strcvt.c revision 199767f8919635c4928607450d9e0abb932109ce
/*-
* Copyright (c) 2006 M. Warner Losh. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
*/
__FBSDID("$FreeBSD$");
/******************************************************************************
*
* Filename: p_string.c
*
* Instantiation of basic string operations to prevent inclusion of full
* string library. These are simple implementations not necessarily optimized
* for speed, but rather to show intent.
*
* Revision information:
*
* 20AUG2004 kb_admin initial creation
* 12JAN2005 kb_admin minor updates
*
* BEGIN_KBDD_BLOCK
* No warranty, expressed or implied, is included with this software. It is
* provided "AS IS" and no warranty of any kind including statutory or aspects
* relating to merchantability or fitness for any purpose is provided. All
* intellectual property rights of others is maintained with the respective
* owners. This software is not copyrighted and is intended for reference
* only.
* END_BLOCK
*****************************************************************************/
#include "lib.h"
/*
* .KB_C_FN_DEFINITION_START
* int p_IsWhiteSpace(char)
* This global function returns true if the character is not considered
* a non-space character.
* .KB_C_FN_DEFINITION_END
*/
int
p_IsWhiteSpace(char cValue)
{
return ((cValue == ' ') ||
(cValue == '\t') ||
(cValue == 0) ||
(cValue == '\r') ||
(cValue == '\n'));
}
/*
* .KB_C_FN_DEFINITION_START
* unsigned p_HexCharValue(char)
* This global function returns the decimal value of the validated hex char.
* .KB_C_FN_DEFINITION_END
*/
unsigned
p_HexCharValue(char cValue)
{
return (cValue - '0');
}
/*
* .KB_C_FN_DEFINITION_START
* unsigned p_ASCIIToHex(char *)
* This global function set the unsigned value equal to the converted
* hex number passed as a string. No error checking is performed; the
* string must be valid hex value, point at the start of string, and be
* NULL-terminated.
* .KB_C_FN_DEFINITION_END
*/
unsigned
p_ASCIIToHex(const char *buf)
{
unsigned lValue = 0;
buf += 2;
while (*buf) {
lValue <<= 4;
}
return (lValue);
}
/*
* .KB_C_FN_DEFINITION_START
* unsigned p_ASCIIToDec(char *)
* This global function set the unsigned value equal to the converted
* decimal number passed as a string. No error checking is performed; the
* string must be valid decimal value, point at the start of string, and be
* NULL-terminated.
* .KB_C_FN_DEFINITION_END
*/
unsigned
p_ASCIIToDec(const char *buf)
{
unsigned v = 0;
while (*buf) {
v *= 10;
v += (*buf++) - '0';
}
return (v);
}