1 files changed, 98 insertions, 0 deletions
diff --git a/src/log.cpp b/src/log.cpp
new file mode 100644
index 00000000..0f81dc13
--- /dev/null
+++ b/src/log.cpp
@@ -0,0 +1,98 @@
+/******************************************************************************
+ * Project:  PROJ.4
+ * Purpose:  Implementation of pj_log() function.
+ * Author:   Frank Warmerdam, warmerdam@pobox.com
+ *
+ ******************************************************************************
+ * Copyright (c) 2010, Frank Warmerdam
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included
+ * in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+ * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *****************************************************************************/
+
+#include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "proj.h"
+#include "projects.h"
+
+/************************************************************************/
+/*                          pj_stderr_logger()                          */
+/************************************************************************/
+
+void pj_stderr_logger( void *app_data, int level, const char *msg )
+
+{
+    (void) app_data;
+    (void) level;
+    fprintf( stderr, "%s\n", msg );
+}
+
+/************************************************************************/
+/*                               pj_vlog()                              */
+/************************************************************************/
+void pj_vlog( projCtx ctx, int level, const char *fmt, va_list args );
+/* Workhorse for the log functions - relates to pj_log as vsprintf relates to sprintf */
+void pj_vlog( projCtx ctx, int level, const char *fmt, va_list args )
+
+{
+    char *msg_buf;
+    int debug_level = ctx->debug_level;
+    int shutup_unless_errno_set = debug_level < 0;
+
+    /* For negative debug levels, we first start logging when errno is set */
+    if (ctx->last_errno==0 && shutup_unless_errno_set)
+        return;
+
+    if (debug_level < 0)
+        debug_level = -debug_level;
+
+    if( level > debug_level )
+        return;
+
+    msg_buf = (char *) malloc(100000);
+    if( msg_buf == nullptr )
+        return;
+
+    /* we should use vsnprintf where available once we add configure detect.*/
+    vsprintf( msg_buf, fmt, args );
+
+    ctx->logger( ctx->app_data, level, msg_buf );
+
+    free( msg_buf );
+}
+
+
+/************************************************************************/
+/*                               pj_log()                               */
+/************************************************************************/
+
+void pj_log( projCtx ctx, int level, const char *fmt, ... )
+
+{
+    va_list args;
+
+    if( level > ctx->debug_level )
+        return;
+
+    va_start( args, fmt );
+    pj_vlog( ctx, level, fmt, args );
+    va_end( args );
+}