types/integer.c

   1 /*
   2  * integer.c
   3  *
   4  * BabelTrace - Integer Type Converter
   5  *
   6  * Copyright 2010-2011 EfficiOS Inc. and Linux Foundation
   7  *
   8  * Author: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
   9  *
  10  * Permission is hereby granted, free of charge, to any person obtaining a copy
  11  * of this software and associated documentation files (the "Software"), to deal
  12  * in the Software without restriction, including without limitation the rights
  13  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  14  * copies of the Software, and to permit persons to whom the Software is
  15  * furnished to do so, subject to the following conditions:
  16  *
  17  * The above copyright notice and this permission notice shall be included in
  18  * all copies or substantial portions of the Software.
  19  */
  20
  21 #include <babeltrace/compiler.h>
  22 #include <babeltrace/align.h>
  23 #include <babeltrace/format.h>
  24 #include <stdint.h>
  25
  26 static
  27 struct definition *_integer_definition_new(struct declaration *declaration,
  28                                struct definition_scope *parent_scope,
  29                                GQuark field_name, int index,
  30                                const char *root_name);
  31 static
  32 void _integer_definition_free(struct definition *definition);
  33
  34 static
  35 void _integer_declaration_free(struct declaration *declaration)
  36 {
  37         struct declaration_integer *integer_declaration =
  38                 container_of(declaration, struct declaration_integer, p);
  39         g_free(integer_declaration);
  40 }
  41
  42 struct declaration_integer *
  43         integer_declaration_new(size_t len, int byte_order,
  44                          int signedness, size_t alignment, int base,
  45                          enum ctf_string_encoding encoding,
  46                          struct ctf_clock *clock)
  47 {
  48         struct declaration_integer *integer_declaration;
  49
  50         integer_declaration = g_new(struct declaration_integer, 1);
  51         integer_declaration->p.id = CTF_TYPE_INTEGER;
  52         integer_declaration->p.alignment = alignment;
  53         integer_declaration->p.declaration_free = _integer_declaration_free;
  54         integer_declaration->p.definition_free = _integer_definition_free;
  55         integer_declaration->p.definition_new = _integer_definition_new;
  56         integer_declaration->p.ref = 1;
  57         integer_declaration->len = len;
  58         integer_declaration->byte_order = byte_order;
  59         integer_declaration->signedness = signedness;
  60         integer_declaration->base = base;
  61         integer_declaration->encoding = encoding;
  62         integer_declaration->clock = clock;
  63         return integer_declaration;
  64 }
  65
  66 static
  67 struct definition *
  68         _integer_definition_new(struct declaration *declaration,
  69                                 struct definition_scope *parent_scope,
  70                                 GQuark field_name, int index,
  71                                 const char *root_name)
  72 {
  73         struct declaration_integer *integer_declaration =
  74                 container_of(declaration, struct declaration_integer, p);
  75         struct definition_integer *integer;
  76         int ret;
  77
  78         integer = g_new(struct definition_integer, 1);
  79         declaration_ref(&integer_declaration->p);
  80         integer->p.declaration = declaration;
  81         integer->declaration = integer_declaration;
  82         integer->p.ref = 1;
  83         /*
  84          * Use INT_MAX order to ensure that all fields of the parent
  85          * scope are seen as being prior to this scope.
  86          */
  87         integer->p.index = root_name ? INT_MAX : index;
  88         integer->p.name = field_name;
  89         integer->p.path = new_definition_path(parent_scope, field_name,
  90                                         root_name);
  91         integer->p.scope = NULL;
  92         integer->value._unsigned = 0;
  93         ret = register_field_definition(field_name, &integer->p,
  94                                         parent_scope);
  95         assert(!ret);
  96         return &integer->p;
  97 }
  98
  99 static
 100 void _integer_definition_free(struct definition *definition)
 101 {
 102         struct definition_integer *integer =
 103                 container_of(definition, struct definition_integer, p);
 104
 105         declaration_unref(integer->p.declaration);
 106         g_free(integer);
 107 }
 108
 109 uint64_t get_unsigned_int(struct definition *field)
 110 {
 111         struct definition_integer *integer_definition;
 112         const struct declaration_integer *integer_declaration;
 113
 114         integer_definition = container_of(field, struct definition_integer, p);
 115         integer_declaration = integer_definition->declaration;
 116
 117         if (!integer_declaration->signedness) {
 118                 return integer_definition->value._unsigned;
 119         }
 120         fprintf(stderr, "[warning] Extracting unsigned value in a signed int\n");
 121         return (uint64_t)integer_definition->value._signed;
 122 }
 123
 124 int64_t get_signed_int(struct definition *field)
 125 {
 126         struct definition_integer *integer_definition;
 127         const struct declaration_integer *integer_declaration;
 128
 129         integer_definition = container_of(field, struct definition_integer, p);
 130         integer_declaration = integer_definition->declaration;
 131
 132         if (integer_declaration->signedness) {
 133                 return integer_definition->value._signed;
 134         }
 135         fprintf(stderr, "[warning] Extracting signed value in an unsigned int\n");
 136         return (int64_t)integer_definition->value._unsigned;
 137 }