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author | Mikael Djurfeldt <djurfeldt@nada.kth.se> | 1996-08-20 17:06:04 +0000 |
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committer | Mikael Djurfeldt <djurfeldt@nada.kth.se> | 1996-08-20 17:06:04 +0000 |
commit | 1a413ab902eb6587425acd60c5e6b43565dc6d11 (patch) | |
tree | eccf87794d26536404459c1778e70774683378df /libguile/options.c | |
parent | 627ecda7cad82ffc49c721881771b0fb0c1d00fb (diff) | |
download | guile-1a413ab902eb6587425acd60c5e6b43565dc6d11.tar.gz |
* * options.c: New file: handling of run time options.
* options.h: New file: handling of run time options.
Diffstat (limited to 'libguile/options.c')
-rw-r--r-- | libguile/options.c | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/libguile/options.c b/libguile/options.c new file mode 100644 index 000000000..9f3eeb676 --- /dev/null +++ b/libguile/options.c @@ -0,0 +1,157 @@ +/* Copyright (C) 1995,1996 Mikael Djurfeldt + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2, or (at your option) + * any later version. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this software; see the file COPYING. If not, write to + * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + * + * As a special exception, the Free Software Foundation gives permission + * for additional uses of the text contained in its release of GUILE. + * + * The exception is that, if you link the GUILE library with other files + * to produce an executable, this does not by itself cause the + * resulting executable to be covered by the GNU General Public License. + * Your use of that executable is in no way restricted on account of + * linking the GUILE library code into it. + * + * This exception does not however invalidate any other reasons why + * the executable file might be covered by the GNU General Public License. + * + * This exception applies only to the code released by the + * Free Software Foundation under the name GUILE. If you copy + * code from other Free Software Foundation releases into a copy of + * GUILE, as the General Public License permits, the exception does + * not apply to the code that you add in this way. To avoid misleading + * anyone as to the status of such modified files, you must delete + * this exception notice from them. + * + * If you write modifications of your own for GUILE, it is your choice + * whether to permit this exception to apply to your modifications. + * If you do not wish that, delete this exception notice. + * + * The author can be reached at djurfeldt@nada.kth.se + * Mikael Djurfeldt, SANS/NADA KTH, 10044 STOCKHOLM, SWEDEN + */ + + +#include <stdio.h> +#include "_scm.h" + + + +/* {Run-time options} + * + * This is the basic interface for low-level configuration of the + * Guile library. It is used for configuring the reader, evaluator, + * printer and debugger. + */ + +#ifdef __STDC__ +SCM +scm_change_options (SCM new_mode, scm_option options[], int n, char *s) +#else +SCM +scm_change_options (new_mode, options, n, s) + SCM new_mode; + scm_option options[]; + int n; + char *s; +#endif +{ + int i; + SCM old = SCM_EOL; + for (i = 0; i < n; ++i) + switch (options[i].type) + { + case SCM_OPTION_BOOLEAN: + if (options[i].val) + old = scm_cons (options[i].sym, old); + break; + case SCM_OPTION_INTEGER: + old = scm_cons2 (options[i].sym, + SCM_MAKINUM (options[i].val), + old); + } + if (!SCM_UNBNDP (new_mode)) + { + int *flags; + flags = (int *) scm_must_malloc (n * sizeof (int), "mode buffer"); + for (i = 0; i < n; ++i) + if (options[i].type == SCM_OPTION_BOOLEAN) + flags[i] = 0; + else + flags[i] = options[i].val; + while (SCM_NNULLP (new_mode)) + { + SCM_ASSERT (SCM_NIMP (new_mode) && SCM_CONSP (new_mode), + new_mode, + SCM_ARG1, + s); + for (i = 0; i < n; ++i) + if (SCM_CAR (new_mode) == options[i].sym) + switch (options[i].type) + { + case SCM_OPTION_BOOLEAN: + flags[i] = 1; + goto cont; + case SCM_OPTION_INTEGER: + new_mode = SCM_CDR (new_mode); + SCM_ASSERT (SCM_NIMP (new_mode) + && SCM_CONSP (new_mode) + && SCM_INUMP (SCM_CAR (new_mode)), + new_mode, + SCM_ARG1, + s); + flags[i] = SCM_INUM (SCM_CAR (new_mode)); + goto cont; + } +#ifndef RECKLESS + scm_must_free ((char *) flags); + scm_wta (SCM_CAR (new_mode), "Unknown mode flag", s); +#endif + cont: + new_mode = SCM_CDR (new_mode); + } + for (i = 0; i < n; ++i) options[i].val = flags[i]; + scm_must_free ((char *) flags); + } + return old; +} + +#ifdef __STDC__ +void +scm_init_opts (SCM (*func) (SCM), scm_option options[], int n) +#else +void +scm_init_opts (func, options, n) + SCM (*func) (SCM); + scm_option options[]; + int n; +#endif +{ + int i; + + for (i = 0; i < n; ++i) + options[i].sym = SCM_CAR (scm_sysintern (options[i].name, SCM_UNDEFINED)); + func (SCM_UNDEFINED); +} + +#ifdef __STDC__ +void +scm_init_options (void) +#else +void +scm_init_options () +#endif +{ +#include "options.x" +} |