Memory primitives.
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#include "univ.i"
#include "os0event.h"
#include "ut0mutex.h"
#include "ut0mem.ic"
Go to the source code of this file.
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| namespace | ut |
| | This file contains a set of libraries providing overloads for regular dynamic allocation routines which allow for opt-in memory instrumentation through performance schema memory engine (PFS).
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| static void * | ut_memcpy (void *dest, const void *src, ulint n) |
| | Wrapper for memcpy(3). More...
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| static void * | ut_memmove (void *dest, const void *src, ulint n) |
| | Wrapper for memmove(3). More...
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| static int | ut_memcmp (const void *str1, const void *str2, ulint n) |
| | Wrapper for memcmp(3). More...
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| static char * | ut_strcpy (char *dest, const char *src) |
| | Wrapper for strcpy(3). More...
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| static ulint | ut_strlen (const char *str) |
| | Wrapper for strlen(3). More...
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| static int | ut_strcmp (const char *str1, const char *str2) |
| | Wrapper for strcmp(3). More...
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| ulint | ut_strlcpy (char *dst, const char *src, ulint size) |
| | Copies up to size - 1 characters from the NUL-terminated string src to dst, NUL-terminating the result. More...
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| char * | ut_str3cat (const char *s1, const char *s2, const char *s3) |
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| static ulint | ut_raw_to_hex (const void *raw, ulint raw_size, char *hex, ulint hex_size) |
| | Converts a raw binary data to a NUL-terminated hex string. More...
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| static ulint | ut_str_sql_format (const char *str, ulint str_len, char *buf, ulint buf_size) |
| | Adds single quotes to the start and end of string and escapes any quotes by doubling them. More...
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| template<typename T > |
| bool | ut::is_aligned_as (void const *const ptr) |
| | Checks if the pointer has address aligned properly for a given type. More...
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| bool | ut::is_zeros (const void *start, size_t number_of_bytes) |
| | Checks if memory range is all zeros. More...
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Memory primitives.
Created 5/30/1994 Heikki Tuuri
◆ ut_memcmp()
| static int ut_memcmp |
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const void * |
str1, |
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const void * |
str2, |
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ulint |
n |
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) |
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inlinestatic |
Wrapper for memcmp(3).
Compare memory areas.
- Parameters
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| [in] | str1 | first memory block to compare |
| [in] | str2 | second memory block to compare |
| [in] | n | number of bytes to compare |
- Returns
- negative, 0, or positive if str1 is smaller, equal, or greater than str2, respectively.
◆ ut_memcpy()
| static void * ut_memcpy |
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void * |
dest, |
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const void * |
src, |
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ulint |
n |
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) |
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inlinestatic |
Wrapper for memcpy(3).
Copy memory area when the source and target are not overlapping.
- Parameters
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| [in,out] | dest | copy to |
| [in] | src | copy from |
| [in] | n | number of bytes to copy |
- Returns
- dest
◆ ut_memmove()
| static void * ut_memmove |
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void * |
dest, |
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const void * |
src, |
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ulint |
n |
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) |
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inlinestatic |
Wrapper for memmove(3).
Copy memory area when the source and target are overlapping.
- Parameters
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| [in,out] | dest | Move to |
| [in] | src | Move from |
| [in] | n | number of bytes to move |
- Returns
- dest
◆ ut_raw_to_hex()
| static ulint ut_raw_to_hex |
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const void * |
raw, |
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ulint |
raw_size, |
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char * |
hex, |
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ulint |
hex_size |
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) |
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inlinestatic |
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).
- Parameters
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| [in] | raw | raw data |
| [in] | raw_size | "raw" length in bytes |
| [out] | hex | hex string |
| [in] | hex_size | "hex" size in bytes |
- Returns
- number of chars written
◆ ut_str3cat()
| char * ut_str3cat |
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const char * |
s1, |
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const char * |
s2, |
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const char * |
s3 |
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) |
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◆ ut_str_sql_format()
| static ulint ut_str_sql_format |
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const char * |
str, |
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ulint |
str_len, |
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char * |
buf, |
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ulint |
buf_size |
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) |
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inlinestatic |
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.
- Parameters
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| [in] | str | string |
| [in] | str_len | string length in bytes |
| [out] | buf | output buffer |
| [in] | buf_size | output buffer size in bytes |
- Returns
- number of bytes that were written
◆ ut_strcmp()
| static int ut_strcmp |
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const char * |
str1, |
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const char * |
str2 |
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) |
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inlinestatic |
Wrapper for strcmp(3).
Compare NUL-terminated strings.
- Parameters
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| [in] | str1 | first string to compare |
| [in] | str2 | second string to compare |
- Returns
- negative, 0, or positive if str1 is smaller, equal, or greater than str2, respectively.
◆ ut_strcpy()
| static char * ut_strcpy |
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char * |
dest, |
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const char * |
src |
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) |
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inlinestatic |
Wrapper for strcpy(3).
Copy a NUL-terminated string.
- Parameters
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| [in,out] | dest | Destination to copy to |
| [in] | src | Source to copy from |
- Returns
- dest
◆ ut_strlcpy()
| ulint ut_strlcpy |
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char * |
dst, |
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const char * |
src, |
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ulint |
size |
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) |
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Copies up to size - 1 characters from the NUL-terminated string src to dst, NUL-terminating the result.
Returns strlen(src), so truncation occurred if the return value >= size.
- Returns
- strlen(src) in: size of destination buffer
Returns strlen(src), so truncation occurred if the return value >= size.
- Returns
- strlen(src)
- Parameters
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| dst | in: destination buffer |
| src | in: source buffer |
| size | in: size of destination buffer |
◆ ut_strlen()
| static ulint ut_strlen |
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const char * |
str | ) |
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inlinestatic |
Wrapper for strlen(3).
Determine the length of a NUL-terminated string.
- Parameters
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- Returns
- length of the string in bytes, excluding the terminating NUL
1.9.2