* ap_exr: Add replace(string, from, to) function.

fix comment

* include/: Various doxy markup tweaks.

Limit recursion in ap_expr evaluation to avoid unbounded stack usage * evaluate chains of ||, &&, and string concatenation non-recursively * limit other types of recursion to 20 levels * avoid some string copies if concatenating more than 2 strings

Add string valued expressions to ap_expr, do some API cleanup - add possibility to have expressions that evaluate to a string and not to a boolean value - modify ap_expr_parse_cmd() interface to support this and make it more convenient to use in general - rename AP_EXPR_FLAGS_* to AP_EXPR_FLAG_* for consistency

Add some features to ap_expr for use by mod_include: * a restricted mode that does not allow to bypass request access restrictions * new variables DOCUMENT_URI (alias for REQUEST_URI), LAST_MODIFIED * -A as an alias for -U * an additional data entry in ap_expr_eval_ctx_t for use by the consumer * an extensible ap_expr_exec_ctx() API that allows to use that data entry

Wrap at 80

doxygen improvements

Fix some doxygen warnings

Rename ap_expr's typedef names: ap_expr -> ap_expr_t ap_expr_parse_ctx -> ap_expr_parse_ctx_t ap_expr_eval_ctx -> ap_expr_eval_ctx_t ap_expr_lookup_fn -> ap_expr_lookup_fn_t ap_expr_node_op -> ap_expr_node_op_e

- add -ipmatch, -str(c)match, -fnmatch, -R operators to ap_expr - allow lookup function to pre-parse string constant arguments (used for subnet masks so far) - various bug fixes for binary operators - do strdup() for error messages created on the stack to avoid corruption

Fix another Windows build issue: Add a wrapper around ap_run_expr_lookup with the correct calling convention.

More ap_expr updates: - minor bump for ap_expr_exec_re() introduced in r1037504 - actually commit the changes to allow using backreferences in SetEnvIfExpr - automatically add the correct entries to the Vary-header if the result of an expression evaluation depends on a request header (can be turned off by setting the AP_EXPR_FLAGS_DONT_VARY flag) - set AP_EXPR_FLAGS_DONT_VARY in mod_log_config's conditional logging - fix various off-by-one errors in req_table_func

ap_expr related fixes/enhancements: - implement regex backreferences and make them available for setting envvars in SetEnvIfExpr - implement nested function calls in %-syntax: %{func1:%{func2:arg}} - actually implement evaluation of concatenation operator (oops...) - Fix <If ... > treating an internal error as success

Replace ap_expr with a parser derived from mod_ssl's parser. Make mod_ssl use the new parser. Rework ap_expr's public interface and provide hooks for modules to add variables and functions. The Netware and Windows build files still need to be adjusted

Add "IN" operator to expression parser, to evaluate membership of a list of tokens. Couldn't resist after sf's comment on r1002363! This means expressions like <If %{REQUEST_METHOD} IN GET,HEAD,OPTIONS,...> will work as a drop-in substitute for <Limit> Also fix off-by-one bug in variable evaluation

This is just too easy to not do it: Add an 'expr' authz provider that allows arbitrary expressions in Require lines. The main issue I wanted to fix was that the env provider only allows to check for the existance of an envvar but not the contents.

Fix mod_include potential segfault checking backref from unmatched regexp http://markmail.org/message/jlc7t5edsjujbe37 Patch by rpluem, lars, niq

Declare the callback function NONSTD

Remove ap_expr_clone from the API (same day it was added:-)

Flesh out ap_expr with: * Re-usable parse trees * Canonical string parser function (candidate)

* Add some doxygen stub / stuff

* Prevent multiple "execution" of ap_expr.h contents when included multiple times and allow it to be included by C++ files.

* For AP_MAX_REG_MATCH we need to ensure that httpd.h is there, otherwise we fail to compile exports.c

Thou shalt not let tabs creep in.

Introduce ap_expr expression parser API