dlls/msvcrt/misc.c

   1 /*
   2  * msvcrt.dll misc functions
   3  *
   4  * Copyright 2000 Jon Griffiths
   5  *
   6  * This library is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This library is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this library; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  */
  20
  21 #include "config.h"
  22 #include "wine/port.h"
  23
  24 #include <stdlib.h>
  25
  26 #include "msvcrt.h"
  27 #include "wine/debug.h"
  28
  29 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  30
  31
  32 /*********************************************************************
  33  *              _beep (MSVCRT.@)
  34  */
  35 void _beep( unsigned int freq, unsigned int duration)
  36 {
  37     TRACE(":Freq %d, Duration %d\n",freq,duration);
  38     Beep(freq, duration);
  39 }
  40
  41 /*********************************************************************
  42  *              rand (MSVCRT.@)
  43  */
  44 int MSVCRT_rand()
  45 {
  46   return (rand() & 0x7fff);
  47 }
  48
  49 /*********************************************************************
  50  *              _sleep (MSVCRT.@)
  51  */
  52 void _sleep(unsigned long timeout)
  53 {
  54   TRACE("_sleep for %ld milliseconds\n",timeout);
  55   Sleep((timeout)?timeout:1);
  56 }
  57
  58 /*********************************************************************
  59  *              _lfind (MSVCRT.@)
  60  */
  61 void* _lfind(const void* match, const void* start,
  62              unsigned int* array_size, unsigned int elem_size,
  63              int (*cf)(const void*,const void*) )
  64 {
  65   unsigned int size = *array_size;
  66   if (size)
  67     do
  68     {
  69       if (cf(match, start) == 0)
  70         return (void *)start; /* found */
  71       start = (char*)start + elem_size;
  72     } while (--size);
  73   return NULL;
  74 }
  75
  76 /*********************************************************************
  77  *              _lsearch (MSVCRT.@)
  78  */
  79 void* _lsearch(const void* match, void* start,
  80                unsigned int* array_size, unsigned int elem_size,
  81                int (*cf)(const void*,const void*) )
  82 {
  83   unsigned int size = *array_size;
  84   if (size)
  85     do
  86     {
  87       if (cf(match, start) == 0)
  88         return start; /* found */
  89       start = (char*)start + elem_size;
  90     } while (--size);
  91
  92   /* not found, add to end */
  93   memcpy(start, match, elem_size);
  94   array_size[0]++;
  95   return start;
  96 }
  97
  98 /*********************************************************************
  99  *              _chkesp (MSVCRT.@)
 100  *
 101  * Trap to a debugger if the value of the stack pointer has changed.
 102  *
 103  * PARAMS
 104  *  None.
 105  *
 106  * RETURNS
 107  *  Does not return.
 108  *
 109  * NOTES
 110  *  This function is available for iX86 only.
 111  *
 112  *  When VC++ generates debug code, it stores the value of the stack pointer
 113  *  before calling any external function, and checks the value following
 114  *  the call. It then calls this function, which will trap if the values are
 115  *  not the same. Usually this means that the prototype used to call
 116  *  the function is incorrect.  It can also mean that the .spec entry has
 117  *  the wrong calling convention or parameters.
 118  */
 119 #ifdef __i386__
 120
 121 # ifdef __GNUC__
 122
 123 __ASM_GLOBAL_FUNC(_chkesp,
 124                   "jnz 1f\n\t"
 125                   "ret\n"
 126                   "1:\tpushl %ebp\n\t"
 127                   "movl %esp,%ebp\n\t"
 128                   "pushl %eax\n\t"
 129                   "pushl %ecx\n\t"
 130                   "pushl %edx\n\t"
 131                   "call " __ASM_NAME("MSVCRT_chkesp_fail") "\n\t"
 132                   "popl %edx\n\t"
 133                   "popl %ecx\n\t"
 134                   "popl %eax\n\t"
 135                   "popl %ebp\n\t"
 136                   "ret");
 137
 138 void MSVCRT_chkesp_fail(void)
 139 {
 140   ERR("Stack pointer incorrect after last function call - Bad prototype/spec entry?\n");
 141   DebugBreak();
 142 }
 143
 144 # else  /* __GNUC__ */
 145
 146 /**********************************************************************/
 147
 148 void _chkesp(void)
 149 {
 150 }
 151
 152 # endif  /* __GNUC__ */
 153
 154 #endif  /* __i386__ */