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#include "display.h"
#include "cgen.h"
#include "errloc.h"
#include "fn.h"
#include "lit.h"
#include "parse.h"
#include "prv.h"
#include "stmt.h"
#include "storage.h"
#include "type.h"
#include <errno.h>
#include <stdlib.h>
#include <string.h>
static int finalize(const struct lex *l, const struct display *d,
const struct prv *p)
{
const struct ast *ast = p->ast;
struct fn *fn = &ast->fns[ast->nfns - 1];
size_t n = fn->nstmts + 1;
struct stmt *stmts = realloc(fn->stmts, n * sizeof *stmts);
if (!stmts)
{
perror("realloc(3)");
return -1;
}
fn->stmts = stmts;
fn->stmts[fn->nstmts++] = (struct stmt)
{
.type = DISPLAY,
.u.display = *d
};
fprintf(stderr, "\t\tadding display statement with %zu entries%s\n",
d->nentries, d->println ? "" : ", no lf");
return 0;
}
static int entry(const struct lex *l, const struct tk *tk, struct display *d,
struct prv *p)
{
size_t n = d->nentries + 1;
struct dspentry *entries;
const struct stentry *stentry = NULL;
const struct fn *fn = fn_cur(p);
const struct lit *lit = NULL;
if (tk->type == ID)
{
const struct type *t = NULL;
if ((t = type_find(fn, tk->s)))
{
if (t->type != C)
{
errloc(tk, "type \"%s\" not a constant", tk->s);
return -1;
}
else if (!(lit = lit_push(t->tk, p)))
return -1;
}
else if (!(stentry = fn_var(fn, tk)))
{
errloc(tk, "undefined reference to \"%s\"", tk->s);
return -1;
}
}
if (tk->type == LIT && !(lit = lit_push(tk, p)))
return -1;
else if (!(entries = realloc(d->entries, n * sizeof *entries)))
{
perror("realloc(3)");
return -1;
}
d->entries = entries;
d->entries[d->nentries++] = (struct dspentry)
{
.tk = tk,
.lit = lit,
.entry = stentry
};
return 0;
}
static int cg_val(const struct tk *tk)
{
const char *num = tk->s;
int neg = *num == '-';
unsigned long long uv;
char *end;
fputs("call $printf(l $____fmt", stdout);
errno = 0;
uv = strtoull(num, &end, 16);
if (!neg && !errno && !*end)
printf("lx, ..., l %llu )\n", uv);
else
{
errno = 0;
uv = strtoull(num, &end, 0);
if (neg || errno || *end)
{
long long v = strtoll(num, NULL, 0);
printf("l, ..., l %lld )\n", v);
}
else
printf("l, ..., l %llu )\n", uv);
}
return 0;
}
static int cg_lit(const struct dspentry *e)
{
const struct lit *l = e->lit;
if (!l)
{
fprintf(stderr, "%s: unexpected null literal\n", __func__);
return -1;
}
puts("%v =l loadl $stdout");
printf("call $fputs(l $%s, w %%v)\n", l->name);
return 0;
}
static int cg_id(const struct dspentry *de, const struct fn *fn)
{
const struct stentry *e = de->entry;
const struct type *t = e->t;
const char *id = e->tk->s;
int global = cgen_global(fn, e);
size_t sz = t->sz;
const char *asz = cgen_sz(sz < 4 ? 4 : sz);
const struct param *ret = fn->pr->ret;
int isret = ret && ret->entry == e;
if (global)
printf("%%v =%s load%s $%s\n", asz, cgen_load(t), id);
else if (isret)
printf("%%v =%s add 0, %%__ret\n", asz);
else
printf("%%v =%s add 0, %%%s_\n", asz, id);
if (isret)
printf("call $printf(l $____fmt%s, ..., w %%__ret )\n", cgen_type(t));
else if (global)
printf("call $printf(l $____fmt%s, ..., w %%v )\n", cgen_type(t));
else
printf("call $printf(l $____fmt%s, ..., w %%%s_ )\n", cgen_type(t), id);
return 0;
}
int display_cgen(const struct display *d, struct cgen *c)
{
for (size_t i = 0; i < d->nentries; i++)
{
const struct dspentry *e = &d->entries[i];
const struct tk *tk = e->tk;
if (tk->type == LIT && cg_lit(e))
return -1;
else if (tk->type == NUM && cg_val(tk))
return -1;
else if (tk->type == ID && e->entry && cg_id(e, c->fn))
return -1;
else if (tk->type == ID && e->lit && cg_lit(e))
return -1;
}
if (d->println)
puts("call $putchar(l 10 )");
return 0;
}
void display_free(struct display *d)
{
free(d->entries);
}
int display(const struct lex *l, struct prv *p)
{
const struct tk *tk = p->stk + 1;
struct display d = {0};
struct pos *pos = &p->pos[p->i];
int eof;
if (lex_eof(l, tk))
{
errloc(tk - 1, "incomplete display statement");
return -1;
}
for (;;)
if (entry(l, tk, &d, p))
goto failure;
else if ((eof = lex_eof(l, ++tk)) || kw(tk->s))
break;
if (eof || strcmp(tk->s, "etc"))
d.println = 1;
else if (!eof)
tk++;
if (finalize(l, &d, p))
goto failure;
pos->seq = pos->stseq = stmts;
pos->step = stmts->steps;
p->stk = tk;
return 1;
failure:
display_free(&d);
return -1;
}
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