diff options
Diffstat (limited to 'libobjc/ivars.c')
| -rw-r--r-- | libobjc/ivars.c | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/libobjc/ivars.c b/libobjc/ivars.c new file mode 100644 index 00000000000..18c6e8af29d --- /dev/null +++ b/libobjc/ivars.c @@ -0,0 +1,151 @@ +/* GNU Objective C Runtime ivar related functions. + Copyright (C) 2010 Free Software Foundation, Inc. + Contributed by Nicola Pero + +This file is part of GCC. + +GCC 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 3, or (at your option) any later version. + +GCC 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. + +Under Section 7 of GPL version 3, you are granted additional +permissions described in the GCC Runtime Library Exception, version +3.1, as published by the Free Software Foundation. + +You should have received a copy of the GNU General Public License and +a copy of the GCC Runtime Library Exception along with this program; +see the files COPYING3 and COPYING.RUNTIME respectively. If not, see +<http://www.gnu.org/licenses/>. */ + +#include "objc-private/common.h" +#include "objc/objc.h" +#include "objc/objc-api.h" +#include "objc-private/runtime.h" /* the kitchen sink */ +#include <string.h> /* For strcmp */ + +struct objc_ivar * +class_getInstanceVariable (Class class_, const char *name) +{ + if (class_ != Nil && name != NULL) + { + objc_mutex_lock (__objc_runtime_mutex); + while (class_ != Nil) + { + struct objc_ivar_list *ivars = class_->ivars; + if (ivars != NULL) + { + int i; + + for (i = 0; i < ivars->ivar_count; i++) + { + struct objc_ivar *ivar = &(ivars->ivar_list[i]); + + if (!strcmp (ivar->ivar_name, name)) + { + objc_mutex_unlock (__objc_runtime_mutex); + return ivar; + } + } + } + class_ = class_->super_class; + } + objc_mutex_unlock (__objc_runtime_mutex); + } + return NULL; +} + +void * +object_getIndexedIvars (id object) +{ + if (object == nil) + return NULL; + else + { + return (void *)(((char *)object) + + object->class_pointer->instance_size); + } +} + +struct objc_ivar * +object_getInstanceVariable (id object, const char *name, void **returnValue) +{ + if (object == nil || name == NULL) + return NULL; + else + { + struct objc_ivar * variable = class_getInstanceVariable (object->class_pointer, name); + + if (variable != NULL && returnValue != NULL) + { + char *location = (char *)object + variable->ivar_offset; + + *returnValue = *((id *)location); + } + + return variable; + } +} + +struct objc_ivar * +object_setInstanceVariable (id object, const char *name, void *newValue) +{ + if (object == nil || name == NULL) + return NULL; + else + { + struct objc_ivar * variable = class_getInstanceVariable (object->class_pointer, name); + + if (variable != NULL) + { + char *location = (char *)object + variable->ivar_offset; + + *((id *)location) = (id)newValue; + } + + return variable; + } +} + +id object_getIvar (id object, struct objc_ivar * variable) +{ + if (object == nil || variable == NULL) + return nil; + else + { + char *location = (char *)object + variable->ivar_offset; + + return *((id *)location); + } +} + +void object_setIvar (id object, struct objc_ivar * variable, id value) +{ + if (object == nil || variable == NULL) + return; + else + { + char *location = (char *)object + variable->ivar_offset; + + *((id *)location) = value; + } +} + +const char * ivar_getName (struct objc_ivar * variable) +{ + return variable->ivar_name; +} + +ptrdiff_t ivar_getOffset (struct objc_ivar * variable) +{ + return (ptrdiff_t)(variable->ivar_offset); +} + +const char * ivar_getTypeEncoding (struct objc_ivar * variable) +{ + return variable->ivar_type; +} |