mirror of
https://github.com/gnustep/libs-base.git
synced 2025-04-22 16:33:29 +00:00
Tidied and added NSGetSizeAndAlignment().
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@2846 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
Richard Frith-MacDonald
parent
ccb10f035a
commit
1a6c0f94c6
1 changed files with 188 additions and 5 deletions
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@ -29,22 +29,205 @@
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NSString *
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NSStringFromSelector(SEL aSelector)
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{
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return [NSString stringWithCString:sel_get_name(aSelector)];
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if (aSelector != (SEL)0)
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return [NSString stringWithCString: (char*)sel_get_name(aSelector)];
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return nil;
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}
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SEL
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NSSelectorFromString(NSString *aSelectorName)
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{
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return sel_get_any_uid ([aSelectorName cString]);
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if (aSelectorName != nil)
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return sel_get_any_uid ([aSelectorName cString]);
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return (SEL)0;
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}
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Class
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NSClassFromString(NSString *aClassName)
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{
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return objc_lookup_class ([aClassName cString]);
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if (aClassName != nil)
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return objc_lookup_class ([aClassName cString]);
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return (Class)0;
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}
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NSString *NSStringFromClass(Class aClass)
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NSString *
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NSStringFromClass(Class aClass)
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{
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return [NSString stringWithCString:class_get_class_name(aClass)];
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if (aClass != (Class)0)
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return [NSString stringWithCString: (char*)class_get_class_name(aClass)];
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return nil;
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}
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#ifdef MAX
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#undef MAX
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#endif
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#define MAX(X, Y) \
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({ typeof(X) __x = (X), __y = (Y); \
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(__x > __y ? __x : __y); })
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#ifdef ROUND
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#undef ROUND
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#endif
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#define ROUND(V, A) \
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({ typeof(V) __v=(V); typeof(A) __a=(A); \
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__a*((__v+__a-1)/__a); })
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/* This function was built by copying and modifying code from the objc runtime
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* rather than calling the objc runtime functions directly. I did this for
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* efficiency, and because the existing runtime can't cope with 'void'.
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*/
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const char *
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NSGetSizeAndAlignment(const char *typePtr, unsigned *sizep, unsigned *alignp)
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{
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unsigned int size;
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unsigned int align;
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/* Skip any leading type qualifiers */
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while (*typePtr == _C_CONST
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|| *typePtr == _C_IN
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|| *typePtr == _C_INOUT
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|| *typePtr == _C_OUT
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|| *typePtr == _C_BYCOPY
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#ifdef _C_BYREF
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|| *typePtr == _C_BYREF
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#endif
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|| *typePtr == _C_ONEWAY)
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{
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typePtr++;
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}
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switch(*typePtr++)
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{
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case _C_ID:
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size = sizeof(id);
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align = __alignof__(id);
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break;
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case _C_CLASS:
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size = sizeof(Class);
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align = __alignof__(Class);
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break;
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case _C_SEL:
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size = sizeof(SEL);
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align = __alignof__(SEL);
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break;
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case _C_CHR:
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size = sizeof(char);
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align = __alignof__(char);
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break;
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case _C_UCHR:
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size = sizeof(unsigned char);
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align = __alignof__(unsigned char);
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break;
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case _C_SHT:
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size = sizeof(short);
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align = __alignof__(short);
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break;
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case _C_USHT:
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size = sizeof(unsigned short);
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align = __alignof__(unsigned short);
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break;
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case _C_INT:
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size = sizeof(int);
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align = __alignof__(int);
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break;
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case _C_UINT:
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size = sizeof(unsigned int);
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align = __alignof__(unsigned int);
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break;
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case _C_LNG:
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size = sizeof(long);
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align = __alignof__(long);
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break;
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case _C_ULNG:
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size = sizeof(unsigned long);
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align = __alignof__(unsigned long);
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break;
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case _C_FLT:
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size = sizeof(float);
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align = __alignof__(float);
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break;
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case _C_DBL:
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size = sizeof(double);
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align = __alignof__(double);
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break;
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case _C_PTR:
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case _C_ATOM:
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case _C_CHARPTR:
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size = sizeof(char*);
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align = __alignof__(char*);
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break;
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case _C_ARY_B:
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{
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int len = atoi(typePtr);
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while (isdigit(*typePtr))
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typePtr++;
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typePtr = NSGetSizeAndAlignment(typePtr, &size, &align);
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size *= len;
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}
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break;
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case _C_STRUCT_B:
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{
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struct { int x; double y; } fooalign;
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int a;
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int s;
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align = __alignof__(fooalign);
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size = 0;
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while (*typePtr != _C_STRUCT_E && *typePtr++ != '=');
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while (*typePtr != _C_STRUCT_E)
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{
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typePtr = NSGetSizeAndAlignment(typePtr, &s, &a);
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align = MAX (align, a);
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size = ROUND (size, a);
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size += s; /* add component size */
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}
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typePtr++;
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}
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case _C_UNION_B:
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{
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int a;
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int s;
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align = 0;
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size = 0;
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while (*typePtr != _C_STRUCT_E && *typePtr++ != '=');
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while (*typePtr != _C_STRUCT_E)
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{
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typePtr = NSGetSizeAndAlignment(typePtr, &s, &a);
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align = MAX (align, a);
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size = MAX (size, s);
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}
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typePtr++;
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}
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case _C_VOID:
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size = 0;
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align = 1;
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break;
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default:
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return 0; /* Unknown type. */
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}
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if (alignp)
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*alignp = align;
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if (sizep)
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*sizep = size;
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return typePtr;
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}
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