mirror of
https://git.savannah.gnu.org/git/guile.git
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339 lines
9.7 KiB
C
339 lines
9.7 KiB
C
/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002 Free Software Foundation
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <errno.h>
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#include "libguile/_scm.h"
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#include "libguile/async.h"
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#include "libguile/smob.h"
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#include "libguile/alist.h"
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#include "libguile/debug.h"
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#include "libguile/hashtab.h"
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#include "libguile/hash.h"
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#include "libguile/ports.h"
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#include "libguile/root.h"
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#include "libguile/weaks.h"
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#include "libguile/validate.h"
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#include "libguile/srcprop.h"
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/* {Source Properties}
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*
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* Properties of source list expressions.
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* Five of these have special meaning and optimized storage:
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*
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* filename string The name of the source file.
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* copy list A copy of the list expression.
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* line integer The source code line number.
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* column integer The source code column number.
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* breakpoint boolean Sets a breakpoint on this form.
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*
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* Most properties above can be set by the reader.
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*
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*/
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SCM_GLOBAL_SYMBOL (scm_sym_filename, "filename");
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SCM_GLOBAL_SYMBOL (scm_sym_copy, "copy");
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SCM_GLOBAL_SYMBOL (scm_sym_line, "line");
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SCM_GLOBAL_SYMBOL (scm_sym_column, "column");
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SCM_GLOBAL_SYMBOL (scm_sym_breakpoint, "breakpoint");
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scm_t_bits scm_tc16_srcprops;
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static scm_t_srcprops_chunk *srcprops_chunklist = 0;
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static scm_t_srcprops *srcprops_freelist = 0;
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static SCM
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srcprops_mark (SCM obj)
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{
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scm_gc_mark (SRCPROPFNAME (obj));
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scm_gc_mark (SRCPROPCOPY (obj));
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return SRCPROPPLIST (obj);
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}
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static size_t
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srcprops_free (SCM obj)
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{
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*((scm_t_srcprops **) SCM_SMOB_DATA (obj)) = srcprops_freelist;
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srcprops_freelist = (scm_t_srcprops *) SCM_SMOB_DATA (obj);
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return 0; /* srcprops_chunks are not freed until leaving guile */
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}
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static int
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srcprops_print (SCM obj, SCM port, scm_print_state *pstate)
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{
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int writingp = SCM_WRITINGP (pstate);
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scm_puts ("#<srcprops ", port);
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SCM_SET_WRITINGP (pstate, 1);
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scm_iprin1 (scm_srcprops_to_plist (obj), port, pstate);
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SCM_SET_WRITINGP (pstate, writingp);
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scm_putc ('>', port);
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return 1;
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}
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int
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scm_c_source_property_breakpoint_p (SCM form)
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{
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SCM obj = scm_whash_lookup (scm_source_whash, form);
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return SRCPROPSP (obj) && SRCPROPBRK (obj);
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}
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SCM
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scm_make_srcprops (long line, int col, SCM filename, SCM copy, SCM plist)
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{
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register scm_t_srcprops *ptr;
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SCM_CRITICAL_SECTION_START;
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if ((ptr = srcprops_freelist) != NULL)
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srcprops_freelist = *(scm_t_srcprops **)ptr;
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else
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{
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size_t i;
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scm_t_srcprops_chunk *mem;
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size_t n = sizeof (scm_t_srcprops_chunk)
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+ sizeof (scm_t_srcprops) * (SRCPROPS_CHUNKSIZE - 1);
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SCM_SYSCALL (mem = (scm_t_srcprops_chunk *) scm_malloc (n));
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if (mem == NULL)
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scm_memory_error ("srcprops");
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scm_gc_register_collectable_memory (mem, n, "srcprops");
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mem->next = srcprops_chunklist;
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srcprops_chunklist = mem;
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ptr = &mem->srcprops[0];
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for (i = 1; i < SRCPROPS_CHUNKSIZE - 1; ++i)
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*(scm_t_srcprops **)&ptr[i] = &ptr[i + 1];
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*(scm_t_srcprops **)&ptr[SRCPROPS_CHUNKSIZE - 1] = 0;
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srcprops_freelist = (scm_t_srcprops *) &ptr[1];
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}
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ptr->pos = SRCPROPMAKPOS (line, col);
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ptr->fname = filename;
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ptr->copy = copy;
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ptr->plist = plist;
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SCM_CRITICAL_SECTION_END;
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SCM_RETURN_NEWSMOB (scm_tc16_srcprops, ptr);
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}
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SCM
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scm_srcprops_to_plist (SCM obj)
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{
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SCM plist = SRCPROPPLIST (obj);
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if (!SCM_UNBNDP (SRCPROPCOPY (obj)))
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plist = scm_acons (scm_sym_copy, SRCPROPCOPY (obj), plist);
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if (!SCM_UNBNDP (SRCPROPFNAME (obj)))
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plist = scm_acons (scm_sym_filename, SRCPROPFNAME (obj), plist);
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plist = scm_acons (scm_sym_column, scm_from_int (SRCPROPCOL (obj)), plist);
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plist = scm_acons (scm_sym_line, scm_from_int (SRCPROPLINE (obj)), plist);
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plist = scm_acons (scm_sym_breakpoint, scm_from_bool (SRCPROPBRK (obj)), plist);
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return plist;
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}
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SCM_DEFINE (scm_source_properties, "source-properties", 1, 0, 0,
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(SCM obj),
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"Return the source property association list of @var{obj}.")
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#define FUNC_NAME s_scm_source_properties
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{
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SCM p;
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SCM_VALIDATE_NIM (1, obj);
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if (SCM_MEMOIZEDP (obj))
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obj = SCM_MEMOIZED_EXP (obj);
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else if (!scm_is_pair (obj))
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SCM_WRONG_TYPE_ARG (1, obj);
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p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL);
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if (SRCPROPSP (p))
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return scm_srcprops_to_plist (p);
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else
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/* list from set-source-properties!, or SCM_EOL for not found */
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return p;
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}
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#undef FUNC_NAME
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/* Perhaps this procedure should look through an alist
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and try to make a srcprops-object...? */
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SCM_DEFINE (scm_set_source_properties_x, "set-source-properties!", 2, 0, 0,
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(SCM obj, SCM plist),
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"Install the association list @var{plist} as the source property\n"
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"list for @var{obj}.")
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#define FUNC_NAME s_scm_set_source_properties_x
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{
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SCM handle;
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SCM_VALIDATE_NIM (1, obj);
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if (SCM_MEMOIZEDP (obj))
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obj = SCM_MEMOIZED_EXP (obj);
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else if (!scm_is_pair (obj))
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SCM_WRONG_TYPE_ARG(1, obj);
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handle = scm_hashq_create_handle_x (scm_source_whash, obj, plist);
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SCM_SETCDR (handle, plist);
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return plist;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_source_property, "source-property", 2, 0, 0,
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(SCM obj, SCM key),
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"Return the source property specified by @var{key} from\n"
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"@var{obj}'s source property list.")
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#define FUNC_NAME s_scm_source_property
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{
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SCM p;
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SCM_VALIDATE_NIM (1, obj);
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if (SCM_MEMOIZEDP (obj))
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obj = SCM_MEMOIZED_EXP (obj);
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else if (!scm_is_pair (obj))
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SCM_WRONG_TYPE_ARG (1, obj);
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p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL);
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if (!SRCPROPSP (p))
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goto plist;
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if (scm_is_eq (scm_sym_breakpoint, key)) p = scm_from_bool (SRCPROPBRK (p));
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else if (scm_is_eq (scm_sym_line, key)) p = scm_from_int (SRCPROPLINE (p));
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else if (scm_is_eq (scm_sym_column, key)) p = scm_from_int (SRCPROPCOL (p));
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else if (scm_is_eq (scm_sym_filename, key)) p = SRCPROPFNAME (p);
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else if (scm_is_eq (scm_sym_copy, key)) p = SRCPROPCOPY (p);
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else
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{
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p = SRCPROPPLIST (p);
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plist:
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p = scm_assoc (key, p);
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return (SCM_NIMP (p) ? SCM_CDR (p) : SCM_BOOL_F);
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}
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return SCM_UNBNDP (p) ? SCM_BOOL_F : p;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_set_source_property_x, "set-source-property!", 3, 0, 0,
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(SCM obj, SCM key, SCM datum),
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"Set the source property of object @var{obj}, which is specified by\n"
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"@var{key} to @var{datum}. Normally, the key will be a symbol.")
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#define FUNC_NAME s_scm_set_source_property_x
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{
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scm_whash_handle h;
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SCM p;
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SCM_VALIDATE_NIM (1, obj);
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if (SCM_MEMOIZEDP (obj))
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obj = SCM_MEMOIZED_EXP (obj);
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else if (!scm_is_pair (obj))
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SCM_WRONG_TYPE_ARG (1, obj);
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h = scm_whash_get_handle (scm_source_whash, obj);
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if (SCM_WHASHFOUNDP (h))
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p = SCM_WHASHREF (scm_source_whash, h);
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else
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{
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h = scm_whash_create_handle (scm_source_whash, obj);
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p = SCM_EOL;
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}
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if (scm_is_eq (scm_sym_breakpoint, key))
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{
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if (SRCPROPSP (p))
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{
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if (scm_is_false (datum))
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CLEARSRCPROPBRK (p);
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else
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SETSRCPROPBRK (p);
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}
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else
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{
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SCM sp = scm_make_srcprops (0, 0, SCM_UNDEFINED, SCM_UNDEFINED, p);
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SCM_WHASHSET (scm_source_whash, h, sp);
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if (scm_is_false (datum))
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CLEARSRCPROPBRK (sp);
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else
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SETSRCPROPBRK (sp);
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}
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}
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else if (scm_is_eq (scm_sym_line, key))
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{
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if (SRCPROPSP (p))
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SETSRCPROPLINE (p, scm_to_int (datum));
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else
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SCM_WHASHSET (scm_source_whash, h,
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scm_make_srcprops (scm_to_int (datum), 0,
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SCM_UNDEFINED, SCM_UNDEFINED, p));
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}
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else if (scm_is_eq (scm_sym_column, key))
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{
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if (SRCPROPSP (p))
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SETSRCPROPCOL (p, scm_to_int (datum));
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else
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SCM_WHASHSET (scm_source_whash, h,
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scm_make_srcprops (0, scm_to_int (datum),
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SCM_UNDEFINED, SCM_UNDEFINED, p));
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}
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else if (scm_is_eq (scm_sym_filename, key))
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{
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if (SRCPROPSP (p))
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SRCPROPFNAME (p) = datum;
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else
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SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, datum, SCM_UNDEFINED, p));
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}
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else if (scm_is_eq (scm_sym_copy, key))
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{
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if (SRCPROPSP (p))
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SRCPROPCOPY (p) = datum;
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else
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SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, SCM_UNDEFINED, datum, p));
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}
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else
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{
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if (SRCPROPSP (p))
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SRCPROPPLIST (p) = scm_acons (key, datum, SRCPROPPLIST (p));
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else
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SCM_WHASHSET (scm_source_whash, h, scm_acons (key, datum, p));
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}
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return SCM_UNSPECIFIED;
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}
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#undef FUNC_NAME
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void
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scm_init_srcprop ()
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{
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scm_tc16_srcprops = scm_make_smob_type ("srcprops", 0);
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scm_set_smob_mark (scm_tc16_srcprops, srcprops_mark);
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scm_set_smob_free (scm_tc16_srcprops, srcprops_free);
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scm_set_smob_print (scm_tc16_srcprops, srcprops_print);
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scm_source_whash = scm_make_weak_key_hash_table (scm_from_int (2047));
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scm_c_define ("source-whash", scm_source_whash);
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#include "libguile/srcprop.x"
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}
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void
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scm_finish_srcprop ()
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{
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register scm_t_srcprops_chunk *ptr = srcprops_chunklist, *next;
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size_t n= sizeof (scm_t_srcprops_chunk)
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+ sizeof (scm_t_srcprops) * (SRCPROPS_CHUNKSIZE - 1);
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while (ptr)
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{
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next = ptr->next;
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scm_gc_unregister_collectable_memory (ptr, n, "srcprops");
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free ((char *) ptr);
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ptr = next;
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}
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}
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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