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 "msvcrt/stdlib.h"
  28
  29 #include "wine/debug.h"
  30
  31 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  32
  33
  34 /*********************************************************************
  35  *              _beep (MSVCRT.@)
  36  */
  37 void _beep( unsigned int freq, unsigned int duration)
  38 {
  39     TRACE(":Freq %d, Duration %d\n",freq,duration);
  40     Beep(freq, duration);
  41 }
  42
  43 /*********************************************************************
  44  *              rand (MSVCRT.@)
  45  */
  46 int MSVCRT_rand()
  47 {
  48   return (rand() & 0x7fff);
  49 }
  50
  51 /*********************************************************************
  52  *              _sleep (MSVCRT.@)
  53  */
  54 void _sleep(unsigned long timeout)
  55 {
  56   TRACE("_sleep for %ld milliseconds\n",timeout);
  57   Sleep((timeout)?timeout:1);
  58 }
  59
  60 /*********************************************************************
  61  *              _lfind (MSVCRT.@)
  62  */
  63 void* _lfind(const void* match, const void* start,
  64              unsigned int* array_size, unsigned int elem_size,
  65              int (*cf)(const void*,const void*) )
  66 {
  67   unsigned int size = *array_size;
  68   if (size)
  69     do
  70     {
  71       if (cf(match, start) == 0)
  72         return (void *)start; /* found */
  73       start = (char*)start + elem_size;
  74     } while (--size);
  75   return NULL;
  76 }
  77
  78 /*********************************************************************
  79  *              _lsearch (MSVCRT.@)
  80  */
  81 void* _lsearch(const void* match, void* start,
  82                unsigned int* array_size, unsigned int elem_size,
  83                int (*cf)(const void*,const void*) )
  84 {
  85   unsigned int size = *array_size;
  86   if (size)
  87     do
  88     {
  89       if (cf(match, start) == 0)
  90         return start; /* found */
  91       start = (char*)start + elem_size;
  92     } while (--size);
  93
  94   /* not found, add to end */
  95   memcpy(start, match, elem_size);
  96   array_size[0]++;
  97   return start;
  98 }
  99
 100 /*********************************************************************
 101  *              _chkesp (MSVCRT.@)
 102  *
 103  * Trap to a debugger if the value of the stack pointer has changed.
 104  *
 105  * PARAMS
 106  *  None.
 107  *
 108  * RETURNS
 109  *  Does not return.
 110  *
 111  * NOTES
 112  *  This function is available for iX86 only.
 113  *
 114  *  When VC++ generates debug code, it stores the value of the stack pointer
 115  *  before calling any external function, and checks the value following
 116  *  the call. It then calls this function, which will trap if the values are
 117  *  not the same. Usually this means that the prototype used to call
 118  *  the function is incorrect.  It can also mean that the .spec entry has
 119  *  the wrong calling convention or parameters.
 120  */
 121 #ifdef __i386__
 122
 123 # ifdef __GNUC__
 124 __ASM_GLOBAL_FUNC(_chkesp,
 125                   "jnz 1f\n\t"
 126                   "ret\n"
 127                   "1:\tpushl %ebp\n\t"
 128                   "movl %esp,%ebp\n\t"
 129                   "pushl %eax\n\t"
 130                   "pushl %ecx\n\t"
 131                   "pushl %edx\n\t"
 132                   "call " __ASM_NAME("MSVCRT_chkesp_fail") "\n\t"
 133                   "popl %edx\n\t"
 134                   "popl %ecx\n\t"
 135                   "popl %eax\n\t"
 136                   "popl %ebp\n\t"
 137                   "ret");
 138
 139 void MSVCRT_chkesp_fail(void)
 140 {
 141   ERR("Stack pointer incorrect after last function call - Bad prototype/spec entry?\n");
 142   DebugBreak();
 143 }
 144
 145 # else  /* __GNUC__ */
 146 void _chkesp(void) { }
 147 # endif  /* __GNUC__ */
 148
 149 #endif  /* __i386__ */