diff options
Diffstat (limited to 'apt-pkg/contrib/cmndline.cc')
-rw-r--r-- | apt-pkg/contrib/cmndline.cc | 280 |
1 files changed, 280 insertions, 0 deletions
diff --git a/apt-pkg/contrib/cmndline.cc b/apt-pkg/contrib/cmndline.cc new file mode 100644 index 00000000..6b36325c --- /dev/null +++ b/apt-pkg/contrib/cmndline.cc @@ -0,0 +1,280 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +// $Id: cmndline.cc,v 1.1 1998/09/22 05:30:26 jgg Exp $ +/* ###################################################################### + + Command Line Class - Sophisticated command line parser + + ##################################################################### */ + /*}}}*/ +// Include files /*{{{*/ +#ifdef __GNUG__ +#pragma implementation "apt-pkg/cmndline.h" +#endif +#include <apt-pkg/cmndline.h> +#include <apt-pkg/error.h> +#include <strutl.h> + /*}}}*/ + +// CommandLine::CommandLine - Constructor /*{{{*/ +// --------------------------------------------------------------------- +/* */ +CommandLine::CommandLine(Args *AList,Configuration *Conf) : ArgList(AList), + Conf(Conf), FileList(0) +{ +} + /*}}}*/ +// CommandLine::Parse - Main action member /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool CommandLine::Parse(int argc,const char **argv) +{ + FileList = new const char *[argc]; + const char **Files = FileList; + int I; + for (I = 1; I != argc; I++) + { + const char *Opt = argv[I]; + + // It is not an option + if (*Opt != '-') + { + *Files++ = Opt; + continue; + } + + Opt++; + + // Double dash signifies the end of option processing + if (*Opt == '-' && Opt[1] == 0) + break; + + // Single dash is a short option + if (*Opt != '-') + { + // Iterate over each letter + while (*Opt != 0) + { + // Search for the option + Args *A; + for (A = ArgList; A->end() == false && A->ShortOpt != *Opt; A++); + if (A->end() == true) + return _error->Error("Command line option '%c' [from %s] is not known.",*Opt,argv[I]); + + if (HandleOpt(I,argc,argv,Opt,A) == false) + return false; + if (*Opt != 0) + Opt++; + } + continue; + } + + Opt++; + + // Match up to a = against the list + const char *OptEnd = Opt; + Args *A; + for (; *OptEnd != 0 && *OptEnd != '='; OptEnd++); + for (A = ArgList; A->end() == false && + stringcasecmp(Opt,OptEnd,A->LongOpt) != 0; A++); + + // Failed, look for a word after the first - (no-foo) + if (A->end() == true) + { + for (; Opt != OptEnd && *Opt != '-'; Opt++); + + if (Opt == OptEnd) + return _error->Error("Command line option %s is not understood",argv[I]); + Opt++; + + for (A = ArgList; A->end() == false && + stringcasecmp(Opt,OptEnd,A->LongOpt) != 0; A++); + + // Failed again.. + if (A->end() == true && OptEnd - Opt != 1) + return _error->Error("Command line option %s is not understood",argv[I]); + + // The option could be a single letter option prefixed by a no-.. + for (A = ArgList; A->end() == false && A->ShortOpt != *Opt; A++); + + if (A->end() == true) + return _error->Error("Command line option %s is not understood",argv[I]); + } + + // Deal with it. + OptEnd--; + if (HandleOpt(I,argc,argv,OptEnd,A) == false) + return false; + } + + // Copy any remaining file names over + for (; I != argc; I++) + *Files++ = argv[I]; + *Files = 0; + + return true; +} + /*}}}*/ +// CommandLine::HandleOpt - Handle a single option including all flags /*{{{*/ +// --------------------------------------------------------------------- +/* This is a helper function for parser, it looks at a given argument + and looks for specific patterns in the string, it gets tokanized + -ruffly- like -*[yes|true|enable]-(o|longopt)[=][ ][argument] */ +bool CommandLine::HandleOpt(int &I,int argc,const char *argv[], + const char *&Opt,Args *A) +{ + const char *Argument = 0; + bool CertainArg = false; + int IncI = 0; + + /* Determine the possible location of an option or 0 if their is + no option */ + if (Opt[1] == 0 || (Opt[1] == '=' && Opt[2] == 0)) + { + if (I + 1 < argc && argv[I+1][0] != '-') + Argument = argv[I+1]; + + // Equals was specified but we fell off the end! + if (Opt[1] == '=' && Argument == 0) + return _error->Error("Option %s requires an argument.",argv[I]); + if (Opt[1] == '=') + CertainArg = true; + + IncI = 1; + } + else + { + if (Opt[1] == '=') + { + CertainArg = true; + Argument = Opt + 2; + } + else + Argument = Opt + 1; + } + + // Option is an argument set + if ((A->Flags & HasArg) == HasArg) + { + if (Argument == 0) + return _error->Error("Option %s requires an argument.",argv[I]); + Opt += strlen(Opt); + I += IncI; + + // Parse a configuration file + if ((A->Flags & ConfigFile) == ConfigFile) + return ReadConfigFile(*Conf,Argument); + + Conf->Set(A->ConfName,Argument); + return true; + } + + // Option is an integer level + if ((A->Flags & IntLevel) == IntLevel) + { + // There might be an argument + if (Argument != 0) + { + char *EndPtr; + unsigned long Value = strtol(Argument,&EndPtr,10); + + // Conversion failed and the argument was specified with an =s + if (EndPtr == Argument && CertainArg == true) + return _error->Error("Option %s requires an integer argument, not '%s'",argv[I],Argument); + + // Conversion was ok, set the value and return + if (EndPtr != Argument) + { + Conf->Set(A->ConfName,Value); + Opt += strlen(Opt); + I += IncI; + return true; + } + } + + // Increase the level + Conf->Set(A->ConfName,Conf->FindI(A->ConfName)+1); + return true; + } + + // Option is a boolean + int Sense = -1; // -1 is unspecified, 0 is yes 1 is no + + // Look for an argument. + while (1) + { + // Look at preceeding text + char Buffer[300]; + if (Argument == 0) + { + if (strlen(argv[I]) >= sizeof(Buffer)) + return _error->Error("Option '%s' is too long",argv[I]); + + const char *J = argv[I]; + for (; *J != 0 && *J == '-'; J++); + const char *JEnd = J; + for (; *JEnd != 0 && *JEnd != '-'; JEnd++); + if (*JEnd != 0) + { + strncpy(Buffer,J,JEnd - J); + Buffer[JEnd - J] = 0; + Argument = Buffer; + CertainArg = true; + } + else + break; + } + + // Check for positives + if (strcasecmp(Argument,"yes") == 0 || + strcasecmp(Argument,"true") == 0 || + strcasecmp(Argument,"with") == 0 || + strcasecmp(Argument,"enable") == 0) + { + Sense = 1; + + // Eat the argument + if (Argument != Buffer) + { + Opt += strlen(Opt); + I += IncI; + } + break; + } + + // Check for negatives + if (strcasecmp(Argument,"no") == 0 || + strcasecmp(Argument,"false") == 0 || + strcasecmp(Argument,"without") == 0 || + strcasecmp(Argument,"disable") == 0) + { + Sense = 0; + + // Eat the argument + if (Argument != Buffer) + { + Opt += strlen(Opt); + I += IncI; + } + break; + } + + if (CertainArg == true) + return _error->Error("Sense %s is not understood, try true or false.",Argument); + + Argument = 0; + } + + // Indeterminate sense depends on the flag + if (Sense == -1) + { + if ((A->Flags & InvBoolean) == InvBoolean) + Sense = 0; + else + Sense = 1; + } + + Conf->Set(A->ConfName,Sense); + return true; +} + /*}}}*/ |