275 lines
7.8 KiB
C
275 lines
7.8 KiB
C
/*
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* msvcrt.dll misc functions
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*
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* Copyright 2000 Jon Griffiths
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include "wine/port.h"
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#include <stdlib.h>
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#include "msvcrt.h"
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#include "wine/debug.h"
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#include "ntsecapi.h"
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WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
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/*********************************************************************
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* _beep (MSVCRT.@)
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*/
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void CDECL _beep( unsigned int freq, unsigned int duration)
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{
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TRACE(":Freq %d, Duration %d\n",freq,duration);
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Beep(freq, duration);
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}
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/*********************************************************************
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* srand (MSVCRT.@)
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*/
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void CDECL MSVCRT_srand( unsigned int seed )
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{
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thread_data_t *data = msvcrt_get_thread_data();
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data->random_seed = seed;
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}
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/*********************************************************************
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* rand (MSVCRT.@)
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*/
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int CDECL MSVCRT_rand(void)
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{
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thread_data_t *data = msvcrt_get_thread_data();
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/* this is the algorithm used by MSVC, according to
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* http://en.wikipedia.org/wiki/List_of_pseudorandom_number_generators */
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data->random_seed = data->random_seed * 214013 + 2531011;
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return (data->random_seed >> 16) & MSVCRT_RAND_MAX;
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}
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/*********************************************************************
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* rand_s (MSVCRT.@)
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*/
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int CDECL MSVCRT_rand_s(unsigned int *pval)
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{
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if (!pval || !RtlGenRandom(pval, sizeof(*pval)))
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{
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*MSVCRT__errno() = MSVCRT_EINVAL;
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return MSVCRT_EINVAL;
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}
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return 0;
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}
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/*********************************************************************
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* _sleep (MSVCRT.@)
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*/
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void CDECL MSVCRT__sleep(MSVCRT_ulong timeout)
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{
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TRACE("_sleep for %d milliseconds\n",timeout);
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Sleep((timeout)?timeout:1);
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}
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/*********************************************************************
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* _lfind (MSVCRT.@)
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*/
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void* CDECL _lfind(const void* match, const void* start,
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unsigned int* array_size, unsigned int elem_size,
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int (CDECL *cf)(const void*,const void*) )
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{
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unsigned int size = *array_size;
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if (size)
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do
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{
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if (cf(match, start) == 0)
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return (void *)start; /* found */
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start = (const char *)start + elem_size;
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} while (--size);
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return NULL;
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}
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/*********************************************************************
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* _lsearch (MSVCRT.@)
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*/
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void* CDECL _lsearch(const void* match, void* start,
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unsigned int* array_size, unsigned int elem_size,
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int (CDECL *cf)(const void*,const void*) )
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{
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unsigned int size = *array_size;
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if (size)
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do
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{
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if (cf(match, start) == 0)
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return start; /* found */
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start = (char*)start + elem_size;
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} while (--size);
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/* not found, add to end */
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memcpy(start, match, elem_size);
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array_size[0]++;
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return start;
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}
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/*********************************************************************
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* _chkesp (MSVCRT.@)
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*
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* Trap to a debugger if the value of the stack pointer has changed.
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*
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* PARAMS
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* None.
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*
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* RETURNS
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* Does not return.
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*
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* NOTES
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* This function is available for iX86 only.
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*
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* When VC++ generates debug code, it stores the value of the stack pointer
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* before calling any external function, and checks the value following
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* the call. It then calls this function, which will trap if the values are
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* not the same. Usually this means that the prototype used to call
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* the function is incorrect. It can also mean that the .spec entry has
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* the wrong calling convention or parameters.
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*/
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#ifdef __i386__
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# ifdef __GNUC__
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__ASM_GLOBAL_FUNC(_chkesp,
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"jnz 1f\n\t"
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"ret\n"
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"1:\tpushl %ebp\n\t"
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__ASM_CFI(".cfi_adjust_cfa_offset 4\n\t")
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__ASM_CFI(".cfi_rel_offset %ebp,0\n\t")
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"movl %esp,%ebp\n\t"
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__ASM_CFI(".cfi_def_cfa_register %ebp\n\t")
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"subl $12,%esp\n\t"
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"pushl %eax\n\t"
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"pushl %ecx\n\t"
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"pushl %edx\n\t"
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"call " __ASM_NAME("MSVCRT_chkesp_fail") "\n\t"
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"popl %edx\n\t"
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"popl %ecx\n\t"
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"popl %eax\n\t"
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"leave\n\t"
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__ASM_CFI(".cfi_def_cfa %esp,4\n\t")
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__ASM_CFI(".cfi_same_value %ebp\n\t")
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"ret")
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void CDECL MSVCRT_chkesp_fail(void)
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{
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ERR("Stack pointer incorrect after last function call - Bad prototype/spec entry?\n");
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DebugBreak();
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}
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# else /* __GNUC__ */
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/**********************************************************************/
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void CDECL _chkesp(void)
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{
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}
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# endif /* __GNUC__ */
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#endif /* __i386__ */
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/*********************************************************************
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* Helper function for MSVCRT_qsort_s.
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*
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* Based on NTDLL_qsort in dlls/ntdll/misc.c
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*/
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static void MSVCRT_mergesort( void *arr, void *barr, size_t elemsize,
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int (CDECL *compar)(void *, const void *, const void *),
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size_t left, size_t right, void *context )
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{
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if (right>left) {
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size_t i, j, k, m;
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m=left+(right-left)/2;
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MSVCRT_mergesort(arr, barr, elemsize, compar, left, m, context);
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MSVCRT_mergesort(arr, barr, elemsize, compar, m+1, right, context);
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#define X(a,i) ((char*)a+elemsize*(i))
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for (i=m+1; i>left; i--)
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memcpy (X(barr,(i-1)),X(arr,(i-1)),elemsize);
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for (j=m; j<right; j++)
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memcpy (X(barr,(right+m-j)),X(arr,(j+1)),elemsize);
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/* i=left; j=right; */
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for (k=left; i<=m && j>m; k++) {
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if (i==j || compar(context, X(barr,i),X(barr,j))<=0) {
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memcpy(X(arr,k),X(barr,i),elemsize);
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i++;
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} else {
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memcpy(X(arr,k),X(barr,j),elemsize);
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j--;
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}
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}
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for (; i<=m; i++, k++)
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memcpy(X(arr,k),X(barr,i),elemsize);
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for (; j>m; j--, k++)
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memcpy(X(arr,k),X(barr,j),elemsize);
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}
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#undef X
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}
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/*********************************************************************
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* qsort_s (MSVCRT.@)
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*
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* Based on NTDLL_qsort in dlls/ntdll/misc.c
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*/
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void CDECL MSVCRT_qsort_s(void *base, MSVCRT_size_t nmemb, MSVCRT_size_t size,
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int (CDECL *compar)(void *, const void *, const void *), void *context)
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{
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void *secondarr;
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const size_t total_size = nmemb*size;
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if (!MSVCRT_CHECK_PMT(base != NULL || (base == NULL && nmemb == 0)) ||
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!MSVCRT_CHECK_PMT(size > 0) || !MSVCRT_CHECK_PMT(compar != NULL) ||
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total_size / size != nmemb)
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{
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*MSVCRT__errno() = MSVCRT_EINVAL;
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return;
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}
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if (nmemb < 2) return;
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secondarr = MSVCRT_malloc(total_size);
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if (!secondarr)
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return;
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MSVCRT_mergesort(base, secondarr, size, compar, 0, nmemb-1, context);
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MSVCRT_free(secondarr);
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}
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/*********************************************************************
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* _get_output_format (MSVCRT.@)
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*/
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unsigned int CDECL _get_output_format(void)
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{
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return 0;
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}
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/*********************************************************************
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* _resetstkoflw (MSVCRT.@)
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*/
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int CDECL _resetstkoflw(void)
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{
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int stack_addr;
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/* causes stack fault that updates NtCurrentTeb()->Tib.StackLimit */
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return VirtualProtect( &stack_addr, 1, PAGE_GUARD|PAGE_READWRITE, NULL );
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}
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