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520233f73e
* Test: fixing itoa implementation, clean-up of tests and test runner Update itoa to be the same as newlib, fixing edgecase of abs(INT_MIN) Update WString.cpp:toString() integer conversions to use noniso funcs Remove legacy gcc versions from Makefile and allow overrides Don't fallback to c11 and c++11, source cannot support that * CXX and CC are make predefined values, assuming ?= does not work (?)
104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
/*
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noniso.cpp - replacements for non-ISO functions used by Arduino core
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Copyright © 2016 Ivan Grokhotkov
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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*/
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#include <stdlib.h>
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#include <string.h>
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#include <stdbool.h>
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#include <stdint.h>
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#include <math.h>
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#include "stdlib_noniso.h"
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void reverse(char* begin, char* end)
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{
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char* is = begin;
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char* ie = end - 1;
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while (is < ie)
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{
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char tmp = *ie;
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*ie = *is;
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*is = tmp;
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++is;
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--ie;
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}
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}
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char* utoa(unsigned value, char* result, int base)
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{
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if (base < 2 || base > 16)
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{
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*result = 0;
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return result;
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}
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char* out = result;
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unsigned quotient = value;
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do
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{
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const unsigned tmp = quotient / base;
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*out = "0123456789abcdef"[quotient - (tmp * base)];
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++out;
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quotient = tmp;
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} while (quotient);
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reverse(result, out);
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*out = 0;
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return result;
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}
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char* itoa(int value, char* result, int base)
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{
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if (base < 2 || base > 16)
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{
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*result = 0;
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return result;
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}
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unsigned uvalue;
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char* out = result;
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// after this point we convert the value to unsigned and go to the utoa
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// only base10 gets minus sign in the front, adhering to the newlib implementation
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if ((base == 10) && (value < 0))
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{
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*result++ = '-';
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uvalue = (unsigned)-value;
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}
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else
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{
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uvalue = (unsigned)value;
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}
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utoa(uvalue, result, base);
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return out;
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}
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int atoi(const char* s)
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{
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return (int)atol(s);
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}
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long atol(const char* s)
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{
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char* tmp;
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return strtol(s, &tmp, 10);
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}
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double atof(const char* s)
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{
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char* tmp;
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return strtod(s, &tmp);
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}
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