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POwhat is wrong with the following code
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copied!<p>The following function gets file offsets from the <strong>rabin_polynomial</strong> structure, opens the <strong>input_file</strong> for md5 fingerprint generation and writes the result to <strong>fpfile</strong></p> <p>My problem is it seems to use the same <strong>chunk_buffer</strong> content some times that it generates similar fingerprints for chunks with different legths.</p> <p>What could be the reason?</p> <p>I have tested the md5 function with other inputs separately and it generates correct digests.</p> <pre><code> int write_rabin_fingerprints_to_binary_file(FILE *fpfile,FILE *input_file, struct rabin_polynomial *head) { struct rabin_polynomial *poly=head; unsigned char fing_print[33]={'\0'}; size_t bytes_read; while(poly != NULL) { char *chunk_buffer; chunk_buffer = (char*) malloc ((poly->length)); bytes_read=fread (chunk_buffer,1, poly->length,input_file); if(bytes_read!=poly->length) { printf("Error reading from%s ",input_file); return -1; } strncpy((char*)fing_print,md5(chunk_buffer).c_str(),32); size_t ret_val=fprintf(fpfile, "%llu\t%lu\t%s\n",poly->start, poly->length,fing_print); if(ret_val == 0) { fprintf(stderr, "Could not write rabin polynomials to file."); return -1; } poly=poly->next_polynomial; free(chunk_buffer); } return 0; } </code></pre> <p>EDIT:</p> <p>I am running this program using visual studio 2010. Could typecasting to <strong>char *</strong> in the <strong>malloc()</strong> line create the problem?</p> <p>The number of bytes read is just as specified in the argument. </p>

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