├── test └── decodequery.c ├── example └── main.c ├── source ├── decodequery.h └── decodequery.c ├── README.md └── LICENSE /test/decodequery.c: -------------------------------------------------------------------------------- 1 | /** 2 | * 3 | * @Name : DecodeQueryTest.c 4 | * @Version : 1.0 5 | * @Programmer : Max 6 | * @Date : 2019-03-09 7 | * @Released under : https://github.com/BaseMax/DecodeQueryStringC/blob/master/LICENSE 8 | * @Repository : https://github.com/BaseMax/DecodeQueryStringC 9 | * 10 | **/ 11 | #include 12 | #include 13 | #include 14 | #include 15 | #include "../source/decodequery.h" 16 | #define DEBUG 1 17 | char *execute(const char *input) { 18 | char *temp=malloc(sizeof(char)*200); 19 | strcpy(temp,input); 20 | decodeUrl(temp,temp); 21 | #if DEBUG 22 | printf("Check> %s\n",temp); 23 | #endif 24 | return temp; 25 | } 26 | int main() { 27 | assert(strcmp(execute("a+b"),"a b") == 0); 28 | assert(strcmp(execute("a+ b"),"a b") == 0); 29 | assert(strcmp(execute("a+%20b "),"a b ") == 0); 30 | return 0; 31 | } 32 | -------------------------------------------------------------------------------- /example/main.c: -------------------------------------------------------------------------------- 1 | /** 2 | * 3 | * @Name : Example.c 4 | * @Version : 1.0 5 | * @Programmer : Max 6 | * @Date : 2019-03-08, 2019-03-09 7 | * @Released under : https://github.com/BaseMax/DecodeQueryStringC/blob/master/LICENSE 8 | * @Repository : https://github.com/BaseMax/DecodeQueryStringC 9 | * 10 | **/ 11 | #include 12 | #include 13 | #include "../source/decodequery.h" 14 | 15 | int main() { 16 | char *value=malloc(sizeof(char)*107*2); 17 | strcpy(value,"%D8%B3%D9%84%D8%A7%D9%85"); 18 | printf("Input: %s\n",value); 19 | decodeUrl(value,value); 20 | // decodeHtmlEntities(value,value); 21 | printf("Output: %s\n",value); 22 | 23 | printf("\n"); 24 | 25 | strcpy(value,"HELLO%2C+%26%231587%3B%26%231604%3B%26%231575%3B%26%231605%3B+%2C+%26%231777%3B%26%231778%3B%26%231779%3B"); 26 | printf("Input: %s\n",value); 27 | decodeUrl(value,value); 28 | decodeHtmlEntities(value,value); 29 | printf("Output: %s\n",value); 30 | 31 | return 0; 32 | } 33 | -------------------------------------------------------------------------------- /source/decodequery.h: -------------------------------------------------------------------------------- 1 | /** 2 | * 3 | * @Name : DecodeQuery.h 4 | * @Version : 1.0 5 | * @Programmer : Max 6 | * @Date : 2019-03-08 7 | * @Released under : https://github.com/BaseMax/DecodeQueryStringC/blob/master/LICENSE 8 | * @Repository : https://github.com/BaseMax/DecodeQueryStringC 9 | * 10 | **/ 11 | #ifndef DECODE_QUERY 12 | #define DECODE_QUERY 13 | 14 | #include //errno 15 | #include //printf,memcpy,memmove 16 | #include //malloc,bsearch 17 | #include //strcpy,strchr,strtoul,strncmp,strlen 18 | #include //isxdigit 19 | 20 | void decodeUrl(char *destination,const char *source); 21 | size_t decodeHtmlEntities(char *destination,const char *source); 22 | // char *urlDecode(const char *str); 23 | // static inline char toUpper(char c); 24 | static int parseEntity(const char *current,char **to,const char **from); 25 | static size_t putUtf8Char(unsigned long value,char *buffer); 26 | static const char *getNamedEntity(const char *name); 27 | static int stringCompareLength(const void *key,const void *value); 28 | 29 | #endif 30 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Decode Query String Using C 2 | 3 | A tiny library for decode value of the query string using c with utf8 support and html entities. 4 | 5 | # Using 6 | 7 | ```c 8 | decodeUrl(destination,source); 9 | decodeHtmlEntities(destination,source); 10 | ``` 11 | 12 | ### Functions 13 | 14 | ```c 15 | void decodeUrl(char *destination,const char *source); 16 | size_t decodeHtmlEntities(char *destination,const char *source); 17 | // char *urlDecode(const char *str); 18 | // static inline char toUpper(char c); 19 | static int parseEntity(const char *current,char **to,const char **from); 20 | static size_t putUtf8Char(unsigned long value,char *buffer); 21 | static const char *getNamedEntity(const char *name); 22 | static int stringCompare(const void *key,const void *value); 23 | ``` 24 | 25 | ### Global Variable 26 | 27 | ```c 28 | // const char asciiHex[23] = {...}; 29 | static const char *const NamedEntities[][2] = {...}; 30 | ``` 31 | 32 | ### Includes 33 | 34 | ```c 35 | #include 36 | #include 37 | #include 38 | #include 39 | #include 40 | ``` 41 | 42 | ## Example I/O 43 | 44 | ``` 45 | Input: %D8%B3%D9%84%D8%A7%D9%85 46 | Output: سلام 47 | 48 | Input: HELLO%2C+%26%231587%3B%26%231604%3B%26%231575%3B%26%231605%3B+%2C+%26%231777%3B%26%231778%3B%26%231779%3B 49 | Output: HELLO, سلام , ۱۲۳ 50 | ``` 51 | 52 | 53 | ## Compile Example 54 | 55 | ``` 56 | $ git clone https://github.com/BaseMax/DecodeQueryStringC 57 | $ cd DecodeQueryStringC/ 58 | $ cd example/ 59 | $ gcc main.c ../source/decodequery.c -o main 60 | $ ./main 61 | ``` 62 | 63 | ## Copyright 64 | 65 | Many resources have been used to implement this library. (Eg NamedEntities, ...) 66 | 67 | Also, some of the code has been follow from certain libraries. 68 | 69 | So, if you use this complete library, keep the author's name. 70 | 71 | In addition, parts of the code have also been optimized. 72 | If you have any suggestions for improvement or correction, you can submit. 73 | 74 | Thank You. 75 | -------------------------------------------------------------------------------- /source/decodequery.c: -------------------------------------------------------------------------------- 1 | /** 2 | * 3 | * @Name : DecodeQuery.c 4 | * @Version : 1.0 5 | * @Programmer : Max 6 | * @Date : 2019-03-08 7 | * @Released under : https://github.com/BaseMax/DecodeQueryStringC/blob/master/LICENSE 8 | * @Repository : https://github.com/BaseMax/DecodeQueryStringC 9 | * 10 | **/ 11 | #include "decodequery.h" 12 | 13 | static const char *const NamedEntities[][2] = { 14 | { "AElig;","Æ" }, 15 | { "Aacute;","Á" }, 16 | { "Acirc;","Â" }, 17 | { "Agrave;","À" }, 18 | { "Alpha;","Α" }, 19 | { "Aring;","Å" }, 20 | { "Atilde;","Ã" }, 21 | { "Auml;","Ä" }, 22 | { "Beta;","Β" }, 23 | { "Ccedil;","Ç" }, 24 | { "Chi;","Χ" }, 25 | { "Dagger;","‡" }, 26 | { "Delta;","Δ" }, 27 | { "ETH;","Ð" }, 28 | { "Eacute;","É" }, 29 | { "Ecirc;","Ê" }, 30 | { "Egrave;","È" }, 31 | { "Epsilon;","Ε" }, 32 | { "Eta;","Η" }, 33 | { "Euml;","Ë" }, 34 | { "Gamma;","Γ" }, 35 | { "Iacute;","Í" }, 36 | { "Icirc;","Î" }, 37 | { "Igrave;","Ì" }, 38 | { "Iota;","Ι" }, 39 | { "Iuml;","Ï" }, 40 | { "Kappa;","Κ" }, 41 | { "Lambda;","Λ" }, 42 | { "Mu;","Μ" }, 43 | { "Ntilde;","Ñ" }, 44 | { "Nu;","Ν" }, 45 | { "OElig;","Œ" }, 46 | { "Oacute;","Ó" }, 47 | { "Ocirc;","Ô" }, 48 | { "Ograve;","Ò" }, 49 | { "Omega;","Ω" }, 50 | { "Omicron;","Ο" }, 51 | { "Oslash;","Ø" }, 52 | { "Otilde;","Õ" }, 53 | { "Ouml;","Ö" }, 54 | { "Phi;","Φ" }, 55 | { "Pi;","Π" }, 56 | { "Prime;","″" }, 57 | { "Psi;","Ψ" }, 58 | { "Rho;","Ρ" }, 59 | { "Scaron;","Š" }, 60 | { "Sigma;","Σ" }, 61 | { "THORN;","Þ" }, 62 | { "Tau;","Τ" }, 63 | { "Theta;","Θ" }, 64 | { "Uacute;","Ú" }, 65 | { "Ucirc;","Û" }, 66 | { "Ugrave;","Ù" }, 67 | { "Upsilon;","Υ" }, 68 | { "Uuml;","Ü" }, 69 | { "Xi;","Ξ" }, 70 | { "Yacute;","Ý" }, 71 | { "Yuml;","Ÿ" }, 72 | { "Zeta;","Ζ" }, 73 | { "aacute;","á" }, 74 | { "acirc;","â" }, 75 | { "acute;","´" }, 76 | { "aelig;","æ" }, 77 | { "agrave;","à" }, 78 | { "alefsym;","ℵ" }, 79 | { "alpha;","α" }, 80 | { "amp;","&" }, 81 | { "and;","∧" }, 82 | { "ang;","∠" }, 83 | { "apos;","'" }, 84 | { "aring;","å" }, 85 | { "asymp;","≈" }, 86 | { "atilde;","ã" }, 87 | { "auml;","ä" }, 88 | { "bdquo;","„" }, 89 | { "beta;","β" }, 90 | { "brvbar;","¦" }, 91 | { "bull;","•" }, 92 | { "cap;","∩" }, 93 | { "ccedil;","ç" }, 94 | { "cedil;","¸" }, 95 | { "cent;","¢" }, 96 | { "chi;","χ" }, 97 | { "circ;","ˆ" }, 98 | { "clubs;","♣" }, 99 | { "cong;","≅" }, 100 | { "copy;","©" }, 101 | { "crarr;","↵" }, 102 | { "cup;","∪" }, 103 | { "curren;","¤" }, 104 | { "dArr;","⇓" }, 105 | { "dagger;","†" }, 106 | { "darr;","↓" }, 107 | { "deg;","°" }, 108 | { "delta;","δ" }, 109 | { "diams;","♦" }, 110 | { "divide;","÷" }, 111 | { "eacute;","é" }, 112 | { "ecirc;","ê" }, 113 | { "egrave;","è" }, 114 | { "empty;","∅" }, 115 | { "emsp;","\xE2\x80\x83" }, 116 | { "ensp;","\xE2\x80\x82" }, 117 | { "epsilon;","ε" }, 118 | { "equiv;","≡" }, 119 | { "eta;","η" }, 120 | { "eth;","ð" }, 121 | { "euml;","ë" }, 122 | { "euro;","€" }, 123 | { "exist;","∃" }, 124 | { "fnof;","ƒ" }, 125 | { "forall;","∀" }, 126 | { "frac12;","½" }, 127 | { "frac14;","¼" }, 128 | { "frac34;","¾" }, 129 | { "frasl;","⁄" }, 130 | { "gamma;","γ" }, 131 | { "ge;","≥" }, 132 | { "gt;",">" }, 133 | { "hArr;","⇔" }, 134 | { "harr;","↔" }, 135 | { "hearts;","♥" }, 136 | { "hellip;","…" }, 137 | { "iacute;","í" }, 138 | { "icirc;","î" }, 139 | { "iexcl;","¡" }, 140 | { "igrave;","ì" }, 141 | { "image;","ℑ" }, 142 | { "infin;","∞" }, 143 | { "int;","∫" }, 144 | { "iota;","ι" }, 145 | { "iquest;","¿" }, 146 | { "isin;","∈" }, 147 | { "iuml;","ï" }, 148 | { "kappa;","κ" }, 149 | { "lArr;","⇐" }, 150 | { "lambda;","λ" }, 151 | { "lang;","〈" }, 152 | { "laquo;","«" }, 153 | { "larr;","←" }, 154 | { "lceil;","⌈" }, 155 | { "ldquo;","“" }, 156 | { "le;","≤" }, 157 | { "lfloor;","⌊" }, 158 | { "lowast;","∗" }, 159 | { "loz;","◊" }, 160 | { "lrm;","\xE2\x80\x8E" }, 161 | { "lsaquo;","‹" }, 162 | { "lsquo;","‘" }, 163 | { "lt;","<" }, 164 | { "macr;","¯" }, 165 | { "mdash;","—" }, 166 | { "micro;","µ" }, 167 | { "middot;","·" }, 168 | { "minus;","−" }, 169 | { "mu;","μ" }, 170 | { "nabla;","∇" }, 171 | { "nbsp;","\xC2\xA0" }, 172 | { "ndash;","–" }, 173 | { "ne;","≠" }, 174 | { "ni;","∋" }, 175 | { "not;","¬" }, 176 | { "notin;","∉" }, 177 | { "nsub;","⊄" }, 178 | { "ntilde;","ñ" }, 179 | { "nu;","ν" }, 180 | { "oacute;","ó" }, 181 | { "ocirc;","ô" }, 182 | { "oelig;","œ" }, 183 | { "ograve;","ò" }, 184 | { "oline;","‾" }, 185 | { "omega;","ω" }, 186 | { "omicron;","ο" }, 187 | { "oplus;","⊕" }, 188 | { "or;","∨" }, 189 | { "ordf;","ª" }, 190 | { "ordm;","º" }, 191 | { "oslash;","ø" }, 192 | { "otilde;","õ" }, 193 | { "otimes;","⊗" }, 194 | { "ouml;","ö" }, 195 | { "para;","¶" }, 196 | { "part;","∂" }, 197 | { "permil;","‰" }, 198 | { "perp;","⊥" }, 199 | { "phi;","φ" }, 200 | { "pi;","π" }, 201 | { "piv;","ϖ" }, 202 | { "plusmn;","±" }, 203 | { "pound;","£" }, 204 | { "prime;","′" }, 205 | { "prod;","∏" }, 206 | { "prop;","∝" }, 207 | { "psi;","ψ" }, 208 | { "quot;","\"" }, 209 | { "rArr;","⇒" }, 210 | { "radic;","√" }, 211 | { "rang;","〉" }, 212 | { "raquo;","»" }, 213 | { "rarr;","→" }, 214 | { "rceil;","⌉" }, 215 | { "rdquo;","”" }, 216 | { "real;","ℜ" }, 217 | { "reg;","®" }, 218 | { "rfloor;","⌋" }, 219 | { "rho;","ρ" }, 220 | { "rlm;","\xE2\x80\x8F" }, 221 | { "rsaquo;","›" }, 222 | { "rsquo;","’" }, 223 | { "sbquo;","‚" }, 224 | { "scaron;","š" }, 225 | { "sdot;","⋅" }, 226 | { "sect;","§" }, 227 | { "shy;","\xC2\xAD" }, 228 | { "sigma;","σ" }, 229 | { "sigmaf;","ς" }, 230 | { "sim;","∼" }, 231 | { "spades;","♠" }, 232 | { "sub;","⊂" }, 233 | { "sube;","⊆" }, 234 | { "sum;","∑" }, 235 | { "sup1;","¹" }, 236 | { "sup2;","²" }, 237 | { "sup3;","³" }, 238 | { "sup;","⊃" }, 239 | { "supe;","⊇" }, 240 | { "szlig;","ß" }, 241 | { "tau;","τ" }, 242 | { "there4;","∴" }, 243 | { "theta;","θ" }, 244 | { "thetasym;","ϑ" }, 245 | { "thinsp;","\xE2\x80\x89" }, 246 | { "thorn;","þ" }, 247 | { "tilde;","˜" }, 248 | { "times;","×" }, 249 | { "trade;","™" }, 250 | { "uArr;","⇑" }, 251 | { "uacute;","ú" }, 252 | { "uarr;","↑" }, 253 | { "ucirc;","û" }, 254 | { "ugrave;","ù" }, 255 | { "uml;","¨" }, 256 | { "upsih;","ϒ" }, 257 | { "upsilon;","υ" }, 258 | { "uuml;","ü" }, 259 | { "weierp;","℘" }, 260 | { "xi;","ξ" }, 261 | { "yacute;","ý" }, 262 | { "yen;","¥" }, 263 | { "yuml;","ÿ" }, 264 | { "zeta;","ζ" }, 265 | { "zwj;","\xE2\x80\x8D" }, 266 | { "zwnj;","\xE2\x80\x8C" } 267 | }; 268 | 269 | static int stringCompare(const void *key,const void *value) { 270 | return strncmp( 271 | (const char *) key, 272 | *(const char *const *) value, 273 | strlen(*(const char *const *)value) 274 | ); 275 | } 276 | 277 | static const char *getNamedEntity(const char *name) { 278 | const char *const *entity = (const char *const *) 279 | bsearch( 280 | name, 281 | NamedEntities,sizeof NamedEntities / sizeof *NamedEntities, 282 | sizeof *NamedEntities,stringCompare 283 | ); 284 | return entity ? entity[1] : NULL; 285 | } 286 | 287 | static size_t putUtf8Char(unsigned long value,char *buffer) { 288 | unsigned char *bytes = (unsigned char *) buffer; 289 | if(value <= 0x007Ful) { 290 | bytes[0] = (unsigned char) value; 291 | return 1; 292 | } 293 | if(value <= 0x07FFul) { 294 | bytes[1] = (unsigned char) 295 | ( 296 | (2 << 6) | 297 | (value & 0x3F) 298 | ); 299 | bytes[0] = (unsigned char) 300 | ( 301 | (6 << 5) | 302 | (value >> 6) 303 | ); 304 | return 2; 305 | } 306 | if(value <= 0xFFFFul) { 307 | bytes[2] = (unsigned char) 308 | ( 309 | (2 << 6) | 310 | (value & 0x3F) 311 | ); 312 | bytes[1] = (unsigned char) 313 | ( 314 | (2 << 6) | 315 | ((value >> 6) & 0x3F) 316 | ); 317 | bytes[0] = (unsigned char) 318 | ( 319 | (14 << 4) | 320 | (value >> 12) 321 | ); 322 | return 3; 323 | } 324 | if(value <= 0x10FFFFul) { 325 | bytes[3] = (unsigned char) 326 | ( 327 | (2 << 6) | 328 | (value & 0x3F) 329 | ); 330 | bytes[2] = (unsigned char) 331 | ( 332 | (2 << 6) | 333 | ((value >> 6) & 0x3F) 334 | ); 335 | bytes[1] = (unsigned char) 336 | ( 337 | (2 << 6) | 338 | ((value >> 12) & 0x3F) 339 | ); 340 | bytes[0] = (unsigned char) 341 | ( 342 | (30 << 3) | 343 | (value >> 18) 344 | ); 345 | return 4; 346 | } 347 | return 0; 348 | } 349 | 350 | static int parseEntity(const char *current,char **to,const char **from) { 351 | const char *end = strchr(current,59); 352 | if(!end) { 353 | return 0; 354 | } 355 | if(current[1] == 35) { 356 | char *tail = NULL; 357 | int errno_save = errno; 358 | int hex = current[2] == 120 || current[2] == 88; 359 | errno = 0; 360 | unsigned long cp = strtoul(current + (hex ? 3 : 2),&tail,hex ? 16 : 10); 361 | int fail = errno || 362 | tail != end || 363 | cp > 0x10FFFFul; 364 | errno = errno_save; 365 | if(fail) return 0; 366 | *to += putUtf8Char(cp,*to); 367 | *from = end + 1; 368 | return 1; 369 | } 370 | else { 371 | const char *entity = getNamedEntity(¤t[1]); 372 | if(!entity) { 373 | return 0; 374 | } 375 | size_t len = strlen(entity); 376 | memcpy(*to,entity,len); 377 | *to += len; 378 | *from = end + 1; 379 | return 1; 380 | } 381 | } 382 | 383 | // 4bit 384 | // const char asciiHex[23] = { 385 | // 0, 386 | // 1, 387 | // 2, 388 | // 3, 389 | // 4, 390 | // 5, 391 | // 6, 392 | // 7, 393 | // 8, 394 | // 9, 395 | // 0, 396 | // 0, 397 | // 0, 398 | // 0, 399 | // 0, 400 | // 0, 401 | // 0, 402 | // 10, 403 | // 11, 404 | // 12, 405 | // 13, 406 | // 14, 407 | // 15 408 | // }; 409 | 410 | // static inline char toUpper(char c) { 411 | // if((c >= 97) && (c <= 122)) {//a,z 412 | // return c ^ 0x20;//fast way 413 | // } 414 | // return c; 415 | // } 416 | 417 | // char *urlDecode(const char *str) { 418 | // size_t i,j,len = strlen(str); 419 | // char c,d,url_hex; 420 | // char *decoded = malloc(len + 1); 421 | // if(decoded == NULL) { 422 | // return NULL; 423 | // } 424 | // i = 0; 425 | // j = 0; 426 | // do { 427 | // c = str[i]; 428 | // d = 0; 429 | // if(c == 37) { 430 | // url_hex = toUpper(str[++i]); 431 | // if( 432 | // ( 433 | // (url_hex >= 48) && 434 | // (url_hex <= 57)) || 435 | // ((url_hex >= 65) && (url_hex <= 70)) 436 | // ) { 437 | // d = asciiHex[url_hex - 48] << 4; 438 | // url_hex = toUpper(str[++i]); 439 | // if( 440 | // ( 441 | // (url_hex >= 48) && 442 | // (url_hex <= 57) 443 | // ) || 444 | // ( 445 | // (url_hex >= 65) && 446 | // (url_hex <= 70) 447 | // ) 448 | // ) { 449 | // d |= asciiHex[url_hex - 48]; 450 | // } 451 | // else { 452 | // d = 0; 453 | // } 454 | // } 455 | // } 456 | // else if(c == 43) { 457 | // d = 32; 458 | // } 459 | // else if( 460 | // (c == 42) || 461 | // (c == 45) || 462 | // (c == 46) || 463 | // ((c >= 48) && (c <= 57)) || 464 | // ((c >= 65) && (c <= 90)) || 465 | // (c == 95) || 466 | // ((c >= 97) && (c <= 122)) 467 | // ) { 468 | // d = c; 469 | // } 470 | // decoded[j++] = d; 471 | // ++i; 472 | // } 473 | // while((i < len) && (d != 0)); 474 | // decoded[j] = 0; 475 | // return decoded; 476 | // } 477 | 478 | size_t decodeHtmlEntities(char *destination,const char *source) { 479 | if(!source) { 480 | source = destination; 481 | } 482 | char *to = destination; 483 | const char *from = source; 484 | for(const char *current;(current = strchr(from,38));) {//& 485 | memmove(to,from,(size_t)(current - from)); 486 | to += current - from; 487 | if(parseEntity(current,&to,&from)) { 488 | continue; 489 | } 490 | from = current; 491 | *to++ = *from++; 492 | } 493 | size_t remaining = strlen(from); 494 | memmove(to,from,remaining); 495 | to += remaining; 496 | *to = 0; 497 | return (size_t)(to - destination); 498 | } 499 | 500 | void decodeUrl(char *destination,const char *source) { 501 | char x,y; 502 | while(*source) { 503 | if((*source == 37) &&//% 504 | ((x = source[1]) && (y = source[2])) && 505 | (isxdigit(x) && isxdigit(y))) { 506 | if(x >= 97) { 507 | x -= 32;//97,65 508 | } 509 | if(x >= 65) { 510 | x -= 55;//65 511 | } 512 | else { 513 | x -= 48; 514 | } 515 | if(y >= 97) { 516 | y -= 32;//97,65 517 | } 518 | if(y >= 65) { 519 | y -= 55;//65 520 | } 521 | else { 522 | y -= 48; 523 | } 524 | *destination++ = 16*x+y; 525 | source += 3; 526 | } 527 | else if(*source == 43) { 528 | *destination++ = 32; 529 | source++; 530 | } 531 | else { 532 | *destination++ = *source++; 533 | } 534 | } 535 | *destination++ = '\0'; 536 | } 537 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. By contrast, 15 | the GNU General Public License is intended to guarantee your freedom to 16 | share and change all versions of a program--to make sure it remains free 17 | software for all its users. We, the Free Software Foundation, use the 18 | GNU General Public License for most of our software; it applies also to 19 | any other work released this way by its authors. You can apply it to 20 | your programs, too. 21 | 22 | When we speak of free software, we are referring to freedom, not 23 | price. Our General Public Licenses are designed to make sure that you 24 | have the freedom to distribute copies of free software (and charge for 25 | them if you wish), that you receive source code or can get it if you 26 | want it, that you can change the software or use pieces of it in new 27 | free programs, and that you know you can do these things. 28 | 29 | To protect your rights, we need to prevent others from denying you 30 | these rights or asking you to surrender the rights. Therefore, you have 31 | certain responsibilities if you distribute copies of the software, or if 32 | you modify it: responsibilities to respect the freedom of others. 33 | 34 | For example, if you distribute copies of such a program, whether 35 | gratis or for a fee, you must pass on to the recipients the same 36 | freedoms that you received. You must make sure that they, too, receive 37 | or can get the source code. And you must show them these terms so they 38 | know their rights. 39 | 40 | Developers that use the GNU GPL protect your rights with two steps: 41 | (1) assert copyright on the software, and (2) offer you this License 42 | giving you legal permission to copy, distribute and/or modify it. 43 | 44 | For the developers' and authors' protection, the GPL clearly explains 45 | that there is no warranty for this free software. For both users' and 46 | authors' sake, the GPL requires that modified versions be marked as 47 | changed, so that their problems will not be attributed erroneously to 48 | authors of previous versions. 49 | 50 | Some devices are designed to deny users access to install or run 51 | modified versions of the software inside them, although the manufacturer 52 | can do so. This is fundamentally incompatible with the aim of 53 | protecting users' freedom to change the software. The systematic 54 | pattern of such abuse occurs in the area of products for individuals to 55 | use, which is precisely where it is most unacceptable. Therefore, we 56 | have designed this version of the GPL to prohibit the practice for those 57 | products. If such problems arise substantially in other domains, we 58 | stand ready to extend this provision to those domains in future versions 59 | of the GPL, as needed to protect the freedom of users. 60 | 61 | Finally, every program is threatened constantly by software patents. 62 | States should not allow patents to restrict development and use of 63 | software on general-purpose computers, but in those that do, we wish to 64 | avoid the special danger that patents applied to a free program could 65 | make it effectively proprietary. To prevent this, the GPL assures that 66 | patents cannot be used to render the program non-free. 67 | 68 | The precise terms and conditions for copying, distribution and 69 | modification follow. 70 | 71 | TERMS AND CONDITIONS 72 | 73 | 0. Definitions. 74 | 75 | "This License" refers to version 3 of the GNU General Public License. 76 | 77 | "Copyright" also means copyright-like laws that apply to other kinds of 78 | works, such as semiconductor masks. 79 | 80 | "The Program" refers to any copyrightable work licensed under this 81 | License. Each licensee is addressed as "you". "Licensees" and 82 | "recipients" may be individuals or organizations. 83 | 84 | To "modify" a work means to copy from or adapt all or part of the work 85 | in a fashion requiring copyright permission, other than the making of an 86 | exact copy. The resulting work is called a "modified version" of the 87 | earlier work or a work "based on" the earlier work. 88 | 89 | A "covered work" means either the unmodified Program or a work based 90 | on the Program. 91 | 92 | To "propagate" a work means to do anything with it that, without 93 | permission, would make you directly or secondarily liable for 94 | infringement under applicable copyright law, except executing it on a 95 | computer or modifying a private copy. Propagation includes copying, 96 | distribution (with or without modification), making available to the 97 | public, and in some countries other activities as well. 98 | 99 | To "convey" a work means any kind of propagation that enables other 100 | parties to make or receive copies. Mere interaction with a user through 101 | a computer network, with no transfer of a copy, is not conveying. 102 | 103 | An interactive user interface displays "Appropriate Legal Notices" 104 | to the extent that it includes a convenient and prominently visible 105 | feature that (1) displays an appropriate copyright notice, and (2) 106 | tells the user that there is no warranty for the work (except to the 107 | extent that warranties are provided), that licensees may convey the 108 | work under this License, and how to view a copy of this License. If 109 | the interface presents a list of user commands or options, such as a 110 | menu, a prominent item in the list meets this criterion. 111 | 112 | 1. Source Code. 113 | 114 | The "source code" for a work means the preferred form of the work 115 | for making modifications to it. "Object code" means any non-source 116 | form of a work. 117 | 118 | A "Standard Interface" means an interface that either is an official 119 | standard defined by a recognized standards body, or, in the case of 120 | interfaces specified for a particular programming language, one that 121 | is widely used among developers working in that language. 122 | 123 | The "System Libraries" of an executable work include anything, other 124 | than the work as a whole, that (a) is included in the normal form of 125 | packaging a Major Component, but which is not part of that Major 126 | Component, and (b) serves only to enable use of the work with that 127 | Major Component, or to implement a Standard Interface for which an 128 | implementation is available to the public in source code form. A 129 | "Major Component", in this context, means a major essential component 130 | (kernel, window system, and so on) of the specific operating system 131 | (if any) on which the executable work runs, or a compiler used to 132 | produce the work, or an object code interpreter used to run it. 133 | 134 | The "Corresponding Source" for a work in object code form means all 135 | the source code needed to generate, install, and (for an executable 136 | work) run the object code and to modify the work, including scripts to 137 | control those activities. However, it does not include the work's 138 | System Libraries, or general-purpose tools or generally available free 139 | programs which are used unmodified in performing those activities but 140 | which are not part of the work. For example, Corresponding Source 141 | includes interface definition files associated with source files for 142 | the work, and the source code for shared libraries and dynamically 143 | linked subprograms that the work is specifically designed to require, 144 | such as by intimate data communication or control flow between those 145 | subprograms and other parts of the work. 146 | 147 | The Corresponding Source need not include anything that users 148 | can regenerate automatically from other parts of the Corresponding 149 | Source. 150 | 151 | The Corresponding Source for a work in source code form is that 152 | same work. 153 | 154 | 2. Basic Permissions. 155 | 156 | All rights granted under this License are granted for the term of 157 | copyright on the Program, and are irrevocable provided the stated 158 | conditions are met. This License explicitly affirms your unlimited 159 | permission to run the unmodified Program. The output from running a 160 | covered work is covered by this License only if the output, given its 161 | content, constitutes a covered work. This License acknowledges your 162 | rights of fair use or other equivalent, as provided by copyright law. 163 | 164 | You may make, run and propagate covered works that you do not 165 | convey, without conditions so long as your license otherwise remains 166 | in force. You may convey covered works to others for the sole purpose 167 | of having them make modifications exclusively for you, or provide you 168 | with facilities for running those works, provided that you comply with 169 | the terms of this License in conveying all material for which you do 170 | not control copyright. Those thus making or running the covered works 171 | for you must do so exclusively on your behalf, under your direction 172 | and control, on terms that prohibit them from making any copies of 173 | your copyrighted material outside their relationship with you. 174 | 175 | Conveying under any other circumstances is permitted solely under 176 | the conditions stated below. Sublicensing is not allowed; section 10 177 | makes it unnecessary. 178 | 179 | 3. Protecting Users' Legal Rights From Anti-Circumvention Law. 180 | 181 | No covered work shall be deemed part of an effective technological 182 | measure under any applicable law fulfilling obligations under article 183 | 11 of the WIPO copyright treaty adopted on 20 December 1996, or 184 | similar laws prohibiting or restricting circumvention of such 185 | measures. 186 | 187 | When you convey a covered work, you waive any legal power to forbid 188 | circumvention of technological measures to the extent such circumvention 189 | is effected by exercising rights under this License with respect to 190 | the covered work, and you disclaim any intention to limit operation or 191 | modification of the work as a means of enforcing, against the work's 192 | users, your or third parties' legal rights to forbid circumvention of 193 | technological measures. 194 | 195 | 4. Conveying Verbatim Copies. 196 | 197 | You may convey verbatim copies of the Program's source code as you 198 | receive it, in any medium, provided that you conspicuously and 199 | appropriately publish on each copy an appropriate copyright notice; 200 | keep intact all notices stating that this License and any 201 | non-permissive terms added in accord with section 7 apply to the code; 202 | keep intact all notices of the absence of any warranty; and give all 203 | recipients a copy of this License along with the Program. 204 | 205 | You may charge any price or no price for each copy that you convey, 206 | and you may offer support or warranty protection for a fee. 207 | 208 | 5. Conveying Modified Source Versions. 209 | 210 | You may convey a work based on the Program, or the modifications to 211 | produce it from the Program, in the form of source code under the 212 | terms of section 4, provided that you also meet all of these conditions: 213 | 214 | a) The work must carry prominent notices stating that you modified 215 | it, and giving a relevant date. 216 | 217 | b) The work must carry prominent notices stating that it is 218 | released under this License and any conditions added under section 219 | 7. This requirement modifies the requirement in section 4 to 220 | "keep intact all notices". 221 | 222 | c) You must license the entire work, as a whole, under this 223 | License to anyone who comes into possession of a copy. This 224 | License will therefore apply, along with any applicable section 7 225 | additional terms, to the whole of the work, and all its parts, 226 | regardless of how they are packaged. This License gives no 227 | permission to license the work in any other way, but it does not 228 | invalidate such permission if you have separately received it. 229 | 230 | d) If the work has interactive user interfaces, each must display 231 | Appropriate Legal Notices; however, if the Program has interactive 232 | interfaces that do not display Appropriate Legal Notices, your 233 | work need not make them do so. 234 | 235 | A compilation of a covered work with other separate and independent 236 | works, which are not by their nature extensions of the covered work, 237 | and which are not combined with it such as to form a larger program, 238 | in or on a volume of a storage or distribution medium, is called an 239 | "aggregate" if the compilation and its resulting copyright are not 240 | used to limit the access or legal rights of the compilation's users 241 | beyond what the individual works permit. Inclusion of a covered work 242 | in an aggregate does not cause this License to apply to the other 243 | parts of the aggregate. 244 | 245 | 6. Conveying Non-Source Forms. 246 | 247 | You may convey a covered work in object code form under the terms 248 | of sections 4 and 5, provided that you also convey the 249 | machine-readable Corresponding Source under the terms of this License, 250 | in one of these ways: 251 | 252 | a) Convey the object code in, or embodied in, a physical product 253 | (including a physical distribution medium), accompanied by the 254 | Corresponding Source fixed on a durable physical medium 255 | customarily used for software interchange. 256 | 257 | b) Convey the object code in, or embodied in, a physical product 258 | (including a physical distribution medium), accompanied by a 259 | written offer, valid for at least three years and valid for as 260 | long as you offer spare parts or customer support for that product 261 | model, to give anyone who possesses the object code either (1) a 262 | copy of the Corresponding Source for all the software in the 263 | product that is covered by this License, on a durable physical 264 | medium customarily used for software interchange, for a price no 265 | more than your reasonable cost of physically performing this 266 | conveying of source, or (2) access to copy the 267 | Corresponding Source from a network server at no charge. 268 | 269 | c) Convey individual copies of the object code with a copy of the 270 | written offer to provide the Corresponding Source. This 271 | alternative is allowed only occasionally and noncommercially, and 272 | only if you received the object code with such an offer, in accord 273 | with subsection 6b. 274 | 275 | d) Convey the object code by offering access from a designated 276 | place (gratis or for a charge), and offer equivalent access to the 277 | Corresponding Source in the same way through the same place at no 278 | further charge. You need not require recipients to copy the 279 | Corresponding Source along with the object code. If the place to 280 | copy the object code is a network server, the Corresponding Source 281 | may be on a different server (operated by you or a third party) 282 | that supports equivalent copying facilities, provided you maintain 283 | clear directions next to the object code saying where to find the 284 | Corresponding Source. Regardless of what server hosts the 285 | Corresponding Source, you remain obligated to ensure that it is 286 | available for as long as needed to satisfy these requirements. 287 | 288 | e) Convey the object code using peer-to-peer transmission, provided 289 | you inform other peers where the object code and Corresponding 290 | Source of the work are being offered to the general public at no 291 | charge under subsection 6d. 292 | 293 | A separable portion of the object code, whose source code is excluded 294 | from the Corresponding Source as a System Library, need not be 295 | included in conveying the object code work. 296 | 297 | A "User Product" is either (1) a "consumer product", which means any 298 | tangible personal property which is normally used for personal, family, 299 | or household purposes, or (2) anything designed or sold for incorporation 300 | into a dwelling. In determining whether a product is a consumer product, 301 | doubtful cases shall be resolved in favor of coverage. For a particular 302 | product received by a particular user, "normally used" refers to a 303 | typical or common use of that class of product, regardless of the status 304 | of the particular user or of the way in which the particular user 305 | actually uses, or expects or is expected to use, the product. A product 306 | is a consumer product regardless of whether the product has substantial 307 | commercial, industrial or non-consumer uses, unless such uses represent 308 | the only significant mode of use of the product. 309 | 310 | "Installation Information" for a User Product means any methods, 311 | procedures, authorization keys, or other information required to install 312 | and execute modified versions of a covered work in that User Product from 313 | a modified version of its Corresponding Source. The information must 314 | suffice to ensure that the continued functioning of the modified object 315 | code is in no case prevented or interfered with solely because 316 | modification has been made. 317 | 318 | If you convey an object code work under this section in, or with, or 319 | specifically for use in, a User Product, and the conveying occurs as 320 | part of a transaction in which the right of possession and use of the 321 | User Product is transferred to the recipient in perpetuity or for a 322 | fixed term (regardless of how the transaction is characterized), the 323 | Corresponding Source conveyed under this section must be accompanied 324 | by the Installation Information. But this requirement does not apply 325 | if neither you nor any third party retains the ability to install 326 | modified object code on the User Product (for example, the work has 327 | been installed in ROM). 328 | 329 | The requirement to provide Installation Information does not include a 330 | requirement to continue to provide support service, warranty, or updates 331 | for a work that has been modified or installed by the recipient, or for 332 | the User Product in which it has been modified or installed. Access to a 333 | network may be denied when the modification itself materially and 334 | adversely affects the operation of the network or violates the rules and 335 | protocols for communication across the network. 336 | 337 | Corresponding Source conveyed, and Installation Information provided, 338 | in accord with this section must be in a format that is publicly 339 | documented (and with an implementation available to the public in 340 | source code form), and must require no special password or key for 341 | unpacking, reading or copying. 342 | 343 | 7. Additional Terms. 344 | 345 | "Additional permissions" are terms that supplement the terms of this 346 | License by making exceptions from one or more of its conditions. 347 | Additional permissions that are applicable to the entire Program shall 348 | be treated as though they were included in this License, to the extent 349 | that they are valid under applicable law. If additional permissions 350 | apply only to part of the Program, that part may be used separately 351 | under those permissions, but the entire Program remains governed by 352 | this License without regard to the additional permissions. 353 | 354 | When you convey a copy of a covered work, you may at your option 355 | remove any additional permissions from that copy, or from any part of 356 | it. (Additional permissions may be written to require their own 357 | removal in certain cases when you modify the work.) You may place 358 | additional permissions on material, added by you to a covered work, 359 | for which you have or can give appropriate copyright permission. 360 | 361 | Notwithstanding any other provision of this License, for material you 362 | add to a covered work, you may (if authorized by the copyright holders of 363 | that material) supplement the terms of this License with terms: 364 | 365 | a) Disclaiming warranty or limiting liability differently from the 366 | terms of sections 15 and 16 of this License; or 367 | 368 | b) Requiring preservation of specified reasonable legal notices or 369 | author attributions in that material or in the Appropriate Legal 370 | Notices displayed by works containing it; or 371 | 372 | c) Prohibiting misrepresentation of the origin of that material, or 373 | requiring that modified versions of such material be marked in 374 | reasonable ways as different from the original version; or 375 | 376 | d) Limiting the use for publicity purposes of names of licensors or 377 | authors of the material; or 378 | 379 | e) Declining to grant rights under trademark law for use of some 380 | trade names, trademarks, or service marks; or 381 | 382 | f) Requiring indemnification of licensors and authors of that 383 | material by anyone who conveys the material (or modified versions of 384 | it) with contractual assumptions of liability to the recipient, for 385 | any liability that these contractual assumptions directly impose on 386 | those licensors and authors. 387 | 388 | All other non-permissive additional terms are considered "further 389 | restrictions" within the meaning of section 10. If the Program as you 390 | received it, or any part of it, contains a notice stating that it is 391 | governed by this License along with a term that is a further 392 | restriction, you may remove that term. If a license document contains 393 | a further restriction but permits relicensing or conveying under this 394 | License, you may add to a covered work material governed by the terms 395 | of that license document, provided that the further restriction does 396 | not survive such relicensing or conveying. 397 | 398 | If you add terms to a covered work in accord with this section, you 399 | must place, in the relevant source files, a statement of the 400 | additional terms that apply to those files, or a notice indicating 401 | where to find the applicable terms. 402 | 403 | Additional terms, permissive or non-permissive, may be stated in the 404 | form of a separately written license, or stated as exceptions; 405 | the above requirements apply either way. 406 | 407 | 8. Termination. 408 | 409 | You may not propagate or modify a covered work except as expressly 410 | provided under this License. Any attempt otherwise to propagate or 411 | modify it is void, and will automatically terminate your rights under 412 | this License (including any patent licenses granted under the third 413 | paragraph of section 11). 414 | 415 | However, if you cease all violation of this License, then your 416 | license from a particular copyright holder is reinstated (a) 417 | provisionally, unless and until the copyright holder explicitly and 418 | finally terminates your license, and (b) permanently, if the copyright 419 | holder fails to notify you of the violation by some reasonable means 420 | prior to 60 days after the cessation. 421 | 422 | Moreover, your license from a particular copyright holder is 423 | reinstated permanently if the copyright holder notifies you of the 424 | violation by some reasonable means, this is the first time you have 425 | received notice of violation of this License (for any work) from that 426 | copyright holder, and you cure the violation prior to 30 days after 427 | your receipt of the notice. 428 | 429 | Termination of your rights under this section does not terminate the 430 | licenses of parties who have received copies or rights from you under 431 | this License. If your rights have been terminated and not permanently 432 | reinstated, you do not qualify to receive new licenses for the same 433 | material under section 10. 434 | 435 | 9. Acceptance Not Required for Having Copies. 436 | 437 | You are not required to accept this License in order to receive or 438 | run a copy of the Program. Ancillary propagation of a covered work 439 | occurring solely as a consequence of using peer-to-peer transmission 440 | to receive a copy likewise does not require acceptance. However, 441 | nothing other than this License grants you permission to propagate or 442 | modify any covered work. These actions infringe copyright if you do 443 | not accept this License. Therefore, by modifying or propagating a 444 | covered work, you indicate your acceptance of this License to do so. 445 | 446 | 10. Automatic Licensing of Downstream Recipients. 447 | 448 | Each time you convey a covered work, the recipient automatically 449 | receives a license from the original licensors, to run, modify and 450 | propagate that work, subject to this License. You are not responsible 451 | for enforcing compliance by third parties with this License. 452 | 453 | An "entity transaction" is a transaction transferring control of an 454 | organization, or substantially all assets of one, or subdividing an 455 | organization, or merging organizations. If propagation of a covered 456 | work results from an entity transaction, each party to that 457 | transaction who receives a copy of the work also receives whatever 458 | licenses to the work the party's predecessor in interest had or could 459 | give under the previous paragraph, plus a right to possession of the 460 | Corresponding Source of the work from the predecessor in interest, if 461 | the predecessor has it or can get it with reasonable efforts. 462 | 463 | You may not impose any further restrictions on the exercise of the 464 | rights granted or affirmed under this License. For example, you may 465 | not impose a license fee, royalty, or other charge for exercise of 466 | rights granted under this License, and you may not initiate litigation 467 | (including a cross-claim or counterclaim in a lawsuit) alleging that 468 | any patent claim is infringed by making, using, selling, offering for 469 | sale, or importing the Program or any portion of it. 470 | 471 | 11. Patents. 472 | 473 | A "contributor" is a copyright holder who authorizes use under this 474 | License of the Program or a work on which the Program is based. The 475 | work thus licensed is called the contributor's "contributor version". 476 | 477 | A contributor's "essential patent claims" are all patent claims 478 | owned or controlled by the contributor, whether already acquired or 479 | hereafter acquired, that would be infringed by some manner, permitted 480 | by this License, of making, using, or selling its contributor version, 481 | but do not include claims that would be infringed only as a 482 | consequence of further modification of the contributor version. For 483 | purposes of this definition, "control" includes the right to grant 484 | patent sublicenses in a manner consistent with the requirements of 485 | this License. 486 | 487 | Each contributor grants you a non-exclusive, worldwide, royalty-free 488 | patent license under the contributor's essential patent claims, to 489 | make, use, sell, offer for sale, import and otherwise run, modify and 490 | propagate the contents of its contributor version. 491 | 492 | In the following three paragraphs, a "patent license" is any express 493 | agreement or commitment, however denominated, not to enforce a patent 494 | (such as an express permission to practice a patent or covenant not to 495 | sue for patent infringement). To "grant" such a patent license to a 496 | party means to make such an agreement or commitment not to enforce a 497 | patent against the party. 498 | 499 | If you convey a covered work, knowingly relying on a patent license, 500 | and the Corresponding Source of the work is not available for anyone 501 | to copy, free of charge and under the terms of this License, through a 502 | publicly available network server or other readily accessible means, 503 | then you must either (1) cause the Corresponding Source to be so 504 | available, or (2) arrange to deprive yourself of the benefit of the 505 | patent license for this particular work, or (3) arrange, in a manner 506 | consistent with the requirements of this License, to extend the patent 507 | license to downstream recipients. "Knowingly relying" means you have 508 | actual knowledge that, but for the patent license, your conveying the 509 | covered work in a country, or your recipient's use of the covered work 510 | in a country, would infringe one or more identifiable patents in that 511 | country that you have reason to believe are valid. 512 | 513 | If, pursuant to or in connection with a single transaction or 514 | arrangement, you convey, or propagate by procuring conveyance of, a 515 | covered work, and grant a patent license to some of the parties 516 | receiving the covered work authorizing them to use, propagate, modify 517 | or convey a specific copy of the covered work, then the patent license 518 | you grant is automatically extended to all recipients of the covered 519 | work and works based on it. 520 | 521 | A patent license is "discriminatory" if it does not include within 522 | the scope of its coverage, prohibits the exercise of, or is 523 | conditioned on the non-exercise of one or more of the rights that are 524 | specifically granted under this License. You may not convey a covered 525 | work if you are a party to an arrangement with a third party that is 526 | in the business of distributing software, under which you make payment 527 | to the third party based on the extent of your activity of conveying 528 | the work, and under which the third party grants, to any of the 529 | parties who would receive the covered work from you, a discriminatory 530 | patent license (a) in connection with copies of the covered work 531 | conveyed by you (or copies made from those copies), or (b) primarily 532 | for and in connection with specific products or compilations that 533 | contain the covered work, unless you entered into that arrangement, 534 | or that patent license was granted, prior to 28 March 2007. 535 | 536 | Nothing in this License shall be construed as excluding or limiting 537 | any implied license or other defenses to infringement that may 538 | otherwise be available to you under applicable patent law. 539 | 540 | 12. No Surrender of Others' Freedom. 541 | 542 | If conditions are imposed on you (whether by court order, agreement or 543 | otherwise) that contradict the conditions of this License, they do not 544 | excuse you from the conditions of this License. If you cannot convey a 545 | covered work so as to satisfy simultaneously your obligations under this 546 | License and any other pertinent obligations, then as a consequence you may 547 | not convey it at all. For example, if you agree to terms that obligate you 548 | to collect a royalty for further conveying from those to whom you convey 549 | the Program, the only way you could satisfy both those terms and this 550 | License would be to refrain entirely from conveying the Program. 551 | 552 | 13. Use with the GNU Affero General Public License. 553 | 554 | Notwithstanding any other provision of this License, you have 555 | permission to link or combine any covered work with a work licensed 556 | under version 3 of the GNU Affero General Public License into a single 557 | combined work, and to convey the resulting work. The terms of this 558 | License will continue to apply to the part which is the covered work, 559 | but the special requirements of the GNU Affero General Public License, 560 | section 13, concerning interaction through a network will apply to the 561 | combination as such. 562 | 563 | 14. Revised Versions of this License. 564 | 565 | The Free Software Foundation may publish revised and/or new versions of 566 | the GNU General Public License from time to time. Such new versions will 567 | be similar in spirit to the present version, but may differ in detail to 568 | address new problems or concerns. 569 | 570 | Each version is given a distinguishing version number. If the 571 | Program specifies that a certain numbered version of the GNU General 572 | Public License "or any later version" applies to it, you have the 573 | option of following the terms and conditions either of that numbered 574 | version or of any later version published by the Free Software 575 | Foundation. If the Program does not specify a version number of the 576 | GNU General Public License, you may choose any version ever published 577 | by the Free Software Foundation. 578 | 579 | If the Program specifies that a proxy can decide which future 580 | versions of the GNU General Public License can be used, that proxy's 581 | public statement of acceptance of a version permanently authorizes you 582 | to choose that version for the Program. 583 | 584 | Later license versions may give you additional or different 585 | permissions. However, no additional obligations are imposed on any 586 | author or copyright holder as a result of your choosing to follow a 587 | later version. 588 | 589 | 15. Disclaimer of Warranty. 590 | 591 | THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY 592 | APPLICABLE LAW. EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT 593 | HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY 594 | OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, 595 | THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 596 | PURPOSE. THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM 597 | IS WITH YOU. SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF 598 | ALL NECESSARY SERVICING, REPAIR OR CORRECTION. 599 | 600 | 16. Limitation of Liability. 601 | 602 | IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING 603 | WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS 604 | THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY 605 | GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE 606 | USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF 607 | DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD 608 | PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS), 609 | EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF 610 | SUCH DAMAGES. 611 | 612 | 17. Interpretation of Sections 15 and 16. 613 | 614 | If the disclaimer of warranty and limitation of liability provided 615 | above cannot be given local legal effect according to their terms, 616 | reviewing courts shall apply local law that most closely approximates 617 | an absolute waiver of all civil liability in connection with the 618 | Program, unless a warranty or assumption of liability accompanies a 619 | copy of the Program in return for a fee. 620 | 621 | END OF TERMS AND CONDITIONS 622 | 623 | How to Apply These Terms to Your New Programs 624 | 625 | If you develop a new program, and you want it to be of the greatest 626 | possible use to the public, the best way to achieve this is to make it 627 | free software which everyone can redistribute and change under these terms. 628 | 629 | To do so, attach the following notices to the program. It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | 635 | Copyright (C) 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | Copyright (C) 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | --------------------------------------------------------------------------------