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cceb922d06
* m4/module.c (m4__module_open): Instead of calling lt_dlopenext right away, use the preload hint first incase path searching has been disabled by POSIXLY_CORRECT. Otherwise fallback to a manual path search to override libltdl's algorithm. * m4/m4module.h: Adjust. * m4/path.c (FILE_SUFFIXES): Order to try suffixes in our path search algorithm. (NO_SUFFIXES): Alternatively, how to to search a path without adding file suffixes. (m4_path_search): Add a new suffixes parameter defaulting to NO_SUFFIXES. Adjust all callers. (m4_load_filename): New generic load function that tries to open a matched file first as a module, and if that fails fall back to as (possibly frozen) m4 input. (m4_fopen): New function with close on exec functionality. * modules/m4.c (include, sinclude): Use m4_load_filename to overload these builtins to work with modules too. * modules/load.c (load): Removed this builtin. * src/main.c: Remove Dynamic loading features section, and M4MODPATH support. (long_options): Remove "load-module", "unload-module" and "module-directory" options. (OPTSTRING): Remove 'M' and 'm' options. (process_file): Use m4_load_filename to support module names on the command line. * Makefile.am (TESTS_ENVIRONMENT): No need for abs_top_builddir any more. * doc/m4.texinfo: Update examples. (Dynamic loading features, Load): Removed. (Command line files): Describe how non-option arguments are treated to try to find a matching macro file or dso. (Include): Describe additional dso loading features if a suitable text file cannot be found. (Modules): Updated. * tests/builtins.at, tests/m4.in, tests/modules.at, tests/options.at: Adjust test cases and calling conventions to new semantics. * NEWS: Updated.
127 lines
3.4 KiB
C
127 lines
3.4 KiB
C
/* GNU m4 -- A simple macro processor
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Copyright (C) 2000, 2005, 2006, 2007, 2008 Free Software
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Foundation, Inc.
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This file is part of GNU M4.
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GNU M4 is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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GNU M4 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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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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/* This module needs private symbols, and may not compile correctly if
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m4private.h isn't included. */
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#include "m4private.h"
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/* Rename exported symbols for dlpreload()ing. */
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#define m4_builtin_table load_LTX_m4_builtin_table
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#define m4_macro_table load_LTX_m4_macro_table
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/* Maintain each of the builtins implemented in this modules along
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with their details in a single table for easy maintenance.
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function macros blind side minargs maxargs */
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#define builtin_functions \
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BUILTIN (m4modules, false, false, false, 0, 0 ) \
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BUILTIN (refcount, false, true, false, 1, 1 ) \
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BUILTIN (unload, false, true, false, 1, 1 ) \
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/* Generate prototypes for each builtin handler function. */
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#define BUILTIN(handler, macros, blind, side, min, max) M4BUILTIN (handler)
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builtin_functions
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#undef BUILTIN
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/* Generate a table for mapping m4 symbol names to handler functions. */
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m4_builtin m4_builtin_table[] =
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{
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#define BUILTIN(handler, macros, blind, side, min, max) \
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M4BUILTIN_ENTRY (handler, #handler, macros, blind, side, min, max)
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builtin_functions
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#undef BUILTIN
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{ NULL, NULL, 0, 0, 0 },
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};
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/* A table for mapping m4 symbol names to simple expansion text. */
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m4_macro m4_macro_table[] =
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{
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/* name text min max */
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{ "__load__", "", 0, 0 },
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{ NULL, NULL, 0, 0 },
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};
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/* This module cannot be safely unloaded from memory, incase the unload
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is triggered by the unload builtin, and the module is removed while
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unload is in progress. */
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M4INIT_HANDLER (load)
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{
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const char *err = m4_module_makeresident (module);
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if (err)
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m4_error (context, 0, 0, NULL, _("cannot make module `%s' resident: %s"),
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m4_get_module_name (module), err);
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}
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/* Loading an external module at runtime.
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The following functions provide the implementation for each
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of the m4 builtins declared in `m4_builtin_table[]' above. */
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/**
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* m4modules()
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**/
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M4BUILTIN_HANDLER (m4modules)
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{
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/* The expansion of this builtin is a comma separated list of
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loaded modules. */
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m4_module *module = m4__module_next (NULL);
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if (module)
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do
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{
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m4_shipout_string (context, obs, m4_get_module_name (module), SIZE_MAX,
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true);
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if ((module = m4__module_next (module)))
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obstack_1grow (obs, ',');
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}
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while (module);
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}
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/**
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* refcount(module)
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**/
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M4BUILTIN_HANDLER (refcount)
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{
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m4_module *module = m4__module_find (M4ARG (1));
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m4_shipout_int (obs, module ? m4_module_refcount (module) : 0);
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}
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/**
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* unload(MODULE-NAME)
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**/
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M4BUILTIN_HANDLER (unload)
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{
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/* Remove all builtins and macros installed by the named module,
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and then unload the module from memory entirely. */
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m4_module_unload (context, M4ARG(1), obs);
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}
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