diff options
Diffstat (limited to 'lib/ccan')
| -rw-r--r-- | lib/ccan/endian/.depends | 0 | ||||
| -rw-r--r-- | lib/ccan/endian/LICENSE | 28 | ||||
| -rw-r--r-- | lib/ccan/endian/_info | 55 | ||||
| -rw-r--r-- | lib/ccan/endian/endian.h | 346 | ||||
| -rw-r--r-- | lib/ccan/endian/test/compile_ok-constant.c | 12 | ||||
| -rw-r--r-- | lib/ccan/endian/test/run.c | 109 |
6 files changed, 550 insertions, 0 deletions
diff --git a/lib/ccan/endian/.depends b/lib/ccan/endian/.depends new file mode 100644 index 0000000..e69de29 --- /dev/null +++ b/lib/ccan/endian/.depends diff --git a/lib/ccan/endian/LICENSE b/lib/ccan/endian/LICENSE new file mode 100644 index 0000000..feb9b11 --- /dev/null +++ b/lib/ccan/endian/LICENSE @@ -0,0 +1,28 @@ +Statement of Purpose + +The laws of most jurisdictions throughout the world automatically confer exclusive Copyright and Related Rights (defined below) upon the creator and subsequent owner(s) (each and all, an "owner") of an original work of authorship and/or a database (each, a "Work"). + +Certain owners wish to permanently relinquish those rights to a Work for the purpose of contributing to a commons of creative, cultural and scientific works ("Commons") that the public can reliably and without fear of later claims of infringement build upon, modify, incorporate in other works, reuse and redistribute as freely as possible in any form whatsoever and for any purposes, including without limitation commercial purposes. These owners may contribute to the Commons to promote the ideal of a free culture and the further production of creative, cultural and scientific works, or to gain reputation or greater distribution for their Work in part through the use and efforts of others. + +For these and/or other purposes and motivations, and without any expectation of additional consideration or compensation, the person associating CC0 with a Work (the "Affirmer"), to the extent that he or she is an owner of Copyright and Related Rights in the Work, voluntarily elects to apply CC0 to the Work and publicly distribute the Work under its terms, with knowledge of his or her Copyright and Related Rights in the Work and the meaning and intended legal effect of CC0 on those rights. + +1. Copyright and Related Rights. A Work made available under CC0 may be protected by copyright and related or neighboring rights ("Copyright and Related Rights"). 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To the greatest extent permitted by, but not in contravention of, applicable law, Affirmer hereby overtly, fully, permanently, irrevocably and unconditionally waives, abandons, and surrenders all of Affirmer's Copyright and Related Rights and associated claims and causes of action, whether now known or unknown (including existing as well as future claims and causes of action), in the Work (i) in all territories worldwide, (ii) for the maximum duration provided by applicable law or treaty (including future time extensions), (iii) in any current or future medium and for any number of copies, and (iv) for any purpose whatsoever, including without limitation commercial, advertising or promotional purposes (the "Waiver"). 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In addition, to the extent the Waiver is so judged Affirmer hereby grants to each affected person a royalty-free, non transferable, non sublicensable, non exclusive, irrevocable and unconditional license to exercise Affirmer's Copyright and Related Rights in the Work (i) in all territories worldwide, (ii) for the maximum duration provided by applicable law or treaty (including future time extensions), (iii) in any current or future medium and for any number of copies, and (iv) for any purpose whatsoever, including without limitation commercial, advertising or promotional purposes (the "License"). The License shall be deemed effective as of the date CC0 was applied by Affirmer to the Work. Should any part of the License for any reason be judged legally invalid or ineffective under applicable law, such partial invalidity or ineffectiveness shall not invalidate the remainder of the License, and in such case Affirmer hereby affirms that he or she will not (i) exercise any of his or her remaining Copyright and Related Rights in the Work or (ii) assert any associated claims and causes of action with respect to the Work, in either case contrary to Affirmer's express Statement of Purpose. + +4. Limitations and Disclaimers. + + No trademark or patent rights held by Affirmer are waived, abandoned, surrendered, licensed or otherwise affected by this document. + Affirmer offers the Work as-is and makes no representations or warranties of any kind concerning the Work, express, implied, statutory or otherwise, including without limitation warranties of title, merchantability, fitness for a particular purpose, non infringement, or the absence of latent or other defects, accuracy, or the present or absence of errors, whether or not discoverable, all to the greatest extent permissible under applicable law. + Affirmer disclaims responsibility for clearing rights of other persons that may apply to the Work or any use thereof, including without limitation any person's Copyright and Related Rights in the Work. Further, Affirmer disclaims responsibility for obtaining any necessary consents, permissions or other rights required for any use of the Work. + Affirmer understands and acknowledges that Creative Commons is not a party to this document and has no duty or obligation with respect to this CC0 or use of the Work. diff --git a/lib/ccan/endian/_info b/lib/ccan/endian/_info new file mode 100644 index 0000000..efe5a8b --- /dev/null +++ b/lib/ccan/endian/_info @@ -0,0 +1,55 @@ +#include "config.h" +#include <stdio.h> +#include <string.h> + +/** + * endian - endian conversion macros for simple types + * + * Portable protocols (such as on-disk formats, or network protocols) + * are often defined to be a particular endian: little-endian (least + * significant bytes first) or big-endian (most significant bytes + * first). + * + * Similarly, some CPUs lay out values in memory in little-endian + * order (most commonly, Intel's 8086 and derivatives), or big-endian + * order (almost everyone else). + * + * This module provides conversion routines, inspired by the linux kernel. + * It also provides leint32_t, beint32_t etc typedefs, which are annotated for + * the sparse checker. + * + * Example: + * #include <stdio.h> + * #include <err.h> + * #include <ccan/endian/endian.h> + * + * // + * int main(int argc, char *argv[]) + * { + * uint32_t value; + * + * if (argc != 2) + * errx(1, "Usage: %s <value>", argv[0]); + * + * value = atoi(argv[1]); + * printf("native: %08x\n", value); + * printf("little-endian: %08x\n", cpu_to_le32(value)); + * printf("big-endian: %08x\n", cpu_to_be32(value)); + * printf("byte-reversed: %08x\n", bswap_32(value)); + * exit(0); + * } + * + * License: License: CC0 (Public domain) + * Author: Rusty Russell <rusty@rustcorp.com.au> + */ +int main(int argc, char *argv[]) +{ + if (argc != 2) + return 1; + + if (strcmp(argv[1], "depends") == 0) + /* Nothing */ + return 0; + + return 1; +} diff --git a/lib/ccan/endian/endian.h b/lib/ccan/endian/endian.h new file mode 100644 index 0000000..0c99cc8 --- /dev/null +++ b/lib/ccan/endian/endian.h @@ -0,0 +1,346 @@ +/* CC0 (Public domain) - see LICENSE file for details */ +#ifndef CCAN_ENDIAN_H +#define CCAN_ENDIAN_H +#include <stdint.h> +#include "config.h" + +/** + * BSWAP_16 - reverse bytes in a constant uint16_t value. + * @val: constant value whose bytes to swap. + * + * Designed to be usable in constant-requiring initializers. + * + * Example: + * struct mystruct { + * char buf[BSWAP_16(0x1234)]; + * }; + */ +#define BSWAP_16(val) \ + ((((uint16_t)(val) & 0x00ff) << 8) \ + | (((uint16_t)(val) & 0xff00) >> 8)) + +/** + * BSWAP_32 - reverse bytes in a constant uint32_t value. + * @val: constant value whose bytes to swap. + * + * Designed to be usable in constant-requiring initializers. + * + * Example: + * struct mystruct { + * char buf[BSWAP_32(0xff000000)]; + * }; + */ +#define BSWAP_32(val) \ + ((((uint32_t)(val) & 0x000000ff) << 24) \ + | (((uint32_t)(val) & 0x0000ff00) << 8) \ + | (((uint32_t)(val) & 0x00ff0000) >> 8) \ + | (((uint32_t)(val) & 0xff000000) >> 24)) + +/** + * BSWAP_64 - reverse bytes in a constant uint64_t value. + * @val: constantvalue whose bytes to swap. + * + * Designed to be usable in constant-requiring initializers. + * + * Example: + * struct mystruct { + * char buf[BSWAP_64(0xff00000000000000ULL)]; + * }; + */ +#define BSWAP_64(val) \ + ((((uint64_t)(val) & 0x00000000000000ffULL) << 56) \ + | (((uint64_t)(val) & 0x000000000000ff00ULL) << 40) \ + | (((uint64_t)(val) & 0x0000000000ff0000ULL) << 24) \ + | (((uint64_t)(val) & 0x00000000ff000000ULL) << 8) \ + | (((uint64_t)(val) & 0x000000ff00000000ULL) >> 8) \ + | (((uint64_t)(val) & 0x0000ff0000000000ULL) >> 24) \ + | (((uint64_t)(val) & 0x00ff000000000000ULL) >> 40) \ + | (((uint64_t)(val) & 0xff00000000000000ULL) >> 56)) + +#if HAVE_BYTESWAP_H +#include <byteswap.h> +#else +/** + * bswap_16 - reverse bytes in a uint16_t value. + * @val: value whose bytes to swap. + * + * Example: + * // Output contains "1024 is 4 as two bytes reversed" + * printf("1024 is %u as two bytes reversed\n", bswap_16(1024)); + */ +static inline uint16_t bswap_16(uint16_t val) +{ + return BSWAP_16(val); +} + +/** + * bswap_32 - reverse bytes in a uint32_t value. + * @val: value whose bytes to swap. + * + * Example: + * // Output contains "1024 is 262144 as four bytes reversed" + * printf("1024 is %u as four bytes reversed\n", bswap_32(1024)); + */ +static inline uint32_t bswap_32(uint32_t val) +{ + return BSWAP_32(val); +} +#endif /* !HAVE_BYTESWAP_H */ + +#if !HAVE_BSWAP_64 +/** + * bswap_64 - reverse bytes in a uint64_t value. + * @val: value whose bytes to swap. + * + * Example: + * // Output contains "1024 is 1125899906842624 as eight bytes reversed" + * printf("1024 is %llu as eight bytes reversed\n", + * (unsigned long long)bswap_64(1024)); + */ +static inline uint64_t bswap_64(uint64_t val) +{ + return BSWAP_64(val); +} +#endif + +/* Sanity check the defines. We don't handle weird endianness. */ +#if !HAVE_LITTLE_ENDIAN && !HAVE_BIG_ENDIAN +#error "Unknown endian" +#elif HAVE_LITTLE_ENDIAN && HAVE_BIG_ENDIAN +#error "Can't compile for both big and little endian." +#endif + +#ifdef __CHECKER__ +/* sparse needs forcing to remove bitwise attribute from ccan/short_types */ +#define ENDIAN_CAST __attribute__((force)) +#define ENDIAN_TYPE __attribute__((bitwise)) +#else +#define ENDIAN_CAST +#define ENDIAN_TYPE +#endif + +typedef uint64_t ENDIAN_TYPE leint64_t; +typedef uint64_t ENDIAN_TYPE beint64_t; +typedef uint32_t ENDIAN_TYPE leint32_t; +typedef uint32_t ENDIAN_TYPE beint32_t; +typedef uint16_t ENDIAN_TYPE leint16_t; +typedef uint16_t ENDIAN_TYPE beint16_t; + +#if HAVE_LITTLE_ENDIAN +/** + * CPU_TO_LE64 - convert a constant uint64_t value to little-endian + * @native: constant to convert + */ +#define CPU_TO_LE64(native) ((ENDIAN_CAST leint64_t)(native)) + +/** + * CPU_TO_LE32 - convert a constant uint32_t value to little-endian + * @native: constant to convert + */ +#define CPU_TO_LE32(native) ((ENDIAN_CAST leint32_t)(native)) + +/** + * CPU_TO_LE16 - convert a constant uint16_t value to little-endian + * @native: constant to convert + */ +#define CPU_TO_LE16(native) ((ENDIAN_CAST leint16_t)(native)) + +/** + * LE64_TO_CPU - convert a little-endian uint64_t constant + * @le_val: little-endian constant to convert + */ +#define LE64_TO_CPU(le_val) ((ENDIAN_CAST uint64_t)(le_val)) + +/** + * LE32_TO_CPU - convert a little-endian uint32_t constant + * @le_val: little-endian constant to convert + */ +#define LE32_TO_CPU(le_val) ((ENDIAN_CAST uint32_t)(le_val)) + +/** + * LE16_TO_CPU - convert a little-endian uint16_t constant + * @le_val: little-endian constant to convert + */ +#define LE16_TO_CPU(le_val) ((ENDIAN_CAST uint16_t)(le_val)) + +#else /* ... HAVE_BIG_ENDIAN */ +#define CPU_TO_LE64(native) ((ENDIAN_CAST leint64_t)BSWAP_64(native)) +#define CPU_TO_LE32(native) ((ENDIAN_CAST leint32_t)BSWAP_32(native)) +#define CPU_TO_LE16(native) ((ENDIAN_CAST leint16_t)BSWAP_16(native)) +#define LE64_TO_CPU(le_val) BSWAP_64((ENDIAN_CAST uint64_t)le_val) +#define LE32_TO_CPU(le_val) BSWAP_32((ENDIAN_CAST uint32_t)le_val) +#define LE16_TO_CPU(le_val) BSWAP_16((ENDIAN_CAST uint16_t)le_val) +#endif /* HAVE_BIG_ENDIAN */ + +#if HAVE_BIG_ENDIAN +/** + * CPU_TO_BE64 - convert a constant uint64_t value to big-endian + * @native: constant to convert + */ +#define CPU_TO_BE64(native) ((ENDIAN_CAST beint64_t)(native)) + +/** + * CPU_TO_BE32 - convert a constant uint32_t value to big-endian + * @native: constant to convert + */ +#define CPU_TO_BE32(native) ((ENDIAN_CAST beint32_t)(native)) + +/** + * CPU_TO_BE16 - convert a constant uint16_t value to big-endian + * @native: constant to convert + */ +#define CPU_TO_BE16(native) ((ENDIAN_CAST beint16_t)(native)) + +/** + * BE64_TO_CPU - convert a big-endian uint64_t constant + * @le_val: big-endian constant to convert + */ +#define BE64_TO_CPU(le_val) ((ENDIAN_CAST uint64_t)(le_val)) + +/** + * BE32_TO_CPU - convert a big-endian uint32_t constant + * @le_val: big-endian constant to convert + */ +#define BE32_TO_CPU(le_val) ((ENDIAN_CAST uint32_t)(le_val)) + +/** + * BE16_TO_CPU - convert a big-endian uint16_t constant + * @le_val: big-endian constant to convert + */ +#define BE16_TO_CPU(le_val) ((ENDIAN_CAST uint16_t)(le_val)) + +#else /* ... HAVE_LITTLE_ENDIAN */ +#define CPU_TO_BE64(native) ((ENDIAN_CAST beint64_t)BSWAP_64(native)) +#define CPU_TO_BE32(native) ((ENDIAN_CAST beint32_t)BSWAP_32(native)) +#define CPU_TO_BE16(native) ((ENDIAN_CAST beint16_t)BSWAP_16(native)) +#define BE64_TO_CPU(le_val) BSWAP_64((ENDIAN_CAST uint64_t)le_val) +#define BE32_TO_CPU(le_val) BSWAP_32((ENDIAN_CAST uint32_t)le_val) +#define BE16_TO_CPU(le_val) BSWAP_16((ENDIAN_CAST uint16_t)le_val) +#endif /* HAVE_LITTE_ENDIAN */ + + +/** + * cpu_to_le64 - convert a uint64_t value to little-endian + * @native: value to convert + */ +static inline leint64_t cpu_to_le64(uint64_t native) +{ + return CPU_TO_LE64(native); +} + +/** + * cpu_to_le32 - convert a uint32_t value to little-endian + * @native: value to convert + */ +static inline leint32_t cpu_to_le32(uint32_t native) +{ + return CPU_TO_LE32(native); +} + +/** + * cpu_to_le16 - convert a uint16_t value to little-endian + * @native: value to convert + */ +static inline leint16_t cpu_to_le16(uint16_t native) +{ + return CPU_TO_LE16(native); +} + +/** + * le64_to_cpu - convert a little-endian uint64_t value + * @le_val: little-endian value to convert + */ +static inline uint64_t le64_to_cpu(leint64_t le_val) +{ + return LE64_TO_CPU(le_val); +} + +/** + * le32_to_cpu - convert a little-endian uint32_t value + * @le_val: little-endian value to convert + */ +static inline uint32_t le32_to_cpu(leint32_t le_val) +{ + return LE32_TO_CPU(le_val); +} + +/** + * le16_to_cpu - convert a little-endian uint16_t value + * @le_val: little-endian value to convert + */ +static inline uint16_t le16_to_cpu(leint16_t le_val) +{ + return LE16_TO_CPU(le_val); +} + +/** + * cpu_to_be64 - convert a uint64_t value to big endian. + * @native: value to convert + */ +static inline beint64_t cpu_to_be64(uint64_t native) +{ + return CPU_TO_BE64(native); +} + +/** + * cpu_to_be32 - convert a uint32_t value to big endian. + * @native: value to convert + */ +static inline beint32_t cpu_to_be32(uint32_t native) +{ + return CPU_TO_BE32(native); +} + +/** + * cpu_to_be16 - convert a uint16_t value to big endian. + * @native: value to convert + */ +static inline beint16_t cpu_to_be16(uint16_t native) +{ + return CPU_TO_BE16(native); +} + +/** + * be64_to_cpu - convert a big-endian uint64_t value + * @be_val: big-endian value to convert + */ +static inline uint64_t be64_to_cpu(beint64_t be_val) +{ + return BE64_TO_CPU(be_val); +} + +/** + * be32_to_cpu - convert a big-endian uint32_t value + * @be_val: big-endian value to convert + */ +static inline uint32_t be32_to_cpu(beint32_t be_val) +{ + return BE32_TO_CPU(be_val); +} + +/** + * be16_to_cpu - convert a big-endian uint16_t value + * @be_val: big-endian value to convert + */ +static inline uint16_t be16_to_cpu(beint16_t be_val) +{ + return BE16_TO_CPU(be_val); +} + +/* Whichever they include first, they get these definitions. */ +#ifdef CCAN_SHORT_TYPES_H +/** + * be64/be32/be16 - 64/32/16 bit big-endian representation. + */ +typedef beint64_t be64; +typedef beint32_t be32; +typedef beint16_t be16; + +/** + * le64/le32/le16 - 64/32/16 bit little-endian representation. + */ +typedef leint64_t le64; +typedef leint32_t le32; +typedef leint16_t le16; +#endif +#endif /* CCAN_ENDIAN_H */ diff --git a/lib/ccan/endian/test/compile_ok-constant.c b/lib/ccan/endian/test/compile_ok-constant.c new file mode 100644 index 0000000..1aef1dd --- /dev/null +++ b/lib/ccan/endian/test/compile_ok-constant.c @@ -0,0 +1,12 @@ +#include <ccan/endian/endian.h> + +struct foo { + char one[BSWAP_16(0xFF00)]; + char two[BSWAP_32(0xFF000000)]; + char three[BSWAP_64(0xFF00000000000000ULL)]; +}; + +int main(void) +{ + return 0; +} diff --git a/lib/ccan/endian/test/run.c b/lib/ccan/endian/test/run.c new file mode 100644 index 0000000..e5b054b --- /dev/null +++ b/lib/ccan/endian/test/run.c @@ -0,0 +1,109 @@ +#include <ccan/endian/endian.h> +#include <stdlib.h> +#include <stddef.h> +#include <ccan/tap/tap.h> + +int main(int argc, char *argv[]) +{ + union { + uint64_t u64; + unsigned char u64_bytes[8]; + } u64; + union { + uint32_t u32; + unsigned char u32_bytes[4]; + } u32; + union { + uint16_t u16; + unsigned char u16_bytes[2]; + } u16; + + (void)argc; + (void)argv; + + plan_tests(48); + + /* Straight swap tests. */ + u64.u64_bytes[0] = 0x00; + u64.u64_bytes[1] = 0x11; + u64.u64_bytes[2] = 0x22; + u64.u64_bytes[3] = 0x33; + u64.u64_bytes[4] = 0x44; + u64.u64_bytes[5] = 0x55; + u64.u64_bytes[6] = 0x66; + u64.u64_bytes[7] = 0x77; + u64.u64 = bswap_64(u64.u64); + ok1(u64.u64_bytes[7] == 0x00); + ok1(u64.u64_bytes[6] == 0x11); + ok1(u64.u64_bytes[5] == 0x22); + ok1(u64.u64_bytes[4] == 0x33); + ok1(u64.u64_bytes[3] == 0x44); + ok1(u64.u64_bytes[2] == 0x55); + ok1(u64.u64_bytes[1] == 0x66); + ok1(u64.u64_bytes[0] == 0x77); + + u32.u32_bytes[0] = 0x00; + u32.u32_bytes[1] = 0x11; + u32.u32_bytes[2] = 0x22; + u32.u32_bytes[3] = 0x33; + u32.u32 = bswap_32(u32.u32); + ok1(u32.u32_bytes[3] == 0x00); + ok1(u32.u32_bytes[2] == 0x11); + ok1(u32.u32_bytes[1] == 0x22); + ok1(u32.u32_bytes[0] == 0x33); + + u16.u16_bytes[0] = 0x00; + u16.u16_bytes[1] = 0x11; + u16.u16 = bswap_16(u16.u16); + ok1(u16.u16_bytes[1] == 0x00); + ok1(u16.u16_bytes[0] == 0x11); + + /* Endian tests. */ + u64.u64 = cpu_to_le64(0x0011223344556677ULL); + ok1(u64.u64_bytes[0] == 0x77); + ok1(u64.u64_bytes[1] == 0x66); + ok1(u64.u64_bytes[2] == 0x55); + ok1(u64.u64_bytes[3] == 0x44); + ok1(u64.u64_bytes[4] == 0x33); + ok1(u64.u64_bytes[5] == 0x22); + ok1(u64.u64_bytes[6] == 0x11); + ok1(u64.u64_bytes[7] == 0x00); + ok1(le64_to_cpu(u64.u64) == 0x0011223344556677ULL); + + u64.u64 = cpu_to_be64(0x0011223344556677ULL); + ok1(u64.u64_bytes[7] == 0x77); + ok1(u64.u64_bytes[6] == 0x66); + ok1(u64.u64_bytes[5] == 0x55); + ok1(u64.u64_bytes[4] == 0x44); + ok1(u64.u64_bytes[3] == 0x33); + ok1(u64.u64_bytes[2] == 0x22); + ok1(u64.u64_bytes[1] == 0x11); + ok1(u64.u64_bytes[0] == 0x00); + ok1(be64_to_cpu(u64.u64) == 0x0011223344556677ULL); + + u32.u32 = cpu_to_le32(0x00112233); + ok1(u32.u32_bytes[0] == 0x33); + ok1(u32.u32_bytes[1] == 0x22); + ok1(u32.u32_bytes[2] == 0x11); + ok1(u32.u32_bytes[3] == 0x00); + ok1(le32_to_cpu(u32.u32) == 0x00112233); + + u32.u32 = cpu_to_be32(0x00112233); + ok1(u32.u32_bytes[3] == 0x33); + ok1(u32.u32_bytes[2] == 0x22); + ok1(u32.u32_bytes[1] == 0x11); + ok1(u32.u32_bytes[0] == 0x00); + ok1(be32_to_cpu(u32.u32) == 0x00112233); + + u16.u16 = cpu_to_le16(0x0011); + ok1(u16.u16_bytes[0] == 0x11); + ok1(u16.u16_bytes[1] == 0x00); + ok1(le16_to_cpu(u16.u16) == 0x0011); + + u16.u16 = cpu_to_be16(0x0011); + ok1(u16.u16_bytes[1] == 0x11); + ok1(u16.u16_bytes[0] == 0x00); + ok1(be16_to_cpu(u16.u16) == 0x0011); + + exit(exit_status()); +} |
