diff --git a/libguile/srcprop.c b/libguile/srcprop.c new file mode 100644 index 000000000..94021bae0 --- /dev/null +++ b/libguile/srcprop.c @@ -0,0 +1,364 @@ +/* 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 +#include "_scm.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 scm_i_copy; +static SCM scm_i_breakpoint, scm_i_line, scm_i_column; +static SCM scm_i_filename; + +long tc16_srcprops; +static scm_srcprops_chunk *srcprops_chunklist = 0; +static scm_srcprops *srcprops_freelist = 0; + +#ifdef __STDC__ +static SCM +marksrcprops (SCM obj) +#else +static SCM +marksrcprops (obj) + SCM obj; +#endif +{ + SCM_SETGC8MARK (obj); + scm_gc_mark (SRCPROPFNAME (obj)); + scm_gc_mark (SRCPROPCOPY (obj)); + return SRCPROPPLIST (obj); +} + +#ifdef __STDC__ +static scm_sizet +freesrcprops (SCM obj) +#else +static scm_sizet +freesrcprops (obj) + SCM obj; +#endif +{ + *((scm_srcprops **) SCM_CDR (obj)) = srcprops_freelist; + srcprops_freelist = (scm_srcprops *) SCM_CDR (obj); + return 0; /* srcprops_chunks are not freed until leaving guile */ +} + +#ifdef __STDC__ +static int +prinsrcprops (SCM obj, SCM port, int writing) +#else +static int +prinsrcprops (obj, port, writing) + SCM obj; + SCM port; + int writing; +#endif +{ + scm_gen_puts (scm_regular_string, "#', port); + return 1; +} + +static scm_smobfuns srcpropssmob = +{marksrcprops, freesrcprops, prinsrcprops, 0}; + +#ifdef __STDC__ +SCM +_scm_make_srcprops (int line, int col, SCM filename, SCM copy, SCM plist) +#else +SCM +_scm_make_srcprops (line, col, filename, copy, plist) + int line; + int col; + SCM filename; + SCM copy; + SCM plist; +#endif +{ + register SCM ans; + register scm_srcprops *ptr; + SCM_DEFER_INTS; + if ((ptr = srcprops_freelist) != NULL) + srcprops_freelist = *(scm_srcprops **)ptr; + else + { + int i; + scm_srcprops_chunk *mem; + scm_sizet n = sizeof (scm_srcprops_chunk) + + sizeof (scm_srcprops) * (SRCPROPS_CHUNKSIZE - 1); + SCM_SYSCALL (mem = (scm_srcprops_chunk *) malloc (n)); + SCM_ASSERT (mem, SCM_UNDEFINED, SCM_NALLOC, "srcprops"); + scm_mallocated += n; + mem->next = srcprops_chunklist; + srcprops_chunklist = mem; + ptr = &mem->srcprops[0]; + for (i = 1; i < SRCPROPS_CHUNKSIZE - 1; ++i) + *(scm_srcprops **)&ptr[i] = &ptr[i + 1]; + *(scm_srcprops **)&ptr[SRCPROPS_CHUNKSIZE - 1] = 0; + srcprops_freelist = (scm_srcprops *) &ptr[1]; + } + SCM_NEWCELL (ans); + SCM_CAR (ans) = tc16_srcprops; + ptr->pos = SRCPROPMAKPOS (line, col); + ptr->fname = filename; + ptr->copy = copy; + ptr->plist = plist; + SCM_CDR (ans) = (SCM) ptr; + SCM_ALLOW_INTS; + return ans; +} + +#ifdef __STDC__ +SCM +scm_srcprops_to_plist (SCM obj) +#else +SCM +scm_srcprops_to_plist (obj) + SCM obj; +#endif +{ + SCM plist = SRCPROPPLIST (obj); + if (!SCM_UNBNDP (SRCPROPCOPY (obj))) + plist = scm_acons (scm_i_copy, SRCPROPCOPY (obj), plist); + if (!SCM_UNBNDP (SRCPROPFNAME (obj))) + plist = scm_acons (scm_i_filename, SRCPROPFNAME (obj), plist); + plist = scm_acons (scm_i_column, SCM_MAKINUM (SRCPROPCOL (obj)), plist); + plist = scm_acons (scm_i_line, SCM_MAKINUM (SRCPROPLINE (obj)), plist); + plist = scm_acons (scm_i_breakpoint, SRCPROPBRK (obj), plist); + return plist; +} + +SCM_PROC (s_source_properties, "source-properties", 1, 0, 0, scm_source_properties); +#ifdef __STDC__ +SCM +scm_source_properties (SCM obj) +#else +SCM +scm_source_properties (obj) + SCM obj; +#endif +{ + SCM p; + if (SCM_MEMOIZEDP (obj)) + obj = SCM_MEMOEXP (obj); + p = scm_hashq_ref (scm_source_whash, obj, (SCM) NULL); + if (p != (SCM) NULL && SRCPROPSP (p)) + return scm_srcprops_to_plist (p); + return SCM_EOL; +} + +/* Perhaps this procedure should look through an alist + and try to make a srcprops-object...? */ +SCM_PROC (s_set_source_properties_x, "set-source-properties!", 2, 0, 0, scm_set_source_properties_x); +#ifdef __STDC__ +SCM +scm_set_source_properties_x (SCM obj, SCM plist) +#else +SCM +scm_set_source_properties_x (obj, plist) + SCM obj; + SCM plist; +#endif +{ + SCM handle; + if (SCM_MEMOIZEDP (obj)) + obj = SCM_MEMOEXP (obj); + handle = scm_hashq_create_handle_x (scm_source_whash, obj, plist); + SCM_SETCDR (handle, plist); + return plist; +} + +SCM_PROC (s_source_property, "source-property", 2, 0, 0, scm_source_property); +#ifdef __STDC__ +SCM +scm_source_property (SCM obj, SCM key) +#else +SCM +scm_source_property (obj, key) + SCM obj; + SCM key; +#endif +{ + SCM p; + if (SCM_MEMOIZEDP (obj)) + obj = SCM_MEMOEXP (obj); + p = scm_hashq_ref (scm_source_whash, obj, SCM_EOL); + if (SCM_IMP (p) || !SRCPROPSP (p)) + goto plist; + if (scm_i_breakpoint == key) p = SRCPROPBRK (p); + else if (scm_i_line == key) p = SCM_MAKINUM (SRCPROPLINE (p)); + else if (scm_i_column == key) p = SCM_MAKINUM (SRCPROPCOL (p)); + else if (scm_i_filename == key) p = SRCPROPFNAME (p); + else if (scm_i_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; +} + +SCM_PROC (s_set_source_property_x, "set-source-property!", 3, 0, 0, scm_set_source_property_x); +#ifdef __STDC__ +SCM +scm_set_source_property_x (SCM obj, SCM key, SCM datum) +#else +SCM +scm_set_source_property_x (obj, key, datum) + SCM obj; + SCM key; + SCM datum; +#endif +{ + scm_whash_handle h; + SCM p; + if (SCM_MEMOIZEDP (obj)) + obj = SCM_MEMOEXP (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_i_breakpoint == key) + if (SCM_FALSEP (datum)) + CLEARSRCPROPBRK (SCM_NIMP (p) && SRCPROPSP (p) + ? p + : SCM_WHASHSET (scm_source_whash, h, + _scm_make_srcprops (0, 0, SCM_UNDEFINED, + SCM_UNDEFINED, p))); + else + SETSRCPROPBRK (SCM_NIMP (p) && SRCPROPSP (p) + ? p + : SCM_WHASHSET (scm_source_whash, h, + _scm_make_srcprops (0, 0, SCM_UNDEFINED, + SCM_UNDEFINED, p))); + else if (scm_i_line == key) + { + if (SCM_NIMP (p) && SRCPROPSP (p)) + SETSRCPROPLINE (p, datum); + else + SCM_WHASHSET (scm_source_whash, h, + _scm_make_srcprops (datum, 0, SCM_UNDEFINED, SCM_UNDEFINED, p)); + } + else if (scm_i_column == key) + { + if (SCM_NIMP (p) && SRCPROPSP (p)) + SETSRCPROPCOL (p, datum); + else + SCM_WHASHSET (scm_source_whash, h, + _scm_make_srcprops (0, datum, SCM_UNDEFINED, SCM_UNDEFINED, p)); + } + else if (scm_i_filename == key) + { + if (SCM_NIMP (p) && SRCPROPSP (p)) + SRCPROPFNAME (p) = datum; + else + SCM_WHASHSET (scm_source_whash, h, _scm_make_srcprops (0, 0, datum, SCM_UNDEFINED, p)); + } + else if (scm_i_filename == key) + { + if (SCM_NIMP (p) && SRCPROPSP (p)) + SRCPROPCOPY (p) = datum; + else + SCM_WHASHSET (scm_source_whash, h, _scm_make_srcprops (0, 0, SCM_UNDEFINED, datum, p)); + } + else + SCM_WHASHSET (scm_source_whash, h, scm_acons (key, datum, p)); + return SCM_UNSPECIFIED; +} + +#ifdef __STDC__ +void +scm_init_srcprop (void) +#else +void +scm_init_srcprop () +#endif +{ + tc16_srcprops = scm_newsmob (&srcpropssmob); + scm_source_whash = scm_make_weak_key_hash_table (SCM_MAKINUM (255)); + + scm_i_filename = SCM_CAR (scm_sysintern ("filename", SCM_UNDEFINED)); + scm_i_copy = SCM_CAR (scm_sysintern ("copy", SCM_UNDEFINED)); + scm_i_line = SCM_CAR (scm_sysintern ("line", SCM_UNDEFINED)); + scm_i_column = SCM_CAR (scm_sysintern ("column", SCM_UNDEFINED)); + scm_i_breakpoint = SCM_CAR (scm_sysintern ("breakpoint", SCM_UNDEFINED)); + + scm_sysintern ("source-whash", scm_source_whash); +#include "srcprop.x" +} + +void +scm_finish_srcprop () +{ + register scm_srcprops_chunk *ptr = srcprops_chunklist, *next; + while (ptr) + { + next = ptr->next; + free ((char *) ptr); + scm_mallocated -= sizeof (scm_srcprops_chunk) + + sizeof (scm_srcprops) * (SRCPROPS_CHUNKSIZE - 1); + } +}