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#include "lit.h"
#include "fn.h"
#include "lex.h"
#include "parse.h"
#include "prv.h"
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
void lit_free(struct lit *l)
{
free(l->name);
}
static char *gen(struct ast *ast, struct fn *fn)
{
static const char fmt[] = "__str_%zu";
int n = snprintf(NULL, 0, fmt, ast->litcnt);
char *ret = NULL;
size_t sz;
if (n < 0)
{
fprintf(stderr, "%s: snprintf(3) failed\n", __func__);
goto failure;
}
else if (!(ret = malloc((sz = n + 1))))
{
perror("malloc(3)");
goto failure;
}
n = snprintf(ret, sz, fmt, ast->litcnt);
if (n < 0 || n >= sz)
{
fprintf(stderr, "%s: snprintf(3) failed with %d\n", __func__, n);
goto failure;
}
ast->litcnt++;
return ret;
failure:
free(ret);
return NULL;
}
static const struct lit *find(const struct tk *tk, const struct ast *ast)
{
for (const struct lit *l = ast->lits; l; l = l->next)
if (!strcmp(l->tk->s, tk->s))
return l;
return NULL;
}
int lit_cgen(const struct lit *l)
{
printf("data $%s = { b \"%s\", b 0 }\n", l->name, l->tk->s);
return 0;
}
const struct lit *lit_push(const struct tk *tk, struct prv *p)
{
char *name = NULL;
struct fn *fn = fn_cur(p);
struct ast *ast = p->ast;
const struct lit *prev = find(tk, ast);
struct lit *l;
if (prev)
return prev;
else if (!(name = gen(ast, fn)))
goto failure;
else if (!(l = malloc(sizeof *l)))
{
perror("malloc(3)");
goto failure;
}
*l = (struct lit)
{
.name = name,
.fn = fn,
.tk = tk
};
if (!ast->lits)
ast->lits = l;
else if (ast->lastlit)
ast->lastlit->next = l;
ast->lastlit = l;
fprintf(stderr, "adding literal \"%s\"\n", name);
return l;
failure:
free(name);
return NULL;
}
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