diff options
Diffstat (limited to 'mysql/m_string.h')
| -rw-r--r-- | mysql/m_string.h | 341 |
1 files changed, 0 insertions, 341 deletions
diff --git a/mysql/m_string.h b/mysql/m_string.h deleted file mode 100644 index ee9f869..0000000 --- a/mysql/m_string.h +++ /dev/null @@ -1,341 +0,0 @@ -/* - Copyright (c) 2000, 2015, Oracle and/or its affiliates. All rights reserved. - - 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 St, Fifth Floor, Boston, MA 02110-1301 USA */ - -#ifndef _m_string_h -#define _m_string_h - -#include "my_global.h" /* HAVE_* */ - -#include <string.h> - -#define bfill please_use_memset_rather_than_bfill -#define bzero please_use_memset_rather_than_bzero -#define bmove please_use_memmove_rather_than_bmove -#define strmov please_use_my_stpcpy_or_my_stpmov_rather_than_strmov -#define strnmov please_use_my_stpncpy_or_my_stpnmov_rather_than_strnmov - -#include "mysql/service_my_snprintf.h" - -#if defined(__cplusplus) -extern "C" { -#endif - -/* - my_str_malloc(), my_str_realloc() and my_str_free() are assigned to - implementations in strings/alloc.c, but can be overridden in - the calling program. - */ -extern void *(*my_str_malloc)(size_t); -extern void *(*my_str_realloc)(void *, size_t); -extern void (*my_str_free)(void *); - -/* Declared in int2str() */ -extern char _dig_vec_upper[]; -extern char _dig_vec_lower[]; - - /* Prototypes for string functions */ - -extern void bchange(uchar *dst,size_t old_len,const uchar *src, - size_t new_len,size_t tot_len); -extern void strappend(char *s,size_t len,pchar fill); -extern char *strend(const char *s); -extern char *strcend(const char *, pchar); -extern char *strfill(char * s,size_t len,pchar fill); -extern char *strmake(char *dst,const char *src,size_t length); - -extern char *my_stpmov(char *dst,const char *src); -extern char *my_stpnmov(char *dst, const char *src, size_t n); -extern char *strcont(const char *src, const char *set); -extern char *strxmov(char *dst, const char *src, ...); -extern char *strxnmov(char *dst, size_t len, const char *src, ...); - -/** - Copy a string from src to dst until (and including) terminating null byte. - - @param dst Destination - @param src Source - - @note src and dst cannot overlap. - Use my_stpmov() if src and dst overlaps. - - @note Unsafe, consider using my_stpnpy() instead. - - @return pointer to terminating null byte. -*/ -static inline char *my_stpcpy(char *dst, const char *src) -{ -#if defined(HAVE_BUILTIN_STPCPY) - return __builtin_stpcpy(dst, src); -#elif defined(HAVE_STPCPY) - return stpcpy(dst, src); -#else - /* Fallback to implementation supporting overlap. */ - return my_stpmov(dst, src); -#endif -} - -/** - Copy fixed-size string from src to dst. - - @param dst Destination - @param src Source - @param n Maximum number of characters to copy. - - @note src and dst cannot overlap - Use my_stpnmov() if src and dst overlaps. - - @return pointer to terminating null byte. -*/ -static inline char *my_stpncpy(char *dst, const char *src, size_t n) -{ -#if defined(HAVE_STPNCPY) - return stpncpy(dst, src, n); -#else - /* Fallback to implementation supporting overlap. */ - return my_stpnmov(dst, src, n); -#endif -} - -static inline longlong my_strtoll(const char *nptr, char **endptr, int base) -{ -#if defined _WIN32 - return _strtoi64(nptr, endptr, base); -#else - return strtoll(nptr, endptr, base); -#endif -} - -static inline ulonglong my_strtoull(const char *nptr, char **endptr, int base) -{ -#if defined _WIN32 - return _strtoui64(nptr, endptr, base); -#else - return strtoull(nptr, endptr, base); -#endif -} - -static inline char *my_strtok_r(char *str, const char *delim, char **saveptr) -{ -#if defined _WIN32 - return strtok_s(str, delim, saveptr); -#else - return strtok_r(str, delim, saveptr); -#endif -} - -/* native_ rather than my_ since my_strcasecmp already exists */ -static inline int native_strcasecmp(const char *s1, const char *s2) -{ -#if defined _WIN32 - return _stricmp(s1, s2); -#else - return strcasecmp(s1, s2); -#endif -} - -/* native_ rather than my_ for consistency with native_strcasecmp */ -static inline int native_strncasecmp(const char *s1, const char *s2, size_t n) -{ -#if defined _WIN32 - return _strnicmp(s1, s2, n); -#else - return strncasecmp(s1, s2, n); -#endif -} - -/* Prototypes of normal stringfunctions (with may ours) */ -#ifndef HAVE_STRNLEN -extern size_t strnlen(const char *s, size_t n); -#endif - -extern int is_prefix(const char *, const char *); - -/* Conversion routines */ -typedef enum { - MY_GCVT_ARG_FLOAT, - MY_GCVT_ARG_DOUBLE -} my_gcvt_arg_type; - -double my_strtod(const char *str, char **end, int *error); -double my_atof(const char *nptr); -size_t my_fcvt(double x, int precision, char *to, my_bool *error); -size_t my_gcvt(double x, my_gcvt_arg_type type, int width, char *to, - my_bool *error); - -#define NOT_FIXED_DEC 31 - -/* - The longest string my_fcvt can return is 311 + "precision" bytes. - Here we assume that we never cal my_fcvt() with precision >= NOT_FIXED_DEC - (+ 1 byte for the terminating '\0'). -*/ -#define FLOATING_POINT_BUFFER (311 + NOT_FIXED_DEC) - -/* - We want to use the 'e' format in some cases even if we have enough space - for the 'f' one just to mimic sprintf("%.15g") behavior for large integers, - and to improve it for numbers < 10^(-4). - That is, for |x| < 1 we require |x| >= 10^(-15), and for |x| > 1 we require - it to be integer and be <= 10^DBL_DIG for the 'f' format to be used. - We don't lose precision, but make cases like "1e200" or "0.00001" look nicer. -*/ -#define MAX_DECPT_FOR_F_FORMAT DBL_DIG - -/* - The maximum possible field width for my_gcvt() conversion. - (DBL_DIG + 2) significant digits + sign + "." + ("e-NNN" or - MAX_DECPT_FOR_F_FORMAT zeros for cases when |x|<1 and the 'f' format is used). -*/ -#define MY_GCVT_MAX_FIELD_WIDTH (DBL_DIG + 4 + MY_MAX(5, MAX_DECPT_FOR_F_FORMAT)) \ - -extern char *llstr(longlong value,char *buff); -extern char *ullstr(longlong value,char *buff); - -extern char *int2str(long val, char *dst, int radix, int upcase); -extern char *int10_to_str(long val,char *dst,int radix); -extern char *str2int(const char *src,int radix,long lower,long upper, - long *val); -longlong my_strtoll10(const char *nptr, char **endptr, int *error); -#if SIZEOF_LONG == SIZEOF_LONG_LONG -#define ll2str(A,B,C,D) int2str((A),(B),(C),(D)) -#define longlong10_to_str(A,B,C) int10_to_str((A),(B),(C)) -#undef strtoll -#define strtoll(A,B,C) strtol((A),(B),(C)) -#define strtoull(A,B,C) strtoul((A),(B),(C)) -#else -extern char *ll2str(longlong val,char *dst,int radix, int upcase); -extern char *longlong10_to_str(longlong val,char *dst,int radix); -#endif -#define longlong2str(A,B,C) ll2str((A),(B),(C),1) - -#if defined(__cplusplus) -} -#endif - -/* - LEX_STRING -- a pair of a C-string and its length. - (it's part of the plugin API as a MYSQL_LEX_STRING) - Ditto LEX_CSTRING/MYSQL_LEX_CSTRING. -*/ - -#include <mysql/mysql_lex_string.h> -typedef struct st_mysql_lex_string LEX_STRING; -typedef struct st_mysql_const_lex_string LEX_CSTRING; - -#define STRING_WITH_LEN(X) (X), ((sizeof(X) - 1)) -#define USTRING_WITH_LEN(X) ((uchar*) X), ((sizeof(X) - 1)) -#define C_STRING_WITH_LEN(X) ((char *) (X)), ((sizeof(X) - 1)) - - -/** - Skip trailing space. - - On most systems reading memory in larger chunks (ideally equal to the size of - the chinks that the machine physically reads from memory) causes fewer memory - access loops and hence increased performance. - This is why the 'int' type is used : it's closest to that (according to how - it's defined in C). - So when we determine the amount of whitespace at the end of a string we do - the following : - 1. We divide the string into 3 zones : - a) from the start of the string (__start) to the first multiple - of sizeof(int) (__start_words) - b) from the end of the string (__end) to the last multiple of sizeof(int) - (__end_words) - c) a zone that is aligned to sizeof(int) and can be safely accessed - through an int * - 2. We start comparing backwards from (c) char-by-char. If all we find is - space then we continue - 3. If there are elements in zone (b) we compare them as unsigned ints to a - int mask (SPACE_INT) consisting of all spaces - 4. Finally we compare the remaining part (a) of the string char by char. - This covers for the last non-space unsigned int from 3. (if any) - - This algorithm works well for relatively larger strings, but it will slow - the things down for smaller strings (because of the additional calculations - and checks compared to the naive method). Thus the barrier of length 20 - is added. - - @param ptr pointer to the input string - @param len the length of the string - @return the last non-space character -*/ -#if defined(__sparc) || defined(__sparcv9) -static inline const uchar *skip_trailing_space(const uchar *ptr,size_t len) -{ - /* SPACE_INT is a word that contains only spaces */ -#if SIZEOF_INT == 4 - const unsigned SPACE_INT= 0x20202020U; -#elif SIZEOF_INT == 8 - const unsigned SPACE_INT= 0x2020202020202020ULL; -#else -#error define the appropriate constant for a word full of spaces -#endif - - const uchar *end= ptr + len; - - if (len > 20) - { - const uchar *end_words= (const uchar *)(intptr) - (((ulonglong)(intptr)end) / SIZEOF_INT * SIZEOF_INT); - const uchar *start_words= (const uchar *)(intptr) - ((((ulonglong)(intptr)ptr) + SIZEOF_INT - 1) / SIZEOF_INT * SIZEOF_INT); - - DBUG_ASSERT(end_words > ptr); - while (end > end_words && end[-1] == 0x20) - end--; - if (end[-1] == 0x20 && start_words < end_words) - while (end > start_words && ((unsigned *)end)[-1] == SPACE_INT) - end -= SIZEOF_INT; - } - while (end > ptr && end[-1] == 0x20) - end--; - return (end); -} -#else -/* - Reads 8 bytes at a time, ignoring alignment. - We use uint8korr, which is fast (it simply reads a *ulonglong) - on all platforms, except sparc. -*/ -static inline const uchar *skip_trailing_space(const uchar *ptr, size_t len) -{ - const uchar *end= ptr + len; - while (end - ptr >= 8) - { - if (uint8korr(end-8) != 0x2020202020202020ULL) - break; - end-= 8; - } - while (end > ptr && end[-1] == 0x20) - end--; - return (end); -} -#endif - -static inline void lex_string_set(LEX_STRING *lex_str, const char *c_str) -{ - lex_str->str= (char *) c_str; - lex_str->length= strlen(c_str); -} - -static inline void lex_cstring_set(LEX_CSTRING *lex_str, const char *c_str) -{ - lex_str->str= c_str; - lex_str->length= strlen(c_str); -} - -#endif |