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annotate Framework/Toolbox/GenericToolbox.h @ 1166:f68da12e852b

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Added scientific notation support to StringToDouble
author Benjamin Golinvaux <bgo@osimis.io>
date Wed, 20 Nov 2019 10:47:42 +0100
parents 141593f1aa88
children ba08f2b0a779 91d86144fb79
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /**
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2 * Stone of Orthanc
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3 * Copyright (C) 2012-2016 Sebastien Jodogne, Medical Physics
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4 * Department, University Hospital of Liege, Belgium
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5 * Copyright (C) 2017-2019 Osimis S.A., Belgium
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6 *
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7 * This program is free software: you can redistribute it and/or
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8 * modify it under the terms of the GNU Affero General Public License
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9 * as published by the Free Software Foundation, either version 3 of
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10 * the License, or (at your option) any later version.
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11 *
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12 * This program is distributed in the hope that it will be useful, but
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13 * WITHOUT ANY WARRANTY; without even the implied warranty of
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14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 * Affero General Public License for more details.
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16 *
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17 * You should have received a copy of the GNU Affero General Public License
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18 * along with this program. If not, see <http://www.gnu.org/licenses/>.
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19 **/
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20
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21 #pragma once
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22
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23 #include <string>
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24 #include <stdint.h>
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25 #include <math.h>
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26
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27
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28 namespace OrthancStone
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29 {
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30 namespace GenericToolbox
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31 {
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32 inline bool LegitDoubleString(const char* text)
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33 {
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34 const char* p = text;
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35 if(*p == '-')
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36 p++;
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37 size_t period = 0;
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38 while(*p != 0)
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39 {
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40 if (*p >= '0' && *p <= '9')
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41 ++p;
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42 else if(*p == '.')
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43 {
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44 if(period > 0)
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45 return false;
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46 else
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47 period++;
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48 ++p;
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49 }
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50 else if (*p == 'e' || *p == 'E')
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51 {
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52 ++p;
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53 if (*p == '-' || *p == '+')
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54 ++p;
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55 // "e+"/"E+" "e-"/"E-" or "e"/"E" must be followed by a number
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56 if (!(*p >= '0' && *p <= '9'))
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57 return false;
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58
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59 // these must be the last in the string
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60 while(*p >= '0' && *p <= '9')
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61 ++p;
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62
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63 return (*p == 0);
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64 }
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65 else
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66 {
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67 return false;
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68 }
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69 }
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70 return true;
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71 }
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72
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73 inline bool LegitIntegerString(const char* text)
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74 {
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75 const char* p = text;
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76 if (*p == '-')
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77 p++;
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78 while (*p != 0)
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79 {
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80 if (*p >= '0' && *p <= '9')
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81 ++p;
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82 else
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83 return false;
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84 }
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85 return true;
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86 }
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87
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88 /*
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89 String to doubles with at most 18 digits
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90 */
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91 inline bool StringToDouble(double& r, const char* text)
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92 {
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93 if(!LegitDoubleString(text))
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94 return false;
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95
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96 static const double FRAC_FACTORS[] =
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97 {
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98 1.0,
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99 0.1,
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100 0.01,
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101 0.001,
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102 0.0001,
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103 0.00001,
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104 0.000001,
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105 0.0000001,
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106 0.00000001,
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107 0.000000001,
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108 0.0000000001,
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109 0.00000000001,
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110 0.000000000001,
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111 0.0000000000001,
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112 0.00000000000001,
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113 0.000000000000001,
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114 0.0000000000000001,
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115 0.00000000000000001,
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116 0.000000000000000001,
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117 0.0000000000000000001
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118 };
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119 const size_t FRAC_FACTORS_LEN = sizeof(FRAC_FACTORS)/sizeof(double);
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120
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121 r = 0.0;
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122 double neg = 1.0;
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123 const char* p = text;
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124
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125 if (*p == '-')
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126 {
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127 neg = -1.0;
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128 ++p;
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129 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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130 // 12345.67890
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131 while (*p >= '0' && *p <= '9')
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132 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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133 r = (r*10.0) + (*p - '0'); // 1 12 123 123 12345
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134 ++p;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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parents:
diff changeset
135 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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parents:
diff changeset
136 if (*p == '.')
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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diff changeset
137 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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diff changeset
138 double f = 0.0;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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139 int n = 1;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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diff changeset
140 ++p;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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diff changeset
141 while (*p >= '0' && *p <= '9' && n < FRAC_FACTORS_LEN)
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142 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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diff changeset
143 f += (*p - '0') * FRAC_FACTORS[n];
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144 ++p;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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parents:
diff changeset
145 ++n;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
146 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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147 r += f;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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diff changeset
148 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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diff changeset
149 r *= neg;
1166
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diff changeset
150
f68da12e852b Added scientific notation support to StringToDouble
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parents: 1101
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151 // skip the remaining numbers until we reach not-a-digit (either the
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Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
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152 // end of the string OR the scientific notation symbol)
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153 while ((*p >= '0' && *p <= '9'))
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parents: 1101
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154 ++p;
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parents: 1101
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155
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
diff changeset
156 if (*p == 0 )
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parents: 1101
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157 {
1080
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diff changeset
158 return true;
1166
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
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159 }
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
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160 else if ((*p == 'e') || (*p == 'E'))
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Benjamin Golinvaux <bgo@osimis.io>
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161 {
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162 // process the scientific notation
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163 double sign; // no init is safe (read below)
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164 ++p;
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parents: 1101
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165 if (*p == '-')
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166 {
f68da12e852b Added scientific notation support to StringToDouble
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167 sign = -1.0;
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168 // point to first number
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169 ++p;
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Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
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170 }
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
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171 else if (*p == '+')
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172 {
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173 sign = 1.0;
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174 // point to first number
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175 ++p;
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
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176 }
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
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177 else if (*p >= '0' && *p <= '9')
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178 {
f68da12e852b Added scientific notation support to StringToDouble
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179 sign = 1.0;
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180 }
f68da12e852b Added scientific notation support to StringToDouble
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parents: 1101
diff changeset
181 else
f68da12e852b Added scientific notation support to StringToDouble
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parents: 1101
diff changeset
182 {
f68da12e852b Added scientific notation support to StringToDouble
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183 // only a sign char or a number is allowed
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184 return false;
f68da12e852b Added scientific notation support to StringToDouble
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diff changeset
185 }
f68da12e852b Added scientific notation support to StringToDouble
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186 // now p points to the absolute value of the exponent
f68da12e852b Added scientific notation support to StringToDouble
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187 double exp = 0;
f68da12e852b Added scientific notation support to StringToDouble
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parents: 1101
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188 while (*p >= '0' && *p <= '9')
f68da12e852b Added scientific notation support to StringToDouble
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189 {
f68da12e852b Added scientific notation support to StringToDouble
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190 exp = (exp * 10.0) + static_cast<double>(*p - '0'); // 1 12 123 123 12345
f68da12e852b Added scientific notation support to StringToDouble
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parents: 1101
diff changeset
191 ++p;
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
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diff changeset
192 }
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
diff changeset
193 // now we have our exponent. put a sign on it.
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194 exp *= sign;
f68da12e852b Added scientific notation support to StringToDouble
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parents: 1101
diff changeset
195 double scFac = ::pow(10.0, exp);
f68da12e852b Added scientific notation support to StringToDouble
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parents: 1101
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196 r *= scFac;
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
diff changeset
197
f68da12e852b Added scientific notation support to StringToDouble
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diff changeset
198 // only allowed symbol here is EOS
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199 return (*p == 0);
f68da12e852b Added scientific notation support to StringToDouble
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diff changeset
200 }
1080
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
201 else
1166
f68da12e852b Added scientific notation support to StringToDouble
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parents: 1101
diff changeset
202 {
f68da12e852b Added scientific notation support to StringToDouble
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parents: 1101
diff changeset
203 // not allowed
1080
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
204 return false;
1166
f68da12e852b Added scientific notation support to StringToDouble
Benjamin Golinvaux <bgo@osimis.io>
parents: 1101
diff changeset
205 }
1080
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
206 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
207
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
208 inline bool StringToDouble(double& r, const std::string& text)
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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parents:
diff changeset
209 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
210 return StringToDouble(r, text.c_str());
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
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parents:
diff changeset
211 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
212
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
213 template<typename T>
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
214 inline bool StringToInteger(T& r, const char* text)
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
215 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
216 if (!LegitDoubleString(text))
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
217 return false;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
218
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
219 r = 0;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
220 T neg = 1;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
221 const char* p = text;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
222
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
223 if (*p == '-')
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
224 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
225 neg = -1;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
226 ++p;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
227 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
228 while (*p >= '0' && *p <= '9')
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
229 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
230 r = (r * 10) + (*p - '0'); // 1 12 123 123 12345
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
231 ++p;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
232 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
233 r *= neg;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
234 if (*p == 0)
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
235 return true;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
236 else
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
237 return false;
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
238 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
239
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
240 template<typename T>
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
241 inline bool StringToInteger(T& r, const std::string& text)
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
242 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
243 return StringToInteger<T>(r, text.c_str());
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
244 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
245
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
246 /**
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
247 "rgb(12,23,255)" --> red, green, blue and returns true
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
248 "everything else" --> returns false (other values left untouched)
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
249 */
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
250 bool GetRgbValuesFromString(uint8_t& red, uint8_t& green, uint8_t& blue, const char* text);
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
251
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
252 /**
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
253 See other overload
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
254 */
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
255 inline bool GetRgbValuesFromString(uint8_t& red, uint8_t& green, uint8_t& blue, const std::string& text)
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
256 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
257 return GetRgbValuesFromString(red, green, blue, text.c_str());
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
258 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
259
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
260 bool GetRgbaValuesFromString(uint8_t& red, uint8_t& green, uint8_t& blue, uint8_t& alpha, const char* text);
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
261
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
262 inline bool GetRgbaValuesFromString(uint8_t& red, uint8_t& green, uint8_t& blue, uint8_t& alpha, const std::string& text)
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
263 {
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
264 return GetRgbaValuesFromString(red, green, blue, alpha, text.c_str());
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
265 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
266 }
287ec78f63b4 GenericToolbox (fast c-string --> double or integer) + refactoring to be able
Benjamin Golinvaux <bgo@osimis.io>
parents:
diff changeset
267 }