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/* Encoding of types for Objective C.
Copyright (C) 1993 Free Software Foundation, Inc.
Author: Kresten Krab Thorup
This file is part of GNU CC.
GNU CC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2, or (at your option)
any later version.
GNU CC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with GNU CC; see the file COPYING. If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
/* As a special exception, if you link this library with files
compiled with GCC to produce an executable, this does not cause
the resulting executable to be covered by the GNU General Public License.
This exception does not however invalidate any other reasons why
the executable file might be covered by the GNU General Public License. */
#ifndef GNU_FOUNDATION
#include <objc/objc.h>
/* cannot include objc-class because it has ObjC definitions in it */
#define _C_ID '@'
#define _C_CLASS '#'
#define _C_SEL ':'
#define _C_CHR 'c'
#define _C_UCHR 'C'
#define _C_SHT 's'
#define _C_USHT 'S'
#define _C_INT 'i'
#define _C_UINT 'I'
#define _C_LNG 'l'
#define _C_ULNG 'L'
#define _C_FLT 'f'
#define _C_DBL 'd'
#define _C_BFLD 'b'
#define _C_VOID 'v'
#define _C_UNDEF '?'
#define _C_PTR '^'
#define _C_CHARPTR '*'
#define _C_ARY_B '['
#define _C_ARY_E ']'
#define _C_UNION_B '('
#define _C_UNION_E ')'
#define _C_STRUCT_B '{'
#define _C_STRUCT_E '}'
#define _C_ATOM '%'
#else
# include <objc/objc-api.h>
#endif
#include <ctype.h>
#include "MathArray/array_encoding.h"
#define _C_CONST 'r'
#define _C_IN 'n'
#define _C_INOUT 'N'
#define _C_OUT 'o'
#define _C_BYCOPY 'O'
#define _C_ONEWAY 'V'
#define MAX(X, Y) \
({ typeof(X) __x = (X), __y = (Y); \
(__x > __y ? __x : __y); })
#define MIN(X, Y) \
({ typeof(X) __x = (X), __y = (Y); \
(__x < __y ? __x : __y); })
#define ROUND(V, A) \
({ typeof(V) __v=(V); typeof(A) __a=(A); \
__a*((__v+__a-1)/__a); })
static const char* math_skip_type_qualifiers (const char* type);
static const char* math_skip_offset (const char* type);
static const char* math_skip_argspec (const char* type);
static inline int
ma_atoi (const char* str)
{
int res = 0;
while (isdigit (*str))
res *= 10, res += (*str++ - '0');
return res;
}
/*
return the size of an object specified by type
*/
int
math_sizeof_type(const char* type)
{
switch(*type) {
case _C_ID:
return sizeof(id);
break;
case _C_CLASS:
return sizeof(Class*);
break;
case _C_SEL:
return sizeof(SEL);
break;
case _C_CHR:
return sizeof(char);
break;
case _C_UCHR:
return sizeof(unsigned char);
break;
case _C_SHT:
return sizeof(short);
break;
case _C_USHT:
return sizeof(unsigned short);
break;
case _C_INT:
return sizeof(int);
break;
case _C_UINT:
return sizeof(unsigned int);
break;
case _C_LNG:
return sizeof(long);
break;
case _C_ULNG:
return sizeof(unsigned long);
break;
case _C_FLT:
return sizeof(float);
break;
case _C_DBL:
return sizeof(double);
break;
case _C_PTR:
case _C_ATOM:
case _C_CHARPTR:
return sizeof(char*);
break;
case _C_ARY_B:
{
int len = ma_atoi(type+1);
while (isdigit(*++type));
return len*math_aligned_size (type);
}
break;
case _C_STRUCT_B:
{
int acc_size = 0;
int align;
while (*type != _C_STRUCT_E && *type++ != '='); /* skip "<name>=" */
while (*type != _C_STRUCT_E)
{
align = math_alignof_type (type); /* padd to alignment */
acc_size = ROUND (acc_size, align);
acc_size += math_sizeof_type (type); /* add component size */
type = math_skip_typespec (type); /* skip component */
}
return acc_size;
}
case _C_UNION_B:
{
int max_size = 0;
while (*type != _C_UNION_E && *type++ != '=') /* do nothing */;
while (*type != _C_UNION_E)
{
max_size = MAX (max_size, math_sizeof_type (type));
type = math_skip_typespec (type);
}
return max_size;
}
default:
abort();
}
}
/*
Return the alignment of an object specified by type
*/
int
math_alignof_type(const char* type)
{
switch(*type) {
case _C_ID:
return __alignof__(id);
break;
case _C_CLASS:
return __alignof__(Class*);
break;
case _C_SEL:
return __alignof__(SEL);
break;
case _C_CHR:
return __alignof__(char);
break;
case _C_UCHR:
return __alignof__(unsigned char);
break;
case _C_SHT:
return __alignof__(short);
break;
case _C_USHT:
return __alignof__(unsigned short);
break;
case _C_INT:
return __alignof__(int);
break;
case _C_UINT:
return __alignof__(unsigned int);
break;
case _C_LNG:
return __alignof__(long);
break;
case _C_ULNG:
return __alignof__(unsigned long);
break;
case _C_FLT:
return __alignof__(float);
break;
case _C_DBL:
return __alignof__(double);
break;
case _C_ATOM:
case _C_CHARPTR:
return __alignof__(char*);
break;
case _C_ARY_B:
while (isdigit(*++type)) /* do nothing */;
return math_alignof_type (type);
case _C_STRUCT_B:
{
struct { int x; double y; } fooalign;
while(*type != _C_STRUCT_E && *type++ != '=') /* do nothing */;
if (*type != _C_STRUCT_E)
return MAX (math_alignof_type (type), __alignof__ (fooalign));
else
return __alignof__ (fooalign);
}
case _C_UNION_B:
{
int maxalign = 0;
while (*type != _C_UNION_E && *type++ != '=') /* do nothing */;
while (*type != _C_UNION_E)
{
maxalign = MAX (maxalign, math_alignof_type (type));
type = math_skip_typespec (type);
}
return maxalign;
}
default:
abort();
}
}
/*
The aligned size if the size rounded up to the nearest alignment.
*/
int
math_aligned_size (const char* type)
{
int size = math_sizeof_type (type);
int align = math_alignof_type (type);
return ROUND (size, align);
}
/*
The size rounded up to the nearest integral of the wordsize, taken
to be the size of a void*.
*/
int
math_promoted_size (const char* type)
{
int size = math_sizeof_type (type);
int wordsize = sizeof (void*);
return ROUND (size, wordsize);
}
/*
Skip type qualifiers. These may eventually precede typespecs
occuring in method prototype encodings.
*/
static inline const char*
math_skip_type_qualifiers (const char* type)
{
while (*type == _C_CONST
|| *type == _C_IN
|| *type == _C_INOUT
|| *type == _C_OUT
|| *type == _C_BYCOPY
|| *type == _C_ONEWAY)
{
type += 1;
}
return type;
}
/*
Skip one typespec element. If the typespec is prepended by type
qualifiers, these are skipped as well.
*/
const char*
math_skip_typespec (const char* type)
{
type = math_skip_type_qualifiers (type);
switch (*type) {
case _C_ID:
/* An id may be annotated by the actual type if it is known
with the @"ClassName" syntax */
if (*++type != '"')
return type;
else
{
while (*++type != '"') /* do nothing */;
return type + 1;
}
/* The following are one character type codes */
case _C_CLASS:
case _C_SEL:
case _C_CHR:
case _C_UCHR:
case _C_CHARPTR:
case _C_ATOM:
case _C_SHT:
case _C_USHT:
case _C_INT:
case _C_UINT:
case _C_LNG:
case _C_ULNG:
case _C_FLT:
case _C_DBL:
case _C_VOID:
return ++type;
break;
case _C_ARY_B:
/* skip digits, typespec and closing ']' */
while(isdigit(*++type));
type = math_skip_typespec(type);
if (*type == _C_ARY_E)
return ++type;
else
abort();
case _C_STRUCT_B:
/* skip name, and elements until closing '}' */
while (*type != _C_STRUCT_E && *type++ != '=');
while (*type != _C_STRUCT_E) { type = math_skip_typespec (type); }
return ++type;
case _C_UNION_B:
/* skip name, and elements until closing ')' */
while (*type != _C_UNION_E && *type++ != '=');
while (*type != _C_UNION_E) { type = math_skip_typespec (type); }
return ++type;
case _C_PTR:
/* Just skip the following typespec */
return math_skip_typespec (++type);
default:
abort();
}
}
/*
Skip an offset as part of a method encoding. This is prepended by a
'+' if the argument is passed in registers.
*/
static inline const char*
math_skip_offset (const char* type)
{
if (*type == '+') type++;
while(isdigit(*++type));
return type;
}
/*
Skip an argument specification of a method encoding.
*/
static const char*
math_skip_argspec (const char* type)
{
type = math_skip_typespec (type);
type = math_skip_offset (type);
return type;
}
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