source: azure_iot_hub_f767zi/trunk/azure_iot_sdk/deps/azure-macro-utils-c/inc/azure_macro_utils/macro_utils.h@ 457

Last change on this file since 457 was 457, checked in by coas-nagasima, 4 years ago

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1// Copyright (c) Microsoft. All rights reserved.
2// Licensed under the MIT license. See LICENSE file in the project root for full license information.
3
4#ifndef MACRO_UTILS_H
5#define MACRO_UTILS_H
6
7#include "azure_macro_utils/macro_utils_generated.h"
8
9#ifdef __cplusplus
10#include <cstring>
11#include <cstddef>
12extern "C" {
13#else
14#include <string.h>
15#include <stddef.h>
16#endif
17
18#if (defined OPTIMIZE_RETURN_CODES)
19 #define MU_FAILURE 1
20#else
21 #define MU_FAILURE __LINE__
22#endif
23
24/*"pointer or NULL" macro - because when printf-ing arguments NULL is not valid for %s (section 7.1.4 of C11 standard) */
25#define MU_P_OR_NULL(p) (((p)!=NULL)?(p):"NULL")
26#define MU_WP_OR_NULL(p) (((p)!=NULL)?(p):L"NULL")
27
28#define MU_TOSTRING_(x) #x
29#define MU_TOSTRING(x) MU_TOSTRING_(x)
30
31#define MU_TRIGGER_PARENTHESIS(...) ,
32
33#define MU_LPAREN (
34
35#define MU_C2_(x,y) x##y
36
37#define MU_C2(x,y) MU_C2_(x,y)
38
39#define MU_C3(x,y,z) MU_C2(x, MU_C2(y,z))
40
41#define MU_C4(x,y,z, u) MU_C2(MU_C2(x,y), MU_C2(z,u))
42
43#define MU_C5(x,y,z,u, v) MU_C2(MU_C4(x,y, z, u), v)
44
45#define MU_C1_(x) x
46
47#define MU_C1(x) MU_C1_(x)
48
49#define MU_C2STRING(x,y) x y
50
51#define MU_C3STRING(x,y,z) x y z
52
53#define MU_C4STRING(x,y,z,u) x y z u
54
55#define MU_C5STRING(x,y,z,u,v) x y z u v
56
57/* we need some sort of macro that does:
58MU_IF(0, "true", "false") => "false"
59MU_IF(1, "true", "false") => "true"
60MU_IF(X, "true", "false") => "true"
61*/
62
63#define MU_INTERNALIF(x) MU_INTERNALIF##x
64#define MU_INTERNALIF0
65
66#define MU_ISZERO(x) MU_COUNT_ARG(MU_INTERNALIF(x))
67
68#define MU_IF(condition, trueBranch, falseBranch) MU_C2(MU_IF,MU_ISZERO(condition))(trueBranch, falseBranch)
69#define MU_IF0(trueBranch, falseBranch) falseBranch
70#define MU_IF1(trueBranch, falseBranch) trueBranch
71
72
73/*the following macro want to eat empty arguments from a list */
74/*examples: */
75/*MU_EAT_EMPTY_ARGS(, , X) expands to X */
76
77#define MU_EXPAND_TO_NOTHING(arg)
78#define MU_EAT_EMPTY_ARG(arg_count, arg) MU_IF(MU_ISEMPTY(arg),,arg) MU_IF(MU_ISEMPTY(arg),MU_EXPAND_TO_NOTHING,MU_IFCOMMALOGIC)(MU_DEC(arg_count))
79#define MU_EAT_EMPTY_ARGS(...) MU_FOR_EACH_1_COUNTED(MU_EAT_EMPTY_ARG, __VA_ARGS__)
80
81#define MU_DEFINE_ENUMERATION_CONSTANT(x) x,
82/*MU_DEFINE_ENUM_WITHOUT_INVALID goes to header*/
83#define MU_DEFINE_ENUM_WITHOUT_INVALID(enumName, ...) typedef enum MU_C2(enumName, _TAG) { MU_FOR_EACH_1(MU_DEFINE_ENUMERATION_CONSTANT, __VA_ARGS__)} enumName; \
84 extern const char* MU_C2(enumName,Strings)(enumName value); \
85 extern int MU_C2(enumName, _FromString)(const char* enumAsString, enumName* destination);
86
87// this macro is a wrapper on top of MU_DEFINE_ENUM_WITHOUT_INVALID, adding an _INVALID value as the first enum value in the enum
88#define MU_DEFINE_ENUM(enumName, ...) \
89 MU_DEFINE_ENUM_WITHOUT_INVALID(enumName, MU_C2(enumName, _INVALID), __VA_ARGS__)
90
91#define MU_DEFINE_ENUMERATION_CONSTANT_AS_WIDESTRING(x) MU_C2(L, MU_TOSTRING(x)) ,
92#define MU_DEFINE_ENUMERATION_CONSTANT_AS_STRING(x) MU_TOSTRING(x) ,
93/*MU_DEFINE_ENUM_STRINGS_WITHOUT_INVALID goes to .c*/
94#define MU_DEFINE_ENUM_STRINGS_WITHOUT_INVALID(enumName, ...) const char* MU_C2(enumName, StringStorage)[MU_COUNT_ARG(__VA_ARGS__)] = {MU_FOR_EACH_1(MU_DEFINE_ENUMERATION_CONSTANT_AS_STRING, __VA_ARGS__)}; \
95const char* MU_C2(enumName,Strings)(enumName value) \
96{ \
97 if((int)value<0 || (int)value>=MU_COUNT_ARG(__VA_ARGS__)) \
98 { \
99 /*this is an error case*/ \
100 return "NULL"; \
101 } \
102 else \
103 { \
104 return MU_C2(enumName, StringStorage)[value]; \
105 } \
106} \
107int MU_C2(enumName, _FromString)(const char* enumAsString, enumName* destination) \
108{ \
109 if( \
110 (enumAsString==NULL) || (destination==NULL) \
111 ) \
112 { \
113 return MU_FAILURE; \
114 } \
115 else \
116 { \
117 size_t i; \
118 for(i=0;i<MU_COUNT_ARG(__VA_ARGS__);i++) \
119 { \
120 if(strcmp(enumAsString, MU_C2(enumName, StringStorage)[i])==0) \
121 { \
122 *destination = (enumName)i; \
123 return 0; \
124 } \
125 } \
126 return MU_FAILURE; \
127 } \
128} \
129
130// this macro is a wrapper on top of MU_DEFINE_ENUM_STRINGS_WITHOUT_INVALID, adding an _INVALID value as the first enum value in the enum
131#define MU_DEFINE_ENUM_STRINGS(enumName, ...) \
132 MU_DEFINE_ENUM_STRINGS_WITHOUT_INVALID(enumName, MU_C2(enumName, _INVALID), __VA_ARGS__)
133
134#define MU_DEFINE_LOCAL_ENUM_WITHOUT_INVALID(enumName, ...) typedef enum MU_C2(enumName, _TAG) { MU_FOR_EACH_1(MU_DEFINE_ENUMERATION_CONSTANT, __VA_ARGS__)} enumName; \
135static const char* MU_C2(enumName, StringStorage)[MU_COUNT_ARG(__VA_ARGS__)] = {MU_FOR_EACH_1(MU_DEFINE_ENUMERATION_CONSTANT_AS_STRING, __VA_ARGS__)}; \
136static const char* MU_C2(enumName,Strings)(enumName value) \
137{ \
138 if((int)value<0 || (int)value>=MU_COUNT_ARG(__VA_ARGS__)) \
139 { \
140 /*this is an error case*/ \
141 return "NULL"; \
142 } \
143 else \
144 { \
145 return MU_C2(enumName, StringStorage)[value]; \
146 } \
147}
148
149// this macro is a wrapper on top of MU_DEFINE_LOCAL_ENUM_WITHOUT_INVALID, adding an _INVALID value as the first enum value in the enum
150#define MU_DEFINE_LOCAL_ENUM(enumName, ...) \
151 MU_DEFINE_LOCAL_ENUM_WITHOUT_INVALID(enumName, MU_C2(enumName, _INVALID), __VA_ARGS__)
152
153// this macro returns the number of enum values (taking into account that an invalid value is generated)
154#define MU_ENUM_VALUE_COUNT(...) (MU_COUNT_ARG(__VA_ARGS__) + 1)
155
156// this macro returns the number of enum 2 values (taking into account that an invalid value is generated)
157#define MU_ENUM_2_VALUE_COUNT(...) ((MU_COUNT_ARG(__VA_ARGS__) / 2) + 1)
158
159#define MU_ENUM_TO_STRING(enumName, enumValue) MU_C2(enumName, Strings)(enumValue)
160#define MU_STRING_TO_ENUM(stringValue, enumName, addressOfEnumVariable) MU_C2(enumName, _FromString)(stringValue, addressOfEnumVariable)
161
162#define MU_EMPTY()
163#define MACRO_UTILS_DELAY(id) id MU_EMPTY MU_LPAREN )
164
165#define MU_DEFINE_ENUMERATION_CONSTANT_2(enumerationConstant, constantExpression) enumerationConstant = constantExpression,
166
167#define MU_DECLARE_ENUM_STRINGS_2(enumIdentifier, ...) extern const char* MU_C3(MU_, enumIdentifier,_ToString)(enumIdentifier enumerationConstant);
168
169#define MU_DEFINE_ENUM_2_WITHOUT_INVALID(enumIdentifier, ... ) typedef enum MU_C2(enumIdentifier, _TAG) {MU_FOR_EACH_2(MU_DEFINE_ENUMERATION_CONSTANT_2, __VA_ARGS__)} enumIdentifier; \
170 MU_DECLARE_ENUM_STRINGS_2(enumIdentifier, __VA_ARGS__)
171
172// this macro is a wrapper on top of MU_DEFINE_ENUM, adding an _INVALID value as the first enum value in the enum
173#define MU_DEFINE_ENUM_2(enumName, ...) \
174 MU_DEFINE_ENUM_2_WITHOUT_INVALID(enumName, MU_C2(enumName, _INVALID), (int)0xDDDDDDDD, __VA_ARGS__)
175
176typedef struct ENUM_VALUE_AND_STRING_TAG
177{
178 int value;
179 const char* valueAsString;
180}ENUM_VALUE_AND_STRING;
181
182#define MU_DEFINE_ENUM_VALUE_AND_STRING(enumerationConstant, constantExpression) {enumerationConstant, MU_TOSTRING(enumerationConstant)},
183#define MU_DEFINE_ENUM_STRINGS_2(enumIdentifier, ... ) static const ENUM_VALUE_AND_STRING MU_C2(enumIdentifier, _ValuesAndStrings)[MU_DIV2(MU_COUNT_ARG(__VA_ARGS__))] ={MU_FOR_EACH_2(MU_DEFINE_ENUM_VALUE_AND_STRING, __VA_ARGS__)}; \
184const char* MU_C3(MU_, enumIdentifier,_ToString)(enumIdentifier value) \
185{ \
186 for(size_t i=0;i<sizeof(MU_C2(enumIdentifier, _ValuesAndStrings))/sizeof(MU_C2(enumIdentifier, _ValuesAndStrings)[0]);i++) \
187 { \
188 if(MU_C2(enumIdentifier, _ValuesAndStrings)[i].value == (int)value) \
189 { \
190 return MU_C2(enumIdentifier, _ValuesAndStrings)[i].valueAsString; \
191 } \
192 } \
193 return "NULL"; \
194} \
195
196#define MU_ENUM_TO_STRING_2(enumIdentifier, value) MU_C3(MU_, enumIdentifier,_ToString)(value)
197
198/*PRI_MU_ENUM and MU_ENUM_VALUE/MU_ENUM_VALUE_2 work together as printf format specifier/argument. e.g: printf("enumValue was=%" PRI_MU_ENUM "\n", MU_ENUM_TO_STRING(enumIdentifier, enumValue));*/
199#define PRI_MU_ENUM "s%s (%d)"
200
201#define MU_ENUM_VALUE(enumIdentifier, value) "", MU_ENUM_TO_STRING(enumIdentifier, (value)), (int)(value)
202
203#define MU_ENUM_VALUE_2(enumIdentifier, value) "", MU_ENUM_TO_STRING_2(enumIdentifier, (value)), (int)(value)
204
205#define MU_DEFINE_STRUCT_FIELD(fieldType, fieldName) fieldType fieldName;
206
207/*MU_DEFINE_STRUCT allows creating a struct typedef based on a list of fields*/
208#define MU_DEFINE_STRUCT(structName, ...) typedef struct MU_C2(structName, _TAG) { MU_FOR_EACH_2(MU_DEFINE_STRUCT_FIELD, __VA_ARGS__)} structName;
209
210// this macro allows counting of elements in an array
211#define MU_COUNT_ARRAY_ITEMS(A) (sizeof(A)/sizeof((A)[0]))
212
213#ifdef __cplusplus
214}
215#endif
216
217#endif /*MACRO_UTILS_H*/
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