/* Copyright (C) 1995,1996,1997,1998,1999,2000,2001,2002, 2006 Free Software Foundation * * This library 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 2.1 of the License, or (at your option) any later version. * * This library 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 this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ #include #include "libguile/_scm.h" #include "libguile/async.h" #include "libguile/smob.h" #include "libguile/alist.h" #include "libguile/debug.h" #include "libguile/hashtab.h" #include "libguile/hash.h" #include "libguile/ports.h" #include "libguile/root.h" #include "libguile/weaks.h" #include "libguile/validate.h" #include "libguile/srcprop.h" /* {Source Properties} * * Properties of source list expressions. * Five of these have special meaning and optimized storage: * * filename string The name of the source file. * copy list A copy of the list expression. * line integer The source code line number. * column integer The source code column number. * breakpoint boolean Sets a breakpoint on this form. * * Most properties above can be set by the reader. * */ SCM_GLOBAL_SYMBOL (scm_sym_filename, "filename"); SCM_GLOBAL_SYMBOL (scm_sym_copy, "copy"); SCM_GLOBAL_SYMBOL (scm_sym_line, "line"); SCM_GLOBAL_SYMBOL (scm_sym_column, "column"); SCM_GLOBAL_SYMBOL (scm_sym_breakpoint, "breakpoint"); scm_t_bits scm_tc16_srcprops; static scm_t_srcprops_chunk *srcprops_chunklist = 0; static scm_t_srcprops *srcprops_freelist = 0; static SCM srcprops_mark (SCM obj) { scm_gc_mark (SRCPROPFNAME (obj)); scm_gc_mark (SRCPROPCOPY (obj)); return SRCPROPPLIST (obj); } static size_t srcprops_free (SCM obj) { *((scm_t_srcprops **) SCM_SMOB_DATA (obj)) = srcprops_freelist; srcprops_freelist = (scm_t_srcprops *) SCM_SMOB_DATA (obj); return 0; /* srcprops_chunks are not freed until leaving guile */ } static int srcprops_print (SCM obj, SCM port, scm_print_state *pstate) { int writingp = SCM_WRITINGP (pstate); scm_puts ("#', port); return 1; } int scm_c_source_property_breakpoint_p (SCM form) { SCM obj = scm_whash_lookup (scm_source_whash, form); return SRCPROPSP (obj) && SRCPROPBRK (obj); } SCM scm_make_srcprops (long line, int col, SCM filename, SCM copy, SCM plist) { register scm_t_srcprops *ptr; SCM_CRITICAL_SECTION_START; if ((ptr = srcprops_freelist) != NULL) srcprops_freelist = *(scm_t_srcprops **)ptr; else { size_t i; scm_t_srcprops_chunk *mem; size_t n = sizeof (scm_t_srcprops_chunk) + sizeof (scm_t_srcprops) * (SRCPROPS_CHUNKSIZE - 1); SCM_SYSCALL (mem = (scm_t_srcprops_chunk *) scm_malloc (n)); if (mem == NULL) scm_memory_error ("srcprops"); scm_gc_register_collectable_memory (mem, n, "srcprops"); mem->next = srcprops_chunklist; srcprops_chunklist = mem; ptr = &mem->srcprops[0]; for (i = 1; i < SRCPROPS_CHUNKSIZE - 1; ++i) *(scm_t_srcprops **)&ptr[i] = &ptr[i + 1]; *(scm_t_srcprops **)&ptr[SRCPROPS_CHUNKSIZE - 1] = 0; srcprops_freelist = (scm_t_srcprops *) &ptr[1]; } ptr->pos = SRCPROPMAKPOS (line, col); ptr->fname = filename; ptr->copy = copy; ptr->plist = plist; SCM_CRITICAL_SECTION_END; SCM_RETURN_NEWSMOB (scm_tc16_srcprops, ptr); } SCM scm_srcprops_to_plist (SCM obj) { SCM plist = SRCPROPPLIST (obj); if (!SCM_UNBNDP (SRCPROPCOPY (obj))) plist = scm_acons (scm_sym_copy, SRCPROPCOPY (obj), plist); if (!SCM_UNBNDP (SRCPROPFNAME (obj))) plist = scm_acons (scm_sym_filename, SRCPROPFNAME (obj), plist); plist = scm_acons (scm_sym_column, scm_from_int (SRCPROPCOL (obj)), plist); plist = scm_acons (scm_sym_line, scm_from_int (SRCPROPLINE (obj)), plist); plist = scm_acons (scm_sym_breakpoint, scm_from_bool (SRCPROPBRK (obj)), plist); return plist; } SCM_DEFINE (scm_source_properties, "source-properties", 1, 0, 0, (SCM obj), "Return the source property association list of @var{obj}.") #define FUNC_NAME s_scm_source_properties { SCM p; SCM_VALIDATE_NIM (1, obj); if (SCM_MEMOIZEDP (obj)) obj = SCM_MEMOIZED_EXP (obj); else if (!scm_is_pair (obj)) SCM_WRONG_TYPE_ARG (1, obj); p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL); if (SRCPROPSP (p)) return scm_srcprops_to_plist (p); else /* list from set-source-properties!, or SCM_EOL for not found */ return p; } #undef FUNC_NAME /* Perhaps this procedure should look through an alist and try to make a srcprops-object...? */ SCM_DEFINE (scm_set_source_properties_x, "set-source-properties!", 2, 0, 0, (SCM obj, SCM plist), "Install the association list @var{plist} as the source property\n" "list for @var{obj}.") #define FUNC_NAME s_scm_set_source_properties_x { SCM handle; SCM_VALIDATE_NIM (1, obj); if (SCM_MEMOIZEDP (obj)) obj = SCM_MEMOIZED_EXP (obj); else if (!scm_is_pair (obj)) SCM_WRONG_TYPE_ARG(1, obj); handle = scm_hashq_create_handle_x (scm_source_whash, obj, plist); SCM_SETCDR (handle, plist); return plist; } #undef FUNC_NAME SCM_DEFINE (scm_source_property, "source-property", 2, 0, 0, (SCM obj, SCM key), "Return the source property specified by @var{key} from\n" "@var{obj}'s source property list.") #define FUNC_NAME s_scm_source_property { SCM p; SCM_VALIDATE_NIM (1, obj); if (SCM_MEMOIZEDP (obj)) obj = SCM_MEMOIZED_EXP (obj); else if (!scm_is_pair (obj)) SCM_WRONG_TYPE_ARG (1, obj); p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL); if (!SRCPROPSP (p)) goto plist; if (scm_is_eq (scm_sym_breakpoint, key)) p = scm_from_bool (SRCPROPBRK (p)); else if (scm_is_eq (scm_sym_line, key)) p = scm_from_int (SRCPROPLINE (p)); else if (scm_is_eq (scm_sym_column, key)) p = scm_from_int (SRCPROPCOL (p)); else if (scm_is_eq (scm_sym_filename, key)) p = SRCPROPFNAME (p); else if (scm_is_eq (scm_sym_copy, key)) p = SRCPROPCOPY (p); else { p = SRCPROPPLIST (p); plist: p = scm_assoc (key, p); return (SCM_NIMP (p) ? SCM_CDR (p) : SCM_BOOL_F); } return SCM_UNBNDP (p) ? SCM_BOOL_F : p; } #undef FUNC_NAME SCM_DEFINE (scm_set_source_property_x, "set-source-property!", 3, 0, 0, (SCM obj, SCM key, SCM datum), "Set the source property of object @var{obj}, which is specified by\n" "@var{key} to @var{datum}. Normally, the key will be a symbol.") #define FUNC_NAME s_scm_set_source_property_x { scm_whash_handle h; SCM p; SCM_VALIDATE_NIM (1, obj); if (SCM_MEMOIZEDP (obj)) obj = SCM_MEMOIZED_EXP (obj); else if (!scm_is_pair (obj)) SCM_WRONG_TYPE_ARG (1, obj); h = scm_whash_get_handle (scm_source_whash, obj); if (SCM_WHASHFOUNDP (h)) p = SCM_WHASHREF (scm_source_whash, h); else { h = scm_whash_create_handle (scm_source_whash, obj); p = SCM_EOL; } if (scm_is_eq (scm_sym_breakpoint, key)) { if (SRCPROPSP (p)) { if (scm_is_false (datum)) CLEARSRCPROPBRK (p); else SETSRCPROPBRK (p); } else { SCM sp = scm_make_srcprops (0, 0, SCM_UNDEFINED, SCM_UNDEFINED, p); SCM_WHASHSET (scm_source_whash, h, sp); if (scm_is_false (datum)) CLEARSRCPROPBRK (sp); else SETSRCPROPBRK (sp); } } else if (scm_is_eq (scm_sym_line, key)) { if (SRCPROPSP (p)) SETSRCPROPLINE (p, scm_to_int (datum)); else SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (scm_to_int (datum), 0, SCM_UNDEFINED, SCM_UNDEFINED, p)); } else if (scm_is_eq (scm_sym_column, key)) { if (SRCPROPSP (p)) SETSRCPROPCOL (p, scm_to_int (datum)); else SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, scm_to_int (datum), SCM_UNDEFINED, SCM_UNDEFINED, p)); } else if (scm_is_eq (scm_sym_filename, key)) { if (SRCPROPSP (p)) SRCPROPFNAME (p) = datum; else SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, datum, SCM_UNDEFINED, p)); } else if (scm_is_eq (scm_sym_copy, key)) { if (SRCPROPSP (p)) SRCPROPCOPY (p) = datum; else SCM_WHASHSET (scm_source_whash, h, scm_make_srcprops (0, 0, SCM_UNDEFINED, datum, p)); } else { if (SRCPROPSP (p)) SRCPROPPLIST (p) = scm_acons (key, datum, SRCPROPPLIST (p)); else SCM_WHASHSET (scm_source_whash, h, scm_acons (key, datum, p)); } return SCM_UNSPECIFIED; } #undef FUNC_NAME void scm_init_srcprop () { scm_tc16_srcprops = scm_make_smob_type ("srcprops", 0); scm_set_smob_mark (scm_tc16_srcprops, srcprops_mark); scm_set_smob_free (scm_tc16_srcprops, srcprops_free); scm_set_smob_print (scm_tc16_srcprops, srcprops_print); scm_source_whash = scm_make_weak_key_hash_table (scm_from_int (2047)); scm_c_define ("source-whash", scm_source_whash); #include "libguile/srcprop.x" } void scm_finish_srcprop () { register scm_t_srcprops_chunk *ptr = srcprops_chunklist, *next; size_t n= sizeof (scm_t_srcprops_chunk) + sizeof (scm_t_srcprops) * (SRCPROPS_CHUNKSIZE - 1); while (ptr) { next = ptr->next; scm_gc_unregister_collectable_memory (ptr, n, "srcprops"); free ((char *) ptr); ptr = next; } } /* Local Variables: c-file-style: "gnu" End: */