| 1 | /* This file is part of the Linux Trace Toolkit viewer |
| 2 | * Copyright (C) 2003-2004 Michel Dagenais |
| 3 | * |
| 4 | * This program is free software; you can redistribute it and/or modify |
| 5 | * it under the terms of the GNU General Public License Version 2 as |
| 6 | * published by the Free Software Foundation; |
| 7 | * |
| 8 | * This program is distributed in the hope that it will be useful, |
| 9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 11 | * GNU General Public License for more details. |
| 12 | * |
| 13 | * You should have received a copy of the GNU General Public License |
| 14 | * along with this program; if not, write to the Free Software |
| 15 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
| 16 | * MA 02111-1307, USA. |
| 17 | */ |
| 18 | |
| 19 | #ifndef IATTRIBUTE_H |
| 20 | #define IATTRIBUTE_H |
| 21 | |
| 22 | |
| 23 | #include <glib-object.h> |
| 24 | #include <ltt/time.h> |
| 25 | |
| 26 | /* The content of a data structure may be seen as an array of pairs of |
| 27 | attribute name and value. This simple model allows generic navigation |
| 28 | and access functions over a wide range of structures. The names are |
| 29 | represented by unique integer identifiers, GQuarks. */ |
| 30 | |
| 31 | typedef GQuark LttvAttributeName; |
| 32 | |
| 33 | typedef enum _LttvAttributeType { |
| 34 | LTTV_INT, LTTV_UINT, LTTV_LONG, LTTV_ULONG, LTTV_FLOAT, LTTV_DOUBLE, |
| 35 | LTTV_TIME, LTTV_POINTER, LTTV_STRING, LTTV_GOBJECT, LTTV_NONE |
| 36 | } LttvAttributeType; |
| 37 | |
| 38 | typedef union LttvAttributeValue { |
| 39 | int *v_int; |
| 40 | unsigned *v_uint; |
| 41 | long *v_long; |
| 42 | unsigned long *v_ulong; |
| 43 | float *v_float; |
| 44 | double *v_double; |
| 45 | LttTime *v_time; |
| 46 | gpointer *v_pointer; |
| 47 | char **v_string; |
| 48 | GObject **v_gobject; |
| 49 | } LttvAttributeValue; |
| 50 | |
| 51 | |
| 52 | /* GObject interface type macros */ |
| 53 | |
| 54 | #define LTTV_IATTRIBUTE_TYPE (lttv_iattribute_get_type ()) |
| 55 | #define LTTV_IATTRIBUTE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), LTTV_IATTRIBUTE_TYPE, LttvIAttribute)) |
| 56 | #define LTTV_IATTRIBUTE_CLASS(vtable) (G_TYPE_CHECK_CLASS_CAST ((vtable), LTTV_IATTRIBUTE_TYPE, LttvIAttributeClass)) |
| 57 | #define LTTV_IS_IATTRIBUTE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), LTTV_IATTRIBUTE_TYPE)) |
| 58 | #define LTTV_IS_IATTRIBUTE_CLASS(vtable) (G_TYPE_CHECK_CLASS_TYPE ((vtable), LTTV_IATTRIBUTE_TYPE)) |
| 59 | #define LTTV_IATTRIBUTE_GET_CLASS(inst) (G_TYPE_INSTANCE_GET_INTERFACE ((inst), LTTV_IATTRIBUTE_TYPE, LttvIAttributeClass)) |
| 60 | |
| 61 | |
| 62 | typedef struct _LttvIattribute LttvIAttribute; /* dummy object */ |
| 63 | typedef struct _LttvIAttributeClass LttvIAttributeClass; |
| 64 | |
| 65 | |
| 66 | struct _LttvIAttributeClass { |
| 67 | GTypeInterface parent; |
| 68 | |
| 69 | unsigned int (*get_number) (LttvIAttribute *self); |
| 70 | |
| 71 | gboolean (*named) (LttvIAttribute *self, gboolean *homogeneous); |
| 72 | |
| 73 | LttvAttributeType (*get) (LttvIAttribute *self, unsigned i, |
| 74 | LttvAttributeName *name, LttvAttributeValue *v); |
| 75 | |
| 76 | LttvAttributeType (*get_by_name) (LttvIAttribute *self, |
| 77 | LttvAttributeName name, LttvAttributeValue *v); |
| 78 | |
| 79 | LttvAttributeValue (*add) (LttvIAttribute *self, LttvAttributeName name, |
| 80 | LttvAttributeType t); |
| 81 | |
| 82 | void (*remove) (LttvIAttribute *self, unsigned i); |
| 83 | |
| 84 | void (*remove_by_name) (LttvIAttribute *self, |
| 85 | LttvAttributeName name); |
| 86 | |
| 87 | LttvIAttribute* (*find_subdir) (LttvIAttribute *self, |
| 88 | LttvAttributeName name); |
| 89 | }; |
| 90 | |
| 91 | |
| 92 | GType lttv_iattribute_get_type(void); |
| 93 | |
| 94 | |
| 95 | /* Total number of attributes */ |
| 96 | |
| 97 | unsigned int lttv_iattribute_get_number(LttvIAttribute *self); |
| 98 | |
| 99 | |
| 100 | /* Container type. Named (fields in struct or elements in a hash table) |
| 101 | or unnamed (elements in an array) attributes, homogeneous type or not. */ |
| 102 | |
| 103 | gboolean lttv_iattribute_named(LttvIAttribute *self, gboolean *homogeneous); |
| 104 | |
| 105 | |
| 106 | /* Get the i th attribute along with its type and a pointer to its value. */ |
| 107 | |
| 108 | LttvAttributeType lttv_iattribute_get(LttvIAttribute *self, unsigned i, |
| 109 | LttvAttributeName *name, LttvAttributeValue *v); |
| 110 | |
| 111 | |
| 112 | /* Get the named attribute in the table along with its type and a pointer to |
| 113 | its value. If the named attribute does not exist, the type is LTTV_NONE. */ |
| 114 | |
| 115 | LttvAttributeType lttv_iattribute_get_by_name(LttvIAttribute *self, |
| 116 | LttvAttributeName name, LttvAttributeValue *v); |
| 117 | |
| 118 | |
| 119 | /* Add an attribute, which must not exist. The name is an empty string for |
| 120 | containers with unnamed attributes. Its value is initialized to 0 or NULL |
| 121 | and its pointer returned. */ |
| 122 | |
| 123 | LttvAttributeValue lttv_iattribute_add(LttvIAttribute *self, |
| 124 | LttvAttributeName name, LttvAttributeType t); |
| 125 | |
| 126 | |
| 127 | /* Remove an attribute */ |
| 128 | |
| 129 | void lttv_iattribute_remove(LttvIAttribute *self, unsigned i); |
| 130 | |
| 131 | void lttv_iattribute_remove_by_name(LttvIAttribute *self, |
| 132 | LttvAttributeName name); |
| 133 | |
| 134 | |
| 135 | /* Create an empty iattribute object and add it as an attribute under the |
| 136 | specified name, or return an existing iattribute attribute. If an |
| 137 | attribute of that name already exists but is not a GObject supporting the |
| 138 | iattribute interface, return NULL. */ |
| 139 | |
| 140 | LttvIAttribute* lttv_iattribute_find_subdir(LttvIAttribute *self, |
| 141 | LttvAttributeName name); |
| 142 | |
| 143 | |
| 144 | /* The remaining utility functions are not part of the LttvIAttribute |
| 145 | interface but operate on objects implementing it. */ |
| 146 | |
| 147 | /* Find the named attribute in the table, which must be of the specified type. |
| 148 | If it does not exist, it is created with a default value of 0 (NULL for |
| 149 | pointer types). Since the address of the value is obtained, it may be |
| 150 | changed easily afterwards. The function returns false when the attribute |
| 151 | exists but is of incorrect type. */ |
| 152 | |
| 153 | gboolean lttv_iattribute_find(LttvIAttribute *self, LttvAttributeName name, |
| 154 | LttvAttributeType t, LttvAttributeValue *v); |
| 155 | |
| 156 | |
| 157 | /* Trees of attribute tables may be accessed using a hierarchical path with |
| 158 | components separated by /, like in filesystems */ |
| 159 | |
| 160 | gboolean lttv_iattribute_find_by_path(LttvIAttribute *self, char *path, |
| 161 | LttvAttributeType t, LttvAttributeValue *v); |
| 162 | |
| 163 | |
| 164 | /* Shallow and deep copies */ |
| 165 | |
| 166 | void lttv_iattribute_copy_value(LttvAttributeType t, LttvAttributeValue dest, |
| 167 | LttvAttributeValue src); |
| 168 | |
| 169 | LttvIAttribute *lttv_iattribute_shallow_copy(LttvIAttribute *self); |
| 170 | |
| 171 | LttvIAttribute *lttv_iattribute_deep_copy(LttvIAttribute *self); |
| 172 | |
| 173 | #endif // IATTRIBUTE_H |