[apt.git] / apt-pkg / contrib / cmndline.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: cmndline.cc,v 1.2 1998/09/26 05:34:24 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::~CommandLine - Destructor				/*{{{*/
// ---------------------------------------------------------------------
/* */
CommandLine::~CommandLine()
{
   delete [] FileList;
}
									/*}}}*/
// CommandLine::Parse - Main action member				/*{{{*/
// ---------------------------------------------------------------------
/* */
bool CommandLine::Parse(int argc,const char **argv)
{
   delete [] FileList;
   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]);
	 
	 // The option is not boolean
	 if (A->IsBoolean() == false)
	    return _error->Error("Command line option %s is not boolean",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);

      // Arbitary item specification
      if ((A->Flags & ArbItem) == ArbItem)
      {
	 const char *J;
	 for (J = Argument; *J != 0 && *J != '='; J++);
	 if (*J == 0)
	    return _error->Error("Option %s: Configuration item sepecification must have an =.",argv[I]);

	 Conf->Set(string(Argument,J-Argument),string(J+1));
	 
	 return true;
      }
      
      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;
}
									/*}}}*/
// CommandLine::FileSize - Count the number of filenames									/*{{{*/
// ---------------------------------------------------------------------
/* */
unsigned int CommandLine::FileSize() const
{
   unsigned int Count = 0;
   for (const char **I = FileList; I != 0 && *I != 0; I++)
      Count++;
   return Count;
}
									/*}}}*/
Commit	Line	Data
08e8f724 AL	1	// -- mode: cpp; mode: fold --
08e8f724 AL	2	// Description /{{{/
e1b74f61	3	// $Id: cmndline.cc,v 1.2 1998/09/26 05:34:24 jgg Exp $
08e8f724 AL	4	/* ######################################################################
	5
	6	Command Line Class - Sophisticated command line parser
	7
	8	##################################################################### */
	9	/}}}/
	10	// Include files /{{{/
	11	#ifdef __GNUG__
	12	#pragma implementation "apt-pkg/cmndline.h"
	13	#endif
	14	#include <apt-pkg/cmndline.h>
	15	#include <apt-pkg/error.h>
	16	#include <strutl.h>
	17	/}}}/
	18
	19	// CommandLine::CommandLine - Constructor /{{{/
	20	// ---------------------------------------------------------------------
	21	/* */
	22	CommandLine::CommandLine(Args AList,Configuration Conf) : ArgList(AList),
	23	Conf(Conf), FileList(0)
	24	{
e1b74f61 AL	25	}
	26	/}}}/
	27	// CommandLine::~CommandLine - Destructor /{{{/
	28	// ---------------------------------------------------------------------
	29	/* */
	30	CommandLine::~CommandLine()
	31	{
	32	delete [] FileList;
08e8f724 AL	33	}
	34	/}}}/
	35	// CommandLine::Parse - Main action member /{{{/
	36	// ---------------------------------------------------------------------
	37	/* */
	38	bool CommandLine::Parse(int argc,const char **argv)
	39	{
e1b74f61	40	delete [] FileList;
08e8f724 AL	41	FileList = new const char *[argc];
	42	const char **Files = FileList;
	43	int I;
	44	for (I = 1; I != argc; I++)
	45	{
	46	const char *Opt = argv[I];
	47
	48	// It is not an option
	49	if (*Opt != '-')
	50	{
	51	*Files++ = Opt;
	52	continue;
	53	}
	54
	55	Opt++;
	56
	57	// Double dash signifies the end of option processing
	58	if (*Opt == '-' && Opt[1] == 0)
	59	break;
	60
	61	// Single dash is a short option
	62	if (*Opt != '-')
	63	{
	64	// Iterate over each letter
	65	while (*Opt != 0)
	66	{
	67	// Search for the option
	68	Args *A;
	69	for (A = ArgList; A->end() == false && A->ShortOpt != *Opt; A++);
	70	if (A->end() == true)
	71	return _error->Error("Command line option '%c' [from %s] is not known.",*Opt,argv[I]);
	72
	73	if (HandleOpt(I,argc,argv,Opt,A) == false)
	74	return false;
	75	if (*Opt != 0)
	76	Opt++;
	77	}
	78	continue;
	79	}
	80
	81	Opt++;
	82
	83	// Match up to a = against the list
	84	const char *OptEnd = Opt;
	85	Args *A;
	86	for (; OptEnd != 0 && OptEnd != '='; OptEnd++);
	87	for (A = ArgList; A->end() == false &&
	88	stringcasecmp(Opt,OptEnd,A->LongOpt) != 0; A++);
	89
	90	// Failed, look for a word after the first - (no-foo)
	91	if (A->end() == true)
	92	{
	93	for (; Opt != OptEnd && *Opt != '-'; Opt++);
	94
	95	if (Opt == OptEnd)
	96	return _error->Error("Command line option %s is not understood",argv[I]);
	97	Opt++;
	98
	99	for (A = ArgList; A->end() == false &&
	100	stringcasecmp(Opt,OptEnd,A->LongOpt) != 0; A++);
	101
	102	// Failed again..
	103	if (A->end() == true && OptEnd - Opt != 1)
	104	return _error->Error("Command line option %s is not understood",argv[I]);
105
106	// The option could be a single letter option prefixed by a no-..
107	for (A = ArgList; A->end() == false && A->ShortOpt != *Opt; A++);
108
109	if (A->end() == true)
110	return _error->Error("Command line option %s is not understood",argv[I]);
e1b74f61 AL	111
	112	// The option is not boolean
	113	if (A->IsBoolean() == false)
	114	return _error->Error("Command line option %s is not boolean",argv[I]);
08e8f724 AL	115	}
	116
	117	// Deal with it.
	118	OptEnd--;
	119	if (HandleOpt(I,argc,argv,OptEnd,A) == false)
	120	return false;
	121	}
	122
	123	// Copy any remaining file names over
	124	for (; I != argc; I++)
	125	*Files++ = argv[I];
	126	*Files = 0;
	127
	128	return true;
	129	}
	130	/}}}/
	131	// CommandLine::HandleOpt - Handle a single option including all flags /{{{/
	132	// ---------------------------------------------------------------------
	133	/* This is a helper function for parser, it looks at a given argument
	134	and looks for specific patterns in the string, it gets tokanized
	135	-ruffly- like -[yes\|true\|enable]-(o\|longopt)[=][ ][argument] /
	136	bool CommandLine::HandleOpt(int &I,int argc,const char *argv[],
	137	const char &Opt,Args A)
	138	{
	139	const char *Argument = 0;
	140	bool CertainArg = false;
	141	int IncI = 0;
	142
	143	/* Determine the possible location of an option or 0 if their is
	144	no option */
	145	if (Opt[1] == 0 \|\| (Opt[1] == '=' && Opt[2] == 0))
	146	{
	147	if (I + 1 < argc && argv[I+1][0] != '-')
	148	Argument = argv[I+1];
	149
	150	// Equals was specified but we fell off the end!
	151	if (Opt[1] == '=' && Argument == 0)
	152	return _error->Error("Option %s requires an argument.",argv[I]);
	153	if (Opt[1] == '=')
	154	CertainArg = true;
	155
	156	IncI = 1;
	157	}
	158	else
	159	{
	160	if (Opt[1] == '=')
	161	{
	162	CertainArg = true;
	163	Argument = Opt + 2;
	164	}
	165	else
	166	Argument = Opt + 1;
	167	}
	168
	169	// Option is an argument set
	170	if ((A->Flags & HasArg) == HasArg)
	171	{
	172	if (Argument == 0)
	173	return _error->Error("Option %s requires an argument.",argv[I]);
	174	Opt += strlen(Opt);
	175	I += IncI;
	176
	177	// Parse a configuration file
	178	if ((A->Flags & ConfigFile) == ConfigFile)
179	return ReadConfigFile(*Conf,Argument);
e1b74f61 AL	180
	181	// Arbitary item specification
	182	if ((A->Flags & ArbItem) == ArbItem)
	183	{
	184	const char *J;
	185	for (J = Argument; J != 0 && J != '='; J++);
	186	if (*J == 0)
	187	return _error->Error("Option %s: Configuration item sepecification must have an =.",argv[I]);
	188
	189	Conf->Set(string(Argument,J-Argument),string(J+1));
	190
	191	return true;
	192	}
08e8f724 AL	193
	194	Conf->Set(A->ConfName,Argument);
	195	return true;
	196	}
	197
	198	// Option is an integer level
	199	if ((A->Flags & IntLevel) == IntLevel)
	200	{
	201	// There might be an argument
	202	if (Argument != 0)
	203	{
	204	char *EndPtr;
	205	unsigned long Value = strtol(Argument,&EndPtr,10);
	206
	207	// Conversion failed and the argument was specified with an =s
	208	if (EndPtr == Argument && CertainArg == true)
	209	return _error->Error("Option %s requires an integer argument, not '%s'",argv[I],Argument);
	210
	211	// Conversion was ok, set the value and return
	212	if (EndPtr != Argument)
	213	{
	214	Conf->Set(A->ConfName,Value);
	215	Opt += strlen(Opt);
	216	I += IncI;
	217	return true;
	218	}
	219	}
	220
	221	// Increase the level
	222	Conf->Set(A->ConfName,Conf->FindI(A->ConfName)+1);
	223	return true;
	224	}
	225
	226	// Option is a boolean
	227	int Sense = -1; // -1 is unspecified, 0 is yes 1 is no
	228
	229	// Look for an argument.
	230	while (1)
	231	{
	232	// Look at preceeding text
	233	char Buffer[300];
	234	if (Argument == 0)
	235	{
	236	if (strlen(argv[I]) >= sizeof(Buffer))
	237	return _error->Error("Option '%s' is too long",argv[I]);
	238
	239	const char *J = argv[I];
	240	for (; J != 0 && J == '-'; J++);
	241	const char *JEnd = J;
	242	for (; JEnd != 0 && JEnd != '-'; JEnd++);
	243	if (*JEnd != 0)
	244	{
	245	strncpy(Buffer,J,JEnd - J);
	246	Buffer[JEnd - J] = 0;
	247	Argument = Buffer;
	248	CertainArg = true;
	249	}
	250	else
	251	break;
	252	}
	253
	254	// Check for positives
	255	if (strcasecmp(Argument,"yes") == 0 \|\|
	256	strcasecmp(Argument,"true") == 0 \|\|
257	strcasecmp(Argument,"with") == 0 \|\|
258	strcasecmp(Argument,"enable") == 0)
259	{
260	Sense = 1;
261
262	// Eat the argument
263	if (Argument != Buffer)
264	{
265	Opt += strlen(Opt);
266	I += IncI;
267	}
268	break;
269	}
270
271	// Check for negatives
272	if (strcasecmp(Argument,"no") == 0 \|\|
273	strcasecmp(Argument,"false") == 0 \|\|
274	strcasecmp(Argument,"without") == 0 \|\|
275	strcasecmp(Argument,"disable") == 0)
276	{
277	Sense = 0;
278
279	// Eat the argument
280	if (Argument != Buffer)
281	{
282	Opt += strlen(Opt);
283	I += IncI;
284	}
285	break;
286	}
287
288	if (CertainArg == true)
289	return _error->Error("Sense %s is not understood, try true or false.",Argument);
290
291	Argument = 0;
292	}
293
294	// Indeterminate sense depends on the flag
295	if (Sense == -1)
296	{
297	if ((A->Flags & InvBoolean) == InvBoolean)
298	Sense = 0;
299	else
300	Sense = 1;
301	}
302
303	Conf->Set(A->ConfName,Sense);
304	return true;
305	}
306	/}}}/
e1b74f61 AL	307	// CommandLine::FileSize - Count the number of filenames /{{{/
	308	// ---------------------------------------------------------------------
	309	/* */
	310	unsigned int CommandLine::FileSize() const
	311	{
	312	unsigned int Count = 0;
	313	for (const char *I = FileList; I != 0 && I != 0; I++)
	314	Count++;
	315	return Count;
	316	}
	317	/}}}/