/* noniso.cpp - replacements for non-ISO functions used by Arduino core Copyright © 2016 Ivan Grokhotkov Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. */ #include #include #include #include #include #include "stdlib_noniso.h" void reverse(char* begin, char* end) { char* is = begin; char* ie = end - 1; while (is < ie) { char tmp = *ie; *ie = *is; *is = tmp; ++is; --ie; } } char* utoa(unsigned value, char* result, int base) { if (base < 2 || base > 16) { *result = 0; return result; } char* out = result; unsigned quotient = value; do { const unsigned tmp = quotient / base; *out = "0123456789abcdef"[quotient - (tmp * base)]; ++out; quotient = tmp; } while (quotient); reverse(result, out); *out = 0; return result; } char* itoa(int value, char* result, int base) { if (base < 2 || base > 16) { *result = 0; return result; } unsigned uvalue; char* out = result; // after this point we convert the value to unsigned and go to the utoa // only base10 gets minus sign in the front, adhering to the newlib implementation if ((base == 10) && (value < 0)) { *result++ = '-'; uvalue = (unsigned)-value; } else { uvalue = (unsigned)value; } utoa(uvalue, result, base); return out; } int atoi(const char* s) { return (int)atol(s); } long atol(const char* s) { char* tmp; return strtol(s, &tmp, 10); } double atof(const char* s) { char* tmp; return strtod(s, &tmp); }