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 {
  47         struct declaration_integer *integer_declaration;
  48
  49         integer_declaration = g_new(struct declaration_integer, 1);
  50         integer_declaration->p.id = CTF_TYPE_INTEGER;
  51         integer_declaration->p.alignment = alignment;
  52         integer_declaration->p.declaration_free = _integer_declaration_free;
  53         integer_declaration->p.definition_free = _integer_definition_free;
  54         integer_declaration->p.definition_new = _integer_definition_new;
  55         integer_declaration->p.ref = 1;
  56         integer_declaration->len = len;
  57         integer_declaration->byte_order = byte_order;
  58         integer_declaration->signedness = signedness;
  59         integer_declaration->base = base;
  60         integer_declaration->encoding = encoding;
  61         return integer_declaration;
  62 }
  63
  64 static
  65 struct definition *
  66         _integer_definition_new(struct declaration *declaration,
  67                                 struct definition_scope *parent_scope,
  68                                 GQuark field_name, int index,
  69                                 const char *root_name)
  70 {
  71         struct declaration_integer *integer_declaration =
  72                 container_of(declaration, struct declaration_integer, p);
  73         struct definition_integer *integer;
  74         int ret;
  75
  76         integer = g_new(struct definition_integer, 1);
  77         declaration_ref(&integer_declaration->p);
  78         integer->p.declaration = declaration;
  79         integer->declaration = integer_declaration;
  80         integer->p.ref = 1;
  81         /*
  82          * Use INT_MAX order to ensure that all fields of the parent
  83          * scope are seen as being prior to this scope.
  84          */
  85         integer->p.index = root_name ? INT_MAX : index;
  86         integer->p.name = field_name;
  87         integer->p.path = new_definition_path(parent_scope, field_name,
  88                                         root_name);
  89         integer->p.scope = NULL;
  90         integer->value._unsigned = 0;
  91         ret = register_field_definition(field_name, &integer->p,
  92                                         parent_scope);
  93         assert(!ret);
  94         return &integer->p;
  95 }
  96
  97 static
  98 void _integer_definition_free(struct definition *definition)
  99 {
 100         struct definition_integer *integer =
 101                 container_of(definition, struct definition_integer, p);
 102
 103         declaration_unref(integer->p.declaration);
 104         g_free(integer);
 105 }
 106
 107 uint64_t get_unsigned_int(struct definition *field)
 108 {
 109         struct definition_integer *integer_definition;
 110         const struct declaration_integer *integer_declaration;
 111
 112         integer_definition = container_of(field, struct definition_integer, p);
 113         integer_declaration = integer_definition->declaration;
 114
 115         if (!integer_declaration->signedness) {
 116                 return integer_definition->value._unsigned;
 117         }
 118         fprintf(stderr, "[warning] Extracting unsigned value in a signed int\n");
 119         return (uint64_t)integer_definition->value._signed;
 120 }
 121
 122 int64_t get_signed_int(struct definition *field)
 123 {
 124         struct definition_integer *integer_definition;
 125         const struct declaration_integer *integer_declaration;
 126
 127         integer_definition = container_of(field, struct definition_integer, p);
 128         integer_declaration = integer_definition->declaration;
 129
 130         if (integer_declaration->signedness) {
 131                 return integer_definition->value._signed;
 132         }
 133         fprintf(stderr, "[warning] Extracting signed value in an unsigned int\n");
 134         return (int64_t)integer_definition->value._unsigned;
 135 }