* make some more functions NULL safe

diff --git a/libcitadel/lib/stringbuf.c b/libcitadel/lib/stringbuf.c
index 816c196e601de11d203baa381aaab902e4ec01e7..d348fac6491b985f67b532331f7cc2e9baa3f0e6 100644 (file)
--- a/libcitadel/lib/stringbuf.c
+++ b/libcitadel/lib/stringbuf.c
@@ -1055,10 +1055,18 @@ int StrBufSub(StrBuf *dest, const StrBuf *Source, unsigned long Offset, size_t n
 void StrBufVAppendPrintf(StrBuf *Buf, const char *format, va_list ap)
 {
        va_list apl;
-       size_t BufSize = Buf->BufSize;
-       size_t nWritten = Buf->BufSize + 1;
-       size_t Offset = Buf->BufUsed;
-       size_t newused = Offset + nWritten;
+       size_t BufSize;
+       size_t nWritten;
+       size_t Offset;
+       size_t newused;
+
+       if ((Buf == NULL)  || (format == NULL))
+               return;
+
+       BufSize = Buf->BufSize;
+       nWritten = Buf->BufSize + 1;
+       Offset = Buf->BufUsed;
+       newused = Offset + nWritten;
        
        while (newused >= BufSize) {
                va_copy(apl, ap);
@@ -1087,12 +1095,20 @@ void StrBufVAppendPrintf(StrBuf *Buf, const char *format, va_list ap)
  */
 void StrBufAppendPrintf(StrBuf *Buf, const char *format, ...)
 {
-       size_t BufSize = Buf->BufSize;
-       size_t nWritten = Buf->BufSize + 1;
-       size_t Offset = Buf->BufUsed;
-       size_t newused = Offset + nWritten;
+       size_t BufSize;
+       size_t nWritten;
+       size_t Offset;
+       size_t newused;
        va_list arg_ptr;
        
+       if ((Buf == NULL)  || (format == NULL))
+               return;
+
+       BufSize = Buf->BufSize;
+       nWritten = Buf->BufSize + 1;
+       Offset = Buf->BufUsed;
+       newused = Offset + nWritten;
+
        while (newused >= BufSize) {
                va_start(arg_ptr, format);
                nWritten = vsnprintf(Buf->buf + Buf->BufUsed, 
@@ -1120,9 +1136,13 @@ void StrBufAppendPrintf(StrBuf *Buf, const char *format, ...)
  */
 void StrBufPrintf(StrBuf *Buf, const char *format, ...)
 {
-       size_t nWritten = Buf->BufSize + 1;
+       size_t nWritten;
        va_list arg_ptr;
        
+       if ((Buf == NULL)  || (format == NULL))
+               return;
+
+       nWritten = Buf->BufSize + 1;
        while (nWritten >= Buf->BufSize) {
                va_start(arg_ptr, format);
                nWritten = vsnprintf(Buf->buf, Buf->BufSize, format, arg_ptr);