Add _cbprintf/_vcbprintf (callback based printf formatters)

[pdclib] / functions / stdio / _cbprintf.c

diff --git a/functions/stdio/_cbprintf.c b/functions/stdio/_cbprintf.c
new file mode 100644 (file)
index 0000000..c0192fe
--- /dev/null
+++ b/functions/stdio/_cbprintf.c
@@ -0,0 +1,56 @@
+/* _cbprintf( void *, size_t (*)( void*, const char *, size_t ), const char *, ... )
+
+   This file is part of the Public Domain C Library (PDCLib).
+   Permission is granted to use, modify, and / or redistribute at will.
+*/
+
+#include <stdio.h>
+#include <stdint.h>
+#include <stdarg.h>
+
+#ifndef REGTEST
+
+int _cbprintf(
+    void * p,
+    size_t (*cb)( void*, const char*, size_t ),
+    const char * _PDCLIB_restrict format,
+    ...)
+{
+    int rc;
+    va_list ap;
+    va_start( ap, format );
+    rc = _vcbprintf( p, cb, format, ap );
+    va_end( ap );
+    return rc;
+}
+
+#endif
+
+#ifdef TEST
+#define _PDCLIB_FILEID "stdio/sprintf.c"
+#define _PDCLIB_STRINGIO
+#include <stddef.h>
+
+#include <_PDCLIB_test.h>
+
+static char * bufptr;
+static size_t testcb( void *p, const char *buf, size_t size )
+{
+    memcpy(bufptr, buf, size);
+    bufptr += size;
+    *bufptr = '\0';
+    return size;
+}
+
+#define testprintf( s, ... ) _cbprintf( bufptr = s, testcb, __VA_ARGS__ )
+
+int main( void )
+{
+    char target[100];
+#ifndef REGTEST
+#include "printf_testcases.h"
+#endif
+    return TEST_RESULTS;
+}
+
+#endif