1 files changed, 96 insertions, 0 deletions
diff --git a/Python/mysnprintf.c b/Python/mysnprintf.c
new file mode 100644
index 0000000000..e6c3fcedc6
--- /dev/null
+++ b/Python/mysnprintf.c
@@ -0,0 +1,96 @@
+
+#include "Python.h"
+
+/* snprintf() emulation for platforms which don't have it (yet). 
+   
+   Return value
+
+       The number of characters printed (not including the trailing
+       `\0' used to end output to strings) or a negative number in
+       case of an error.
+
+       PyOS_snprintf and PyOS_vsnprintf do not write more than size
+       bytes (including the trailing '\0').
+
+       If the output would have been truncated, they return the number
+       of characters (excluding the trailing '\0') which would have
+       been written to the final string if enough space had been
+       available. This is inline with the C99 standard.
+
+*/
+
+#include <ctype.h>
+
+#ifndef HAVE_SNPRINTF
+
+static
+int myvsnprintf(char *str, size_t size, const char  *format, va_list va)
+{
+    char *buffer = PyMem_Malloc(size + 512);
+    int len;
+    
+    if (buffer == NULL)
+	return -1;
+    len = vsprintf(buffer, format, va);
+    if (len < 0) {
+	PyMem_Free(buffer);
+	return len;
+    }
+    len++;
+    if (len > size + 512)
+	Py_FatalError("Buffer overflow in PyOS_snprintf/PyOS_vsnprintf");
+    if (len > size) {
+	PyMem_Free(buffer);
+	return len - 1;
+    }
+    memcpy(str, buffer, len);
+    PyMem_Free(buffer);
+    return len - 1;
+}
+
+int PyOS_snprintf(char *str, size_t size, const  char  *format, ...)
+{
+    int rc;
+    va_list va;
+
+    va_start(va, format);
+    rc = myvsnprintf(str, size, format, va);
+    va_end(va);
+    return rc;
+}
+
+int PyOS_vsnprintf(char *str, size_t size, const char  *format, va_list va)
+{
+    return myvsnprintf(str, size, format, va);
+}
+
+#else
+
+/* Make sure that a C API is included in the lib */
+
+#ifdef PyOS_snprintf
+# undef PyOS_snprintf
+#endif
+
+int PyOS_snprintf(char *str, size_t size, const  char  *format, ...)
+{
+    int rc;
+    va_list va;
+
+    va_start(va, format);
+    rc = vsnprintf(str, size, format, va);
+    va_end(va);
+    return rc;
+}
+
+#ifdef PyOS_vsnprintf
+# undef PyOS_vsnprintf
+#endif
+
+int PyOS_vsnprintf(char *str, size_t size, const char  *format, va_list va)
+{
+    return vsnprintf(str, size, format, va);
+}
+
+#endif
+