| 1 | /* $Id: kHlpInt2Ascii.c 2 2007-11-16 16:07:14Z bird $ */
|
|---|
| 2 | /** @file
|
|---|
| 3 | * kHlpString - kHlpInt2Ascii.
|
|---|
| 4 | */
|
|---|
| 5 |
|
|---|
| 6 | /*
|
|---|
| 7 | * Copyright (c) 2006-2007 knut st. osmundsen <[email protected]>
|
|---|
| 8 | *
|
|---|
| 9 | * This file is part of kStuff.
|
|---|
| 10 | *
|
|---|
| 11 | * kStuff is free software; you can redistribute it and/or
|
|---|
| 12 | * modify it under the terms of the GNU Lesser General Public
|
|---|
| 13 | * License as published by the Free Software Foundation; either
|
|---|
| 14 | * version 2.1 of the License, or (at your option) any later version.
|
|---|
| 15 | *
|
|---|
| 16 | * In addition to the permissions in the GNU Lesser General Public
|
|---|
| 17 | * License, you are granted unlimited permission to link the compiled
|
|---|
| 18 | * version of this file into combinations with other programs, and to
|
|---|
| 19 | * distribute those combinations without any restriction coming from
|
|---|
| 20 | * the use of this file.
|
|---|
| 21 | *
|
|---|
| 22 | * kStuff is distributed in the hope that it will be useful,
|
|---|
| 23 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 24 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 25 | * Lesser General Public License for more details.
|
|---|
| 26 | *
|
|---|
| 27 | * You should have received a copy of the GNU Lesser General Public
|
|---|
| 28 | * License along with kStuff; if not, write to the Free Software
|
|---|
| 29 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
|---|
| 30 | * 02110-1301, USA
|
|---|
| 31 | */
|
|---|
| 32 |
|
|---|
| 33 | /*******************************************************************************
|
|---|
| 34 | * Header Files *
|
|---|
| 35 | *******************************************************************************/
|
|---|
| 36 | #include <k/kHlpString.h>
|
|---|
| 37 |
|
|---|
| 38 |
|
|---|
| 39 | /**
|
|---|
| 40 | * Converts an signed integer to an ascii string.
|
|---|
| 41 | *
|
|---|
| 42 | * @returns psz.
|
|---|
| 43 | * @param psz Pointer to the output buffer.
|
|---|
| 44 | * @param cch The size of the output buffer.
|
|---|
| 45 | * @param lVal The value.
|
|---|
| 46 | * @param iBase The base to format it. (2,8,10 or 16)
|
|---|
| 47 | */
|
|---|
| 48 | KHLP_DECL(char *) kHlpInt2Ascii(char *psz, KSIZE cch, long lVal, unsigned iBase)
|
|---|
| 49 | {
|
|---|
| 50 | static const char s_szDigits[] = "0123456789abcdefghijklmnopqrstuvwxyz";
|
|---|
| 51 | char *pszRet = psz;
|
|---|
| 52 |
|
|---|
| 53 | if (cch >= (lVal < 0 ? 3U : 2U) && psz)
|
|---|
| 54 | {
|
|---|
| 55 | /* prefix */
|
|---|
| 56 | if (lVal < 0)
|
|---|
| 57 | {
|
|---|
| 58 | *psz++ = '-';
|
|---|
| 59 | cch--;
|
|---|
| 60 | lVal = -lVal;
|
|---|
| 61 | }
|
|---|
| 62 |
|
|---|
| 63 | /* the digits */
|
|---|
| 64 | do
|
|---|
| 65 | {
|
|---|
| 66 | *psz++ = s_szDigits[lVal % iBase];
|
|---|
| 67 | cch--;
|
|---|
| 68 | lVal /= iBase;
|
|---|
| 69 | } while (lVal && cch > 1);
|
|---|
| 70 |
|
|---|
| 71 | /* overflow indicator */
|
|---|
| 72 | if (lVal)
|
|---|
| 73 | psz[-1] = '+';
|
|---|
| 74 | }
|
|---|
| 75 | else if (!pszRet)
|
|---|
| 76 | return pszRet;
|
|---|
| 77 | else if (cch < 1 || !pszRet)
|
|---|
| 78 | return pszRet;
|
|---|
| 79 | else
|
|---|
| 80 | *psz++ = '+';
|
|---|
| 81 | *psz = '\0';
|
|---|
| 82 |
|
|---|
| 83 | return pszRet;
|
|---|
| 84 | }
|
|---|
| 85 |
|
|---|
