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authorusa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2008-06-13 05:56:51 +0000
committerusa <usa@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2008-06-13 05:56:51 +0000
commit26f26890aae734fba47ae06903da8692e874249a (patch)
tree225ae604692fe848da27dc9c1d43e1571ba9bc84 /README.EXT
parent074a876df50f2c42563683713eb1df4b8be4bc4b (diff)
* README.EXT: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@17146 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'README.EXT')
-rw-r--r--README.EXT9
1 files changed, 8 insertions, 1 deletions
diff --git a/README.EXT b/README.EXT
index f93f829..daf67a5 100644
--- a/README.EXT
+++ b/README.EXT
@@ -31,7 +31,7 @@ The Ruby interpreter has the following data types:
T_STRING string
T_REGEXP regular expression
T_ARRAY array
- T_FIXNUM Fixnum(31bit integer)
+ T_FIXNUM Fixnum(31bit or 63bit integer)
T_HASH associative array
T_STRUCT (Ruby) structure
T_BIGNUM multi precision integer
@@ -106,6 +106,13 @@ representation of var. These macros will skip the replacement if var
is a String. Notice that the macros take only the lvalue as their
argument, to change the value of var in place.
+You can also use the macro named StringValueCStr(). This is just
+like StringValuePtr(), but always add nul character at the end of
+the result. If the result contains nul character, this macro causes
+the ArgumentError exception.
+StringValuePtr() doesn't gurantee to exist nul at the end of the
+result, and the result may contain nul.
+
In version 1.6 or earlier, STR2CSTR() was used to do the same thing
but now it is deprecated in version 1.7, because STR2CSTR() has a risk
of a dangling pointer problem in the to_str() implicit conversion.