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 <babeltrace/types.h>
  25 #include <stdint.h>
  26
  27 static
  28 struct definition *_integer_definition_new(struct declaration *declaration,
  29                                struct definition_scope *parent_scope,
  30                                GQuark field_name, int index,
  31                                const char *root_name);
  32 static
  33 void _integer_definition_free(struct definition *definition);
  34
  35 static
  36 void _integer_declaration_free(struct declaration *declaration)
  37 {
  38         struct declaration_integer *integer_declaration =
  39                 container_of(declaration, struct declaration_integer, p);
  40         g_free(integer_declaration);
  41 }
  42
  43 struct declaration_integer *
  44         integer_declaration_new(size_t len, int byte_order,
  45                          int signedness, size_t alignment, int base,
  46                          enum ctf_string_encoding encoding,
  47                          struct ctf_clock *clock)
  48 {
  49         struct declaration_integer *integer_declaration;
  50
  51         integer_declaration = g_new(struct declaration_integer, 1);
  52         integer_declaration->p.id = CTF_TYPE_INTEGER;
  53         integer_declaration->p.alignment = alignment;
  54         integer_declaration->p.declaration_free = _integer_declaration_free;
  55         integer_declaration->p.definition_free = _integer_definition_free;
  56         integer_declaration->p.definition_new = _integer_definition_new;
  57         integer_declaration->p.ref = 1;
  58         integer_declaration->len = len;
  59         integer_declaration->byte_order = byte_order;
  60         integer_declaration->signedness = signedness;
  61         integer_declaration->base = base;
  62         integer_declaration->encoding = encoding;
  63         integer_declaration->clock = clock;
  64         return integer_declaration;
  65 }
  66
  67 static
  68 struct definition *
  69         _integer_definition_new(struct declaration *declaration,
  70                                 struct definition_scope *parent_scope,
  71                                 GQuark field_name, int index,
  72                                 const char *root_name)
  73 {
  74         struct declaration_integer *integer_declaration =
  75                 container_of(declaration, struct declaration_integer, p);
  76         struct definition_integer *integer;
  77         int ret;
  78
  79         integer = g_new(struct definition_integer, 1);
  80         declaration_ref(&integer_declaration->p);
  81         integer->p.declaration = declaration;
  82         integer->declaration = integer_declaration;
  83         integer->p.ref = 1;
  84         /*
  85          * Use INT_MAX order to ensure that all fields of the parent
  86          * scope are seen as being prior to this scope.
  87          */
  88         integer->p.index = root_name ? INT_MAX : index;
  89         integer->p.name = field_name;
  90         integer->p.path = new_definition_path(parent_scope, field_name,
  91                                         root_name);
  92         integer->p.scope = NULL;
  93         integer->value._unsigned = 0;
  94         ret = register_field_definition(field_name, &integer->p,
  95                                         parent_scope);
  96         assert(!ret);
  97         return &integer->p;
  98 }
  99
 100 static
 101 void _integer_definition_free(struct definition *definition)
 102 {
 103         struct definition_integer *integer =
 104                 container_of(definition, struct definition_integer, p);
 105
 106         declaration_unref(integer->p.declaration);
 107         g_free(integer);
 108 }
 109
 110 uint64_t get_unsigned_int(const struct definition *field)
 111 {
 112         struct definition_integer *integer_definition;
 113         const struct declaration_integer *integer_declaration;
 114
 115         integer_definition = container_of(field, struct definition_integer, p);
 116         integer_declaration = integer_definition->declaration;
 117
 118         if (!integer_declaration->signedness) {
 119                 return integer_definition->value._unsigned;
 120         }
 121         fprintf(stderr, "[warning] Extracting unsigned value in a signed int\n");
 122         return (uint64_t)integer_definition->value._signed;
 123 }
 124
 125 int64_t get_signed_int(const struct definition *field)
 126 {
 127         struct definition_integer *integer_definition;
 128         const struct declaration_integer *integer_declaration;
 129
 130         integer_definition = container_of(field, struct definition_integer, p);
 131         integer_declaration = integer_definition->declaration;
 132
 133         if (integer_declaration->signedness) {
 134                 return integer_definition->value._signed;
 135         }
 136         fprintf(stderr, "[warning] Extracting signed value in an unsigned int\n");
 137         return (int64_t)integer_definition->value._unsigned;
 138 }