diff options
| -rw-r--r-- | ChangeLog | 7 | ||||
| -rw-r--r-- | string.c | 49 |
2 files changed, 55 insertions, 1 deletions
@@ -1,3 +1,10 @@ +Thu Sep 21 17:44:49 2006 Yukihiro Matsumoto <matz@ruby-lang.org> + + * string.c (rb_str_startwith): a new method to check if a string + starts with given prefix. + + * string.c (rb_str_endwith): the opposite of String#startwith?. + Thu Sep 21 16:29:02 2006 WATANABE Hirofumi <eban@ruby-lang.org> * rubytest.rb: use each_line instead of each. @@ -3118,7 +3118,7 @@ tr_setup_table(VALUE str, char table[256], int init) /* * call-seq: - * str.delete!([other_str]+>) => str or nil + * str.delete!([other_str]+) => str or nil * * Performs a <code>delete</code> operation in place, returning <i>str</i>, or * <code>nil</code> if <i>str</i> was not modified. @@ -4498,6 +4498,51 @@ rb_str_rpartition(VALUE str, VALUE sep) RSTRING_LEN(str)-pos-RSTRING_LEN(sep))); } +/* + * call-seq: + * str.startwith?([prefix]+) => true or false + * + * Returns true if <i>str</i> starts with the prefix given. + */ + +static VALUE +rb_str_startwith(int argc, VALUE *argv, VALUE str) +{ + int i; + + for (i=0; i<argc; i++) { + VALUE tmp = rb_check_string_type(argv[i]); + if (NIL_P(tmp)) continue; + if (RSTRING_LEN(str) < RSTRING_LEN(tmp)) continue; + if (rb_memcmp(RSTRING_PTR(str), RSTRING_PTR(tmp), RSTRING_LEN(tmp)) == 0) + return Qtrue; + } + return Qfalse; +} + +/* + * call-seq: + * str.endwith?([suffix]+) => true or false + * + * Returns true if <i>str</i> ends with the suffix given. + */ + +static VALUE +rb_str_endwith(int argc, VALUE *argv, VALUE str) +{ + int i; + + for (i=0; i<argc; i++) { + VALUE tmp = rb_check_string_type(argv[i]); + if (NIL_P(tmp)) continue; + if (RSTRING_LEN(str) < RSTRING_LEN(tmp)) continue; + if (rb_memcmp(RSTRING_PTR(str) + RSTRING_LEN(str) - RSTRING_LEN(tmp), + RSTRING_PTR(tmp), RSTRING_LEN(tmp)) == 0) + return Qtrue; + } + return Qfalse; +} + void rb_str_setter(VALUE val, ID id, VALUE *var) { @@ -4842,6 +4887,8 @@ Init_String(void) rb_define_method(rb_cString, "ord", rb_str_ord, 0); rb_define_method(rb_cString, "include?", rb_str_include, 1); + rb_define_method(rb_cString, "startwith?", rb_str_startwith, -1); + rb_define_method(rb_cString, "endwith?", rb_str_endwith, -1); rb_define_method(rb_cString, "scan", rb_str_scan, 1); |