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optimized string_buffer_putc()

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Fabrice Bellard
2025-10-08 11:32:17 +02:00
parent e5de89fb3f
commit 79f3ae2959
1 changed files with 24 additions and 4 deletions
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28
quickjs.c
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@@ -3610,7 +3610,7 @@ static no_inline int string_buffer_realloc(StringBuffer *s, int new_len, int c)
return 0;
}
static no_inline int string_buffer_putc_slow(StringBuffer *s, uint32_t c)
static no_inline int string_buffer_putc16_slow(StringBuffer *s, uint32_t c)
{
if (unlikely(s->len >= s->size)) {
if (string_buffer_realloc(s, s->len + 1, c))
@@ -3655,11 +3655,10 @@ static int string_buffer_putc16(StringBuffer *s, uint32_t c)
return 0;
}
}
return string_buffer_putc_slow(s, c);
return string_buffer_putc16_slow(s, c);
}
/* 0 <= c <= 0x10ffff */
static int string_buffer_putc(StringBuffer *s, uint32_t c)
static int string_buffer_putc_slow(StringBuffer *s, uint32_t c)
{
if (unlikely(c >= 0x10000)) {
/* surrogate pair */
@@ -3670,6 +3669,27 @@ static int string_buffer_putc(StringBuffer *s, uint32_t c)
return string_buffer_putc16(s, c);
}
/* 0 <= c <= 0x10ffff */
static inline int string_buffer_putc(StringBuffer *s, uint32_t c)
{
if (likely(s->len < s->size)) {
if (s->is_wide_char) {
if (c < 0x10000) {
s->str->u.str16[s->len++] = c;
return 0;
} else if (likely((s->len + 1) < s->size)) {
s->str->u.str16[s->len++] = get_hi_surrogate(c);
s->str->u.str16[s->len++] = get_lo_surrogate(c);
return 0;
}
} else if (c < 0x100) {
s->str->u.str8[s->len++] = c;
return 0;
}
}
return string_buffer_putc_slow(s, c);
}
static int string_getc(const JSString *p, int *pidx)
{
int idx, c, c1;