added tag v1_9_0_4

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/tags/v1_9_0_4@18845 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 482 insertions, 0 deletions

diff --git a/trunk/ext/dl/cptr.c b/trunk/ext/dl/cptr.c
new file mode 100644
index 0000000000..7487b0cf55
--- /dev/null
+++ b/trunk/ext/dl/cptr.c
@@ -0,0 +1,482 @@
+/* -*- C -*-
+ * $Id$
+ */
+
+#include <ruby/ruby.h>
+#include <ruby/io.h>
+#include <ctype.h>
+#include "dl.h"
+
+VALUE rb_cDLCPtr;
+
+static ID id_to_ptr;
+
+static void
+dlptr_free(struct ptr_data *data)
+{
+  if (data->ptr) {
+      if (data->free) {
+	  (*(data->free))(data->ptr);
+      }
+  }
+}
+
+static void
+dlptr_mark(struct ptr_data *data)
+{
+}
+
+void
+dlptr_init(VALUE val)
+{
+  struct ptr_data *data;
+
+  Data_Get_Struct(val, struct ptr_data, data);
+  OBJ_TAINT(val);
+}
+
+VALUE
+rb_dlptr_new2(VALUE klass, void *ptr, long size, freefunc_t func)
+{
+  struct ptr_data *data;
+  VALUE val;
+
+  rb_secure(4);
+  val = Data_Make_Struct(klass, struct ptr_data,
+			 0, dlptr_free, data);
+  data->ptr = ptr;
+  data->free = func;
+  data->size = size;
+  dlptr_init(val);
+
+  return val;
+}
+
+VALUE
+rb_dlptr_new(void *ptr, long size, freefunc_t func)
+{
+  return rb_dlptr_new2(rb_cDLCPtr, ptr, size, func);
+}
+
+VALUE
+rb_dlptr_malloc(long size, freefunc_t func)
+{
+  void *ptr;
+
+  rb_secure(4);
+  ptr = ruby_xmalloc((size_t)size);
+  memset(ptr,0,(size_t)size);
+  return rb_dlptr_new(ptr, size, func);
+}
+
+void *
+rb_dlptr2cptr(VALUE val)
+{
+  struct ptr_data *data;
+  void *ptr;
+
+  if (rb_obj_is_kind_of(val, rb_cDLCPtr)) {
+    Data_Get_Struct(val, struct ptr_data, data);
+    ptr = data->ptr;
+  }
+  else if (val == Qnil) {
+    ptr = NULL;
+  }
+  else{
+    rb_raise(rb_eTypeError, "DL::PtrData was expected");
+  }
+    
+  return ptr;
+}
+
+static VALUE
+rb_dlptr_s_allocate(VALUE klass)
+{
+  VALUE obj;
+  struct ptr_data *data;
+
+  rb_secure(4);
+  obj = Data_Make_Struct(klass, struct ptr_data, dlptr_mark, dlptr_free, data);
+  data->ptr = 0;
+  data->size = 0;
+  data->free = 0;
+
+  return obj;
+}
+
+static VALUE
+rb_dlptr_initialize(int argc, VALUE argv[], VALUE self)
+{
+  VALUE ptr, sym, size;
+  struct ptr_data *data;
+  void *p = NULL;
+  freefunc_t f = NULL;
+  long s = 0;
+
+  switch (rb_scan_args(argc, argv, "12", &ptr, &size, &sym)) {
+  case 1:
+    p = (void*)(NUM2PTR(rb_Integer(ptr)));
+    break;
+  case 2:
+    p = (void*)(NUM2PTR(rb_Integer(ptr)));
+    s = NUM2LONG(size);
+    break;
+  case 3:
+    p = (void*)(NUM2PTR(rb_Integer(ptr)));
+    s = NUM2LONG(size);
+    f = NIL_P(sym) ? NULL : RCFUNC_DATA(sym)->ptr;
+    break;
+  default:
+    rb_bug("rb_dlptr_initialize");
+  }
+
+  if (p) {
+    Data_Get_Struct(self, struct ptr_data, data);
+    if (data->ptr && data->free) {
+      /* Free previous memory. Use of inappropriate initialize may cause SEGV. */
+      (*(data->free))(data->ptr);
+    }
+    data->ptr  = p;
+    data->size = s;
+    data->free = f;
+  }
+
+  return Qnil;
+}
+
+static VALUE
+rb_dlptr_s_malloc(int argc, VALUE argv[], VALUE klass)
+{
+  VALUE size, sym, obj;
+  int   s;
+  freefunc_t f;
+
+  switch (rb_scan_args(argc, argv, "11", &size, &sym)) {
+  case 1:
+    s = NUM2LONG(size);
+    f = NULL;
+    break;
+  case 2:
+    s = NUM2LONG(size);
+    f = RCFUNC_DATA(sym)->ptr;
+    break;
+  default:
+    rb_bug("rb_dlptr_s_malloc");
+  }
+
+  obj = rb_dlptr_malloc(s,f);
+
+  return obj;
+}
+
+VALUE
+rb_dlptr_to_i(VALUE self)
+{
+  struct ptr_data *data;
+
+  Data_Get_Struct(self, struct ptr_data, data);
+  return PTR2NUM(data->ptr);
+}
+
+VALUE
+rb_dlptr_to_value(VALUE self)
+{
+    struct ptr_data *data;
+    Data_Get_Struct(self, struct ptr_data, data);
+    return (VALUE)(data->ptr);
+}
+
+VALUE
+rb_dlptr_ptr(VALUE self)
+{
+  struct ptr_data *data;
+
+  Data_Get_Struct(self, struct ptr_data, data);
+  return rb_dlptr_new(*((void**)(data->ptr)),0,0);
+}
+
+VALUE
+rb_dlptr_ref(VALUE self)
+{
+  struct ptr_data *data;
+
+  Data_Get_Struct(self, struct ptr_data, data);
+  return rb_dlptr_new(&(data->ptr),0,0);
+}
+
+VALUE
+rb_dlptr_null_p(VALUE self)
+{
+  struct ptr_data *data;
+
+  Data_Get_Struct(self, struct ptr_data, data);
+  return data->ptr ? Qfalse : Qtrue;
+}
+
+VALUE
+rb_dlptr_free_set(VALUE self, VALUE val)
+{
+  struct ptr_data *data;
+  extern VALUE rb_cDLCFunc;
+
+  Data_Get_Struct(self, struct ptr_data, data);
+  if( rb_obj_is_kind_of(val, rb_cDLCFunc) == Qtrue ){
+      data->free = RCFUNC_DATA(val)->ptr;
+  }
+  else{
+      data->free = NUM2PTR(rb_Integer(val));
+  }
+
+  return Qnil;
+}
+
+VALUE
+rb_dlptr_free_get(VALUE self)
+{
+  struct ptr_data *pdata;
+
+  Data_Get_Struct(self, struct ptr_data, pdata);
+
+  return rb_dlcfunc_new(pdata->free, DLTYPE_VOID, "free<anonymous>", CFUNC_CDECL);
+}
+
+VALUE
+rb_dlptr_to_s(int argc, VALUE argv[], VALUE self)
+{
+  struct ptr_data *data;
+  VALUE arg1, val;
+  int len;
+
+  Data_Get_Struct(self, struct ptr_data, data);
+  switch (rb_scan_args(argc, argv, "01", &arg1)) {
+  case 0:
+    val = rb_tainted_str_new2((char*)(data->ptr));
+    break;
+  case 1:
+    len = NUM2INT(arg1);
+    val = rb_tainted_str_new((char*)(data->ptr), len);
+    break;
+  default:
+    rb_bug("rb_dlptr_to_s");
+  }
+
+  return val;
+}
+
+VALUE
+rb_dlptr_to_str(int argc, VALUE argv[], VALUE self)
+{
+  struct ptr_data *data;
+  VALUE arg1, val;
+  int len;
+
+  Data_Get_Struct(self, struct ptr_data, data);
+  switch (rb_scan_args(argc, argv, "01", &arg1)) {
+  case 0:
+    val = rb_tainted_str_new((char*)(data->ptr),data->size);
+    break;
+  case 1:
+    len = NUM2INT(arg1);
+    val = rb_tainted_str_new((char*)(data->ptr), len);
+    break;
+  default:
+    rb_bug("rb_dlptr_to_str");
+  }
+
+  return val;
+}
+
+VALUE
+rb_dlptr_inspect(VALUE self)
+{
+  struct ptr_data *data;
+  char str[1024];
+
+  Data_Get_Struct(self, struct ptr_data, data);
+  snprintf(str, 1023, "#<%s:%p ptr=%p size=%ld free=%p>",
+	   rb_class2name(CLASS_OF(self)), data, data->ptr, data->size, data->free);
+  return rb_str_new2(str);
+}
+
+VALUE
+rb_dlptr_eql(VALUE self, VALUE other)
+{
+  void *ptr1, *ptr2;
+  ptr1 = rb_dlptr2cptr(self);
+  ptr2 = rb_dlptr2cptr(other);
+
+  return ptr1 == ptr2 ? Qtrue : Qfalse;
+}
+
+VALUE
+rb_dlptr_cmp(VALUE self, VALUE other)
+{
+  void *ptr1, *ptr2;
+  ptr1 = rb_dlptr2cptr(self);
+  ptr2 = rb_dlptr2cptr(other);
+  return PTR2NUM((long)ptr1 - (long)ptr2);
+}
+
+VALUE
+rb_dlptr_plus(VALUE self, VALUE other)
+{
+  void *ptr;
+  long num, size;
+
+  ptr = rb_dlptr2cptr(self);
+  size = RPTR_DATA(self)->size;
+  num = NUM2LONG(other);
+  return rb_dlptr_new((char *)ptr + num, size - num, 0);
+}
+
+VALUE
+rb_dlptr_minus(VALUE self, VALUE other)
+{
+  void *ptr;
+  long num, size;
+
+  ptr = rb_dlptr2cptr(self);
+  size = RPTR_DATA(self)->size;
+  num = NUM2LONG(other);
+  return rb_dlptr_new((char *)ptr - num, size + num, 0);
+}
+
+VALUE
+rb_dlptr_aref(int argc, VALUE argv[], VALUE self)
+{
+    VALUE arg0, arg1;
+    VALUE retval = Qnil;
+    size_t offset, len;
+
+    switch( rb_scan_args(argc, argv, "11", &arg0, &arg1) ){
+    case 1:
+	offset = NUM2ULONG(arg0);
+	retval = INT2NUM(*((char*)RPTR_DATA(self)->ptr + offset));
+	break;
+    case 2:
+	offset = NUM2ULONG(arg0);
+	len    = NUM2ULONG(arg1);
+	retval = rb_tainted_str_new((char *)RPTR_DATA(self)->ptr + offset, len);
+	break;
+    default:
+	rb_bug("rb_dlptr_aref()");
+    }
+    return retval;
+}
+
+VALUE
+rb_dlptr_aset(int argc, VALUE argv[], VALUE self)
+{
+    VALUE arg0, arg1, arg2;
+    VALUE retval = Qnil;
+    size_t offset, len;
+    void *mem;
+
+    switch( rb_scan_args(argc, argv, "21", &arg0, &arg1, &arg2) ){
+    case 2:
+	offset = NUM2ULONG(arg0);
+	((char*)RPTR_DATA(self)->ptr)[offset] = NUM2UINT(arg1);
+	retval = arg1;
+	break;
+    case 3:
+	offset = NUM2ULONG(arg0);
+	len    = NUM2ULONG(arg1);
+	if( TYPE(arg2) == T_STRING ){
+	    mem = StringValuePtr(arg2);
+	}
+	else if( rb_obj_is_kind_of(arg2, rb_cDLCPtr) ){
+	    mem = rb_dlptr2cptr(arg2);
+	}
+	else{
+	    mem    = NUM2PTR(arg2);
+	}
+	memcpy((char *)RPTR_DATA(self)->ptr + offset, mem, len);
+	retval = arg2;
+	break;
+    default:
+	rb_bug("rb_dlptr_aset()");
+    }
+    return retval;
+}
+
+VALUE
+rb_dlptr_size(int argc, VALUE argv[], VALUE self)
+{
+  VALUE size;
+
+  if (rb_scan_args(argc, argv, "01", &size) == 0){
+    return LONG2NUM(RPTR_DATA(self)->size);
+  }
+  else{
+    RPTR_DATA(self)->size = NUM2LONG(size);
+    return size;
+  }
+}
+
+VALUE
+rb_dlptr_s_to_ptr(VALUE self, VALUE val)
+{
+    VALUE ptr;
+
+    if (rb_obj_is_kind_of(val, rb_cIO) == Qtrue){
+	rb_io_t *fptr;
+	FILE *fp;
+	GetOpenFile(val, fptr);
+	fp = rb_io_stdio_file(fptr);
+	ptr = rb_dlptr_new(fp, 0, NULL);
+    }
+    else if (rb_obj_is_kind_of(val, rb_cString) == Qtrue){
+        char *str = StringValuePtr(val);
+        ptr = rb_dlptr_new(str, RSTRING_LEN(val), NULL); 
+    }
+    else if (rb_respond_to(val, id_to_ptr)){
+	VALUE vptr = rb_funcall(val, id_to_ptr, 0);
+	if (rb_obj_is_kind_of(vptr, rb_cDLCPtr)){
+	    ptr = vptr;
+	}
+	else{
+	    rb_raise(rb_eDLError, "to_ptr should return a CPtr object");
+	}
+    }
+    else{
+	ptr = rb_dlptr_new(NUM2PTR(rb_Integer(val)), 0, NULL);
+    }
+    OBJ_INFECT(ptr, val);
+    return ptr;
+}
+
+void
+Init_dlptr()
+{
+    id_to_ptr = rb_intern("to_ptr");
+
+    rb_cDLCPtr = rb_define_class_under(rb_mDL, "CPtr", rb_cObject);
+    rb_define_alloc_func(rb_cDLCPtr, rb_dlptr_s_allocate);
+    rb_define_singleton_method(rb_cDLCPtr, "malloc", rb_dlptr_s_malloc, -1);
+    rb_define_singleton_method(rb_cDLCPtr, "to_ptr", rb_dlptr_s_to_ptr, 1);
+    rb_define_singleton_method(rb_cDLCPtr, "[]", rb_dlptr_s_to_ptr, 1);
+    rb_define_method(rb_cDLCPtr, "initialize", rb_dlptr_initialize, -1);
+    rb_define_method(rb_cDLCPtr, "free=", rb_dlptr_free_set, 1);
+    rb_define_method(rb_cDLCPtr, "free",  rb_dlptr_free_get, 0);
+    rb_define_method(rb_cDLCPtr, "to_i",  rb_dlptr_to_i, 0);
+    rb_define_method(rb_cDLCPtr, "to_value",  rb_dlptr_to_value, 0);
+    rb_define_method(rb_cDLCPtr, "ptr",   rb_dlptr_ptr, 0);
+    rb_define_method(rb_cDLCPtr, "+@", rb_dlptr_ptr, 0);
+    rb_define_method(rb_cDLCPtr, "ref",   rb_dlptr_ref, 0);
+    rb_define_method(rb_cDLCPtr, "-@", rb_dlptr_ref, 0);
+    rb_define_method(rb_cDLCPtr, "null?", rb_dlptr_null_p, 0);
+    rb_define_method(rb_cDLCPtr, "to_s", rb_dlptr_to_s, -1);
+    rb_define_method(rb_cDLCPtr, "to_str", rb_dlptr_to_str, -1);
+    rb_define_method(rb_cDLCPtr, "inspect", rb_dlptr_inspect, 0);
+    rb_define_method(rb_cDLCPtr, "<=>", rb_dlptr_cmp, 1);
+    rb_define_method(rb_cDLCPtr, "==", rb_dlptr_eql, 1);
+    rb_define_method(rb_cDLCPtr, "eql?", rb_dlptr_eql, 1);
+    rb_define_method(rb_cDLCPtr, "+", rb_dlptr_plus, 1);
+    rb_define_method(rb_cDLCPtr, "-", rb_dlptr_minus, 1);
+    rb_define_method(rb_cDLCPtr, "[]", rb_dlptr_aref, -1);
+    rb_define_method(rb_cDLCPtr, "[]=", rb_dlptr_aset, -1);
+    rb_define_method(rb_cDLCPtr, "size", rb_dlptr_size, -1);
+    rb_define_method(rb_cDLCPtr, "size=", rb_dlptr_size, -1);
+
+    rb_define_const(rb_mDL, "NULL", rb_dlptr_new(0, 0, 0));
+}