| /* |
| Copyright (c) 2011 Arduino. All right reserved. |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| This library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
| See the GNU Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| */ |
| |
| #include "itoa.h" |
| #include <string.h> |
| |
| #ifdef __cplusplus |
| extern "C"{ |
| #endif // __cplusplus |
| |
| #if 0 |
| /* reverse: reverse string s in place */ |
| static void reverse( char s[] ) |
| { |
| int i, j ; |
| char c ; |
| |
| for ( i = 0, j = strlen(s)-1 ; i < j ; i++, j-- ) |
| { |
| c = s[i] ; |
| s[i] = s[j] ; |
| s[j] = c ; |
| } |
| } |
| |
| /* itoa: convert n to characters in s */ |
| extern void itoa( int n, char s[] ) |
| { |
| int i, sign ; |
| |
| if ( (sign = n) < 0 ) /* record sign */ |
| { |
| n = -n; /* make n positive */ |
| } |
| |
| i = 0; |
| do |
| { /* generate digits in reverse order */ |
| s[i++] = n % 10 + '0'; /* get next digit */ |
| } while ((n /= 10) > 0) ; /* delete it */ |
| |
| if (sign < 0 ) |
| { |
| s[i++] = '-'; |
| } |
| |
| s[i] = '\0'; |
| |
| reverse( s ) ; |
| } |
| |
| #else |
| |
| extern char* itoa( int value, char *string, int radix ) |
| { |
| return ltoa( value, string, radix ) ; |
| } |
| |
| extern char* ltoa( long value, char *string, int radix ) |
| { |
| char tmp[33]; |
| char *tp = tmp; |
| long i; |
| unsigned long v; |
| int sign; |
| char *sp; |
| |
| if ( string == NULL ) |
| { |
| return 0 ; |
| } |
| |
| if (radix > 36 || radix <= 1) |
| { |
| return 0 ; |
| } |
| |
| sign = (radix == 10 && value < 0); |
| if (sign) |
| { |
| v = -value; |
| } |
| else |
| { |
| v = (unsigned long)value; |
| } |
| |
| while (v || tp == tmp) |
| { |
| i = v % radix; |
| v = v / radix; |
| if (i < 10) |
| *tp++ = i+'0'; |
| else |
| *tp++ = i + 'a' - 10; |
| } |
| |
| sp = string; |
| |
| if (sign) |
| *sp++ = '-'; |
| while (tp > tmp) |
| *sp++ = *--tp; |
| *sp = 0; |
| |
| return string; |
| } |
| |
| extern char* utoa( unsigned long value, char *string, int radix ) |
| { |
| return ultoa( value, string, radix ) ; |
| } |
| |
| extern char* ultoa( unsigned long value, char *string, int radix ) |
| { |
| char tmp[33]; |
| char *tp = tmp; |
| long i; |
| unsigned long v = value; |
| char *sp; |
| |
| if ( string == NULL ) |
| { |
| return 0; |
| } |
| |
| if (radix > 36 || radix <= 1) |
| { |
| return 0; |
| } |
| |
| while (v || tp == tmp) |
| { |
| i = v % radix; |
| v = v / radix; |
| if (i < 10) |
| *tp++ = i+'0'; |
| else |
| *tp++ = i + 'a' - 10; |
| } |
| |
| sp = string; |
| |
| |
| while (tp > tmp) |
| *sp++ = *--tp; |
| *sp = 0; |
| |
| return string; |
| } |
| #endif /* 0 */ |
| |
| #ifdef __cplusplus |
| } // extern "C" |
| #endif // __cplusplus |