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Diffstat (limited to '')
| -rw-r--r-- | storage/innobase/include/ut0mem.inl | 246 |
1 files changed, 246 insertions, 0 deletions
diff --git a/storage/innobase/include/ut0mem.inl b/storage/innobase/include/ut0mem.inl new file mode 100644 index 00000000..cc95a036 --- /dev/null +++ b/storage/innobase/include/ut0mem.inl @@ -0,0 +1,246 @@ +/***************************************************************************** + +Copyright (c) 1994, 2014, Oracle and/or its affiliates. All Rights Reserved. +Copyright (c) 2017, 2019, MariaDB Corporation. + +This program is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free Software +Foundation; version 2 of the License. + +This program is distributed in the hope that it will be useful, but WITHOUT +ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS +FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. + +You should have received a copy of the GNU General Public License along with +this program; if not, write to the Free Software Foundation, Inc., +51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA + +*****************************************************************************/ + +/*******************************************************************//** +@file include/ut0mem.ic +Memory primitives + +Created 5/30/1994 Heikki Tuuri +************************************************************************/ + +#include "ut0byte.h" +#include "mach0data.h" + +/**********************************************************************//** +Converts a raw binary data to a NUL-terminated hex string. The output is +truncated if there is not enough space in "hex", make sure "hex_size" is at +least (2 * raw_size + 1) if you do not want this to happen. Returns the +actual number of characters written to "hex" (including the NUL). +@return number of chars written */ +UNIV_INLINE +ulint +ut_raw_to_hex( +/*==========*/ + const void* raw, /*!< in: raw data */ + ulint raw_size, /*!< in: "raw" length in bytes */ + char* hex, /*!< out: hex string */ + ulint hex_size) /*!< in: "hex" size in bytes */ +{ + +#ifdef WORDS_BIGENDIAN + +#define MK_UINT16(a, b) (((uint16) (a)) << 8 | (uint16) (b)) + +#define UINT16_GET_A(u) ((char) ((u) >> 8)) +#define UINT16_GET_B(u) ((char) ((u) & 0xFF)) + +#else /* WORDS_BIGENDIAN */ + +#define MK_UINT16(a, b) (((uint16) (b)) << 8 | (uint16) (a)) + +#define UINT16_GET_A(u) ((char) ((u) & 0xFF)) +#define UINT16_GET_B(u) ((char) ((u) >> 8)) + +#endif /* WORDS_BIGENDIAN */ + +#define MK_ALL_UINT16_WITH_A(a) \ + MK_UINT16(a, '0'), \ + MK_UINT16(a, '1'), \ + MK_UINT16(a, '2'), \ + MK_UINT16(a, '3'), \ + MK_UINT16(a, '4'), \ + MK_UINT16(a, '5'), \ + MK_UINT16(a, '6'), \ + MK_UINT16(a, '7'), \ + MK_UINT16(a, '8'), \ + MK_UINT16(a, '9'), \ + MK_UINT16(a, 'A'), \ + MK_UINT16(a, 'B'), \ + MK_UINT16(a, 'C'), \ + MK_UINT16(a, 'D'), \ + MK_UINT16(a, 'E'), \ + MK_UINT16(a, 'F') + + static const uint16 hex_map[256] = { + MK_ALL_UINT16_WITH_A('0'), + MK_ALL_UINT16_WITH_A('1'), + MK_ALL_UINT16_WITH_A('2'), + MK_ALL_UINT16_WITH_A('3'), + MK_ALL_UINT16_WITH_A('4'), + MK_ALL_UINT16_WITH_A('5'), + MK_ALL_UINT16_WITH_A('6'), + MK_ALL_UINT16_WITH_A('7'), + MK_ALL_UINT16_WITH_A('8'), + MK_ALL_UINT16_WITH_A('9'), + MK_ALL_UINT16_WITH_A('A'), + MK_ALL_UINT16_WITH_A('B'), + MK_ALL_UINT16_WITH_A('C'), + MK_ALL_UINT16_WITH_A('D'), + MK_ALL_UINT16_WITH_A('E'), + MK_ALL_UINT16_WITH_A('F') + }; + const unsigned char* rawc; + ulint read_bytes; + ulint write_bytes; + ulint i; + + rawc = (const unsigned char*) raw; + + if (hex_size == 0) { + + return(0); + } + + if (hex_size <= 2 * raw_size) { + + read_bytes = hex_size / 2; + write_bytes = hex_size; + } else { + + read_bytes = raw_size; + write_bytes = 2 * raw_size + 1; + } + +#define LOOP_READ_BYTES(ASSIGN) \ + for (i = 0; i < read_bytes; i++) { \ + ASSIGN; \ + hex += 2; \ + rawc++; \ + } + + if (ut_align_offset(hex, 2) == 0) { + + LOOP_READ_BYTES( + *(uint16*) hex = hex_map[*rawc] + ); + } else { + + LOOP_READ_BYTES( + *hex = UINT16_GET_A(hex_map[*rawc]); + *(hex + 1) = UINT16_GET_B(hex_map[*rawc]) + ); + } + + if (hex_size <= 2 * raw_size && hex_size % 2 == 0) { + + hex--; + } + + *hex = '\0'; + + return(write_bytes); +} + +/*******************************************************************//** +Adds single quotes to the start and end of string and escapes any quotes +by doubling them. Returns the number of bytes that were written to "buf" +(including the terminating NUL). If buf_size is too small then the +trailing bytes from "str" are discarded. +@return number of bytes that were written */ +UNIV_INLINE +ulint +ut_str_sql_format( +/*==============*/ + const char* str, /*!< in: string */ + ulint str_len, /*!< in: string length in bytes */ + char* buf, /*!< out: output buffer */ + ulint buf_size) /*!< in: output buffer size + in bytes */ +{ + ulint str_i; + ulint buf_i; + + buf_i = 0; + + switch (buf_size) { + case 3: + + if (str_len == 0) { + + buf[buf_i] = '\''; + buf_i++; + buf[buf_i] = '\''; + buf_i++; + } + /* FALLTHROUGH */ + case 2: + case 1: + + buf[buf_i] = '\0'; + buf_i++; + /* FALLTHROUGH */ + case 0: + + return(buf_i); + } + + /* buf_size >= 4 */ + + buf[0] = '\''; + buf_i = 1; + + for (str_i = 0; str_i < str_len; str_i++) { + + char ch; + + if (buf_size - buf_i == 2) { + + break; + } + + ch = str[str_i]; + + switch (ch) { + case '\0': + + if (buf_size - buf_i < 4) { + + goto func_exit; + } + buf[buf_i] = '\\'; + buf_i++; + buf[buf_i] = '0'; + buf_i++; + break; + case '\'': + case '\\': + + if (buf_size - buf_i < 4) { + + goto func_exit; + } + buf[buf_i] = ch; + buf_i++; + /* FALLTHROUGH */ + default: + + buf[buf_i] = ch; + buf_i++; + } + } + +func_exit: + + buf[buf_i] = '\''; + buf_i++; + buf[buf_i] = '\0'; + buf_i++; + + return(buf_i); +} |