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short_types
shorter names for standard integer types
Rusty Russell <rusty@rustcorp.com.au>
"C is a Spartan language, and so should your naming be."
-- Linus Torvalds
The short_types header provides for convenient abbreviations for the posixly-damned uint32_t types. If ccan/endian/endian.h is included, it also provides be32/le32 for explicitly annotating types of specific endian.
Include this header, if only to stop people using these identifiers for other things!
#include <stdint.h>
#include <string.h>
#include <stdio.h>
#include <ccan/short_types/short_types.h>
// Print nonsensical numerical comparison of POSIX vs. short_types.
#define stringify_1(x) #x
#define stringify(x) stringify_1(x)
static void evaluate(size_t size, const char *posix, const char *sht,
unsigned int *posix_total, unsigned int *sht_total,
unsigned int *size_total)
{
printf("\t%ssigned %s: POSIX %zu%%, short %zu%%\n",
sht[0] == 'u' ? "un" : "",
sht+1,
strlen(posix)*100 / size,
strlen(sht)*100 / size);
*posix_total += strlen(posix);
*sht_total += strlen(sht);
*size_total += size;
}
#define EVALUATE(psx, short, pt, st, t) \
evaluate(sizeof(psx), stringify(psx), stringify(sht), pt, st, t)
int main(void)
{
unsigned int posix_total = 0, sht_total = 0, size_total = 0;
printf("Comparing size of type vs size of name:\n");
EVALUATE(uint8_t, u8, &posix_total, &sht_total, &size_total);
EVALUATE(int8_t, s8, &posix_total, &sht_total, &size_total);
EVALUATE(uint16_t, u16, &posix_total, &sht_total, &size_total);
EVALUATE(int16_t, s16, &posix_total, &sht_total, &size_total);
EVALUATE(uint32_t, u32, &posix_total, &sht_total, &size_total);
EVALUATE(int32_t, s32, &posix_total, &sht_total, &size_total);
EVALUATE(uint64_t, u64, &posix_total, &sht_total, &size_total);
EVALUATE(int64_t, s64, &posix_total, &sht_total, &size_total);
printf("Conclusion:\n"
"\tPOSIX is %u%% LESS efficient than binary.\n"
"\tshort_types.h is %u%% MORE efficient than binary.\n",
(posix_total - size_total) * 100 / size_total,
(size_total - sht_total) * 100 / size_total);
return 0;
}
CC0 (Public domain)