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Diffstat (limited to 'mariadb-connector-c-v_2.3.7/libmariadb/strto.c')
| -rw-r--r-- | mariadb-connector-c-v_2.3.7/libmariadb/strto.c | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/mariadb-connector-c-v_2.3.7/libmariadb/strto.c b/mariadb-connector-c-v_2.3.7/libmariadb/strto.c new file mode 100644 index 0000000..17e6dbe --- /dev/null +++ b/mariadb-connector-c-v_2.3.7/libmariadb/strto.c @@ -0,0 +1,209 @@ +/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB + + This library is free software; you can redistribute it and/or + modify it under the terms of the GNU Library General Public + License as published by the Free Software Foundation; either + version 2 of the License, or (at your option) any later version. + + This library 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with this library; if not, write to the Free + Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, + MA 02111-1301, USA */ + +/* + strtol,strtoul,strtoll,strtoull + convert string to long, unsigned long, long long or unsigned long long. + strtoxx(char *src,char **ptr,int base) + converts the string pointed to by src to an long of appropriate long and + returnes it. It skips leading spaces and tabs (but not newlines, formfeeds, + backspaces), then it accepts an optional sign and a sequence of digits + in the specified radix. + If the value of ptr is not (char **)NULL, a pointer to the character + terminating the scan is returned in the location pointed to by ptr. + Trailing spaces will NOT be skipped. + + If an error is detected, the result will be LONG_MIN, 0 or LONG_MAX, + (or LONGLONG..) and errno will be set to + EDOM if there are no digits + ERANGE if the result would overflow. + the ptr will be set to src. + This file is based on the strtol from the the GNU C Library. + it can be compiled with the UNSIGNED and/or LONGLONG flag set +*/ + +#define strtoll glob_strtoll /* Fix for True64 */ + +#include "m_string.h" +#include "m_ctype.h" +#include "my_sys.h" /* defines errno */ +#include <errno.h> + +#undef strtoull +#undef strtoll +#undef strtoul +#undef strtol +#ifdef USE_LONGLONG +#define UTYPE_MAX (~(ulonglong) 0) +#define TYPE_MIN LONGLONG_MIN +#define TYPE_MAX LONGLONG_MAX +#define longtype longlong +#define ulongtype ulonglong +#ifdef USE_UNSIGNED +#define function ulongtype strtoull +#else +#define function longtype strtoll +#endif +#else +#define UTYPE_MAX (ulong) ~0L +#define TYPE_MIN LONG_MIN +#define TYPE_MAX LONG_MAX +#define longtype long +#define ulongtype unsigned long +#ifdef USE_UNSIGNED +#define function ulongtype strtoul +#else +#define function longtype strtol +#endif +#endif + + +/* Convert NPTR to an `unsigned long int' or `long int' in base BASE. + If BASE is 0 the base is determined by the presence of a leading + zero, indicating octal or a leading "0x" or "0X", indicating hexadecimal. + If BASE is < 2 or > 36, it is reset to 10. + If ENDPTR is not NULL, a pointer to the character after the last + one converted is stored in *ENDPTR. */ + + +function (const char *nptr,char **endptr,int base) +{ + int negative; + register ulongtype cutoff; + register unsigned int cutlim; + register ulongtype i; + register const char *s; + register unsigned char c; + const char *save; + int overflow; + + if (base < 0 || base == 1 || base > 36) + base = 10; + + s = nptr; + + /* Skip white space. */ + while (isspace (*s)) + ++s; + if (*s == '\0') + { + goto noconv; + } + + /* Check for a sign. */ + if (*s == '-') + { + negative = 1; + ++s; + } + else if (*s == '+') + { + negative = 0; + ++s; + } + else + negative = 0; + + if (base == 16 && s[0] == '0' && toupper (s[1]) == 'X') + s += 2; + + /* If BASE is zero, figure it out ourselves. */ + if (base == 0) + { + if (*s == '0') + { + if (toupper (s[1]) == 'X') + { + s += 2; + base = 16; + } + else + base = 8; + } + else + base = 10; + } + + /* Save the pointer so we can check later if anything happened. */ + save = s; + + cutoff = UTYPE_MAX / (unsigned long int) base; + cutlim = (uint) (UTYPE_MAX % (unsigned long int) base); + + overflow = 0; + i = 0; + for (c = *s; c != '\0'; c = *++s) + { + if (isdigit (c)) + c -= '0'; + else if (isalpha (c)) + c = toupper (c) - 'A' + 10; + else + break; + if (c >= base) + break; + /* Check for overflow. */ + if (i > cutoff || (i == cutoff && c > cutlim)) + overflow = 1; + else + { + i *= (ulongtype) base; + i += c; + } + } + + /* Check if anything actually happened. */ + if (s == save) + goto noconv; + + /* Store in ENDPTR the address of one character + past the last character we converted. */ + if (endptr != NULL) + *endptr = (char *) s; + +#ifndef USE_UNSIGNED + /* Check for a value that is within the range of + `unsigned long int', but outside the range of `long int'. */ + if (negative) + { + if (i > (ulongtype) TYPE_MIN) + overflow = 1; + } + else if (i > (ulongtype) TYPE_MAX) + overflow = 1; +#endif + + if (overflow) + { + my_errno=ERANGE; +#ifdef USE_UNSIGNED + return UTYPE_MAX; +#else + return negative ? TYPE_MIN : TYPE_MAX; +#endif + } + + /* Return the result of the appropriate sign. */ + return (negative ? -((longtype) i) : (longtype) i); + +noconv: + /* There was no number to convert. */ + my_errno=EDOM; + if (endptr != NULL) + *endptr = (char *) nptr; + return 0L; +} |