+// -*- 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;
+}
+ /*}}}*/
projects / apt.git / commitdiff
