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* string.c (str_gsub): use a string object for exception safeness.
[ruby-dev:24601] git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7117 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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@ -1,3 +1,8 @@
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Wed Oct 27 09:17:30 2004 Nobuyoshi Nakada <nobu@ruby-lang.org>
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* string.c (str_gsub): use a string object for exception safeness.
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[ruby-dev:24601]
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Tue Oct 26 23:30:39 2004 Dave Thomas <dave@pragprog.com>
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* lib/rdoc/code_objects.rb (RDoc::Context::add_class_or_module):
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58
string.c
58
string.c
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@ -36,6 +36,17 @@ VALUE rb_cString;
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VALUE rb_fs;
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static inline void
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str_mod_check(s, p, len)
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VALUE s;
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char *p;
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long len;
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{
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if (RSTRING(s)->ptr != p || RSTRING(s)->len != len) {
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rb_raise(rb_eRuntimeError, "string modified");
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}
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}
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static VALUE str_alloc _((VALUE));
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static VALUE
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str_alloc(klass)
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@ -2008,7 +2019,7 @@ str_gsub(argc, argv, str, bang)
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VALUE str;
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int bang;
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{
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VALUE pat, val, repl, match;
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VALUE pat, val, repl, match, dest;
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struct re_registers *regs;
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long beg, n;
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long offset, blen, len;
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@ -2037,7 +2048,8 @@ str_gsub(argc, argv, str, bang)
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}
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blen = RSTRING(str)->len + 30; /* len + margin */
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buf = ALLOC_N(char, blen);
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dest = rb_str_new5(str, 0, blen);
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buf = RSTRING(dest)->ptr;
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bp = buf;
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cp = RSTRING(str)->ptr;
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@ -2048,9 +2060,7 @@ str_gsub(argc, argv, str, bang)
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if (iter) {
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rb_match_busy(match);
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val = rb_obj_as_string(rb_yield(rb_reg_nth_match(0, match)));
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if (RSTRING(str)->ptr == buf) {
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rb_raise(rb_eRuntimeError, "gsub reentered");
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}
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str_mod_check(dest, buf, blen);
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rb_backref_set(match);
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}
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else {
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@ -2061,7 +2071,9 @@ str_gsub(argc, argv, str, bang)
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if (blen < len) {
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while (blen < len) blen *= 2;
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len = bp - buf;
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REALLOC_N(buf, char, blen);
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RESIZE_CAPA(dest, blen);
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RSTRING(dest)->len = blen;
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buf = RSTRING(dest)->ptr;
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bp = buf + len;
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}
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len = beg - offset; /* copy pre-match substr */
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@ -2087,30 +2099,32 @@ str_gsub(argc, argv, str, bang)
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}
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if (RSTRING(str)->len > offset) {
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len = bp - buf;
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if (blen - len < RSTRING(str)->len - offset + 1) {
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REALLOC_N(buf, char, len + RSTRING(str)->len - offset + 1);
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if (blen - len < RSTRING(str)->len - offset) {
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blen = len + RSTRING(str)->len - offset;
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RESIZE_CAPA(dest, blen);
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buf = RSTRING(dest)->ptr;
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bp = buf + len;
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}
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memcpy(bp, cp, RSTRING(str)->len - offset);
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bp += RSTRING(str)->len - offset;
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}
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rb_backref_set(match);
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*bp = '\0';
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if (bang) {
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if (str_independent(str)) {
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free(RSTRING(str)->ptr);
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}
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FL_UNSET(str, ELTS_SHARED|STR_ASSOC);
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RSTRING(str)->ptr = buf;
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RSTRING(str)->aux.capa = blen;
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RSTRING(dest)->ptr = 0;
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RSTRING(dest)->len = 0;
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}
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else {
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VALUE dup = str_alloc(rb_obj_class(str));
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OBJ_INFECT(dup, str);
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str = dup;
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OBJ_INFECT(dest, str);
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str = dest;
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}
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RSTRING(str)->ptr = buf;
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RSTRING(str)->len = len = bp - buf;
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RSTRING(str)->ptr[len] = '\0';
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RSTRING(str)->aux.capa = len;
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RSTRING(str)->len = bp - buf;
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if (tainted) OBJ_TAINT(str);
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return str;
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@ -3592,18 +3606,6 @@ rb_f_split(argc, argv)
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return rb_str_split_m(argc, argv, uscore_get());
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}
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static inline void
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str_mod_check(s, p, len)
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VALUE s;
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char *p;
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long len;
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{
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if (RSTRING(s)->ptr != p || RSTRING(s)->len != len) {
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rb_raise(rb_eRuntimeError, "string modified");
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}
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}
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/*
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* call-seq:
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* str.each(separator=$/) {|substr| block } => str
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