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msvcrt: Rewrite va_list to string conversions to avoid depending on va_copy.

This commit is contained in:
Alexandre Julliard 2008-12-17 12:55:30 +01:00
parent 561cf9f746
commit 6718b9bce7
1 changed files with 53 additions and 88 deletions
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141
dlls/msvcrt/process.c
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@ -271,52 +271,34 @@ static MSVCRT_wchar_t *msvcrt_argvtos_aw(const char * const *arg, MSVCRT_wchar_t
*/
static MSVCRT_wchar_t *msvcrt_valisttos(const MSVCRT_wchar_t *arg0, va_list alist, MSVCRT_wchar_t delim)
{
va_list alist2;
unsigned long len;
const MSVCRT_wchar_t *arg;
MSVCRT_wchar_t *p, *ret;
unsigned int size = 0, pos = 0;
const MSVCRT_wchar_t *arg;
MSVCRT_wchar_t *new, *ret = NULL;
#ifdef HAVE_VA_COPY
va_copy(alist2,alist);
#else
# ifdef HAVE___VA_COPY
__va_copy(alist2,alist);
# else
alist2 = alist;
# endif
#endif
if (!arg0)
{
/* Return NULL for an empty environment list */
return NULL;
}
/* get length */
arg = arg0;
len = 0;
do {
len += strlenW(arg) + 1;
arg = va_arg(alist, MSVCRT_wchar_t*);
} while (arg != NULL);
ret = MSVCRT_malloc((len + 1) * sizeof(MSVCRT_wchar_t));
if (!ret)
return NULL;
/* fill string */
arg = arg0;
p = ret;
do {
len = strlenW(arg);
memcpy(p, arg, len * sizeof(MSVCRT_wchar_t));
p += len;
*p++ = delim;
arg = va_arg(alist2, MSVCRT_wchar_t*);
} while (arg != NULL);
if (delim && p > ret) p[-1] = 0;
else *p = 0;
return ret;
for (arg = arg0; arg; arg = va_arg( alist, MSVCRT_wchar_t * ))
{
unsigned int len = strlenW( arg ) + 1;
if (pos + len >= size)
{
size = max( 256, size * 2 );
size = max( size, pos + len + 1 );
if (!(new = MSVCRT_realloc( ret, size * sizeof(MSVCRT_wchar_t) )))
{
MSVCRT_free( ret );
return NULL;
}
ret = new;
}
strcpyW( ret + pos, arg );
pos += len;
ret[pos - 1] = delim;
}
if (pos)
{
if (delim) ret[pos - 1] = 0;
else ret[pos] = 0;
}
return ret;
}
/* INTERNAL: Convert ansi va_list to a single 'delim'-separated wide string, with an
@ -324,50 +306,33 @@ static MSVCRT_wchar_t *msvcrt_valisttos(const MSVCRT_wchar_t *arg0, va_list alis
*/
static MSVCRT_wchar_t *msvcrt_valisttos_aw(const char *arg0, va_list alist, MSVCRT_wchar_t delim)
{
va_list alist2;
unsigned long len;
const char *arg;
MSVCRT_wchar_t *p, *ret;
unsigned int size = 0, pos = 0;
const char *arg;
MSVCRT_wchar_t *new, *ret = NULL;
#ifdef HAVE_VA_COPY
va_copy(alist2,alist);
#else
# ifdef HAVE___VA_COPY
__va_copy(alist2,alist);
# else
alist2 = alist;
# endif
#endif
if (!arg0)
{
/* Return NULL for an empty environment list */
return NULL;
}
/* get length */
arg = arg0;
len = 0;
do {
len += MultiByteToWideChar(CP_ACP, 0, arg, -1, NULL, 0);
arg = va_arg(alist, char*);
} while (arg != NULL);
ret = MSVCRT_malloc((len + 1) * sizeof(MSVCRT_wchar_t));
if (!ret)
return NULL;
/* fill string */
arg = arg0;
p = ret;
do {
p += MultiByteToWideChar(CP_ACP, 0, arg, strlen(arg), p, len - (p - ret));
*p++ = delim;
arg = va_arg(alist2, char*);
} while (arg != NULL);
if (delim && p > ret) p[-1] = 0;
else *p = 0;
return ret;
for (arg = arg0; arg; arg = va_arg( alist, char * ))
{
unsigned int len = MultiByteToWideChar( CP_ACP, 0, arg, -1, NULL, 0 );
if (pos + len >= size)
{
size = max( 256, size * 2 );
size = max( size, pos + len + 1 );
if (!(new = MSVCRT_realloc( ret, size * sizeof(MSVCRT_wchar_t) )))
{
MSVCRT_free( ret );
return NULL;
}
ret = new;
}
pos += MultiByteToWideChar( CP_ACP, 0, arg, -1, ret + pos, size - pos );
ret[pos - 1] = delim;
}
if (pos)
{
if (delim) ret[pos - 1] = 0;
else ret[pos] = 0;
}
return ret;
}
/* INTERNAL: retrieve COMSPEC environment variable */