;/* Pattern.c.   AmigaMail pattern matching example.  Compiled with SAS/C 5.10a:
lc -cfis -v -d0 -b0 -j73 Pattern.c
blink from Pattern.o to Pattern lib lib:amiga.lib
quit
*/
/* (c)  Copyright 1991 Commodore-Amiga, Inc.   All rights reserved.
The information contained herein is subject to change without notice,
and is provided "as is" without warranty of any kind, either expressed
or implied.  The entire risk as to the use of this information is
assumed by the user.
*/

#include <exec/types.h>
#include <exec/memory.h>
#include <dos/dos.h>
#include <dos/dosasl.h>
#include <dos/rdargs.h>

#include <clib/exec_protos.h>
#include <clib/dos_protos.h>
#include <clib/utility_protos.h>

/* define pragmas if you have them
#define PRAGMAS */
#ifdef PRAGMAS
#include <pragmas/exec_pragmas.h>
#include <pragmas/dos_pragmas.h>
#include <pragmas/utility_pragmas.h>
#else
struct ExecBase *SysBase;
struct DosLibrary *DOSBase;
struct Library *UtilityBase;
#endif

VOID            main(VOID);
UWORD           StrLen(UBYTE *);

VOID main(VOID)
{
#ifdef PRAGMAS
    struct DosLibrary *DOSBase;
    struct Library *UtilityBase;

#endif

    struct RDArgs  *readargs;
    LONG            rargs[3];
    LONG            vargs[4];
    UBYTE         **strings;
    UBYTE          *pattern, *parsebuffer;
    UWORD           case_sensitive, buffersize;
    LONG            iswild, success;
    COUNT           i;

#ifndef PRAGMAS
    /* set up SysBase */
    SysBase = (*((struct Library **) 4));
#endif

    /* Fail silently if < 37 */
    if (DOSBase = (struct DosLibrary *) OpenLibrary("dos.library", 37))
    {
        UtilityBase = DOSBase->dl_UtilityBase;

        /* See the DOS Autodocs for more information about ReadArgs() */
        if (readargs = ReadArgs("PATTERN/A,CASE/S,STRINGS/A/M", rargs, NULL))
        {

            /* The pattern. */
            pattern = (UBYTE *) (rargs[0]);

            /*
             * Case sensitive or not? (default not. Note filename matching
             * should ALWAYS be case insensitive).
             */
            case_sensitive = (UWORD) (rargs[1]);

            /* Pointer to array of strings to match */
            strings = (UBYTE **) (rargs[2]);

            /* Get a buffer big enough to hold all the tokens */
            buffersize = StrLen(pattern) * 3;

            if (parsebuffer = AllocMem(buffersize, MEMF_CLEAR))
            {

                /* Parse the pattern, according to case sensitivity flag */
                if (case_sensitive)
                    iswild = ParsePattern(pattern, parsebuffer, buffersize);
                else
                {
                    /* make pattern uppercase in case of character classes */
                    i = 0;
                    while (pattern[i])
                        pattern[i] = ToUpper(pattern[i++]);
                    iswild = ParsePatternNoCase(pattern, parsebuffer, buffersize);
                }

                /*
                 * -1 if ParsePattern() failed, 0 for no wildcards, 1 for
                 * wildcards. For this I don't care if the supplied pattern had
                 * wildcards or not.
                 */
                if (iswild != -1)
                {
                    /* The array of strings is terminated with a NULL */
                    while (*strings)
                    {

                        /*
                         * MatchPattern() returns 1 for a successful match, 0
                         * for no match
                         */
                        if (case_sensitive)
                            success = MatchPattern(parsebuffer, *strings);
                        else
                            success = MatchPatternNoCase(parsebuffer, *strings);
                        if (success)
                        {
                            vargs[0] = (LONG) * strings;
                            VFPrintf(Output(), "Match: %s\n", vargs);
                        }
                        else
                        {
                            if (IoErr() != 0)
                            {
                                VFPrintf(Output(), "Overflow\n", NULL);
                                break;
                            }
                        }
                        strings++;
                    }
                }
                else
                    PrintFault(ERROR_BAD_TEMPLATE, pattern);
                FreeMem(parsebuffer, buffersize);
            }
            else
                PrintFault(ERROR_NO_FREE_STORE, NULL);
            FreeArgs(readargs);
        }
        else
            PrintFault(IoErr(), NULL);
        CloseLibrary((struct Library *) DOSBase);
    }
}

UWORD StrLen(UBYTE * string)
{
    UBYTE          *length = string + 1;

    while (*string++ != '\0');
    return ((UWORD) (string - length));
}