diff options
Diffstat (limited to 'string.c')
| -rw-r--r-- | string.c | 25 |
1 files changed, 19 insertions, 6 deletions
@@ -4791,8 +4791,10 @@ tr_trans(VALUE str, VALUE src, VALUE repl, int sflag) char *buf = ALLOC_N(char, max), *t = buf; while (s < send) { - c0 = c = rb_enc_codepoint(s, send, enc); - tlen = clen = rb_enc_codelen(c, enc); + int may_modify = 0; + c0 = c = rb_enc_codepoint(s, send, e1); + clen = rb_enc_codelen(c, e1); + tlen = enc == e1 ? clen : rb_enc_codelen(c, enc); s += clen; if (c < 256) { @@ -4819,6 +4821,7 @@ tr_trans(VALUE str, VALUE src, VALUE repl, int sflag) else { save = -1; c = c0; + if (enc != e1) may_modify = 1; } while (t - buf + tlen >= max) { offset = t - buf; @@ -4827,6 +4830,9 @@ tr_trans(VALUE str, VALUE src, VALUE repl, int sflag) t = buf + offset; } rb_enc_mbcput(c, t, enc); + if (may_modify && memcmp(s, t, tlen) != 0) { + modify = 1; + } t += tlen; } *t = '\0'; @@ -4858,8 +4864,10 @@ tr_trans(VALUE str, VALUE src, VALUE repl, int sflag) char *buf = ALLOC_N(char, max), *t = buf; while (s < send) { - c0 = c = rb_enc_codepoint(s, send, enc); - tlen = clen = rb_enc_codelen(c, enc); + int may_modify = 0; + c0 = c = rb_enc_codepoint(s, send, e1); + clen = rb_enc_codelen(c, e1); + tlen = enc == e1 ? clen : rb_enc_codelen(c, enc); if (c < 256) { c = trans[c]; @@ -4881,8 +4889,8 @@ tr_trans(VALUE str, VALUE src, VALUE repl, int sflag) modify = 1; } else { - modify = 1; c = c0; + if (enc != e1) may_modify = 1; } while (t - buf + tlen >= max) { offset = t - buf; @@ -4890,7 +4898,12 @@ tr_trans(VALUE str, VALUE src, VALUE repl, int sflag) REALLOC_N(buf, char, max); t = buf + offset; } - if (s != t) rb_enc_mbcput(c, t, enc); + if (s != t) { + rb_enc_mbcput(c, t, enc); + if (may_modify && memcmp(s, t, tlen) != 0) { + modify = 1; + } + } s += clen; t += tlen; } |