112 lines
2.0 KiB
C
112 lines
2.0 KiB
C
/*
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Copyright (c) 2014 Arduino LLC. All right reserved.
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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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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.
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See the GNU Lesser General Public License for more details.
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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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#include <string.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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char *ltoa(long value, char *string, int radix) {
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char tmp[33];
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char *tp = tmp;
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long i;
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unsigned long v;
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int sign;
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char *sp;
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if (string == NULL) {
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return 0;
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}
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if (radix > 36 || radix <= 1) {
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return 0;
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}
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sign = (radix == 10 && value < 0);
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if (sign) {
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v = -value;
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} else {
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v = (unsigned long)value;
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}
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while (v || tp == tmp) {
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i = v % radix;
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v = v / radix;
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if (i < 10)
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*tp++ = i + '0';
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else
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*tp++ = i + 'a' - 10;
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}
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sp = string;
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if (sign)
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*sp++ = '-';
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while (tp > tmp)
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*sp++ = *--tp;
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*sp = 0;
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return string;
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}
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char *ultoa(unsigned long value, char *string, int radix) {
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char tmp[33];
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char *tp = tmp;
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long i;
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unsigned long v = value;
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char *sp;
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if (string == NULL) {
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return 0;
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}
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if (radix > 36 || radix <= 1) {
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return 0;
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}
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while (v || tp == tmp) {
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i = v % radix;
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v = v / radix;
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if (i < 10)
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*tp++ = i + '0';
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else
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*tp++ = i + 'a' - 10;
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}
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sp = string;
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while (tp > tmp)
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*sp++ = *--tp;
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*sp = 0;
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return string;
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}
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char *itoa(int value, char *string, int radix) {
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return ltoa(value, string, radix);
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}
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char *utoa(unsigned int value, char *string, int radix) {
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return ultoa(value, string, radix);
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}
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#ifdef __cplusplus
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} // extern "C"
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#endif
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