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New module for command line parsing

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git-svn-id: svn://svn.cc65.org/cc65/trunk@63 b7a2c559-68d2-44c3-8de9-860c34a00d81
This commit is contained in:
cuz 2000-06-14 07:09:10 +00:00
parent 9cc25f13b6
commit 94cee5c9b2
4 changed files with 246 additions and 2 deletions
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149
src/common/cmdline.c Normal file
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@ -0,0 +1,149 @@
/*****************************************************************************/
/* */
/* cmdline.c */
/* */
/* Helper functions for command line parsing */
/* */
/* */
/* */
/* (C) 2000 Ullrich von Bassewitz */
/* Wacholderweg 14 */
/* D-70597 Stuttgart */
/* EMail: uz@musoftware.de */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#include <stdio.h>
#include <stdlib.h>
#include "cmdline.h"
/*****************************************************************************/
/* Data */
/*****************************************************************************/
static char** ArgVec = 0;
static unsigned ArgCount = 0;
/*****************************************************************************/
/* Code */
/*****************************************************************************/
void InitCmdLine (char* aArgVec[], unsigned aArgCount)
/* Initialize command line parsing. aArgVec is the argument array terminated by
* a NULL pointer (as usual), ArgCount is the number of valid arguments in the
* array. Both arguments are remembered in static storage.
*/
{
ArgVec = aArgVec;
ArgCount = aArgCount;
}
void UnknownOption (const char* Opt)
/* Print an error about an unknown option. */
{
fprintf (stderr, "Unknown option: %s\n", Opt);
exit (EXIT_FAILURE);
}
void NeedArg (const char* Opt)
/* Print an error about a missing option argument and exit. */
{
fprintf (stderr, "Option requires an argument: %s\n", Opt);
exit (EXIT_FAILURE);
}
void InvSym (const char* Def)
/* Print an error about an invalid symbol definition and die */
{
fprintf (stderr, "Invalid symbol definition: `%s'\n", Def);
exit (EXIT_FAILURE);
}
const char* GetArg (int* ArgNum, unsigned Len)
/* Get an argument for a short option. The argument may be appended to the
* option itself or may be separate. Len is the length of the option string.
*/
{
const char* Arg = ArgVec[*ArgNum];
if (Arg[Len] != '\0') {
/* Argument appended */
return Arg + Len;
} else {
/* Separate argument */
Arg = ArgVec[*ArgNum + 1];
if (Arg == 0) {
/* End of arguments */
NeedArg (ArgVec[*ArgNum]);
}
++(*ArgNum);
return Arg;
}
}
void LongOption (int* ArgNum, const LongOpt* OptTab, unsigned OptCount)
/* Handle a long command line option */
{
/* Get the option and the argument (which may be zero) */
const char* Opt = ArgVec[*ArgNum];
/* Search the table for a match */
while (OptCount) {
if (strcmp (Opt, OptTab->Option) == 0) {
/* Found, call the function */
if (OptTab->ArgCount > 0) {
OptTab->Func (Opt, ArgVec[++(*ArgNum)]);
} else {
OptTab->Func (Opt, 0);
}
}
/* Next table entry */
--OptCount;
++OptTab;
}
/* Invalid option */
UnknownOption (Opt);
}

93
src/common/cmdline.h Normal file
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@ -0,0 +1,93 @@
/*****************************************************************************/
/* */
/* cmdline.h */
/* */
/* Helper functions for command line parsing */
/* */
/* */
/* */
/* (C) 2000 Ullrich von Bassewitz */
/* Wacholderweg 14 */
/* D-70597 Stuttgart */
/* EMail: uz@musoftware.de */
/* */
/* */
/* This software is provided 'as-is', without any expressed or implied */
/* warranty. In no event will the authors be held liable for any damages */
/* arising from the use of this software. */
/* */
/* Permission is granted to anyone to use this software for any purpose, */
/* including commercial applications, and to alter it and redistribute it */
/* freely, subject to the following restrictions: */
/* */
/* 1. The origin of this software must not be misrepresented; you must not */
/* claim that you wrote the original software. If you use this software */
/* in a product, an acknowledgment in the product documentation would be */
/* appreciated but is not required. */
/* 2. Altered source versions must be plainly marked as such, and must not */
/* be misrepresented as being the original software. */
/* 3. This notice may not be removed or altered from any source */
/* distribution. */
/* */
/*****************************************************************************/
#ifndef CMDLINE_H
#define CMDLINE_H
/*****************************************************************************/
/* Data */
/*****************************************************************************/
/* Structure defining a long option */
typedef struct LongOpt LongOpt;
struct LongOpt {
const char* Option;
unsigned ArgCount;
void (*Func) (const char* Opt, const char* Arg);
};
/*****************************************************************************/
/* Code */
/*****************************************************************************/
void InitCmdLine (char* aArgVec[], unsigned aArgCount);
/* Initialize command line parsing. aArgVec is the argument array terminated by
* a NULL pointer (as usual), ArgCount is the number of valid arguments in the
* array. Both arguments are remembered in static storage.
*/
void UnknownOption (const char* Opt);
/* Print an error about an unknown option. */
void NeedArg (const char* Opt);
/* Print an error about a missing option argument and exit. */
void InvSym (const char* Def);
/* Print an error about an invalid symbol definition and die */
const char* GetArg (int* ArgNum, unsigned Len);
/* Get an argument for a short option. The argument may be appended to the
* option itself or may be separate. Len is the length of the option string.
*/
void LongOption (int* ArgNum, const LongOpt* OptTab, unsigned OptCount);
/* Handle a long command line option */
/* End of cmdline.h */
#endif

3
src/common/make/gcc.mak
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@ -10,8 +10,9 @@ LIB = common.a
OBJS = bitops.o \
cmdline.o \
hashstr.o \
xsprintf.o
xsprintf.o
# ------------------------------------------------------------------------------

3
src/common/make/watcom.mak
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@ -66,10 +66,11 @@ CCCFG = -bt=$(TARGET) -d1 -onatx -zp4 -5 -zq -w2
# All library OBJ files
OBJS = bitops.obj \
cmdline.obj \
hashstr.obj \
wildargv.obj \
xsprintf.obj
.PRECIOUS $(OBJS:.obj=.cc) $(LIB)