366 lines
8.6 KiB
C
366 lines
8.6 KiB
C
/*
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******************************************************************************
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* SOURCE FILE
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*
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* Document no: @(#) $Name: VXWORKS_ITER40_2019102207 $ $RCSfile: ipcom_strto.c,v $ $Revision: 1.3 $
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* $Source: /home/interpeak/CVSRoot/ipcom/port/src/ipcom_strto.c,v $
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* $Author: ulf $ $Date: 2008-10-13 15:05:23 $
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* $State: Exp $ $Locker: $
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*
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* INTERPEAK_COPYRIGHT_STRING
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*
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******************************************************************************
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*/
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/*
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****************************************************************************
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* 1 DESCRIPTION
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****************************************************************************
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*/
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/*
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****************************************************************************
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* 2 CONFIGURATION
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****************************************************************************
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*/
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#include "ipcom_config.h"
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/*
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****************************************************************************
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* 3 INCLUDE FILES
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****************************************************************************
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*/
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#define IPCOM_USE_CLIB_PROTO
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#include "ipcom_clib.h"
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#include "ipcom_sock.h"
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/*
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****************************************************************************
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* 4 EXTERN PROTOTYPES
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****************************************************************************
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*/
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/*
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****************************************************************************
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* 5 DEFINES
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****************************************************************************
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*/
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#define IPCOM_LONG_MAX ((long)(((unsigned long) -1L) >> 1))
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#define IPCOM_LONG_MIN (~IPCOM_LONG_MAX)
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#define IPCOM_ULONG_MAX ((unsigned long)~0UL)
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/*
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****************************************************************************
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* 6 TYPES
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****************************************************************************
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*/
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/*
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****************************************************************************
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* 7 LOCAL PROTOTYPES
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****************************************************************************
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*/
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/*
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****************************************************************************
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* 8 DATA
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****************************************************************************
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*/
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/*
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****************************************************************************
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* 9 LOCAL FUNCTIONS
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****************************************************************************
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*/
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/*
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****************************************************************************
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* 10 PUBLIC FUNCTIONS
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****************************************************************************
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*/
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/*
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*===========================================================================
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* ipcom_strtol
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*===========================================================================
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* Description:
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* Parameters:
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* Returns:
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*
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*/
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#if defined(IPCOM_STRTOL) && IPCOM_STRTOL == 1
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IP_PUBLIC long
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ipcom_strtol(const char *nptr, char **endptr, int base)
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{
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const char *s = nptr;
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unsigned long cutoff;
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unsigned long acc;
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int neg = 0;
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int cutlim;
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int any;
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int c;
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/*
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* Skip white space and pick up leading +/- sign if any.
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* If base is 0, allow 0x for hex and 0 for octal, else
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* assume decimal; if base is already 16, allow 0x.
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*/
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do
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{
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c = *s++;
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}
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while (ipcom_isspace (c));
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if (c == '-')
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{
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neg = 1;
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c = *s++;
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}
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else if (c == '+')
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{
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c = *s++;
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}
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if (((base == 0) || (base == 16)) &&
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(c == '0') &&
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((*s == 'x') || (*s == 'X')))
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{
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c = s[1];
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s += 2;
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base = 16;
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}
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if (base == 0)
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{
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base = (c == '0' ? 8 : 10);
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}
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/*
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* Compute the cutoff value between legal numbers and illegal
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* numbers. That is the largest legal value, divided by the
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* base. An input number that is greater than this value, if
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* followed by a legal input character, is too big. One that
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* is equal to this value may be valid or not; the limit
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* between valid and invalid numbers is then based on the last
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* digit. For instance, if the range for longs is
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* [-2147483648..2147483647] and the input base is 10,
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* cutoff will be set to 214748364 and cutlim to either
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* 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated
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* a value > 214748364, or equal but the next digit is > 7 (or 8),
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* the number is too big, and we will return a range error.
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*
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* Set any if any `digits' consumed; make it negative to indicate
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* overflow.
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*/
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cutoff = (neg ? -(unsigned long)IPCOM_LONG_MIN : IPCOM_LONG_MAX);
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cutlim = cutoff % (unsigned long)base;
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cutoff /= (unsigned long)base;
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for (acc = 0, any = 0;; c = *s++)
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{
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if (ipcom_isdigit (c))
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{
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c -= '0';
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}
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else if (ipcom_isalpha (c))
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{
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c -= (ipcom_isupper(c) ? 'A' - 10 : 'a' - 10);
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}
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else
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{
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break;
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}
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if (c >= base)
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{
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break;
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}
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if ((any < 0) || (acc > cutoff) || ((acc == cutoff) && (c > cutlim)))
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{
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any = -1;
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}
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else
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{
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any = 1;
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acc *= base;
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acc += c;
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}
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}
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if (any < 0)
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{
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acc = (neg ? IPCOM_LONG_MIN : IPCOM_LONG_MAX);
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}
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else if (neg)
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{
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acc = -acc;
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}
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if (endptr != 0)
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{
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*endptr = (char *)(any ? (s - 1) : nptr);
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}
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return acc;
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}
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#endif
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/*
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*===========================================================================
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* ipcom_strtoul
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*===========================================================================
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* Description:
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* Parameters:
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* Returns:
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*
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*/
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#if defined(IPCOM_STRTOUL) && IPCOM_STRTOUL == 1
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IP_PUBLIC unsigned long
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ipcom_strtoul(const char *nptr, char **endptr, int base)
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{
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const char *s = nptr;
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unsigned long cutoff;
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unsigned long acc;
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int neg = 0;
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int cutlim;
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int any;
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int c;
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/*
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* See strtol for comments as to the logic used.
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*/
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do
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{
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c = *s++;
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}
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while (ipcom_isspace (c));
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if (c == '-')
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{
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neg = 1;
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c = *s++;
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}
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else if (c == '+')
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{
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c = *s++;
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}
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if (((base == 0) || (base == 16)) &&
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(c == '0') &&
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((*s == 'x') || (*s == 'X')))
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{
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c = s[1];
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s += 2;
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base = 16;
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}
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if (base == 0)
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{
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base = (c == '0' ? 8 : 10);
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}
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cutoff = (unsigned long)IPCOM_ULONG_MAX / (unsigned long)base;
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cutlim = (unsigned long)IPCOM_ULONG_MAX % (unsigned long)base;
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for (acc = 0, any = 0;; c = *s++)
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{
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if (ipcom_isdigit (c))
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{
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c -= '0';
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}
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else if (ipcom_isalpha (c))
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{
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c -= (ipcom_isupper (c) ? 'A' - 10 : 'a' - 10);
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}
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else
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{
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break;
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}
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if (c >= base)
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{
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break;
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}
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if ((any < 0) || (acc > cutoff) || ((acc == cutoff) && (c > cutlim)))
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{
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any = -1;
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}
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else
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{
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any = 1;
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acc *= base;
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acc += c;
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}
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}
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if (any < 0)
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{
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acc = IPCOM_ULONG_MAX;
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}
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else if (neg)
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{
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acc = -acc;
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}
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if (endptr != 0)
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{
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*endptr = (char *)(any ? (s - 1) : nptr);
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}
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return acc;
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}
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#endif
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/*
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*===========================================================================
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* ipcom_atoi
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*===========================================================================
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* Description:
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* Parameters:
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* Returns:
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*
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*/
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#if defined(IPCOM_ATOI) && IPCOM_ATOI == 1
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IP_PUBLIC int
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ipcom_atoi(const char *s)
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{
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return (int)ipcom_strtol (s, IP_NULL, 10);
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}
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#endif
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/*
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*===========================================================================
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* ipcom_atol
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*===========================================================================
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* Description:
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* Parameters:
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* Returns:
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*
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*/
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#if defined(IPCOM_ATOL) && IPCOM_ATOL == 1
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IP_PUBLIC long
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ipcom_atol(const char *s)
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{
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return ipcom_strtol (s, IP_NULL, 10);
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}
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#endif
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/*
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****************************************************************************
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* END OF FILE
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****************************************************************************
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*/
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