Directory Structure [step 1]: moving files

working on #672

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deps/g3dlite/source/format.cpp

@@ -0,0 +1,164 @@
+/**
+ @file format.cpp
+
+ @author Morgan McGuire, graphics3d.com
+
+ @created 2000-09-09
+ @edited  2006-08-14
+*/
+
+#include "G3D/format.h"
+#include "G3D/platform.h"
+#include "G3D/System.h"
+
+#ifdef _MSC_VER
+    // disable: "C++ exception handler used"
+#   pragma warning (push)
+#   pragma warning (disable : 4530)
+#endif // _MSC_VER
+
+// If your platform does not have vsnprintf, you can find a
+// implementation at http://www.ijs.si/software/snprintf/
+
+namespace G3D {
+
+std::string __cdecl format(const char* fmt,...) {
+    va_list argList;
+    va_start(argList,fmt);
+    std::string result = vformat(fmt, argList);
+    va_end(argList);
+
+    return result;
+}
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1300)
+// Both MSVC seems to use the non-standard vsnprintf
+// so we are using vscprintf to determine buffer size, however
+// only MSVC7 and up headers include vscprintf for some reason.
+std::string vformat(const char *fmt, va_list argPtr) {
+    // We draw the line at a 1MB string.
+    const int maxSize = 1000000;
+
+    // If the string is less than 161 characters,
+    // allocate it on the stack because this saves
+    // the malloc/free time.
+    const int bufSize = 161;
+	char stackBuffer[bufSize];
+
+    // MSVC does not support va_copy
+    int actualSize = _vscprintf(fmt, argPtr) + 1;
+
+    if (actualSize > bufSize) {
+
+        // Now use the heap.
+        char* heapBuffer = NULL;
+
+        if (actualSize < maxSize) {
+
+            heapBuffer = (char*)System::malloc(maxSize + 1);
+            _vsnprintf(heapBuffer, maxSize, fmt, argPtr);
+            heapBuffer[maxSize] = '\0';
+        } else {
+            heapBuffer = (char*)System::malloc(actualSize);
+            vsprintf(heapBuffer, fmt, argPtr);            
+        }
+
+        std::string formattedString(heapBuffer);
+        System::free(heapBuffer);
+        return formattedString;
+    } else {
+
+        vsprintf(stackBuffer, fmt, argPtr);
+        return std::string(stackBuffer);
+    }
+}
+
+#elif defined(_MSC_VER) && (_MSC_VER < 1300)
+
+std::string vformat(const char *fmt, va_list argPtr) {
+    // We draw the line at a 1MB string.
+    const int maxSize = 1000000;
+
+    // If the string is less than 161 characters,
+    // allocate it on the stack because this saves
+    // the malloc/free time.
+    const int bufSize = 161;
+	char stackBuffer[bufSize];
+
+	// MSVC6 doesn't support va_copy, however it also seems to compile
+	// correctly if we just pass our argument list along.  Note that 
+	// this whole code block is only compiled if we're on MSVC6 anyway
+	int actualWritten = _vsnprintf(stackBuffer, bufSize, fmt, argPtr);
+
+    // Not a big enough buffer, bufSize characters written
+    if (actualWritten == -1) {
+
+        int heapSize = 512;
+        double powSize = 1.0;
+        char* heapBuffer = (char*)System::malloc(heapSize);
+        
+        while ((_vsnprintf(heapBuffer, heapSize, fmt, argPtr) == -1) &&
+            (heapSize  < maxSize)) {
+
+            heapSize = iCeil(heapSize * ::pow((double)2.0, powSize++));
+            heapBuffer = (char*)System::realloc(heapBuffer, heapSize);
+        }
+
+        heapBuffer[heapSize-1] = '\0';
+
+        std::string heapString(heapBuffer);
+        System::free(heapBuffer);
+
+        return heapString;
+    } else {
+
+        return std::string(stackBuffer);
+    }
+}
+
+#else
+
+// glibc 2.1 has been updated to the C99 standard
+std::string vformat(const char* fmt, va_list argPtr) {
+    // If the string is less than 161 characters,
+    // allocate it on the stack because this saves
+    // the malloc/free time.  The number 161 is chosen
+    // to support two lines of text on an 80 character
+    // console (plus the null terminator).
+    const int bufSize = 161;
+    char stackBuffer[bufSize];
+
+    va_list argPtrCopy;
+    va_copy(argPtrCopy, argPtr);
+    int numChars = vsnprintf(stackBuffer, bufSize, fmt, argPtrCopy);
+    va_end(argPtrCopy);
+
+    if (numChars >= bufSize) {
+      // We didn't allocate a big enough string.
+      char* heapBuffer = (char*)System::malloc((numChars + 1) * sizeof(char));
+
+      debugAssert(heapBuffer);
+      int numChars2 = vsnprintf(heapBuffer, numChars + 1, fmt, argPtr);
+      debugAssert(numChars2 == numChars);
+      (void)numChars2;
+
+      std::string result(heapBuffer);
+      
+      System::free(heapBuffer);
+
+      return result;
+
+    } else {
+
+      return std::string(stackBuffer);
+
+    }
+}
+
+#endif
+
+} // namespace
+
+#ifdef _MSC_VER
+#   pragma warning (pop)
+#endif