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POHow to link main function with header file and create it's dll file?
 

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  1. POHow to link main function with header file and create it's dll file?
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    <p>I am very beginner to work with dll and linking various file.</p> <p>I just know write main() function and all other in same .c file and run it.</p> <p>I have one program which works for pattern matching. It takes the string and check whether it exist in entire text string or not. like</p> <p>Text string: my name is john</p> <p>string to be matched: name</p> <p>Answer: Yes</p> <p>main function is like this:</p> <pre><code>int main(int argc, const char *argv[]) { char target[200]; char *ch = target; char pattern[20]; int i,k,count,l; printf("\nEnter the string: \n"); fgets(target,100,stdin); printf("Enter the string to be matched: \n"); fgets(pattern,20,stdin); l=strlen(pattern); i = kmp(target, strlen(target)-1, pattern, strlen(pattern)-1); //printf("I is : %d\n",i); if (i == -1) puts("False"); else puts("True"); getch(); return 0; } </code></pre> <p>Which calls function kmp() and get result back. We can also print the result in kmp() function. kmp() function is as follow:</p> <pre><code>int kmp(char *target, int tsize, char *pattern, int psize) { int i; int *pi = compute_prefix_function(pattern, psize); int k = -1; if (!pi) return -1; for (i = 0; i &lt; tsize; i++) { while (k &gt; -1 &amp;&amp; pattern[k+1] != target[i]) k = pi[k]; if (target[i] == pattern[k+1]) k++; if (k == psize - 1) { free(pi); return i-k; } } free(pi); return -1; } </code></pre> <p>In kmp we call <strong>compute_prefix_function(pattern, psize);</strong> which is as below:</p> <pre><code>int *compute_prefix_function(char *pattern, int psize) { int k = -1; int i = 1; int *pi = malloc(sizeof(int)*psize); if (!pi) return NULL; pi[0] = k; for (i = 1; i &lt; psize; i++) { while (k &gt; -1 &amp;&amp; pattern[k+1] != pattern[i]) k = pi[k]; if (pattern[i] == pattern[k+1]) k++; pi[i] = k; } return pi; } </code></pre> <p>Header files need to be called: </p> <pre><code>#include &lt;stdio.h&gt; #include &lt;stdlib.h&gt; #include &lt;string.h&gt; </code></pre> <p>What I want to do is:</p> <p><em><strong>Creating an implementations in a dll/shared library format. essentially, the dll should have a function extension which take a string and return a bool saying if the string exists or not.</em></strong></p> <p>For that which function I need to put in .c file and header file and how to create .dll file for this?</p> <p>I am using windows 7, VS 2010 and C programming.</p> <p>Please explain me step by step.</p>
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    1. USProgramming_crazy
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    1. CODo I undestand correctly? You wan the kmp() function to be in a DLL so you can call it from the main() program the same as it is now. But you want to have the kmp() code in a DLL and not in the main.c source?
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      1. POHow to link main function with header file and create it's dll file?
      1. USNicholaz
    2. COYes Nicholaz, you right. I want to know how to do that and how to create dll for that!
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      1. USProgramming_crazy
 

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