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July 14, 2016 08:23
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how to stringify an enumeration type in C
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#include <stdio.h> | |
#include <stdio.h> | |
#define ENUM_BODY(name, value) \ | |
name value, | |
#define AS_STRING_CASE(name, value) \ | |
case name: return #name; | |
#define DEFINE_ENUM(name, list) \ | |
typedef enum { \ | |
list(ENUM_BODY) \ | |
}name; | |
#define AS_STRING_DEC(name, list) \ | |
const char* name##AsString(name n); | |
#define AS_STRING_FUNC(name, list) \ | |
const char* name##AsString(name n) { \ | |
switch (n) { \ | |
list(AS_STRING_CASE) \ | |
default: \ | |
{ \ | |
static char int_as_string[8];\ | |
snprintf( int_as_string, sizeof(int_as_string), "%d", n ); \ | |
return int_as_string; \ | |
} \ | |
} \ | |
} | |
#define ENUM_DAYS_OF_THE_WEEK(_) \ | |
_(Monday, = 0) \ | |
_(Tuesday, = 1) \ | |
_(Wednesday, ) \ | |
_(Thursday, = 46) \ | |
_(Friday, ) \ | |
_(Saturday, ) \ | |
_(Sunday, = 99) | |
DEFINE_ENUM(DayOfTheWeek, ENUM_DAYS_OF_THE_WEEK) | |
AS_STRING_DEC(DayOfTheWeek, ENUM_DAYS_OF_THE_WEEK) | |
AS_STRING_FUNC(DayOfTheWeek, ENUM_DAYS_OF_THE_WEEK) | |
int main() | |
{ | |
DayOfTheWeek d = Tuesday; | |
printf("%s\n", DayOfTheWeekAsString(d) ); | |
return 0; | |
} |
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