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0bce6a1d56
(gnc:format str [binding value]...)
str will contain ${binding} which will be replaced to value.
125 lines
4.6 KiB
Scheme
125 lines
4.6 KiB
Scheme
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;; core-utils.scm
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;;; Guile module for core-utils
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;;;
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;;; Copyright 2006 Chris Shoemaker <c.shoemaker@cox.net>
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;; This program is free software; you can redistribute it and/or
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;; modify it under the terms of the GNU General Public License as
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;; published by the Free Software Foundation; either version 2 of
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;; the License, or (at your option) any later version.
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;;
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;; This program is distributed in the hope that it will be useful,
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;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;; GNU General Public License for more details.
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;;
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;; You should have received a copy of the GNU General Public License
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;; along with this program; if not, contact:
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;;
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;; Free Software Foundation Voice: +1-617-542-5942
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;; 51 Franklin Street, Fifth Floor Fax: +1-617-542-2652
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;; Boston, MA 02110-1301, USA gnu@gnu.org
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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(define-module (gnucash core-utils))
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(eval-when (compile load eval expand)
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(load-extension "libgnucash-guile" "gnc_guile_bindings_init"))
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(use-modules (srfi srfi-26))
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(use-modules (ice-9 match))
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(use-modules (ice-9 i18n))
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(use-modules (ice-9 regex))
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(export N_)
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(export G_)
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(export NG_)
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(export C_)
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(export load-and-reexport)
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(export gnc:string-locale<?)
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(export gnc:string-locale>?)
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(export gnc:version)
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(export gnc:format)
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;; loads modules and re-exports all its public interface into the
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;; current module
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(define-syntax load-and-reexport
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(syntax-rules ()
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((_ (mod ...) ...)
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(begin
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(use-modules (mod ...))
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...
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(module-use! (module-public-interface (current-module))
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(resolve-interface '(mod ...)))
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...))))
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(load-and-reexport (sw_core_utils))
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(define gnc:version (gnc-version))
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;; gettext functions
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(define G_ gnc:gettext)
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(define NG_ gnc:ngettext)
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(define C_ gnc:C-gettext)
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(define N_ identity)
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;; the following will define _ to call gnc:gettext for guile up to
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;; 2.2. It may be removed in the future when minimum guile is 3.0.
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(cond-expand
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(guile-3)
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(guile-2
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(define-public (_ x)
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(issue-deprecation-warning "Using _ to call gettext is disallowed in guile-3 and will be removed in the future. Use G_ instead.")
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(gnc:gettext x))))
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(define gnc:string-locale<? string-locale<?)
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(define gnc:string-locale>? string-locale>?)
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;; Custom unbound-variable exception printer: instead of generic "In
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;; procedure module-lookup: Unbound variable: varname", it will first
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;; search all available modules to identify missing (use-modules) in
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;; header, and offer hint to add it. This is adapted from Guix source.
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(define (known-variable-definition variable)
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(define seen (make-hash-table))
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(let lp ((modules (list (resolve-module '() #f #f #:ensure #f))) (retval '()))
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(match modules
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(() retval)
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(((? (cut hash-ref seen <>)) . tail) (lp tail retval))
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((head tail ...)
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(hash-set! seen head #t)
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(let ((next (append tail (hash-map->list (lambda (name module) module)
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(module-submodules head)))))
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(match (and=> (module-public-interface head)
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(cut module-local-variable <> variable))
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(#f (lp next retval))
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(_ (lp next (cons (module-name head) retval)))))))))
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(define (print-unbound-variable-error port key args default-printer)
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(match args
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((proc message (variable) _ ...)
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(format port "Unbound variable: ~a. " variable)
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(match (known-variable-definition variable)
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(() (format port "It is a typo, or inaccessible in current module."))
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((mod) (format port "Did you forget (use-modules ~s)?" mod))
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(modules (format port "It is defined in one of the following modules\n")
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(for-each (cut format port "(use-modules ~s)\n" <>) modules))))
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(_ (default-printer))))
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(set-exception-printer! 'unbound-variable print-unbound-variable-error)
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;; format.
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(define %regex (make-regexp "[$][{]([[:alnum:]]+)[}]"))
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(define (gnc:format str . bindings)
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(define hash (make-hash-table))
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(define (substitute m)
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(or (hashq-ref hash (string->symbol (match:substring m 1)))
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(warn "invalid identifier" (match:substring m 0))))
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(let lp ((bindings bindings))
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(match bindings
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(() (regexp-substitute/global #f %regex str 'pre substitute 'post))
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(((? symbol? k) v . rest) (hashq-set! hash k (format #f "~a" v)) (lp rest))
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(_ (error "gnc:format syntax error")))))
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