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-/*
- * Copyright (c) 2001-2005 The Regents of The University of Michigan
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met: redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer;
- * redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution;
- * neither the name of the copyright holders nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#include <ctype.h>
-
-#include <cstring>
-#include <iostream>
-#include <string>
-#include <vector>
-
-#include "base/intmath.hh"
-#include "base/str.hh"
-
-using namespace std;
-
-bool
-split_first(const string &s, string &lhs, string &rhs, char c)
-{
- string::size_type offset = s.find(c);
- if (offset == string::npos) {
- lhs = s;
- rhs = "";
- return false;
- }
-
- lhs = s.substr(0, offset);
- rhs = s.substr(offset + 1);
- return true;
-}
-
-bool
-split_last(const string &s, string &lhs, string &rhs, char c)
-{
- string::size_type offset = s.rfind(c);
- if (offset == string::npos) {
- lhs = s;
- rhs = "";
- return false;
- }
-
- lhs = s.substr(0, offset);
- rhs = s.substr(offset + 1);
- return true;
-}
-
-void
-tokenize(vector<string>& v, const string &s, char token, bool ignore)
-{
- string::size_type first = 0;
- string::size_type last = s.find_first_of(token);
-
- if (s.empty())
- return;
-
- if (ignore && last == first) {
- while (last == first)
- last = s.find_first_of(token, ++first);
-
- if (last == string::npos) {
- if (first != s.size())
- v.push_back(s.substr(first));
- return;
- }
- }
-
- while (last != string::npos) {
- v.push_back(s.substr(first, last - first));
-
- if (ignore) {
- first = s.find_first_not_of(token, last + 1);
-
- if (first == string::npos)
- return;
- } else
- first = last + 1;
-
- last = s.find_first_of(token, first);
- }
-
- v.push_back(s.substr(first));
-}
-
-/**
- * @todo This function will not handle the smallest negative decimal
- * value for a signed type
- */
-
-template <class T>
-inline bool
-__to_number(string value, T &retval)
-{
- static const T maxnum = ((T)-1);
- static const bool sign = maxnum < 0;
- static const int bits = sizeof(T) * 8;
- static const T hexmax = maxnum & (((T)1 << (bits - 4 - sign)) - 1);
- static const T octmax = maxnum & (((T)1 << (bits - 3 - sign)) - 1);
- static const T signmax =
- (sign) ? maxnum & (((T)1 << (bits - 1)) - 1) : maxnum;
- static const T decmax = signmax / 10;
-
-#if 0
- cout << "maxnum = 0x" << hex << (unsigned long long)maxnum << "\n"
- << "sign = 0x" << hex << (unsigned long long)sign << "\n"
- << "hexmax = 0x" << hex << (unsigned long long)hexmax << "\n"
- << "octmax = 0x" << hex << (unsigned long long)octmax << "\n"
- << "signmax = 0x" << hex << (unsigned long long)signmax << "\n"
- << "decmax = 0x" << hex << (unsigned long long)decmax << "\n";
-#endif
-
- eat_white(value);
-
- bool negative = false;
- bool hex = false;
- bool oct = false;
- int last = value.size() - 1;
- retval = 0;
- int i = 0;
-
- char c = value[i];
- if (!isDec(c)) {
- if (c == '-' && sign)
- negative = true;
- else
- return false;
- }
- else {
- retval += c - '0';
- if (last == 0) return true;
- }
-
- if (c == '0')
- oct = true;
-
- c = value[++i];
- if (oct) {
- if (sign && negative)
- return false;
-
- if (!isOct(c)) {
- if (c == 'X' || c == 'x') {
- hex = true;
- oct = false;
- } else
- return false;
- }
- else
- retval += c - '0';
- } else if (!isDec(c))
- goto multiply;
- else {
- if (sign && negative && c == '0')
- return false;
-
- retval *= 10;
- retval += c - '0';
- if (last == 1) {
- if (sign && negative) retval = -retval;
- return true;
- }
- }
-
- if (hex) {
- if (last == 1)
- return false;
-
- for (i = 2; i <= last ; i++) {
- c = value[i];
- if (!isHex(c))
- return false;
-
- if (retval > hexmax) return false;
- retval *= 16;
- retval += hex2Int(c);
- }
- return true;
- } else if (oct) {
- for (i = 2; i <= last ; i++) {
- c = value[i];
- if (!isOct(c))
- return false;
-
- if (retval > octmax) return false;
- retval *= 8;
- retval += (c - '0');
- }
- return true;
- }
-
- for (i = 2; i < last ; i++) {
- c = value[i];
- if (!isDec(c))
- goto multiply;
-
- if (retval > decmax) return false;
- bool atmax = retval == decmax;
- retval *= 10;
- retval += c - '0';
- if (atmax && retval < decmax) return false;
- if (sign && (retval & ((T)1 << (sizeof(T) * 8 - 1))))
- return false;
- }
-
- c = value[last];
- if (isDec(c)) {
-
- if (retval > decmax) return false;
- bool atmax = retval == decmax;
- retval *= 10;
- retval += c - '0';
- if (atmax && retval < decmax) return false;
- if (sign && negative) {
- if ((retval & ((T)1 << (sizeof(T) * 8 - 1))) &&
- retval >= (T)-signmax)
- return false;
- retval = -retval;
- }
- else
- if (sign && (retval & ((T)1 << ((sizeof(T) * 8) - 1))))
- return false;
- return true;
- }
-
- multiply:
- signed long long mult = 1;
- T val;
- switch (c) {
- case 'k':
- case 'K':
- if (i != last) return false;
- mult = 1024;
- val = signmax / mult;
- break;
- case 'm':
- case 'M':
- if (i != last) return false;
- mult = 1024 * 1024;
- val = signmax / mult;
- break;
- case 'g':
- case 'G':
- if (i != last) return false;
- mult = 1024 * 1024 * 1024;
- val = signmax / mult;
- break;
- case 'e':
- case 'E':
- if (i >= last) return false;
-
- mult = 0;
- for (i++; i <= last; i++) {
- c = value[i];
- if (!isDec(c))
- return false;
-
- mult *= 10;
- mult += c - '0';
- }
-
- for (i = 0; i < mult; i++) {
- if (retval > signmax / 10)
- return false;
- retval *= 10;
- if (sign && (retval & ((T)1 << (sizeof(T) * 8 - 1))))
- return false;
- }
- if (sign && negative) {
- if ((retval & ((T)1 << (sizeof(T) * 8 - 1))) &&
- retval >= (T)-signmax)
- return false;
- retval = -retval;
- }
- else
- if (sign && (retval & ((T)1 << ((sizeof(T) * 8) - 1))))
- return false;
-
- return true;
-
- default:
- return false;
- }
-
- if (sign && negative)
- return false;
-
- if (mult > (unsigned long long)signmax)
- return false;
-
- if (retval > val)
- return false;
-
- retval *= mult;
-
- return true;
-}
-
-#define STN(type) \
-template<> \
-bool to_number<type>(const string &value, type &retval) \
-{ return __to_number(value, retval); }
-
-STN(unsigned long long);
-STN(signed long long);
-STN(unsigned long);
-STN(signed long);
-STN(unsigned int);
-STN(signed int);
-STN(unsigned short);
-STN(signed short);
-STN(unsigned char);
-STN(signed char);
-
-template<>
-bool to_number<bool>(const string &value, bool &retval)
-{
- string lowered = to_lower(value);
-
- if (value == "0") {
- retval = false;
- return true;
- }
-
- if (value == "1"){
- retval = true;
- return true;
- }
-
- if (lowered == "false") {
- retval = false;
- return true;
- }
-
- if (lowered == "true"){
- retval = true;
- return true;
- }
-
- if (lowered == "no") {
- retval = false;
- return true;
- }
-
- if (lowered == "yes"){
- retval = true;
- return true;
- }
-
- return false;
-}
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