A C program required for portability Post: 28593

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Top Forums Programming A C program required for portability Post 28593 by mbb on Friday 20th of September 2002 12:34:55 PM

09-20-2002

Registered User

Ok. To answer the second part first. To strip out carriage returns from your input file do:

awk '{printf("%s"), $0}' filename > newfile

The awk command should be standard across most Unix O/S.

In HP-UX use the functions: regcomp, regexec. These functions allow you to process regular expressions. In other words you may search a string for a pattern (like the ones you have described).

Sorry I don't have time to explain these functions in depth or write you a little test program, but regexec will point you to where it finds the first match in your line (in a pointer). If you called the function again it will return a pointer to the next pattern in your string. To work out the number of characters between each expression found you would subtract the first pointer value from the second pointer value and so on ...

I do know that you may have portability issues with the regexec and regcomp functions. When my trainee wrote a program and ported it to windows he found that a different library with different function names was required. To make matters worse the windows functions had different rules for regular expressions.
I would not be surprised if you encountered similiar issues between different flavours of Unix.

If portability is an issue you may have to write your own parsing algorithms ...

Sorry I can't be more help but I have run out of time ...

mbb

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LEARN ABOUT PHP

sql_regcase

SQL_REGCASE(3)								 1							    SQL_REGCASE(3)

sql_regcase - Make regular expression for case insensitive match

SYNOPSIS

       string sql_regcase (string  $string)

DESCRIPTION

	Creates a regular expression for a case insensitive match.

       Warning

	      This function has been DEPRECATED as of PHP 5.3.0. Relying on this feature is highly discouraged.

PARAMETERS

	      o $string
		- The input string.

RETURN VALUES

	Returns a valid regular expression which will match $string, ignoring case. This expression is $string with each alphabetic character con-
       verted to a bracket expression; this bracket expression contains that character's uppercase and lowercase  form.  Other	characters  remain
       unchanged.

EXAMPLES

       Example #1

	      sql_regcase(3) example

	      <?php
	      echo sql_regcase("Foo - bar.");
	      ?>

	      The above example will output:

	      [Ff][Oo][Oo] - [Bb][Aa][Rr].

	This can be used to achieve case insensitive pattern matching in products which support only case sensitive regular expressions.

NOTES

       Note

	      As  of PHP 5.3.0, the regex extension is deprecated in favor of the PCRE extension. Calling this function will issue an E_DEPRECATED
	      notice. See the list of differences for help on converting to PCRE.

PHP Documentation Group 													    SQL_REGCASE(3)