comparison: libgaim/plugins/tcl/tcl_ref.c
libgaim/plugins/tcl/tcl_ref.c
- branch
- cpw.khc.msnp14
- changeset 20472
- 6a6d2ef151e6
- parent 13827
- 6a6c8e70411c
- parent 14254
- 77edc7a6191a
equal
deleted
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| 13912:463b4fa9f067 | 20472:6a6d2ef151e6 |
|---|---|
| 1 /** | |
| 2 * @file tcl_ref.c Gaim Tcl typed references API | |
| 3 * | |
| 4 * gaim | |
| 5 * | |
| 6 * Copyright (C) 2006 Ethan Blanton <eblanton@cs.purdue.edu> | |
| 7 * | |
| 8 * This program is free software; you can redistribute it and/or modify | |
| 9 * it under the terms of the GNU General Public License as published by | |
| 10 * the Free Software Foundation; either version 2 of the License, or | |
| 11 * (at your option) any later version. | |
| 12 * | |
| 13 * This program is distributed in the hope that it will be useful, | |
| 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
| 16 * GNU General Public License for more details. | |
| 17 * | |
| 18 * You should have received a copy of the GNU General Public License | |
| 19 * along with this program; if not, write to the Free Software | |
| 20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 21 */ | |
| 22 | |
| 23 #include <tcl.h> | |
| 24 #include <glib.h> | |
| 25 | |
| 26 #include "tcl_gaim.h" | |
| 27 #include "stringref.h" | |
| 28 | |
| 29 /* Instead of all that internal representation mumbo jumbo, use these | |
| 30 * macros to access the internal representation of a GaimTclRef */ | |
| 31 #define OBJ_REF_TYPE(obj) (obj->internalRep.twoPtrValue.ptr1) | |
| 32 #define OBJ_REF_VALUE(obj) (obj->internalRep.twoPtrValue.ptr2) | |
| 33 | |
| 34 static Tcl_FreeInternalRepProc gaim_tcl_ref_free; | |
| 35 static Tcl_DupInternalRepProc gaim_tcl_ref_dup; | |
| 36 static Tcl_UpdateStringProc gaim_tcl_ref_update; | |
| 37 static Tcl_SetFromAnyProc gaim_tcl_ref_set; | |
| 38 | |
| 39 static Tcl_ObjType gaim_tcl_ref = { | |
| 40 "GaimTclRef", | |
| 41 gaim_tcl_ref_free, | |
| 42 gaim_tcl_ref_dup, | |
| 43 gaim_tcl_ref_update, | |
| 44 gaim_tcl_ref_set | |
| 45 }; | |
| 46 | |
| 47 void gaim_tcl_ref_init() | |
| 48 { | |
| 49 Tcl_RegisterObjType(&gaim_tcl_ref); | |
| 50 } | |
| 51 | |
| 52 void *gaim_tcl_ref_get(Tcl_Interp *interp, Tcl_Obj *obj, GaimStringref *type) | |
| 53 { | |
| 54 if (obj->typePtr != &gaim_tcl_ref) { | |
| 55 if (Tcl_ConvertToType(interp, obj, &gaim_tcl_ref) != TCL_OK) | |
| 56 return NULL; | |
| 57 } | |
| 58 if (strcmp(gaim_stringref_value(OBJ_REF_TYPE(obj)), | |
| 59 gaim_stringref_value(type))) { | |
| 60 if (interp) { | |
| 61 Tcl_Obj *error = Tcl_NewStringObj("Bad Gaim reference type: expected ", -1); | |
| 62 Tcl_AppendToObj(error, gaim_stringref_value(type), -1); | |
| 63 Tcl_AppendToObj(error, " but got ", -1); | |
| 64 Tcl_AppendToObj(error, gaim_stringref_value(OBJ_REF_TYPE(obj)), -1); | |
| 65 Tcl_SetObjResult(interp, error); | |
| 66 } | |
| 67 return NULL; | |
| 68 } | |
| 69 return OBJ_REF_VALUE(obj); | |
| 70 } | |
| 71 | |
| 72 Tcl_Obj *gaim_tcl_ref_new(GaimStringref *type, void *value) | |
| 73 { | |
| 74 Tcl_Obj *obj = Tcl_NewObj(); | |
| 75 obj->typePtr = &gaim_tcl_ref; | |
| 76 OBJ_REF_TYPE(obj) = gaim_stringref_ref(type); | |
| 77 OBJ_REF_VALUE(obj) = value; | |
| 78 Tcl_InvalidateStringRep(obj); | |
| 79 return obj; | |
| 80 } | |
| 81 | |
| 82 static void gaim_tcl_ref_free(Tcl_Obj *obj) | |
| 83 { | |
| 84 gaim_stringref_unref(OBJ_REF_TYPE(obj)); | |
| 85 } | |
| 86 | |
| 87 static void gaim_tcl_ref_dup(Tcl_Obj *obj1, Tcl_Obj *obj2) | |
| 88 { | |
| 89 OBJ_REF_TYPE(obj2) = gaim_stringref_ref(OBJ_REF_TYPE(obj1)); | |
| 90 OBJ_REF_VALUE(obj2) = OBJ_REF_VALUE(obj1); | |
| 91 } | |
| 92 | |
| 93 static void gaim_tcl_ref_update(Tcl_Obj *obj) | |
| 94 { | |
| 95 /* This is ugly on memory, but we pretty much have to either | |
| 96 * do this or guesstimate lengths or introduce a varargs | |
| 97 * function in here ... ugh. */ | |
| 98 char *bytes = g_strdup_printf("gaim-%s:%p", | |
| 99 gaim_stringref_value(OBJ_REF_TYPE(obj)), | |
| 100 OBJ_REF_VALUE(obj)); | |
| 101 | |
| 102 obj->length = strlen(bytes); | |
| 103 obj->bytes = ckalloc(obj->length + 1); | |
| 104 strcpy(obj->bytes, bytes); | |
| 105 g_free(bytes); | |
| 106 } | |
| 107 | |
| 108 /* This isn't as memory-efficient as setting could be, because we | |
| 109 * essentially have to synthesize the Stringref here, where we would | |
| 110 * really rather dup it. Oh, well. */ | |
| 111 static int gaim_tcl_ref_set(Tcl_Interp *interp, Tcl_Obj *obj) | |
| 112 { | |
| 113 char *bytes = Tcl_GetStringFromObj(obj, NULL); | |
| 114 char *ptr; | |
| 115 GaimStringref *type; | |
| 116 void *value; | |
| 117 | |
| 118 if (strlen(bytes) < 7 | |
| 119 || strncmp(bytes, "gaim-", 5) | |
| 120 || (ptr = strchr(bytes, ':')) == NULL | |
| 121 || (ptr - bytes) == 5) | |
| 122 goto badobject; | |
| 123 | |
| 124 /* Bad Ethan */ | |
| 125 *ptr = '\0'; | |
| 126 type = gaim_stringref_new(bytes + 5); | |
| 127 *ptr = ':'; | |
| 128 ptr++; | |
| 129 | |
| 130 if (sscanf(ptr, "%p", &value) == 0) { | |
| 131 gaim_stringref_unref(type); | |
| 132 goto badobject; | |
| 133 } | |
| 134 | |
| 135 /* At this point we know we have a good object; free the old and | |
| 136 * install our internal representation. */ | |
| 137 if (obj->typePtr != NULL && obj->typePtr->freeIntRepProc != NULL) | |
| 138 obj->typePtr->freeIntRepProc(obj); | |
| 139 | |
| 140 obj->typePtr = &gaim_tcl_ref; | |
| 141 OBJ_REF_TYPE(obj) = type; | |
| 142 OBJ_REF_VALUE(obj) = value; | |
| 143 | |
| 144 return TCL_OK; | |
| 145 | |
| 146 badobject: | |
| 147 if (interp) { | |
| 148 Tcl_SetObjResult(interp, | |
| 149 Tcl_NewStringObj("invalid GaimTclRef representation", -1)); | |
| 150 } | |
| 151 return TCL_ERROR; | |
| 152 } |
