Re: [Code] Fastest String Search Algorithm.

[Amit Choudhary]

Bhaskar,

Fuck you.

You are not the owner of linux kernel.

You are a very big idiot.

You really don't know who you are talking to.

You are just assuming that I am a stupid guy without knowing anything about me.

My linux kernel patches are in linux kernel since 2005-2006.

What are your educational and professional qualifications?

I don't think you are from IIT like me, probably you are from a third
grade donation based college.

I have invented a new search engine architecture and implemented it
and it is hosted on sourceforge.

Have you ever invented anything?

World is full of idiots like you from India who think that they are
supreme and other Indians are fools.

Amit



On Sun, Jun 13, 2021, 3:35 PM Bhaskar Chowdhury <unixbhaskar@xxxxxxxxx> wrote:
>
> On 14:00 Sun 13 Jun 2021, Amit Choudhary wrote:
>
> Ahhhhhhhh...
>
> Oh crap! Get off the lawn , kiddo. Do NOT USE THIS PLACE for your obnoxious
> desire.
>
> We don't have time and energy to evaluate some airy-fairy stuff .
>
> How do you know we will ever bother to think about "include your code"?? Let
> alone other factor...huh...you are living in fool's paradise ...meh... look
> like your head is filled with lots of preconceived dogma....where have you got
> those?? Heck..
>
> Your intention is not wise...this mailing list solely exist for people
> interested in Linux and only in Linux Kernel. Period.
>
> IOW , PLEASE DO NOT BOTHER US.
>
> ~Bhaskar
>
> >Hi All,
> >
> >I have invented a new string search algorithm. It has performed better
> >than strstr(), Boyer-Moore, and KPM algorithms.
> >
> >But I am not sending my code so that my algorithm gets included in linux kernel.
> >
> >I am sending this code because linux kernel mailing list is in public
> >domain and getting indexed by search engines. So, people can see this
> >algo if they search for fastest string search algorithm on web.
> >
> >Code:
> >
> >===================================================================================
> >
> >// Choudhary string search algorithm
> >static char * choudhary_string_search_algorithm(char *text, char *pattern)
> >{
> >
> >#define false 0
> >#define true 1
> >#define ALPHABET_SIZE 256
> >
> >    int i = 0;
> >    int end_index = 0;
> >    int not_found = false;
> >
> >    char pattern_char[ALPHABET_SIZE] = {0};
> >
> >    int text_len = strlen(text);
> >    int pattern_len = strlen(pattern);
> >
> >    int pi_44 = pattern_len - 1;
> >    int pi_34 = (3 * pattern_len) / 4;
> >    int pi_24 = pattern_len / 2;
> >    int pi_14 = pattern_len / 4;
> >
> >    int last_failed_index = -1;
> >
> >    // preprocessing
> >    for (i = 0; i < pattern_len; i++) {
> >        pattern_char[(int)(pattern[i])] = 1;
> >    }
> >
> >    // now search
> >    for (i = 0; i < text_len; i++) {
> >
> >        if ((text_len - i) < pattern_len) {
> >            return NULL;
> >            //return -1;
> >        }
> >
> >        if (pattern[pi_44] != text[i + pi_44]) {
> >
> >            last_failed_index = pi_44;
> >
> >            // this character doesn't appear in pattern, so skip
> >            if (pattern_char[(int)(text[i + pi_44])] == 0) {
> >                i = i + pi_44;
> >            }
> >
> >            continue;
> >
> >        } else if (pattern[pi_34] != text[i + pi_34]) {
> >
> >            last_failed_index = pi_34;
> >
> >            // this character doesn't appear in pattern, so skip
> >            if (pattern_char[(int)(text[i + pi_34])] == 0) {
> >                i = i + pi_34;
> >            }
> >
> >            continue;
> >
> >        } else if (pattern[pi_24] != text[i + pi_24]) {
> >
> >            last_failed_index = pi_24;
> >
> >            // this character doesn't appear in pattern, so skip
> >            if (pattern_char[(int)(text[i + pi_24])] == 0) {
> >                i = i + pi_24;
> >            }
> >
> >            continue;
> >
> >        } else if (pattern[pi_14] != text[i + pi_14]) {
> >
> >            last_failed_index = pi_14;
> >
> >            // this character doesn't appear in pattern, so skip
> >            if (pattern_char[(int)(text[i + pi_14])] == 0) {
> >                i = i + pi_14;
> >            }
> >
> >            continue;
> >
> >        } // end of if-else.. block
> >
> >        // compare with character at last failed index.
> >        if (last_failed_index >= 0) {
> >
> >            if (pattern[last_failed_index] != text[i + last_failed_index]) {
> >                continue;
> >            }
> >
> >        }
> >
> >        if (pattern[0] == text[i]) {
> >
> >            //full_pattern_search = full_pattern_search + 1;
> >            end_index = i + pi_44;
> >            not_found = false;
> >            int index = 0;
> >
> >            for (index = i; index <= end_index; index++) {
> >                if (text[index] != pattern[index - i]) {
> >                    last_failed_index = index - i;
> >                    not_found = true;
> >                    break;
> >                }
> >            } // end of inner for loop
> >
> >            if (not_found == false) { // match is found
> >                return (text + i);
> >                //return i;
> >            } else if (pattern_char[(int)(text[index])] == 0) {
> >                i = index;
> >            }
> >        } // end of if pattern[0]
> >
> >    } // end of outer for loop
> >
> >    return NULL;
> >    //return -1;
> >
> >} // end of choudhary_string_search_algorithm
> >
> >===================================================================================
> >
> >Regards,
> >Amit