99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
#include "equalhash.h"
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fltype_t *get_type(value_t t)
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{
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fltype_t *ft;
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if (issymbol(t)) {
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ft = ((symbol_t *)ptr(t))->type;
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if (ft != NULL)
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return ft;
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}
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void **bp = equalhash_bp(&TypeTable, (void *)t);
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if (*bp != HT_NOTFOUND)
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return *bp;
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int align,
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isarray = (iscons(t) && car_(t) == arraysym && iscons(cdr_(t)));
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size_t sz;
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if (isarray && !iscons(cdr_(cdr_(t)))) {
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// special case: incomplete array type
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sz = 0;
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} else {
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sz = ctype_sizeof(t, &align);
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}
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ft = (fltype_t *)malloc(sizeof(fltype_t));
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ft->type = t;
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if (issymbol(t)) {
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ft->numtype = sym_to_numtype(t);
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((symbol_t *)ptr(t))->type = ft;
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} else {
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ft->numtype = N_NUMTYPES;
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}
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ft->size = sz;
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ft->vtable = NULL;
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ft->artype = NULL;
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ft->marked = 1;
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ft->elsz = 0;
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ft->eltype = NULL;
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ft->init = NULL;
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if (iscons(t)) {
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if (isarray) {
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fltype_t *eltype = get_type(car_(cdr_(t)));
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if (eltype->size == 0) {
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free(ft);
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lerror(ArgError, "invalid array element type");
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}
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ft->elsz = eltype->size;
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ft->eltype = eltype;
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ft->init = &cvalue_array_init;
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// eltype->artype = ft; -- this is a bad idea since some types
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// carry array sizes
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} else if (car_(t) == enumsym) {
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ft->numtype = T_INT32;
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ft->init = &cvalue_enum_init;
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}
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}
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*bp = ft;
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return ft;
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}
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fltype_t *get_array_type(value_t eltype)
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{
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fltype_t *et = get_type(eltype);
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if (et->artype == NULL)
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et->artype = get_type(fl_list2(arraysym, eltype));
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return et->artype;
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}
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fltype_t *define_opaque_type(value_t sym, size_t sz, cvtable_t *vtab,
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cvinitfunc_t init)
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{
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fltype_t *ft = (fltype_t *)malloc(sizeof(fltype_t));
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ft->type = sym;
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ft->size = sz;
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ft->numtype = N_NUMTYPES;
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ft->vtable = vtab;
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ft->artype = NULL;
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ft->eltype = NULL;
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ft->elsz = 0;
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ft->marked = 1;
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ft->init = init;
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return ft;
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}
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void relocate_typetable(void)
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{
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htable_t *h = &TypeTable;
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size_t i;
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void *nv;
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for (i = 0; i < h->size; i += 2) {
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if (h->table[i] != HT_NOTFOUND) {
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nv = (void *)relocate((value_t)h->table[i]);
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h->table[i] = nv;
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if (h->table[i + 1] != HT_NOTFOUND)
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((fltype_t *)h->table[i + 1])->type = (value_t)nv;
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}
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}
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}
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