Carp C++ Example

/*

Carp Example

*/

#include <stdio.h>
#include <string.h>
#include "carp.hpp"

static unsigned short Map[256] =
{
    0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
    10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
    20, 21, 22, 23, 24, 25, 26, 27, 28, 29,
    30, 31, 32, 33, 34, 35, 36, 37, 38, 39,
    40, 41, 42, 43, 44, 45, 46, 47, 48, 49,
    50, 51, 52, 53, 54, 55, 56, 57, 58, 59,
    60, 61, 62, 63, 64, 65, 66, 67, 68, 69,
    70, 71, 72, 73, 74, 75, 76, 77, 78, 79,
    80, 81, 82, 83, 84, 85, 86, 87, 88, 89,
    90, 91, 92, 93, 94, 95, 96, 97, 98, 99,
    100, 101, 102, 103, 104, 105, 106, 107, 108, 109,
    110, 111, 112, 113, 114, 115, 116, 117, 118, 119,
    120, 121, 122, 123, 124, 125, 126, 127, 128, 129,
    130, 131, 132, 133, 134, 135, 136, 137, 138, 139,
    140, 141, 142, 143, 144, 145, 146, 147, 148, 149,
    150, 151, 152, 153, 154, 155, 156, 157, 158, 159,
    160, 161, 162, 163, 164, 165, 166, 167, 168, 169,
    170, 171, 172, 173, 174, 175, 176, 177, 178, 179,
    180, 181, 182, 183, 184, 185, 186, 187, 188, 189,
    190, 191, 192, 193, 194, 195, 196, 197, 198, 199,
    200, 201, 202, 203, 204, 205, 206, 207, 208, 209,
    210, 211, 212, 213, 214, 215, 216, 217, 218, 219,
    220, 221, 222, 223, 224, 225, 226, 227, 228, 229,
    230, 231, 232, 233, 234, 235, 236, 237, 238, 239,
    240, 241, 242, 243, 244, 245, 246, 247, 248, 249,
    250, 251, 252, 253, 254, 255
};

class StringSubject : public CarpSubject
{
public:

    StringSubject(char * s, unsigned int sl)
            {String = s; Length = sl;}

    virtual unsigned short * GetMap(void) {return(Map);}
    virtual CarpSyntax * GetSyntax(void) {return(0);}
    virtual void * GetSubject(unsigned int * sl)
            {*sl = Length; return(String);}
    virtual void * GrowSubject(unsigned int * sl) {return(0);}
    virtual unsigned int NotAtBeginning(void) {return(0);}
    virtual unsigned int NotAtEnd(void) {return(0);}

private:

    char * String;
    unsigned int Length;
};

int main(int argc, char * argv[])
{
    CarpParse * cp;
    CarpRegEx * cre;
    CarpError ce;
    CarpMatch * cm;
    unsigned int ret;
    unsigned int len;

    if (argc < 3)
    {
        printf("usage: test <regex> <string>\n");
        return(1);
    }

    cp = NewCarpParse();
    cre = cp->CompileRegExU((unsigned char *) argv[1], strlen(argv[1]), &ce,
            0);
    if (ce.Error != CARPE_OK)
        printf("error: %d at %d\n", ce.Error, ce.Offset);
    else
    {
        cm = NewCarpMatch(cre);
        StringSubject ss(argv[2], strlen(argv[2]));

        ret = cm->MatchForward(&ss, 0, &len, CARP_EOLCRLF, 0);
        if (ret == MATCH_FAILED)
            printf("match failed\n");
        else
        {
            argv[2][ret + len] = 0;
            printf("match at %d is %s\n", ret, argv[2] + ret);
        }
    }

    return(0);
}