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Diffstat (limited to 'README.EXT')
| -rw-r--r-- | README.EXT | 30 |
1 files changed, 29 insertions, 1 deletions
diff --git a/README.EXT b/README.EXT index 95c5ddea61..4bbe1202e6 100644 --- a/README.EXT +++ b/README.EXT @@ -35,6 +35,7 @@ The Ruby interpreter has the following data types: T_HASH associative array T_STRUCT (Ruby) structure T_BIGNUM multi precision integer + T_FILE IO T_TRUE true T_FALSE false T_DATA data @@ -93,7 +94,9 @@ The T_FIXNUM data is a 31bit length fixed integer (63bit length on some machines), which can be convert to a C integer by using the FIX2INT() macro. There is also NUM2INT() which converts any Ruby numbers into C integers. The NUM2INT() macro includes a type check, so -an exception will be raised if the conversion failed. +an exception will be raised if the conversion failed. There are also +a macro NUM2DBL() to retrieve the double float value and STR2CSTR() is +useful to get the string as char*. Other data types have corresponding C structures, e.g. struct RArray for T_ARRAY etc. The VALUE of the type which has corresponding structure @@ -488,6 +491,8 @@ Init_dbm() rb_define_method(cDBM, "[]", fdbm_fetch, 1); : + /* ID for a instance variable to store DBM data */ + id_dbm = rb_intern("dbm"); } -- @@ -756,6 +761,25 @@ sval, and returns the DATA encapsulating the pointer to memory region. This macro retrieves the pointer value from DATA, and assigns it to the variable sval. +** Checking data types + +TYPE(value) +FIXNUM_P(value) +NIL_P(value) +void Check_Type(VALUE value, int type) +void Check_SafeStr(VALUE value) + +** Data type conversion + +FIX2INT(value) +INT2FIX(i) +NUM2INT(value) +INT2NUM(i) +NUM2DBL(value) +rb_float_new(f) +STR2CSTR(value) +rb_str_new2(s) + ** defining class/module VALUE rb_define_class(const char *name, VALUE super) @@ -944,6 +968,10 @@ Prints a warning message according to a printf-like format. Prints a warning message according to a printf-like format, if $VERBOSE is true. +void rb_raise(rb_eRuntimeError, const char *fmt, ...) + +Raises RuntimeError. The fmt is a format string just like printf(). + void rb_raise(VALUE exception, const char *fmt, ...) Raises a class exception. The fmt is a format string just like printf(). |