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Diffstat (limited to 'libguile/feature.c')
-rw-r--r-- | libguile/feature.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/libguile/feature.c b/libguile/feature.c new file mode 100644 index 000000000..709bc0465 --- /dev/null +++ b/libguile/feature.c @@ -0,0 +1,120 @@ +/* Copyright 1995-1996,1998-2004,2006-2007,2009,2011,2013,2018 + Free Software Foundation, Inc. + + This file is part of Guile. + + Guile is free software: you can redistribute it and/or modify it + under the terms of the GNU Lesser General Public License as published + by the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + Guile is distributed in the hope that it will be useful, but WITHOUT + ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public + License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with Guile. If not, see + <https://www.gnu.org/licenses/>. */ + + + + +#ifdef HAVE_CONFIG_H +# include <config.h> +#endif + +#include <string.h> + +#include "fluids.h" +#include "gsubr.h" +#include "modules.h" +#include "pairs.h" +#include "strings.h" +#include "symbols.h" +#include "variable.h" + +#include "feature.h" + + + + +SCM scm_program_arguments_fluid; + +static SCM features_var; + +void +scm_add_feature (const char *str) +{ + SCM old = SCM_VARIABLE_REF (features_var); + SCM new = scm_cons (scm_from_utf8_symbol (str), old); + SCM_VARIABLE_SET (features_var, new); +} + + + +SCM_DEFINE (scm_program_arguments, "program-arguments", 0, 0, 0, + (), + "@deffnx {Scheme Procedure} command-line\n" + "Return the list of command line arguments passed to Guile, as a list of\n" + "strings. The list includes the invoked program name, which is usually\n" + "@code{\"guile\"}, but excludes switches and parameters for command line\n" + "options like @code{-e} and @code{-l}.") +#define FUNC_NAME s_scm_program_arguments +{ + return scm_fluid_ref (scm_program_arguments_fluid); +} +#undef FUNC_NAME + +/* Set the value returned by program-arguments, given ARGC and ARGV. + + If FIRST is non-zero, make it the first element; we do this in + situations where other code (like getopt) has parsed out a few + arguments, but we still want the script name to be the first + element. */ +void +scm_set_program_arguments (int argc, char **argv, char *first) +{ + SCM args = scm_makfromstrs (argc, argv); + if (first) + args = scm_cons (scm_from_locale_string (first), args); + scm_fluid_set_x (scm_program_arguments_fluid, args); +} + +SCM_DEFINE (scm_set_program_arguments_scm, "set-program-arguments", 1, 0, 0, + (SCM lst), + "Set the command line arguments to be returned by\n" + "@code{program-arguments} (and @code{command-line}). @var{lst}\n" + "should be a list of strings, the first of which is the program\n" + "name (either a script name, or just @code{\"guile\"}).\n" + "\n" + "Program arguments are held in a fluid and therefore have a\n" + "separate value in each Guile thread. Neither the list nor the\n" + "strings within it are copied, so should not be modified later.") +#define FUNC_NAME s_scm_set_program_arguments_scm +{ + return scm_fluid_set_x (scm_program_arguments_fluid, lst); +} +#undef FUNC_NAME + + + + +void +scm_init_feature() +{ + scm_program_arguments_fluid = scm_make_fluid (); + + features_var = scm_c_define ("*features*", SCM_EOL); +#ifndef _Windows + scm_add_feature("system"); +#endif +#ifndef GO32 + scm_add_feature("char-ready?"); +#endif +#if SCM_USE_PTHREAD_THREADS + scm_add_feature ("threads"); +#endif + +#include "feature.x" +} |