First draft of AGG plot modules. The old one based on GNU libplot is removed. - gsl-shell.git - gsl-shell

diff --git a/agg-plot/string_printf.cpp b/agg-plot/string_printf.cpp
new file mode 100644
index 00000000..884550bd
--- /dev/null
+++ b/agg-plot/string_printf.cpp

@@ -0,0 +1,24 @@

+

+#include <string>

+#include <stdarg.h>

+

+void

+string_printf (std::string &s, const char *fmt, ...)

+{

+ va_list ap;

+ char *buf;

+ int n;

+

+ va_start (ap, fmt);

+

+ n = vasprintf (&buf, fmt, ap);

+ if (n <= 0)

+ {

+ s = "";

+ return;

+ }

+

+ s = (const char *) buf;

+ free (buf);

+ va_end (ap);

+}