X-Git-Url: https://git.gag.com/?p=fw%2Faltos;a=blobdiff_plain;f=src%2Fscheme%2Fao_scheme_atom.c;fp=src%2Fscheme%2Fao_scheme_atom.c;h=0000000000000000000000000000000000000000;hp=2a568ed9bcf257a24892906a38b6a86f1760aa0f;hb=f26cc1a677f577da533425a15485fcaa24626b23;hpb=4b52fc6eea9a478cb3dd42dcd32c92838df39734 diff --git a/src/scheme/ao_scheme_atom.c b/src/scheme/ao_scheme_atom.c deleted file mode 100644 index 2a568ed9..00000000 --- a/src/scheme/ao_scheme_atom.c +++ /dev/null @@ -1,298 +0,0 @@ -/* - * Copyright © 2016 Keith Packard - * - * 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; version 2 of the License. - * - * 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 program; if not, write to the Free Software Foundation, Inc., - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. - */ - -#include "ao_scheme.h" - -static int name_size(char *name) -{ - return sizeof(struct ao_scheme_atom) + strlen(name) + 1; -} - -static int atom_size(void *addr) -{ - struct ao_scheme_atom *atom = addr; - if (!atom) - return 0; - return name_size(atom->name); -} - -static void atom_mark(void *addr) -{ - MDBG_MOVE("mark atom %s\n", ((struct ao_scheme_atom *) addr)->name); - (void) addr; -} - -static void atom_move(void *addr) -{ - (void) addr; -} - -const struct ao_scheme_type ao_scheme_atom_type = { - .mark = atom_mark, - .size = atom_size, - .move = atom_move, - .name = "atom" -}; - -struct ao_scheme_atom *ao_scheme_atoms; - -static struct ao_scheme_atom * -ao_scheme_atom_find(const char *name) -{ - struct ao_scheme_atom *atom; - -#ifdef ao_builtin_atoms - if (!ao_scheme_atoms) - ao_scheme_atoms = ao_scheme_poly_atom(ao_builtin_atoms); -#endif - for (atom = ao_scheme_atoms; atom; atom = ao_scheme_poly_atom(atom->next)) { - if (!strcmp(atom->name, name)) - return atom; - } - return NULL; -} - -#ifdef AO_SCHEME_MAKE_CONST - -#define AO_SCHEME_BUILTIN_SYNTAX_ATOMS -#include "ao_scheme_builtin.h" -#undef AO_SCHEME_BUILTIN_SYNTAX_ATOMS - -static void -ao_scheme_atom_mark_syntax(void) -{ - unsigned a; - for (a = 0; a < sizeof(syntax_atoms)/sizeof(syntax_atoms[0]); a++) { - struct ao_scheme_atom *atom = ao_scheme_atom_find(syntax_atoms[a]); - if (atom) - ao_scheme_mark_memory(&ao_scheme_atom_type, atom); - } -} - -#else -#define ao_scheme_atom_mark_syntax() -#endif - -void -ao_scheme_atom_move(void) -{ - struct ao_scheme_atom *atom; - ao_scheme_move_memory(&ao_scheme_atom_type, (void **) (void *) &ao_scheme_atoms); - for (atom = ao_scheme_atoms; atom; atom = ao_scheme_poly_atom(atom->next)) { - if (!ao_scheme_is_pool_addr(atom)) { - MDBG_DO(printf("atom out of pool %s\n", atom->name)); - break; - } - MDBG_DO(printf("move atom %s\n", atom->name)); - ao_scheme_poly_move(&atom->next, 0); - } -} - -void -ao_scheme_atom_check_references(void) -{ - struct ao_scheme_atom *atom; - ao_poly *prev = NULL; - - ao_scheme_atom_mark_syntax(); - for (atom = ao_scheme_atoms; atom; atom = ao_scheme_poly_atom(atom->next)) { - if (!ao_scheme_marked(atom)) { - MDBG_DO(printf("unreferenced atom %s\n", atom->name)); - if (prev) - *prev = atom->next; - else - ao_scheme_atoms = ao_scheme_poly_atom(atom->next); - } else - prev = &atom->next; - } -} - -static void -ao_scheme_atom_init(struct ao_scheme_atom *atom, char *name) -{ - if (atom) { - atom->type = AO_SCHEME_ATOM; - strcpy(atom->name, name); - atom->next = ao_scheme_atom_poly(ao_scheme_atoms); - ao_scheme_atoms = atom; - } -} - -struct ao_scheme_atom * -ao_scheme_string_to_atom(struct ao_scheme_string *string) -{ - struct ao_scheme_atom *atom = ao_scheme_atom_find(string->val); - - if (atom) - return atom; - ao_scheme_string_stash(string); - atom = ao_scheme_alloc(name_size(string->val)); - string = ao_scheme_string_fetch(); - ao_scheme_atom_init(atom, string->val); - return atom; -} - -struct ao_scheme_atom * -ao_scheme_atom_intern(char *name) -{ - struct ao_scheme_atom *atom = ao_scheme_atom_find(name); - if (atom) - return atom; - - atom = ao_scheme_alloc(name_size(name)); - ao_scheme_atom_init(atom, name); - return atom; -} - -ao_poly * -ao_scheme_atom_ref(ao_poly atom, struct ao_scheme_frame **frame_ref) -{ - ao_poly *ref; - struct ao_scheme_frame *frame; - - for (frame = ao_scheme_frame_current; frame; frame = ao_scheme_poly_frame(frame->prev)) { - ref = ao_scheme_frame_ref(frame, atom); - if (ref) { - if (frame_ref) - *frame_ref = frame; - return ref; - } - } - ref = ao_scheme_frame_ref(ao_scheme_frame_global, atom); - if (ref) - if (frame_ref) - *frame_ref = ao_scheme_frame_global; - return ref; -} - -ao_poly -ao_scheme_atom_get(ao_poly atom) -{ - ao_poly *ref = ao_scheme_atom_ref(atom, NULL); - -#ifdef ao_builtin_frame - if (!ref) - ref = ao_scheme_frame_ref(ao_scheme_poly_frame(ao_builtin_frame), atom); -#endif - if (ref) - return *ref; - return ao_scheme_error(AO_SCHEME_UNDEFINED, "undefined atom %s", ao_scheme_poly_atom(atom)->name); -} - -ao_poly -ao_scheme_atom_def(ao_poly atom, ao_poly val) -{ - struct ao_scheme_frame *frame; - ao_poly *ref = ao_scheme_atom_ref(atom, &frame); - - if (ref) { - if (frame == ao_scheme_frame_current) - return ao_scheme_error(AO_SCHEME_REDEFINED, "attempt to redefine atom %s", ao_scheme_poly_atom(atom)->name); - *ref = val; - return val; - } - return ao_scheme_frame_add(ao_scheme_frame_current ? ao_scheme_frame_current : ao_scheme_frame_global, atom, val); -} - -void -ao_scheme_atom_write(FILE *out, ao_poly a, bool write) -{ - struct ao_scheme_atom *atom = ao_scheme_poly_atom(a); - (void) write; - fprintf(out, "%s", atom->name); -} - -ao_poly -ao_scheme_do_symbolp(struct ao_scheme_cons *cons) -{ - return ao_scheme_do_typep(_ao_scheme_atom_symbol3f, AO_SCHEME_ATOM, cons); -} - -ao_poly -ao_scheme_do_set(struct ao_scheme_cons *cons) -{ - ao_poly atom; - ao_poly val; - ao_poly *ref; - - if (!ao_scheme_parse_args(_ao_scheme_atom_set, cons, - AO_SCHEME_ATOM|AO_SCHEME_ARG_RET_POLY, &atom, - AO_SCHEME_POLY, &val, - AO_SCHEME_ARG_END)) - return AO_SCHEME_NIL; - - ref = ao_scheme_atom_ref(atom, NULL); - - if (!ref) - return ao_scheme_error(AO_SCHEME_UNDEFINED, "%v: undefined atom %v", - _ao_scheme_atom_set, atom); - *ref = val; - return val; -} - -ao_poly -ao_scheme_do_def(struct ao_scheme_cons *cons) -{ - ao_poly atom; - ao_poly val; - - if (!ao_scheme_parse_args(_ao_scheme_atom_set, cons, - AO_SCHEME_ATOM|AO_SCHEME_ARG_RET_POLY, &atom, - AO_SCHEME_POLY, &val, - AO_SCHEME_ARG_END)) - return AO_SCHEME_NIL; - return ao_scheme_atom_def(atom, val); -} - -ao_poly -ao_scheme_do_setq(struct ao_scheme_cons *cons) -{ - ao_poly atom; - ao_poly val; - ao_poly p; - - if (!ao_scheme_parse_args(_ao_scheme_atom_set21, cons, - AO_SCHEME_ATOM|AO_SCHEME_ARG_RET_POLY, &atom, - AO_SCHEME_POLY, &val, - AO_SCHEME_ARG_END)) - return AO_SCHEME_NIL; - if (!ao_scheme_atom_ref(atom, NULL)) - return ao_scheme_error(AO_SCHEME_INVALID, "%v: symbol %v not defined", - _ao_scheme_atom_set21, atom); - /* - * Build the macro return -- `(set (quote ,atom) ,val) - */ - ao_scheme_poly_stash(cons->cdr); - p = ao_scheme_cons(atom, AO_SCHEME_NIL); - p = ao_scheme_cons(_ao_scheme_atom_quote, p); - p = ao_scheme_cons(p, ao_scheme_poly_fetch()); - return ao_scheme_cons(_ao_scheme_atom_set, p); -} - -#ifdef AO_SCHEME_FEATURE_UNDEF -ao_poly -ao_scheme_do_undef(struct ao_scheme_cons *cons) -{ - ao_poly atom; - - if (!ao_scheme_parse_args(_ao_scheme_atom_set, cons, - AO_SCHEME_ATOM|AO_SCHEME_ARG_RET_POLY, &atom, - AO_SCHEME_ARG_END)) - return AO_SCHEME_NIL; - return ao_scheme_frame_del(ao_scheme_frame_global, atom); -} -#endif