| 1 | /*␊ |
| 2 | * KernOptionsParser.cpp␊ |
| 3 | * ChameleonPrefPane␊ |
| 4 | *␊ |
| 5 | * Created by Rekursor on 1/23/10.␊ |
| 6 | */␊ |
| 7 | ␊ |
| 8 | #include "KernOptionsParser.h"␊ |
| 9 | #include "string_util.h"␊ |
| 10 | ␊ |
| 11 | bool KernOptionsParser::parseOptions(const char* options)␊ |
| 12 | {␊ |
| 13 | ␉_options = options ? trim(options) : "";␊ |
| 14 | ␉std::string token, temp=_options;␊ |
| 15 | ␉␊ |
| 16 | ␉// first remove spaces around '=' to simplify parsing␊ |
| 17 | ␉std::string::size_type found = std::string::npos;␊ |
| 18 | ␉while ((found=_options.find(" =")) != std::string::npos) _options.replace(found, 3,"=");␊ |
| 19 | ␉while ((found=_options.find("= ")) != std::string::npos) _options.replace(found, 3,"=");␊ |
| 20 | ␉␊ |
| 21 | ␉// then tokenize the string␊ |
| 22 | ␉_optionsList = tokenize(_options);␊ |
| 23 | ␊ |
| 24 | ␉return true;␊ |
| 25 | }␊ |
| 26 | ␊ |
| 27 | static const std::string sEmpty="";␊ |
| 28 | ␊ |
| 29 | // get the corresponding kern option "xxxx=yyyy"␊ |
| 30 | const std::string& KernOptionsParser::stringFromKey(const std::string& key) const␊ |
| 31 | {␊ |
| 32 | ␉for (std::list<std::string>::const_iterator it=_optionsList.begin(); it!=_optionsList.end(); it++)␊ |
| 33 | ␉␉if (it->find(key)!=std::string::npos) return *it;␊ |
| 34 | ␉␊ |
| 35 | ␉return sEmpty;␊ |
| 36 | }␊ |
| 37 | ␊ |
| 38 | // get the left member of kern option "xxxx=yyyy"␊ |
| 39 | const std::string& KernOptionsParser::leftMember(const std::string& expression) const␊ |
| 40 | {␊ |
| 41 | ␉static std::string sLeft;␊ |
| 42 | ␉std::string::size_type pos = expression.find('=');␊ |
| 43 | ␉␊ |
| 44 | ␉if (pos!=std::string::npos)␊ |
| 45 | ␉␉return (sLeft = expression.substr(0, pos));␊ |
| 46 | ␉return expression;␊ |
| 47 | }␊ |
| 48 | ␊ |
| 49 | // get the right member of kern option "xxxx=yyyy"␊ |
| 50 | const std::string& KernOptionsParser::rightMember(const std::string& expression) const␊ |
| 51 | {␊ |
| 52 | ␉static std::string sLeft;␊ |
| 53 | ␉std::string::size_type pos = expression.find('=');␊ |
| 54 | ␉␊ |
| 55 | ␉if (pos!=std::string::npos)␊ |
| 56 | ␉␉return (sLeft = expression.substr(pos+1));␊ |
| 57 | ␉return expression;␊ |
| 58 | }␊ |
| 59 | // remove a flag in the string␊ |
| 60 | void KernOptionsParser::removeFlag(const std::string& flag)␊ |
| 61 | {␊ |
| 62 | ␉if (flag.length()==0) return; // not a flag, bye␊ |
| 63 | ␉std::string::size_type pos, l = _options.length();␉␊ |
| 64 | ␉if (l==0) return; // empty options nothing to do␉␊ |
| 65 | ␉std::string f = string_left(flag, "=");␊ |
| 66 | ␉std::string::size_type found = _options.find(f);␊ |
| 67 | ␉if (found==std::string::npos) return;␊ |
| 68 | ␉// find the end of the flag␊ |
| 69 | ␉for ( pos=found+f.length(); pos<l && _options[pos]!=' '; pos++);␊ |
| 70 | ␉_options.erase(found, pos);␊ |
| 71 | ␉_options = trim(_options);␊ |
| 72 | }␊ |
| 73 | ␊ |
| 74 | // remove a flag in the string␊ |
| 75 | void KernOptionsParser::addFlag(const std::string& flag)␊ |
| 76 | {␊ |
| 77 | ␉// finding a flag can be tricky as some have a variable part of the form:␊ |
| 78 | ␉// flag=value and what we want is to keep identify them while they will varyà␊ |
| 79 | ␉std::string key= string_left(flag,"=");␊ |
| 80 | ␉␊ |
| 81 | ␉std::string::size_type found = _options.find(key);␊ |
| 82 | ␉if (found!=std::string::npos) ␊ |
| 83 | ␉␉removeFlag(key);␊ |
| 84 | ␉_options = " " + _options;␊ |
| 85 | ␉_options = flag + _options;␊ |
| 86 | ␉_options = trim(_options);␊ |
| 87 | }␊ |
| 88 | |
