my_error.c
上传用户:romrleung
上传日期:2022-05-23
资源大小:18897k
文件大小:5k
- /* Copyright (C) 2000 MySQL AB
- 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; either version 2 of the License, or
- (at your option) any later version.
- 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
- #include "mysys_priv.h"
- #include "mysys_err.h"
- #include <m_string.h>
- #include <stdarg.h>
- #include <m_ctype.h>
- /* Define some external variables for error handling */
- const char ** NEAR my_errmsg[MAXMAPS]={0,0,0,0};
- char NEAR errbuff[NRERRBUFFS][ERRMSGSIZE];
- /*
- Error message to user
- SYNOPSIS
- my_error()
- nr Errno
- MyFlags Flags
- ... variable list
- NOTE
- The following subset of printf format is supported:
- "%[0-9.-]*l?[sdu]", where all length flags are parsed but ignored.
- Additionally "%.*s" is supported and "%.*[ud]" is correctly parsed but
- the length value is ignored.
- */
- int my_error(int nr,myf MyFlags, ...)
- {
- va_list ap;
- uint olen, plen;
- reg1 const char *tpos;
- reg2 char *endpos;
- char * par;
- char ebuff[ERRMSGSIZE+20];
- int prec_chars; /* output precision */
- my_bool prec_supplied;
- DBUG_ENTER("my_error");
- LINT_INIT(prec_chars); /* protected by prec_supplied */
- va_start(ap,MyFlags);
- DBUG_PRINT("my", ("nr: %d MyFlags: %d errno: %d", nr, MyFlags, errno));
- if (nr / ERRMOD == GLOB && my_errmsg[GLOB] == 0)
- init_glob_errs();
- olen=(uint) strlen(tpos=my_errmsg[nr / ERRMOD][nr % ERRMOD]);
- endpos=ebuff;
- while (*tpos)
- {
- if (tpos[0] != '%')
- {
- *endpos++= *tpos++; /* Copy ordinary char */
- continue;
- }
- if (*++tpos == '%') /* test if %% */
- {
- olen--;
- }
- else
- {
- /*
- Skip size/precision flags to be compatible with printf.
- The only size/precision flag supported is "%.*s".
- If "%.*u" or "%.*d" are encountered, the precision number is read
- from the variable argument list but its value is ignored.
- */
- prec_supplied= 0;
- if (*tpos== '.')
- {
- tpos++;
- olen--;
- if (*tpos == '*')
- {
- tpos++;
- olen--;
- prec_chars= va_arg(ap, int); /* get length parameter */
- prec_supplied= 1;
- }
- }
- if (!prec_supplied)
- {
- while (my_isdigit(&my_charset_latin1, *tpos) || *tpos == '.' ||
- *tpos == '-')
- tpos++;
- if (*tpos == 'l') /* Skip 'l' argument */
- tpos++;
- }
- if (*tpos == 's') /* String parameter */
- {
- par= va_arg(ap, char *);
- plen= (uint) strlen(par);
- if (prec_supplied && prec_chars > 0)
- plen= min((uint)prec_chars, plen);
- if (olen + plen < ERRMSGSIZE+2) /* Replace if possible */
- {
- strmake(endpos, par, plen);
- endpos+= plen;
- tpos++;
- olen+= plen-2;
- continue;
- }
- }
- else if (*tpos == 'd' || *tpos == 'u') /* Integer parameter */
- {
- register int iarg;
- iarg= va_arg(ap, int);
- if (*tpos == 'd')
- plen= (uint) (int10_to_str((long) iarg, endpos, -10) - endpos);
- else
- plen= (uint) (int10_to_str((long) (uint) iarg, endpos, 10) - endpos);
- if (olen + plen < ERRMSGSIZE+2) /* Replace parameter if possible */
- {
- endpos+= plen;
- tpos++;
- olen+= plen-2;
- continue;
- }
- }
- }
- *endpos++= '%'; /* % used as % or unknown code */
- }
- *endpos= ' '; /* End of errmessage */
- va_end(ap);
- DBUG_RETURN((*error_handler_hook)(nr, ebuff, MyFlags));
- }
- /*
- Error as printf
- SYNOPSIS
- my_printf_error()
- error Errno
- format Format string
- MyFlags Flags
- ... variable list
- */
- int my_printf_error(uint error, const char *format, myf MyFlags, ...)
- {
- va_list args;
- char ebuff[ERRMSGSIZE+20];
- va_start(args,MyFlags);
- (void) vsprintf (ebuff,format,args);
- va_end(args);
- return (*error_handler_hook)(error, ebuff, MyFlags);
- }
- /*
- Give message using error_handler_hook
- SYNOPSIS
- my_message()
- error Errno
- str Error message
- MyFlags Flags
- */
- int my_message(uint error, const char *str, register myf MyFlags)
- {
- return (*error_handler_hook)(error, str, MyFlags);
- }