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GetWord.c
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C/C++ Source or Header
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1995-03-20
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143 lines
/******************************************************************************
MODULE
GetWord.c
DESCRIPTION
Get a number and some strings on Commandline
and write one of them to StdOut
NOTES
Kickstart 2.0+ required
compiles w/ SAS/C v6.51
BUGS
none known
TODO
EXAMPLES
> getword 1 x y z
y
SEE ALSO
INDEX
HISTORY
01-08-93 b_noll created
23-08-93 b_noll completed
11-02-95 b_noll slight changes
20-02-95 b_noll restructured source
21-02-95 b_noll added version/format-prefix/offset
20-03-95 b_noll added args diagnostics
AUTHOR
Bernd Noll, Brunnenstrasse 55, D-67661 Kaiserslautern
b_noll@informatik.uni-kl.de
******************************************************************************/
/**************************************
Includes
**************************************/
#ifndef EXEC_LIBRARIES_H
# include <exec/libraries.h>
#endif /* EXEC_LIBRARIES_H */
#ifndef CLIB_EXEC_PROTOS_H
# include <clib/exec_protos.h>
#endif /* CLIB_EXEC_PROTOS_H */
#ifndef DOS_DOS_H
# include <dos/dos.h>
#endif /* DOS_DOS_H */
#ifndef CLIB_DOS_PROTOS_H
# include <clib/dos_protos.h>
#endif /* CLIB_DOS_PROTOS_H */
#include <proto/dos.h>
#include <proto/exec.h>
/**************************************
Defines & Structures
**************************************/
#ifndef ABSEXECBASE
#define ABSEXECBASE ((struct ExecBase **)4L)
#endif
struct _arg {
/* ******************** USER FORMAT ******************** */
#define FORMAT "NUMBER/N/A,WORDS/M"
LONG * num;
STRPTR* words;
/* ******************** USER FORMAT ******************** */
}; /* struct _argv */
#define MAXPATHLEN 256
#define MAXLINELEN 256
#define VERSIONPREFIX "\0$VER: "
#define VERSIONOFFSET 0
#define FORMATPREFIX "\0$ARG: "
#define FORMATOFFSET 7
/**************************************
Implementation
**************************************/
long _main (void)
{
const char * version = VERSIONPREFIX "GetWord 1.3 " __AMIGADATE__ + VERSIONOFFSET;
long retval = RETURN_FAIL;
struct ExecBase*SysBase = *ABSEXECBASE;
struct Library* DOSBase;
if (DOSBase = OpenLibrary (DOSNAME, 37)) {
struct _arg argv = { 0 };
APTR args;
retval = RETURN_ERROR;
if (args = (void*)ReadArgs(FORMATPREFIX FORMAT + FORMATOFFSET, (LONG*)&argv, NULL)) {
/* ******************** USER BODY ******************** */
long num, cnt;
for (cnt = 0; argv.words[cnt]; ++cnt);
num = *(argv.num);
if (num < 0) num += cnt+1;
//retval = RETURN_WARN; /* if no error is wanted ... */
if (num == 0 || num > cnt) {
SetIoErr (ERROR_BAD_NUMBER);
} else {
retval = RETURN_WARN;
if (PutStr (argv.words[num-1]) == 0) retval = RETURN_OK;
PutStr("\n");
} /* if */
/* ******************** USER BODY ******************** */
FreeArgs (args);
} /* if */
if (retval > RETURN_WARN)
PrintFault(IoErr(), "GetWord");
CloseLibrary (DOSBase);
} /* if */
return (retval);
} /* _main */
/******************************************************************************
***** END GetWord.c
******************************************************************************/