Class: FFI::AbstractMemory

Inherits:
Object
  • Object
show all
Defined in:
ext/ffi_c/AbstractMemory.c

Instance Method Summary collapse

Instance Method Details

#[](idx) ⇒ Object 



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# File 'ext/ffi_c/AbstractMemory.c', line 320

static VALUE
memory_aref(VALUE self, VALUE idx)
{
    AbstractMemory* ptr;
    VALUE rbOffset = Qnil;

    Data_Get_Struct(self, AbstractMemory, ptr);

    rbOffset = ULONG2NUM(NUM2ULONG(idx) * ptr->typeSize);

    return rb_funcall2(self, id_plus, 1, &rbOffset);
}

#clear ⇒ Object 



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# File 'ext/ffi_c/AbstractMemory.c', line 164

static VALUE
memory_clear(VALUE self)
{
    AbstractMemory* ptr = MEMORY(self);
    memset(ptr->address, 0, ptr->size);
    return self;
}

#get_array_of_float32 ⇒ Object Also known as: get_array_of_float

#get_array_of_float64 ⇒ Object Also known as: get_array_of_double

#get_array_of_pointer ⇒ Object

#get_array_of_string(*args) ⇒ Object 



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# File 'ext/ffi_c/AbstractMemory.c', line 201

static VALUE
memory_get_array_of_string(int argc, VALUE* argv, VALUE self)
{
    VALUE offset = Qnil, countnum = Qnil, retVal = Qnil;
    AbstractMemory* ptr;
    long off;
    int count;

    rb_scan_args(argc, argv, "11", &offset, &countnum);
    off = NUM2LONG(offset);
    count = (countnum == Qnil ? 0 : NUM2INT(countnum));
    retVal = rb_ary_new2(count);

    Data_Get_Struct(self, AbstractMemory, ptr);
    checkRead(ptr);

    if (countnum != Qnil) {
        int i;

        checkBounds(ptr, off, count * sizeof (char*));
        
        for (i = 0; i < count; ++i) {
            const char* strptr = *((const char**) (ptr->address + off) + i);
            rb_ary_push(retVal, (strptr == NULL ? Qnil : rb_tainted_str_new2(strptr)));
        }

    } else {
        checkBounds(ptr, off, sizeof (char*));
        for ( ; off < ptr->size - sizeof (void *); off += sizeof (void *)) {
            const char* strptr = *(const char**) (ptr->address + off);
            if (strptr == NULL) {
                break;
            }
            rb_ary_push(retVal, rb_tainted_str_new2(strptr));
        }
    }

    return retVal;
}

#get_bytes(offset, length) ⇒ Object 



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# File 'ext/ffi_c/AbstractMemory.c', line 264

static VALUE
memory_get_bytes(VALUE self, VALUE offset, VALUE length)
{
    AbstractMemory* ptr = MEMORY(self);
    long off, len;
    
    off = NUM2LONG(offset);
    len = NUM2LONG(length);

    checkRead(ptr);
    checkBounds(ptr, off, len);
    
    return rb_tainted_str_new((char *) ptr->address + off, len);
}

#get_float32 ⇒ Object Also known as: get_float

#get_float64 ⇒ Object Also known as: get_double

#get_pointer ⇒ Object

#get_string(*args) ⇒ Object 



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# File 'ext/ffi_c/AbstractMemory.c', line 182

static VALUE
memory_get_string(int argc, VALUE* argv, VALUE self)
{
    VALUE length = Qnil, offset = Qnil;
    AbstractMemory* ptr = MEMORY(self);
    long off, len;
    char* end;
    int nargs = rb_scan_args(argc, argv, "11", &offset, &length);

    off = NUM2LONG(offset);
    len = nargs > 1 && length != Qnil ? NUM2LONG(length) : (ptr->size - off);
    checkRead(ptr);
    checkBounds(ptr, off, len);

    end = memchr(ptr->address + off, 0, len);
    return rb_tainted_str_new((char *) ptr->address + off,
            (end != NULL ? end - ptr->address - off : len));
}

#put_array_of_float32 ⇒ Object Also known as: put_array_of_float

#put_array_of_float64 ⇒ Object Also known as: put_array_of_double

#put_array_of_pointer ⇒ Object

#put_bytes(*args) ⇒ Object 



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# File 'ext/ffi_c/AbstractMemory.c', line 279

static VALUE
memory_put_bytes(int argc, VALUE* argv, VALUE self)
{
    AbstractMemory* ptr = MEMORY(self);
    VALUE offset = Qnil, str = Qnil, rbIndex = Qnil, rbLength = Qnil;
    long off, len, idx;
    int nargs = rb_scan_args(argc, argv, "22", &offset, &str, &rbIndex, &rbLength);

    Check_Type(str, T_STRING);

    off = NUM2LONG(offset);
    idx = nargs > 2 ? NUM2LONG(rbIndex) : 0;
    if (idx < 0) {
        rb_raise(rb_eRangeError, "index canot be less than zero");
    }
    len = nargs > 3 ? NUM2LONG(rbLength) : (RSTRING_LEN(str) - idx);
    if ((idx + len) > RSTRING_LEN(str)) {
        rb_raise(rb_eRangeError, "index+length is greater than size of string");
    }

    checkWrite(ptr);
    checkBounds(ptr, off, len);

    if (rb_safe_level() >= 1 && OBJ_TAINTED(str)) {
        rb_raise(rb_eSecurityError, "Writing unsafe string to memory");
    }
    memcpy(ptr->address + off, RSTRING_PTR(str) + idx, len);

    return self;
}

#put_float32 ⇒ Object Also known as: put_float

#put_float64 ⇒ Object Also known as: put_double

#put_pointer ⇒ Object

#put_string(offset, str) ⇒ Object 



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# File 'ext/ffi_c/AbstractMemory.c', line 241

static VALUE
memory_put_string(VALUE self, VALUE offset, VALUE str)
{
    AbstractMemory* ptr = MEMORY(self);
    long off, len;

    Check_Type(str, T_STRING);
    off = NUM2LONG(offset);
    len = RSTRING_LEN(str);

    checkWrite(ptr);
    checkBounds(ptr, off, len + 1);
    
    if (rb_safe_level() >= 1 && OBJ_TAINTED(str)) {
        rb_raise(rb_eSecurityError, "Writing unsafe string to memory");
    }

    memcpy(ptr->address + off, RSTRING_PTR(str), len);
    *((char *) ptr->address + off + len) = '\0';

    return self;
}

#total ⇒ Object Also known as: size 



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# File 'ext/ffi_c/AbstractMemory.c', line 172

static VALUE
memory_size(VALUE self) 
{
    AbstractMemory* ptr;

    Data_Get_Struct(self, AbstractMemory, ptr);

    return LONG2NUM(ptr->size);
}

#type_size ⇒ Object 



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# File 'ext/ffi_c/AbstractMemory.c', line 310

static VALUE
memory_type_size(VALUE self)
{
    AbstractMemory* ptr;

    Data_Get_Struct(self, AbstractMemory, ptr);

    return INT2NUM(ptr->typeSize);
}