/* Accumulate the field width integer. */
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n = ((int)(*src)) - (int)'0';
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for (src++; (((*src) >= '0') && ((*src) <= '9')); src++)
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{
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n = 10*n + (((int)(*src)) - (int)'0');
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}
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if (hasdot) trunc = n;
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else width = n;
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/* Back up to the last digit. */
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src--;
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}
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/* Check for a decimal point. */
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else if (*src == '.')
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{
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hasdot = 1;
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}
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/* Check for leading plus sign. */
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else if (*src == '+')
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{
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showplus = 1;
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}
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/* Check for alternate form. */
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else if (*src == '#')
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{
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altform = 1;
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}
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}
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/* "%%" means that a literal '%' was intended (instead of a format
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* specification).
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*/
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if (*src == '%')
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{
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obj->put(obj, '%');
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}
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/* Check for the string format. */
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else if (*src == 's')
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{
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/* Just concatenate the string into the output */
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ptmp = va_arg(ap, char *);
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if (!ptmp) ptmp = (char*)g_nullstring;
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while(*ptmp)
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{
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obj->put(obj, *ptmp);
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ptmp++;
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}
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}
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/* Check for the character output */
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else if (*src == 'c')
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{
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/* Just copy the character into the output. */
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n = va_arg(ap, int);
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obj->put(obj, n);
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}
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else
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{
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/* Check for the long long prefix. */
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if (*src == 'L')
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{
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longlong = 1;
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++src;
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}
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else if (*src == 'l')
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{
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if (*++src == 'l')
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{
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longlong = 1;
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++src;
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}
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}
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/* Get the ascii format into the tmp[] buffer. */
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ptmp = tmp;
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/* Handle integer conversions */
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if (strchr("diuxXpob", *src))
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{
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#ifdef CONFIG_HAVE_LONG_LONG
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if ((longlong) && (*src != 'p'))
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{
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/* Extract the long long value. */
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long long lln = va_arg(ap, long long);
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/* Perform the integer conversion according to the
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* format specifier
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*/
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switch (*src)
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{
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case 'd':
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case 'i':
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/* Signed base 10 */
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{
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/* Check for leading +/- */
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if (lln < 0)
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{
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*ptmp++ = '-';
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*ptmp = 0;
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lln = -lln;
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}
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else if (showplus)
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{
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*ptmp++ = '+';
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*ptmp = 0;
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}
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/* Convert the unsigned value to a string. */
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llutodec(&ptmp, (unsigned long long)lln);
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}
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break;
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case 'u':
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/* Unigned base 10 */
|
||
|
{
|
||
|
/* Check for leading + */
|
||
|
|
||
|
if (showplus)
|
||
|
{
|
||
|
*ptmp++ = '+';
|
||
|
*ptmp = 0;
|
||
|
}
|
||
|
|
||
|
/* Convert the unsigned value to a string. */
|
||
|
|
||
|
llutodec(&ptmp, (unsigned long long)lln);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case 'p':
|
||
|
case 'x':
|
||
|
case 'X':
|
||
|
/* Hexadecimal */
|
||
|
{
|
||
|
/* Check for alternate form */
|
||
|
|
||
|
if (altform)
|
||
|
{
|
||
|
/* Prefix the number with "0x" */
|
||
|
|
||
|
*ptmp++ = '0';
|
||
|
*ptmp++ = 'x';
|
||
|
*ptmp = 0;
|
||
|
}
|
||
|
|
||
|
/* Convert the unsigned value to a string. */
|
||
|
|
||
|
llutohex(&ptmp, (unsigned long long)lln);
|
||
|
|
||
|
/* Check for upper case conversion. */
|
||
|
|
||
|
if ((*src) == 'X')
|
||
|
{
|
||
|
for (ptmp = tmp; *ptmp; ptmp++)
|
||
|
{
|
||
|
if (((*ptmp) >= 'a') && ((*ptmp) <= 'z'))
|
||
|
{
|
||
|
/* Convert to upper case. */
|
||
|
|
||
|
*ptmp += (char)((int)'A' - (int)'a');
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case 'o':
|
||
|
/* Octal */
|
||
|
{
|
||
|
/* Check for alternate form */
|
||
|
|
||
|
if (altform)
|
||
|
{
|
||
|
/* Prefix the number with '0' */
|
||
|
|
||
|
*ptmp++ = '0';
|
||
|
*ptmp = 0;
|
||
|
}
|
||
|
|
||
|
/* Convert the unsigned value to a string. */
|
||
|
|
||
|
llutooct(&ptmp, (unsigned long long)lln);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case 'b':
|
||
|
/* Binary */
|
||
|
{
|
||
|
/* Convert the unsigned value to a string. */
|
||
|
|
||
|
llutobin(&ptmp, (unsigned long long)lln);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
#endif /* CONFIG_HAVE_LONG_LONG */
|
||
|
/* Extract the integer value */
|
||
|
|
||
|
n = va_arg(ap, int);
|
||
|
|
||
|
/* Perform the integer conversion according to the
|
||
|
* format specifier
|
||
|
*/
|
||
|
|
||
|
switch (*src)
|
||
|
{
|
||
|
case 'd':
|
||
|
case 'i':
|
||
|
/* Signed base 10 */
|
||
|
{
|
||
|
/* Check for leading +/- */
|
||
|
|
||
|
if ((int)n < 0)
|
||
|
{
|
||
|
*ptmp++ = '-';
|
||
|
*ptmp = 0;
|
||
|
n = -n;
|
||
|
}
|
||
|
else if (showplus)
|
||
|
{
|
||
|
*ptmp++ = '+';
|
||
|
*ptmp = 0;
|
||
|
}
|
||
|
|
||
|
/* Convert the unsigned value to a string. */
|
||
|
|
||
|
utodec(&ptmp, (unsigned int)n);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case 'u':
|
||
|
/* Unigned base 10 */
|
||
|
{
|
||
|
/* Check for leading + */
|
||
|
|
||
|
if (showplus)
|
||
|
{
|
||
|
*ptmp++ = '+';
|
||
|
*ptmp = 0;
|
||
|
}
|
||
|
|
||
|
/* Convert the unsigned value to a string. */
|
||
|
|
||
|
utodec(&ptmp, (unsigned int)n);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case 'x':
|
||
|
case 'X':
|
||
|
case 'p':
|
||
|
/* Hexadecimal */
|
||
|
{
|
||
|
/* Check for alternate form */
|
||
|
|
||
|
if (altform)
|
||
|
{
|
||
|
/* Prefix the number with "0x" */
|
||
|
|
||
|
*ptmp++ = '0';
|
||
|
*ptmp++ = 'x';
|
||
|
*ptmp = 0;
|
||
|
}
|
||
|
|
||
|
/* Convert the unsigned value to a string. */
|
||
|
|
||
|
utohex(&ptmp, (unsigned int)n);
|
||
|
|
||
|
/* Check for upper case conversion. */
|
||
|
|
||
|
if ((*src) == 'X')
|
||
|
{
|
||
|
for (ptmp = tmp; *ptmp; ptmp++)
|
||
|
{
|
||
|
if (((*ptmp) >= 'a') && ((*ptmp) <= 'z'))
|
||
|
{
|
||
|
/* Convert to upper case. */
|
||
|
|
||
|
*ptmp += (char)((int)'A' - (int)'a');
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
else if ((*src) == 'p')
|
||
|
{
|
||
|
if ((!width) && (fmt == FMT_RJUST))
|
||
|
{
|
||
|
if (altform) width = 10;
|
||
|
else width = 8;
|
||
|
|
||
|
fmt = FMT_RJUST0;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case 'o':
|
||
|
/* Octal */
|
||
|
{
|
||
|
/* Check for alternate form */
|
||
|
|
||
|
if (altform)
|
||
|
{
|
||
|
/* Prefix the number with '0' */
|
||
|
|
||
|
*ptmp++ = '0';
|
||
|
*ptmp = 0;
|
||
|
}
|
||
|
|
||
|
/* Convert the unsigned value to a string. */
|
||
|
|
||
|
utooct(&ptmp, (unsigned int)n);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case 'b':
|
||
|
/* Binary */
|
||
|
{
|
||
|
/* Convert the unsigned value to a string. */
|
||
|
|
||
|
utobin(&ptmp, (unsigned int)n);
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
default:
|
||
|
break;
|
||
|
}
|
||
|
#ifdef CONFIG_HAVE_LONG_LONG
|
||
|
}
|
||
|
#endif /* CONFIG_HAVE_LONG_LONG */
|
||
|
|
||
|
/* Now, get the "real" field width of the integer value*/
|
||
|
|
||
|
tmpwidth = strlen(tmp);
|
||
|
if (width <= tmpwidth)
|
||
|
{
|
||
|
/* Just copy the string. */
|
||
|
|
||
|
for (ptmp = tmp; *ptmp; )
|
||
|
{
|
||
|
obj->put(obj, *ptmp);
|
||
|
ptmp++;
|
||
|
}
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
/* Apply field justification to the integer value. */
|
||
|
|
||
|
switch (fmt)
|
||
|
{
|
||
|
default:
|
||
|
case FMT_RJUST:
|
||
|
for (n = width - tmpwidth; n; n--)
|
||
|
{
|
||
|
obj->put(obj, ' ');
|
||
|
}
|
||
|
|
||
|
for (ptmp = tmp; *ptmp; )
|
||
|
{
|
||
|
obj->put(obj, *ptmp);
|
||
|
ptmp++;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case FMT_RJUST0:
|
||
|
ptmp = tmp;
|
||
|
if (((*ptmp) == '-') || ((*ptmp) == '+'))
|
||
|
{
|
||
|
obj->put(obj, *ptmp);
|
||
|
ptmp++;
|
||
|
}
|
||
|
|
||
|
for (n = width - tmpwidth; n; n--)
|
||
|
{
|
||
|
obj->put(obj, '0');
|
||
|
}
|
||
|
|
||
|
while (*ptmp)
|
||
|
{
|
||
|
obj->put(obj, *ptmp);
|
||
|
ptmp++;
|
||
|
}
|
||
|
break;
|
||
|
|
||
|
case FMT_LJUST:
|
||
|
for (ptmp = tmp; *ptmp; )
|
||
|
{
|
||
|
obj->put(obj, *ptmp);
|
||
|
ptmp++;
|
||
|
}
|
||
|
|
||
|
for (n = width - tmpwidth; n; n--)
|
||
|
{
|
||
|
obj->put(obj, ' ');
|
||
|
}
|
||
|
break;
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
/* Handle floating point conversions */
|
||
|
|
||
|
else if (strchr("eEfgG", *src))
|
||
|
{
|
||
|
char tmpfmt[40];
|
||
|
const char *psrc;
|
||
|
char *pdst;
|
||
|
double dbl;
|
||
|
|
||
|
/* Reconstruct the floating point format. */
|
||
|
|
||
|
psrc = pfmt;
|
||
|
pdst = tmpfmt;
|
||
|
while (psrc <= src) *pdst++ = *psrc++;
|
||
|
*pdst = 0;
|
||
|
|
||
|
/* Extract the floating point number. */
|
||
|
|
||
|
dbl = va_arg(ap, double);
|
||
|
|
||
|
/* Then let the lib_sprintf do the work. */
|
||
|
|
||
|
if (hasasteriskwidth)
|
||
|
{
|
||
|
if (hasasterisktrunc)
|
||
|
{
|
||
|
lib_sprintf(obj, tmpfmt, width, trunc, dbl);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
lib_sprintf(obj, tmpfmt, width, dbl);
|
||
|
}
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
if (hasasterisktrunc)
|
||
|
{
|
||
|
lib_sprintf(obj, tmpfmt, trunc, dbl);
|
||
|
}
|
||
|
else
|
||
|
{
|
||
|
lib_sprintf(obj, tmpfmt, dbl);
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
}
|
||
|
|
||
|
return obj->nput;
|
||
|
}
|
||
|
|