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Thu, 11 Nov 2021 13:48:54 +0300 To: kyukhin@tarantool.org Cc: tarantool-patches@dev.tarantool.org Date: Thu, 11 Nov 2021 13:48:54 +0300 Message-Id: X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit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eAau8CL7WIMRKs4sN3D3tLDjz0dLbV79QFUyzQ2Ujvy7cMT6pYYqY16iZVKkSc3dCLJ7zSJH7+u4VD18S7Vl4ZUrpaVfd2+vE6kuoey4m4VkSEu530nj6fImhcD4MUrOEAnl0W826KZ9Q+tr5ycPtXkTV4k65bRjmOUUP8cvGozZ33TWg5HZplvhhXbhDGzqmQDTd6OAevLeAnq3Ra9uf7zvY2zzsIhlcp/Y7m53TZgf2aB4JOg4gkr2bioj4t8MBgWr8bJ4tAyNx9MzmA== X-Mailru-Sender: 689FA8AB762F7393C37E3C1AEC41BA5D5F681737F246AE2E475CF0D568ACC41C83D72C36FC87018B9F80AB2734326CD2FB559BB5D741EB96352A0ABBE4FDA4210A04DAD6CC59E33667EA787935ED9F1B X-Mras: Ok Subject: [Tarantool-patches] [PATCH v1 03/21] sql: refactor HEX() function X-BeenThere: tarantool-patches@dev.tarantool.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Tarantool development patches List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Mergen Imeev via Tarantool-patches Reply-To: imeevma@tarantool.org Errors-To: tarantool-patches-bounces@dev.tarantool.org Sender: "Tarantool-patches" Part of #4145 --- src/box/sql/func.c | 74 ++++++++++++++++++++++++---------------------- 1 file changed, 38 insertions(+), 36 deletions(-) diff --git a/src/box/sql/func.c b/src/box/sql/func.c index 40bdbf739..e4372de86 100644 --- a/src/box/sql/func.c +++ b/src/box/sql/func.c @@ -810,6 +810,43 @@ func_greatest_least(struct sql_context *ctx, int argc, struct Mem *argv) ctx->is_aborted = true; } +/** + * Implementation of the HEX() function. + * + * The HEX() function returns the hexadecimal representation of the argument. + */ +static const char hexdigits[] = { + '0', '1', '2', '3', '4', '5', '6', '7', + '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' +}; + +static void +func_hex(struct sql_context *ctx, int argc, struct Mem *argv) +{ + assert(argc == 1); + (void)argc; + struct Mem *arg = &argv[0]; + if (mem_is_null(arg)) + return; + + assert(mem_is_bin(arg) && arg->n >= 0); + if (arg->n == 0) + return mem_set_str0_static(ctx->pOut, ""); + + uint32_t size = 2 * arg->n; + char *str = sqlDbMallocRawNN(sql_get(), size); + if (str == NULL) { + ctx->is_aborted = true; + return; + } + for (int i = 0; i < arg->n; ++i) { + char c = arg->z[i]; + str[2 * i] = hexdigits[(c >> 4) & 0xf]; + str[2 * i + 1] = hexdigits[c & 0xf]; + } + mem_set_str_allocated(ctx->pOut, str, size); +} + static const unsigned char * mem_as_ustr(struct Mem *mem) { @@ -1395,14 +1432,6 @@ sql_func_version(struct sql_context *context, int argc, struct Mem *argv) sql_result_text(context, tarantool_version(), -1, SQL_STATIC); } -/* Array for converting from half-bytes (nybbles) into ASCII hex - * digits. - */ -static const char hexdigits[] = { - '0', '1', '2', '3', '4', '5', '6', '7', - '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' -}; - /* * Implementation of the QUOTE() function. This function takes a single * argument. If the argument is numeric, the return value is the same as @@ -1512,33 +1541,6 @@ unicodeFunc(struct sql_context *context, int argc, struct Mem *argv) sql_result_uint(context, sqlUtf8Read(&z)); } -/* - * The hex() function. Interpret the argument as a blob. Return - * a hexadecimal rendering as text. - */ -static void -hexFunc(struct sql_context *context, int argc, struct Mem *argv) -{ - int i, n; - const unsigned char *pBlob; - char *zHex, *z; - assert(argc == 1); - UNUSED_PARAMETER(argc); - pBlob = mem_as_bin(&argv[0]); - n = mem_len_unsafe(&argv[0]); - assert(pBlob == mem_as_bin(&argv[0])); /* No encoding change */ - z = zHex = contextMalloc(context, ((i64) n) * 2 + 1); - if (zHex) { - for (i = 0; i < n; i++, pBlob++) { - unsigned char c = *pBlob; - *(z++) = hexdigits[(c >> 4) & 0xf]; - *(z++) = hexdigits[c & 0xf]; - } - *z = 0; - sql_result_text(context, zHex, n * 2, sql_free); - } -} - /* * The zeroblob(N) function returns a zero-filled blob of size N bytes. */ @@ -1895,7 +1897,7 @@ static struct sql_func_definition definitions[] = { {"GROUP_CONCAT", 2, {FIELD_TYPE_VARBINARY, FIELD_TYPE_VARBINARY}, FIELD_TYPE_VARBINARY, step_group_concat, NULL}, - {"HEX", 1, {FIELD_TYPE_VARBINARY}, FIELD_TYPE_STRING, hexFunc, NULL}, + {"HEX", 1, {FIELD_TYPE_VARBINARY}, FIELD_TYPE_STRING, func_hex, NULL}, {"IFNULL", 2, {FIELD_TYPE_ANY, FIELD_TYPE_ANY}, FIELD_TYPE_SCALAR, sql_builtin_stub, NULL}, -- 2.25.1