[sr-dev] git:master: cfg: extended preprocessor directives

[Daniel-Constantin Mierla]

some lines starting with '#' where auto-stripped from git commit, so again:

>>

cfg: extended preprocessor directives

- you can define values for IDs
#!define MYINT 123
#!define MYSTR "xyz"
- defined IDs are replaced at startup, during config parsing, e.g.,:
$var(x) = 100 + MYINT;
- is interpreted as:
$var(x) = 100 + 123;
- you can have multi-line defined IDs
#!define IDLOOP                 $var(i) = 0; \
				while($var(i)<5) { \
					xlog("++++ $var(i)\n"); \
					$var(i) = $var(i) + 1; \
				}
- then in routing block
route {
     ...
     IDLOOP
     ...
}
- new preprocessor directive
#!subst "/regexp/subst/"
- perform substitutions inside the strings of config (note that define is
   replacing only IDs - alphanumeric tokens not enclosed in quotes)
- #!subst offers an easy way to search and replace inside strings before
   cfg parsing. E.g.,:
#!subst "/DBPASSWD/xyz/"
modparam("acc", "db_url", "mysql://user:DBPASSWD@localhost/db")
- will do the substitution of db password in db_url parameter value
- number of allowed defines set to 256
- credits to Andrei for quick hints on ID defines
- notes:
	- multilines defines are reduced to single line, so line counter
	  should be fine
	- column counter goes inside the define value, but you have to omit
	  the \ and CR for the accurate inside-define position



On 4/24/10 12:18 AM, Daniel-Constantin Mierla wrote:
> Module: sip-router
> Branch: master
> Commit: 20cddb28e968d8e0f79a7910d3cc83fa6f40887f
> URL:    http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commit;h=20cddb28e968d8e0f79a7910d3cc83fa6f40887f
>
> Author: Daniel-Constantin Mierla<miconda at gmail.com>
> Committer: Daniel-Constantin Mierla<miconda at gmail.com>
> Date:   Fri Apr 23 23:58:43 2010 +0200
>
> cfg: extended preprocessor directives
>
> - you can define values for IDs
> - defined IDs are replaced at startup, during config parsing, e.g.,:
> $var(x) = 100 + MYINT;
> - is interpreted as:
> $var(x) = 100 + 123;
> - you can have multi-line defined IDs
> 				while($var(i)<5) { \
> 					xlog("++++ $var(i)\n"); \
> 					$var(i) = $var(i) + 1; \
> 				}
> - then in routing block
> route {
>      ...
>      IDLOOP
>      ...
> }
> - new preprocessor directive
> - perform substitutions inside the strings of config (not that define is
>    replacing only IDs - alphanumeric tokens not enclosed in quotes)
> - #!subst offers an easy way to search and replace inside strings before
>    cfg parsing. E.g.,:
> modparam("acc", "db_url", "mysql://user:DBPASSWD@localhost/db")
> - will do the substitution of db password in db_url parameter value
> - number of allowed defines set to 256
> - credits to Andrei for quick hints on ID defines
> - notes:
> 	- multilines defines are reduced to single line, so line counter
> 	  should be fine
> 	- column counter goes inside the define value, but you have to omit
> 	  the \ and CR for the accurate inside-define position
>
> ---
>
>   cfg.lex |  137 +++++++++++++++++++++++++++++++++++++++++++++++++++++----------
>   cfg.y   |    8 ++++
>   ppcfg.c |  116 +++++++++++++++++++++++++++++++++++++++++++++++++++++
>   ppcfg.h |   30 ++++++++++++++
>   4 files changed, 270 insertions(+), 21 deletions(-)
>
> Diff:   http://git.sip-router.org/cgi-bin/gitweb.cgi/sip-router/?a=commitdiff;h=20cddb28e968d8e0f79a7910d3cc83fa6f40887f
>
> _______________________________________________
> sr-dev mailing list
> sr-dev at lists.sip-router.org
> http://lists.sip-router.org/cgi-bin/mailman/listinfo/sr-dev
>    

-- 
Daniel-Constantin Mierla
* http://www.asipto.com/
* http://twitter.com/miconda
* http://www.linkedin.com/in/danielconstantinmierla