Mercurial > hg > orthanc-stone
annotate OrthancStone/Sources/Toolbox/GenericToolbox.h @ 1556:8898f8f755c8
typo
author | Sebastien Jodogne <s.jodogne@gmail.com> |
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date | Tue, 18 Aug 2020 11:58:47 +0200 |
parents | 244ad1e4e76a |
children | 5887a4f8594b |
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) 2017-2020 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 <Compatibility.h> |
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24 #include <OrthancException.h> |
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25 |
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26 #include <boost/shared_ptr.hpp> |
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27 |
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28 #include <string> |
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29 #include <stdint.h> |
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30 #include <math.h> |
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31 |
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32 #include <memory> |
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33 |
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34 namespace OrthancStone |
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35 { |
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36 namespace GenericToolbox |
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37 { |
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38 /** |
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39 Fast floating point string validation. |
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40 No trimming applied, so the input must match regex |
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41 /^[-]?[0-9]*\.?[0-9]*([eE][-+]?[0-9]+)?$/ |
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42 The following are allowed as edge cases: "" and "-" |
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43 */ |
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44 inline bool LegitDoubleString(const char* text) |
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45 { |
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46 const char* p = text; |
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47 if(*p == '-') |
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48 p++; |
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49 size_t period = 0; |
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50 while(*p != 0) |
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51 { |
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52 if (*p >= '0' && *p <= '9') |
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53 ++p; |
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54 else if(*p == '.') |
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55 { |
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56 if(period > 0) |
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57 return false; |
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58 else |
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59 period++; |
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60 ++p; |
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61 } |
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62 else if (*p == 'e' || *p == 'E') |
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63 { |
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64 ++p; |
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65 if (*p == '-' || *p == '+') |
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66 ++p; |
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67 // "e+"/"E+" "e-"/"E-" or "e"/"E" must be followed by a number |
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68 if (!(*p >= '0' && *p <= '9')) |
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69 return false; |
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70 |
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71 // these must be the last in the string |
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72 while(*p >= '0' && *p <= '9') |
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73 ++p; |
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74 |
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75 return (*p == 0); |
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76 } |
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77 else |
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78 { |
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79 return false; |
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80 } |
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81 } |
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82 return true; |
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83 } |
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84 |
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85 /** |
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86 Fast integer string validation. |
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87 No trimming applied, so the input must match regex /^-?[0-9]*$/ |
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88 The following are allowed as edge cases: "" and "-" |
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89 */ |
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90 inline bool LegitIntegerString(const char* text) |
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91 { |
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92 const char* p = text; |
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93 if (*p == '-') |
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94 p++; |
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95 while (*p != 0) |
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96 { |
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97 if (*p >= '0' && *p <= '9') |
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98 ++p; |
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99 else |
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100 return false; |
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101 } |
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102 return true; |
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103 } |
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104 |
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105 /* |
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106 Fast string --> double conversion. |
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107 Must pass the LegitDoubleString test |
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108 |
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109 String to doubles with at most 18 digits |
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110 */ |
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111 inline bool StringToDouble(double& r, const char* text) |
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112 { |
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113 if(!LegitDoubleString(text)) |
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114 return false; |
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115 |
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116 static const double FRAC_FACTORS[] = |
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117 { |
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118 1.0, |
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119 0.1, |
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120 0.01, |
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121 0.001, |
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122 0.0001, |
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123 0.00001, |
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124 0.000001, |
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125 0.0000001, |
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126 0.00000001, |
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127 0.000000001, |
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128 0.0000000001, |
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129 0.00000000001, |
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130 0.000000000001, |
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131 0.0000000000001, |
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132 0.00000000000001, |
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133 0.000000000000001, |
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134 0.0000000000000001, |
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135 0.00000000000000001, |
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136 0.000000000000000001, |
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137 0.0000000000000000001 |
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138 }; |
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139 const size_t FRAC_FACTORS_LEN = sizeof(FRAC_FACTORS)/sizeof(double); |
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140 |
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141 r = 0.0; |
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142 double neg = 1.0; |
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143 const char* p = text; |
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144 |
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145 if (*p == '-') |
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146 { |
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147 neg = -1.0; |
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148 ++p; |
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149 } |
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150 // 12345.67890 |
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151 while (*p >= '0' && *p <= '9') |
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152 { |
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153 r = (r*10.0) + (*p - '0'); // 1 12 123 123 12345 |
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154 ++p; |
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155 } |
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156 if (*p == '.') |
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157 { |
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158 double f = 0.0; |
1192 | 159 size_t n = 1; |
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160 ++p; |
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161 while (*p >= '0' && *p <= '9' && n < FRAC_FACTORS_LEN) |
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162 { |
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163 f += (*p - '0') * FRAC_FACTORS[n]; |
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164 ++p; |
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165 ++n; |
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166 } |
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167 r += f; |
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168 } |
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169 r *= neg; |
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170 |
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171 // skip the remaining numbers until we reach not-a-digit (either the |
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172 // end of the string OR the scientific notation symbol) |
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173 while ((*p >= '0' && *p <= '9')) |
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174 ++p; |
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175 |
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176 if (*p == 0 ) |
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177 { |
1080
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178 return true; |
1166
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179 } |
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180 else if ((*p == 'e') || (*p == 'E')) |
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181 { |
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182 // process the scientific notation |
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183 double sign; // no init is safe (read below) |
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184 ++p; |
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185 if (*p == '-') |
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186 { |
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187 sign = -1.0; |
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188 // point to first number |
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189 ++p; |
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190 } |
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191 else if (*p == '+') |
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192 { |
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193 sign = 1.0; |
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194 // point to first number |
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195 ++p; |
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196 } |
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197 else if (*p >= '0' && *p <= '9') |
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198 { |
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199 sign = 1.0; |
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200 } |
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201 else |
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202 { |
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203 // only a sign char or a number is allowed |
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204 return false; |
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205 } |
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206 // now p points to the absolute value of the exponent |
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207 double exp = 0; |
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208 while (*p >= '0' && *p <= '9') |
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209 { |
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210 exp = (exp * 10.0) + static_cast<double>(*p - '0'); // 1 12 123 123 12345 |
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211 ++p; |
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212 } |
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213 // now we have our exponent. put a sign on it. |
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214 exp *= sign; |
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215 double scFac = ::pow(10.0, exp); |
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216 r *= scFac; |
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217 |
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218 // only allowed symbol here is EOS |
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219 return (*p == 0); |
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220 } |
1080
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221 else |
1166
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222 { |
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223 // not allowed |
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224 return false; |
1166
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225 } |
1080
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226 } |
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227 |
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228 inline bool StringToDouble(double& r, const std::string& text) |
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229 { |
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230 return StringToDouble(r, text.c_str()); |
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231 } |
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232 |
1306
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Some docs + headers added to CMake for easier VS browsing + tiny predecl
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233 /** |
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234 Fast string to integer conversion. Leading zeroes and minus are accepted, |
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235 but a leading + sign is NOT. |
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236 Must pass the LegitIntegerString function test. |
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237 In addition, an empty string (or lone minus sign) yields 0. |
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238 */ |
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239 |
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240 template<typename T> |
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241 inline bool StringToInteger(T& r, const char* text) |
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242 { |
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243 if (!LegitIntegerString(text)) |
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244 return false; |
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245 |
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246 r = 0; |
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247 T neg = 1; |
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248 const char* p = text; |
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249 |
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250 if (*p == '-') |
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251 { |
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252 neg = -1; |
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253 ++p; |
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254 } |
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255 while (*p >= '0' && *p <= '9') |
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256 { |
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257 r = (r * 10) + (*p - '0'); // 1 12 123 123 12345 |
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258 ++p; |
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259 } |
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260 r *= neg; |
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261 if (*p == 0) |
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262 return true; |
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263 else |
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264 return false; |
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265 } |
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266 |
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267 template<typename T> |
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268 inline bool StringToInteger(T& r, const std::string& text) |
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269 { |
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270 return StringToInteger<T>(r, text.c_str()); |
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271 } |
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272 |
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273 /** |
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274 if input is "rgb(12,23,255)" --> function fills `red`, `green` and `blue` and returns true |
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275 else ("everything else") --> function returns false and leaves all values untouched |
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276 */ |
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277 bool GetRgbValuesFromString(uint8_t& red, uint8_t& green, uint8_t& blue, const char* text); |
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278 |
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279 /** |
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280 See main overload |
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281 */ |
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282 inline bool GetRgbValuesFromString(uint8_t& red, uint8_t& green, uint8_t& blue, const std::string& text) |
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283 { |
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284 return GetRgbValuesFromString(red, green, blue, text.c_str()); |
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285 } |
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286 |
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287 /** |
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288 Same as GetRgbValuesFromString |
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289 */ |
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290 bool GetRgbaValuesFromString(uint8_t& red, |
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291 uint8_t& green, |
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292 uint8_t& blue, |
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293 uint8_t& alpha, |
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294 const char* text); |
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295 |
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296 /** |
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297 Same as GetRgbValuesFromString |
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298 */ |
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299 inline bool GetRgbaValuesFromString(uint8_t& red, |
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300 uint8_t& green, |
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301 uint8_t& blue, |
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302 uint8_t& alpha, |
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303 const std::string& text) |
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304 { |
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305 return GetRgbaValuesFromString(red, green, blue, alpha, text.c_str()); |
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306 } |
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307 } |
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308 } |