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News about PCRE releases |
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nigel |
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Release 3.5 15-Aug-01 |
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1. The configuring system has been upgraded to use later versions of autoconf |
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and libtool. By default it builds both a shared and a static library if the OS |
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supports it. You can use --disable-shared or --disable-static on the configure |
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command if you want only one of them. |
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2. The pcretest utility is now installed along with pcregrep because it is |
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useful for users (to test regexs) and by doing this, it automatically gets |
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relinked by libtool. The documentation has been turned into a man page, so |
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there are now .1, .txt, and .html versions in /doc. |
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3. Upgrades to pcregrep: |
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(i) Added long-form option names like gnu grep. |
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(ii) Added --help to list all options with an explanatory phrase. |
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(iii) Added -r, --recursive to recurse into sub-directories. |
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(iv) Added -f, --file to read patterns from a file. |
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4. Added --enable-newline-is-cr and --enable-newline-is-lf to the configure |
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script, to force use of CR or LF instead of \n in the source. On non-Unix |
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systems, the value can be set in config.h. |
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5. The limit of 200 on non-capturing parentheses is a _nesting_ limit, not an |
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absolute limit. Changed the text of the error message to make this clear, and |
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likewise updated the man page. |
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6. The limit of 99 on the number of capturing subpatterns has been removed. |
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The new limit is 65535, which I hope will not be a "real" limit. |
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nigel |
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Release 3.3 01-Aug-00 |
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There is some support for UTF-8 character strings. This is incomplete and |
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experimental. The documentation describes what is and what is not implemented. |
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Otherwise, this is just a bug-fixing release. |
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nigel |
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Release 3.0 01-Feb-00 |
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nigel |
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nigel |
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1. A "configure" script is now used to configure PCRE for Unix systems. It |
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builds a Makefile, a config.h file, and the pcre-config script. |
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2. PCRE is built as a shared library by default. |
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3. There is support for POSIX classes such as [:alpha:]. |
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5. There is an experimental recursion feature. |
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nigel |
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---------------------------------------------------------------------------- |
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IMPORTANT FOR THOSE UPGRADING FROM VERSIONS BEFORE 2.00 |
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Please note that there has been a change in the API such that a larger |
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ovector is required at matching time, to provide some additional workspace. |
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The new man page has details. This change was necessary in order to support |
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some of the new functionality in Perl 5.005. |
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IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.00 |
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Another (I hope this is the last!) change has been made to the API for the |
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pcre_compile() function. An additional argument has been added to make it |
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possible to pass over a pointer to character tables built in the current |
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locale by pcre_maketables(). To use the default tables, this new arguement |
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should be passed as NULL. |
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IMPORTANT FOR THOSE UPGRADING FROM VERSION 2.05 |
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Yet another (and again I hope this really is the last) change has been made |
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to the API for the pcre_exec() function. An additional argument has been |
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added to make it possible to start the match other than at the start of the |
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subject string. This is important if there are lookbehinds. The new man |
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page has the details, but you just want to convert existing programs, all |
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you need to do is to stick in a new fifth argument to pcre_exec(), with a |
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value of zero. For example, change |
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pcre_exec(pattern, extra, subject, length, options, ovec, ovecsize) |
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to |
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pcre_exec(pattern, extra, subject, length, 0, options, ovec, ovecsize) |
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