diff options
Diffstat (limited to 'string.c')
| -rw-r--r-- | string.c | 27 |
1 files changed, 26 insertions, 1 deletions
@@ -7251,6 +7251,21 @@ rb_str_escape(VALUE str) return result; } +/* Lookup table for the inspect fast path. 1 marks bytes that need + * no escaping. 0 marks bytes that need escape inspection: 0x00-0x1F + * (control), 0x22 ("), 0x23 (#), 0x5C (\), 0x7F (DEL), 0x80-0xFF + * (non-ASCII). */ +static const bool inspect_no_escape[256] = { + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x00-0x0F */ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, /* 0x10-0x1F */ + 1, 1, 0, 0, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x20-0x2F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x30-0x3F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x40-0x4F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 1, 1, 1, /* 0x50-0x5F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, /* 0x60-0x6F */ + 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, /* 0x70-0x7F */ +}; + /* * call-seq: * inspect -> string @@ -7266,10 +7281,11 @@ rb_str_inspect(VALUE str) rb_encoding *enc = rb_enc_from_index(encidx); const char *p, *pend, *prev; char buf[CHAR_ESC_LEN + 1]; - VALUE result = rb_str_buf_new(0); + VALUE result = rb_str_buf_new(RSTRING_LEN(str) + 2); /* string content + surrounding quotes */ rb_encoding *resenc = rb_default_internal_encoding(); int unicode_p = rb_enc_unicode_p(enc); int asciicompat = rb_enc_asciicompat(enc); + int cr = rb_enc_str_coderange(str); if (resenc == NULL) resenc = rb_default_external_encoding(); if (!rb_enc_asciicompat(resenc)) resenc = rb_usascii_encoding(); @@ -7282,6 +7298,15 @@ rb_str_inspect(VALUE str) unsigned int c, cc; int n; + /* Fast path: bulk-skip runs of safe ASCII bytes via a lookup table. + * Only well-formed strings (CR=7BIT for any encoding, or UTF-8 VALID) + * are eligible. */ + if (cr == ENC_CODERANGE_7BIT || + (encidx == ENCINDEX_UTF_8 && cr == ENC_CODERANGE_VALID)) { + while (p < pend && inspect_no_escape[(unsigned char)*p]) p++; + if (p >= pend) break; + } + n = rb_enc_precise_mbclen(p, pend, enc); if (!MBCLEN_CHARFOUND_P(n)) { if (p > prev) str_buf_cat(result, prev, p - prev); |