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faster and safer dbuf functions (#443)

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Fabrice Bellard
2025-10-13 13:51:25 +02:00
parent 2a53de04c6
commit 0d4cd2d051
5 changed files with 77 additions and 35 deletions
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8
quickjs.c
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@@ -22835,7 +22835,7 @@ static void emit_op(JSParseState *s, uint8_t val)
static void emit_atom(JSParseState *s, JSAtom name)
{
DynBuf *bc = &s->cur_func->byte_code;
if (dbuf_realloc(bc, bc->size + 4))
if (dbuf_claim(bc, 4))
return; /* not enough memory : don't duplicate the atom */
put_u32(bc->buf + bc->size, JS_DupAtom(s->ctx, name));
bc->size += 4;
@@ -27751,7 +27751,7 @@ static __exception int js_parse_for_in_of(JSParseState *s, int label_name,
int chunk_size = pos_expr - pos_next;
int offset = bc->size - pos_next;
int i;
dbuf_realloc(bc, bc->size + chunk_size);
dbuf_claim(bc, chunk_size);
dbuf_put(bc, bc->buf + pos_next, chunk_size);
memset(bc->buf + pos_next, OP_nop, chunk_size);
/* `next` part ends with a goto */
@@ -28157,7 +28157,7 @@ static __exception int js_parse_statement_or_decl(JSParseState *s,
int chunk_size = pos_body - pos_cont;
int offset = bc->size - pos_cont;
int i;
dbuf_realloc(bc, bc->size + chunk_size);
dbuf_claim(bc, chunk_size);
dbuf_put(bc, bc->buf + pos_cont, chunk_size);
memset(bc->buf + pos_cont, OP_nop, chunk_size);
/* increment part ends with a goto */
@@ -37097,7 +37097,7 @@ static int JS_WriteObjectAtoms(BCWriterState *s)
/* XXX: could just append dbuf1 data, but it uses more memory if
dbuf1 is larger than dbuf */
atoms_size = s->dbuf.size;
if (dbuf_realloc(&dbuf1, dbuf1.size + atoms_size))
if (dbuf_claim(&dbuf1, atoms_size))
goto fail;
memmove(dbuf1.buf + atoms_size, dbuf1.buf, dbuf1.size);
memcpy(dbuf1.buf, s->dbuf.buf, atoms_size);