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# -*- tcl -*-
# -- $Id: writer_peg.tcl,v 1.1 2005/09/28 04:51:22 andreas_kupries Exp $ ---
#
# PAGE plugin - writer - PEG ~ Canonical PE Grammar
#
# ### ### ### ######### ######### #########
## Imported API
# -----------------+--
# page_wdata | Access to processed input stream.
# -----------------+--
# page_info | Reporting to the user.
# page_warning |
# page_error |
# -----------------+--
# page_log_error | Reporting of internals.
# page_log_warning |
# page_log_info |
# -----------------+--
# ### ### ### ######### ######### #########
## Exported API
# -----------------+--
# page_wfeature | Query for special plugin features page might wish to use.
# page_wtime | Activate collection of timing statistics.
# page_wgettime | Return the collected timing statistics.
# page_wlabel | User readable label for the plugin.
# page_whelp | Doctools help text for plugin.
# page_woptions | Options understood by plugin.
# page_wconfigure | Option (re)configuration.
# page_wrun | Generate output from data per plugin configuration and hardwiring.
# -----------------+--
# ### ### ### ######### ######### #########
## Requisites
package require page::gen::peg::canon
package require struct::tree ; # Data structure.
global usec
global timed
set timed 0
# ### ### ### ######### ######### #########
## Implementation of exported API
proc page_wlabel {} {
return {Canonical PEG}
}
proc page_wfeature {key} {
return [string eq $key timeable]
}
proc page_wtime {} {
global timed
set timed 1
return
}
proc page_wgettime {} {
global usec
return $usec
}
proc page_whelp {} {
return {}
}
proc page_woptions {} {
return {}
}
proc page_wconfigure {option value} {
return -code error "Cannot set value of unknown option \"$option\""
}
proc page_wrun {chan data} {
global timed usec
page_log_info "writer/peg/run/"
if {$timed} {
set usec [lindex [time {
::struct::tree ::tree deserialize $data
page::gen::peg::canon ::tree $chan
}] 0] ; #{}
} else {
::struct::tree ::tree deserialize $data
page::gen::peg::canon ::tree $chan
}
page_log_info "writer/peg/run/ok"
::tree destroy
return
}
# ### ### ### ######### ######### #########
## Internal helper code.
# ### ### ### ######### ######### #########
## Initialization
package provide page::writer::peg 0.1
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