diff options
Diffstat (limited to 'node/Utils.cpp')
| -rw-r--r-- | node/Utils.cpp | 131 |
1 files changed, 24 insertions, 107 deletions
diff --git a/node/Utils.cpp b/node/Utils.cpp index 9ce1bf05..a69a575e 100644 --- a/node/Utils.cpp +++ b/node/Utils.cpp @@ -1,6 +1,6 @@ /* * ZeroTier One - Network Virtualization Everywhere - * Copyright (C) 2011-2016 ZeroTier, Inc. https://www.zerotier.com/ + * Copyright (C) 2011-2018 ZeroTier, Inc. https://www.zerotier.com/ * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by @@ -14,6 +14,14 @@ * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. + * + * -- + * + * You can be released from the requirements of the license by purchasing + * a commercial license. Buying such a license is mandatory as soon as you + * develop commercial closed-source software that incorporates or links + * directly against ZeroTier software without disclosing the source code + * of your own application. */ #include <stdio.h> @@ -56,80 +64,25 @@ static void _Utils_doBurn(volatile uint8_t *ptr,unsigned int len) static void (*volatile _Utils_doBurn_ptr)(volatile uint8_t *,unsigned int) = _Utils_doBurn; void Utils::burn(void *ptr,unsigned int len) { (_Utils_doBurn_ptr)((volatile uint8_t *)ptr,len); } -std::string Utils::hex(const void *data,unsigned int len) +static unsigned long _Utils_itoa(unsigned long n,char *s) { - std::string r; - r.reserve(len * 2); - for(unsigned int i=0;i<len;++i) { - r.push_back(HEXCHARS[(((const unsigned char *)data)[i] & 0xf0) >> 4]); - r.push_back(HEXCHARS[((const unsigned char *)data)[i] & 0x0f]); - } - return r; + if (n == 0) + return 0; + unsigned long pos = _Utils_itoa(n / 10,s); + if (pos >= 22) // sanity check, should be impossible + pos = 22; + s[pos] = '0' + (char)(n % 10); + return pos + 1; } - -std::string Utils::unhex(const char *hex,unsigned int maxlen) +char *Utils::decimal(unsigned long n,char s[24]) { - int n = 1; - unsigned char c,b = 0; - const char *eof = hex + maxlen; - std::string r; - - if (!maxlen) - return r; - - while ((c = (unsigned char)*(hex++))) { - if ((c >= 48)&&(c <= 57)) { // 0..9 - if ((n ^= 1)) - r.push_back((char)(b | (c - 48))); - else b = (c - 48) << 4; - } else if ((c >= 65)&&(c <= 70)) { // A..F - if ((n ^= 1)) - r.push_back((char)(b | (c - (65 - 10)))); - else b = (c - (65 - 10)) << 4; - } else if ((c >= 97)&&(c <= 102)) { // a..f - if ((n ^= 1)) - r.push_back((char)(b | (c - (97 - 10)))); - else b = (c - (97 - 10)) << 4; - } - if (hex == eof) - break; + if (n == 0) { + s[0] = '0'; + s[1] = (char)0; + return s; } - - return r; -} - -unsigned int Utils::unhex(const char *hex,unsigned int maxlen,void *buf,unsigned int len) -{ - int n = 1; - unsigned char c,b = 0; - unsigned int l = 0; - const char *eof = hex + maxlen; - - if (!maxlen) - return 0; - - while ((c = (unsigned char)*(hex++))) { - if ((c >= 48)&&(c <= 57)) { // 0..9 - if ((n ^= 1)) { - if (l >= len) break; - ((unsigned char *)buf)[l++] = (b | (c - 48)); - } else b = (c - 48) << 4; - } else if ((c >= 65)&&(c <= 70)) { // A..F - if ((n ^= 1)) { - if (l >= len) break; - ((unsigned char *)buf)[l++] = (b | (c - (65 - 10))); - } else b = (c - (65 - 10)) << 4; - } else if ((c >= 97)&&(c <= 102)) { // a..f - if ((n ^= 1)) { - if (l >= len) break; - ((unsigned char *)buf)[l++] = (b | (c - (97 - 10))); - } else b = (c - (97 - 10)) << 4; - } - if (hex == eof) - break; - } - - return l; + s[_Utils_itoa(n,s)] = (char)0; + return s; } void Utils::getSecureRandom(void *buf,unsigned int bytes) @@ -218,40 +171,4 @@ void Utils::getSecureRandom(void *buf,unsigned int bytes) #endif // __WINDOWS__ or not } -bool Utils::scopy(char *dest,unsigned int len,const char *src) -{ - if (!len) - return false; // sanity check - if (!src) { - *dest = (char)0; - return true; - } - char *end = dest + len; - while ((*dest++ = *src++)) { - if (dest == end) { - *(--dest) = (char)0; - return false; - } - } - return true; -} - -unsigned int Utils::snprintf(char *buf,unsigned int len,const char *fmt,...) - throw(std::length_error) -{ - va_list ap; - - va_start(ap,fmt); - int n = (int)vsnprintf(buf,len,fmt,ap); - va_end(ap); - - if ((n >= (int)len)||(n < 0)) { - if (len) - buf[len - 1] = (char)0; - throw std::length_error("buf[] overflow in Utils::snprintf"); - } - - return (unsigned int)n; -} - } // namespace ZeroTier |