Attachment 174401 Details for Bug 258021 – simple C++ program that demonstrated g++32 dependency on GLIBC_2.3.4

simple C++ program that demonstrated g++32 dependency on GLIBC_2.3.4

regexec2.cxx (text/plain), 1.95 KB, created by Sev Binello on 2007-08-27 21:07:58 UTC

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Creator: Sev Binello

Created: 2007-08-27 21:07:58 UTC

Size: 1.95 KB

patch

obsolete

>/*
> *  qegrep.c
> *
> *  compares its standard input against the regular
> *  expression given (on command line), and prints
> *  out those lines matching that RE.
> *
> *
> *  Created by Mij <mij@bitchx.it> on Mon Dec 29 2003.
> *  Original source file available on http://mij.oltrelinux.com/devel/unixprg/
> */
>
> /* max error message length */
>#define MAX_ERR_LENGTH 80
> /* max length of a line of text from stdin */
>#define MAX_TXT_LENGTH 600
>
>#include <stdio.h>
> /* for --ansi (see off_t in regex.h) */
>#include <sys/types.h>
> /* for index(): */
>#include <string.h>
>#include <regex.h>
>
>
>int main(int argc, char *argv[]) {
>     /* will contain the regular expression */
>    regex_t myre;
>    int err;
>    char err_msg[MAX_ERR_LENGTH];
>    char text[MAX_TXT_LENGTH];
>    
>     /* safe check on cmd line args */
>    if ( argc < 2 || argc > 2 ) {
>        printf("Usage:\n\tqegrep 'RE' < file\n\tOR\n\techo \"string\" | qegrep 'RE'\n");
>        return 1;
>    }
>    
>     /* compiles the RE. If this step fails, reveals what's wrong with the RE */
>    if ( (err = regcomp(&myre, argv[1], REG_EXTENDED)) != 0 ) {
>        regerror(err, &myre, err_msg, MAX_ERR_LENGTH);
>        printf("Error analyzing regular expression '%s': %s.\n", argv[1], err_msg);
>        return 1;
>    }
>    
>     /* "executes" the RE against the text taken from stdin */
>    while ( fgets(text, MAX_TXT_LENGTH, stdin) != NULL ) {
>         /* we rely on the fact that text contains newline chars */
>        *(index(text, '\n')) = '\0';
>	//NOTE - replacing if (regexec .....) with if (1) will eliminate dependency on GLIBC_2.3.4 
>        //when using g++32
>
>	// if (1)
>       if (  (regexec(&myre, text, 0, NULL, 0)) == 0 ) puts(text);
>        else if ( err != REG_NOMATCH ) {
>             /* this is when errors have been encountered */
>            regerror(err, &myre, err_msg, MAX_ERR_LENGTH);
>            return 2;
>        }
>    } 
>
>     /* meaningless here. Useful in many other situations. */
>    regfree(&myre);
>    
>    return 0;
>}

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Attachments on bug 258021: 174401