55 lines
1.4 KiB
Text
55 lines
1.4 KiB
Text
#include "config.h"
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#include <stdio.h>
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#include <string.h>
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/**
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* endian - endian conversion macros for simple types
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*
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* Portable protocols (such as on-disk formats, or network protocols)
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* are often defined to be a particular endian: little-endian (least
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* significant bytes first) or big-endian (most significant bytes
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* first).
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*
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* Similarly, some CPUs lay out values in memory in little-endian
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* order (most commonly, Intel's 8086 and derivatives), or big-endian
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* order (almost everyone else).
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*
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* This module provides conversion routines, inspired by the linux kernel.
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* It also provides leint32_t, beint32_t etc typedefs, which are annotated for
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* the sparse checker.
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*
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* Example:
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* #include <stdio.h>
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* #include <err.h>
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* #include <ccan/endian/endian.h>
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*
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* //
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* int main(int argc, char *argv[])
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* {
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* uint32_t value;
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*
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* if (argc != 2)
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* errx(1, "Usage: %s <value>", argv[0]);
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*
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* value = atoi(argv[1]);
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* printf("native: %08x\n", value);
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* printf("little-endian: %08x\n", cpu_to_le32(value));
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* printf("big-endian: %08x\n", cpu_to_be32(value));
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* printf("byte-reversed: %08x\n", bswap_32(value));
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* exit(0);
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* }
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*
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* License: License: CC0 (Public domain)
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* Author: Rusty Russell <rusty@rustcorp.com.au>
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*/
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int main(int argc, char *argv[])
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{
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if (argc != 2)
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return 1;
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if (strcmp(argv[1], "depends") == 0)
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/* Nothing */
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return 0;
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return 1;
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}
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