зеркало из https://github.com/github/ruby.git
484 строки
10 KiB
C
484 строки
10 KiB
C
/* -*- C -*-
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* $Id$
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*/
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#include <ruby.h>
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#include <rubyio.h>
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#include <ctype.h>
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#include <version.h> /* for ruby version code */
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#include "dl.h"
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VALUE rb_cDLCPtr;
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static ID id_to_ptr;
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static void
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dlptr_free(struct ptr_data *data)
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{
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if (data->ptr) {
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if (data->free) {
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(*(data->free))(data->ptr);
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}
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}
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}
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static void
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dlptr_mark(struct ptr_data *data)
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{
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}
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void
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dlptr_init(VALUE val)
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{
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struct ptr_data *data;
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Data_Get_Struct(val, struct ptr_data, data);
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OBJ_TAINT(val);
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}
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VALUE
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rb_dlptr_new2(VALUE klass, void *ptr, long size, freefunc_t func)
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{
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struct ptr_data *data;
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VALUE val;
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rb_secure(4);
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val = Data_Make_Struct(klass, struct ptr_data,
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0, dlptr_free, data);
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data->ptr = ptr;
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data->free = func;
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data->size = size;
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dlptr_init(val);
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return val;
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}
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VALUE
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rb_dlptr_new(void *ptr, long size, freefunc_t func)
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{
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return rb_dlptr_new2(rb_cDLCPtr, ptr, size, func);
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}
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VALUE
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rb_dlptr_malloc(long size, freefunc_t func)
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{
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void *ptr;
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rb_secure(4);
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ptr = ruby_xmalloc((size_t)size);
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memset(ptr,0,(size_t)size);
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return rb_dlptr_new(ptr, size, func);
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}
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void *
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rb_dlptr2cptr(VALUE val)
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{
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struct ptr_data *data;
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void *ptr;
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if (rb_obj_is_kind_of(val, rb_cDLCPtr)) {
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Data_Get_Struct(val, struct ptr_data, data);
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ptr = data->ptr;
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}
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else if (val == Qnil) {
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ptr = NULL;
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}
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else{
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rb_raise(rb_eTypeError, "DL::PtrData was expected");
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}
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return ptr;
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}
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static VALUE
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rb_dlptr_s_allocate(VALUE klass)
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{
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VALUE obj;
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struct ptr_data *data;
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rb_secure(4);
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obj = Data_Make_Struct(klass, struct ptr_data, dlptr_mark, dlptr_free, data);
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data->ptr = 0;
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data->size = 0;
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data->free = 0;
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return obj;
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}
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static VALUE
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rb_dlptr_initialize(int argc, VALUE argv[], VALUE self)
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{
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VALUE ptr, sym, size;
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struct ptr_data *data;
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void *p = NULL;
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freefunc_t f = NULL;
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long s = 0;
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switch (rb_scan_args(argc, argv, "12", &ptr, &size, &sym)) {
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case 1:
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p = (void*)(NUM2PTR(rb_Integer(ptr)));
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break;
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case 2:
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p = (void*)(NUM2PTR(rb_Integer(ptr)));
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s = NUM2LONG(size);
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break;
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case 3:
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p = (void*)(NUM2PTR(rb_Integer(ptr)));
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s = NUM2LONG(size);
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f = NIL_P(sym) ? NULL : RCFUNC_DATA(sym)->ptr;
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break;
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default:
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rb_bug("rb_dlptr_initialize");
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}
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if (p) {
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Data_Get_Struct(self, struct ptr_data, data);
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if (data->ptr && data->free) {
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/* Free previous memory. Use of inappropriate initialize may cause SEGV. */
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(*(data->free))(data->ptr);
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}
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data->ptr = p;
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data->size = s;
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data->free = f;
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}
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return Qnil;
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}
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static VALUE
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rb_dlptr_s_malloc(int argc, VALUE argv[], VALUE klass)
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{
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VALUE size, sym, obj;
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int s;
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freefunc_t f;
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switch (rb_scan_args(argc, argv, "11", &size, &sym)) {
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case 1:
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s = NUM2LONG(size);
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f = NULL;
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break;
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case 2:
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s = NUM2LONG(size);
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f = RCFUNC_DATA(sym)->ptr;
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break;
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default:
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rb_bug("rb_dlptr_s_malloc");
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}
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obj = rb_dlptr_malloc(s,f);
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return obj;
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}
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VALUE
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rb_dlptr_to_i(VALUE self)
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{
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struct ptr_data *data;
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Data_Get_Struct(self, struct ptr_data, data);
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return PTR2NUM(data->ptr);
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}
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VALUE
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rb_dlptr_to_value(VALUE self)
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{
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struct ptr_data *data;
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Data_Get_Struct(self, struct ptr_data, data);
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return (VALUE)(data->ptr);
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}
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VALUE
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rb_dlptr_ptr(VALUE self)
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{
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struct ptr_data *data;
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Data_Get_Struct(self, struct ptr_data, data);
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return rb_dlptr_new(*((void**)(data->ptr)),0,0);
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}
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VALUE
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rb_dlptr_ref(VALUE self)
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{
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struct ptr_data *data;
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Data_Get_Struct(self, struct ptr_data, data);
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return rb_dlptr_new(&(data->ptr),0,0);
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}
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VALUE
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rb_dlptr_null_p(VALUE self)
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{
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struct ptr_data *data;
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Data_Get_Struct(self, struct ptr_data, data);
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return data->ptr ? Qfalse : Qtrue;
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}
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VALUE
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rb_dlptr_free_set(VALUE self, VALUE val)
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{
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struct ptr_data *data;
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extern VALUE rb_cDLCFunc;
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Data_Get_Struct(self, struct ptr_data, data);
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if( rb_obj_is_kind_of(val, rb_cDLCFunc) == Qtrue ){
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data->free = RCFUNC_DATA(val)->ptr;
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}
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else{
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data->free = NUM2PTR(rb_Integer(val));
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}
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return Qnil;
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}
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VALUE
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rb_dlptr_free_get(VALUE self)
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{
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struct ptr_data *pdata;
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Data_Get_Struct(self, struct ptr_data, pdata);
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return rb_dlcfunc_new(pdata->free, DLTYPE_VOID, "free<anonymous>", CFUNC_CDECL);
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}
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VALUE
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rb_dlptr_to_s(int argc, VALUE argv[], VALUE self)
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{
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struct ptr_data *data;
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VALUE arg1, val;
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int len;
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Data_Get_Struct(self, struct ptr_data, data);
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switch (rb_scan_args(argc, argv, "01", &arg1)) {
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case 0:
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val = rb_tainted_str_new2((char*)(data->ptr));
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break;
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case 1:
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len = NUM2INT(arg1);
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val = rb_tainted_str_new((char*)(data->ptr), len);
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break;
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default:
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rb_bug("rb_dlptr_to_s");
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}
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return val;
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}
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VALUE
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rb_dlptr_to_str(int argc, VALUE argv[], VALUE self)
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{
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struct ptr_data *data;
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VALUE arg1, val;
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int len;
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Data_Get_Struct(self, struct ptr_data, data);
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switch (rb_scan_args(argc, argv, "01", &arg1)) {
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case 0:
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val = rb_tainted_str_new((char*)(data->ptr),data->size);
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break;
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case 1:
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len = NUM2INT(arg1);
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val = rb_tainted_str_new((char*)(data->ptr), len);
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break;
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default:
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rb_bug("rb_dlptr_to_str");
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}
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return val;
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}
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VALUE
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rb_dlptr_inspect(VALUE self)
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{
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struct ptr_data *data;
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char str[1024];
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Data_Get_Struct(self, struct ptr_data, data);
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snprintf(str, 1023, "#<%s:%p ptr=%p size=%ld free=%p>",
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rb_class2name(CLASS_OF(self)), data, data->ptr, data->size, data->free);
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return rb_str_new2(str);
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}
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VALUE
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rb_dlptr_eql(VALUE self, VALUE other)
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{
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void *ptr1, *ptr2;
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ptr1 = rb_dlptr2cptr(self);
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ptr2 = rb_dlptr2cptr(other);
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return ptr1 == ptr2 ? Qtrue : Qfalse;
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}
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VALUE
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rb_dlptr_cmp(VALUE self, VALUE other)
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{
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void *ptr1, *ptr2;
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ptr1 = rb_dlptr2cptr(self);
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ptr2 = rb_dlptr2cptr(other);
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return PTR2NUM((long)ptr1 - (long)ptr2);
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}
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VALUE
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rb_dlptr_plus(VALUE self, VALUE other)
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{
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void *ptr;
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long num, size;
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ptr = rb_dlptr2cptr(self);
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size = RPTR_DATA(self)->size;
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num = NUM2LONG(other);
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return rb_dlptr_new((char *)ptr + num, size - num, 0);
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}
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VALUE
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rb_dlptr_minus(VALUE self, VALUE other)
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{
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void *ptr;
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long num, size;
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ptr = rb_dlptr2cptr(self);
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size = RPTR_DATA(self)->size;
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num = NUM2LONG(other);
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return rb_dlptr_new((char *)ptr - num, size + num, 0);
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}
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VALUE
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rb_dlptr_aref(int argc, VALUE argv[], VALUE self)
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{
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VALUE arg0, arg1;
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VALUE retval = Qnil;
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size_t offset, len;
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switch( rb_scan_args(argc, argv, "11", &arg0, &arg1) ){
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case 1:
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offset = NUM2ULONG(arg0);
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retval = INT2NUM(*((char*)RPTR_DATA(self)->ptr + offset));
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break;
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case 2:
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offset = NUM2ULONG(arg0);
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len = NUM2ULONG(arg1);
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retval = rb_tainted_str_new((char *)RPTR_DATA(self)->ptr + offset, len);
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break;
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default:
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rb_bug("rb_dlptr_aref()");
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}
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return retval;
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}
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VALUE
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rb_dlptr_aset(int argc, VALUE argv[], VALUE self)
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{
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VALUE arg0, arg1, arg2;
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VALUE retval = Qnil;
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size_t offset, len;
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void *mem;
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switch( rb_scan_args(argc, argv, "21", &arg0, &arg1, &arg2) ){
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case 2:
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offset = NUM2ULONG(arg0);
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((char*)RPTR_DATA(self)->ptr)[offset] = NUM2UINT(arg1);
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retval = arg1;
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break;
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case 3:
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offset = NUM2ULONG(arg0);
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len = NUM2ULONG(arg1);
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if( TYPE(arg2) == T_STRING ){
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mem = StringValuePtr(arg2);
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}
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else if( rb_obj_is_kind_of(arg2, rb_cDLCPtr) ){
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mem = rb_dlptr2cptr(arg2);
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}
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else{
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mem = NUM2PTR(arg2);
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}
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memcpy((char *)RPTR_DATA(self)->ptr + offset, mem, len);
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retval = arg2;
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break;
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default:
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rb_bug("rb_dlptr_aset()");
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}
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return retval;
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}
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VALUE
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rb_dlptr_size(int argc, VALUE argv[], VALUE self)
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{
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VALUE size;
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if (rb_scan_args(argc, argv, "01", &size) == 0){
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return LONG2NUM(RPTR_DATA(self)->size);
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}
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else{
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RPTR_DATA(self)->size = NUM2LONG(size);
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return size;
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}
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}
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VALUE
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rb_dlptr_s_to_ptr(VALUE self, VALUE val)
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{
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if( rb_obj_is_kind_of(val, rb_cIO) == Qtrue ){
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OpenFile *fptr;
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FILE *fp;
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GetOpenFile(val, fptr);
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#if RUBY_VERSION_CODE >= 190
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fp = rb_io_stdio_file(fptr);
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#else
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fp = fptr->f;
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#endif
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return rb_dlptr_new(fp, sizeof(FILE), NULL);
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}
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else if( rb_obj_is_kind_of(val, rb_cString) == Qtrue ){
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char *ptr = StringValuePtr(val);
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return rb_dlptr_new(ptr, RSTRING(val)->len, NULL);
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}
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else if( rb_respond_to(val, id_to_ptr) ){
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VALUE vptr = rb_funcall(val, id_to_ptr, 0);
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if( rb_obj_is_kind_of(vptr, rb_cDLCPtr) ){
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return vptr;
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}
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else{
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rb_raise(rb_eDLError, "to_ptr should return a CPtr object");
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}
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}
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else{
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return rb_dlptr_new(NUM2PTR(rb_Integer(val)), 0, NULL);
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}
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}
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void
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Init_dlptr()
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{
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id_to_ptr = rb_intern("to_ptr");
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rb_cDLCPtr = rb_define_class_under(rb_mDL, "CPtr", rb_cObject);
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rb_define_alloc_func(rb_cDLCPtr, rb_dlptr_s_allocate);
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rb_define_singleton_method(rb_cDLCPtr, "malloc", rb_dlptr_s_malloc, -1);
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rb_define_singleton_method(rb_cDLCPtr, "to_ptr", rb_dlptr_s_to_ptr, 1);
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rb_define_singleton_method(rb_cDLCPtr, "[]", rb_dlptr_s_to_ptr, 1);
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rb_define_method(rb_cDLCPtr, "initialize", rb_dlptr_initialize, -1);
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rb_define_method(rb_cDLCPtr, "free=", rb_dlptr_free_set, 1);
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rb_define_method(rb_cDLCPtr, "free", rb_dlptr_free_get, 0);
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rb_define_method(rb_cDLCPtr, "to_i", rb_dlptr_to_i, 0);
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rb_define_method(rb_cDLCPtr, "to_value", rb_dlptr_to_value, 0);
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rb_define_method(rb_cDLCPtr, "ptr", rb_dlptr_ptr, 0);
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rb_define_method(rb_cDLCPtr, "+@", rb_dlptr_ptr, 0);
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rb_define_method(rb_cDLCPtr, "ref", rb_dlptr_ref, 0);
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rb_define_method(rb_cDLCPtr, "-@", rb_dlptr_ref, 0);
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rb_define_method(rb_cDLCPtr, "null?", rb_dlptr_null_p, 0);
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rb_define_method(rb_cDLCPtr, "to_s", rb_dlptr_to_s, -1);
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rb_define_method(rb_cDLCPtr, "to_str", rb_dlptr_to_str, -1);
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rb_define_method(rb_cDLCPtr, "inspect", rb_dlptr_inspect, 0);
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rb_define_method(rb_cDLCPtr, "<=>", rb_dlptr_cmp, 1);
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rb_define_method(rb_cDLCPtr, "==", rb_dlptr_eql, 1);
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rb_define_method(rb_cDLCPtr, "eql?", rb_dlptr_eql, 1);
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rb_define_method(rb_cDLCPtr, "+", rb_dlptr_plus, 1);
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rb_define_method(rb_cDLCPtr, "-", rb_dlptr_minus, 1);
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rb_define_method(rb_cDLCPtr, "[]", rb_dlptr_aref, -1);
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rb_define_method(rb_cDLCPtr, "[]=", rb_dlptr_aset, -1);
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rb_define_method(rb_cDLCPtr, "size", rb_dlptr_size, -1);
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rb_define_method(rb_cDLCPtr, "size=", rb_dlptr_size, -1);
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rb_define_const(rb_mDL, "NULL", rb_dlptr_new(0, 0, 0));
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}
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