X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/7aa88ac4af764fa92c781056bc23103cadea21a4..5de5db0eb14aa86b5b177050720deb0f4c210fba:/src/common/string.cpp

diff --git a/src/common/string.cpp b/src/common/string.cpp
index e9e906d49b..749a952b34 100644
--- a/src/common/string.cpp
+++ b/src/common/string.cpp
@@ -41,6 +41,12 @@
 #include <string.h>
 #include <stdlib.h>
 
+// This probably isn't right, what should it be Vadim?
+// Otherwise we end up with no wxVsprintf defined.
+#ifdef __WXMOTIF__
+#define HAVE_VPRINTF
+#endif
+
 #ifdef wxUSE_WCSRTOMBS
   #include <wchar.h>    // for wcsrtombs(), see comments where it's used
 #endif // GNU
@@ -78,6 +84,31 @@ static const struct
 // empty C style string: points to 'string data' byte of g_strEmpty
 extern const char *g_szNul = &g_strEmpty.dummy;
 
+// ----------------------------------------------------------------------------
+// conditional compilation
+// ----------------------------------------------------------------------------
+
+// we want to find out if the current platform supports vsnprintf()-like
+// function: for Unix this is done with configure, for Windows we test the
+// compiler explicitly.
+#ifdef __WXMSW__
+    #ifdef _MSC_VER
+        #define wxVsprintf     _vsnprintf
+    #endif
+#else   // !Windows
+    #ifdef HAVE_VSNPRINTF
+        #define wxVsprintf       vsnprintf
+    #endif
+#endif  // Windows/!Windows
+
+#ifndef wxVsprintf
+    // in this case we'll use vsprintf() (which is ANSI and thus should be
+    // always available), but it's unsafe because it doesn't check for buffer
+    // size - so give a warning
+    #define wxVsprintf(buffer,len,format,argptr) vsprintf(buffer,format, argptr)
+    #pragma message("Using sprintf() because no snprintf()-like function defined")
+#endif
+
 // ----------------------------------------------------------------------------
 // global functions
 // ----------------------------------------------------------------------------
@@ -941,9 +972,11 @@ int wxString::PrintfV(const char* pszFormat, va_list argptr)
   // static buffer to avoid dynamic memory allocation each time
   static char s_szScratch[1024];
 
+  // NB: wxVsprintf() may return either less than the buffer size or -1 if there
+  //     is not enough place depending on implementation
   int iLen = wxVsprintf(s_szScratch, WXSIZEOF(s_szScratch), pszFormat, argptr);
   char *buffer;
-  if ( (size_t)iLen < WXSIZEOF(s_szScratch) ) {
+  if ( iLen < (int)WXSIZEOF(s_szScratch) ) {
     buffer = s_szScratch;
   }
   else {