internals: __ntapi_log_write(): initial implementation.

2 files changed, 67 insertions, 0 deletions

diff --git a/project/headers.mk b/project/headers.mk
index 09b3e7c..84db879 100644
--- a/project/headers.mk
+++ b/project/headers.mk
@@ -69,6 +69,7 @@ INTERNAL_HEADERS = \
 	$(PROJECT_DIR)/src/internal/./ntapi_fnapi.h \
 	$(PROJECT_DIR)/src/internal/./ntapi_hash_table.h \
 	$(PROJECT_DIR)/src/internal/./ntapi_impl.h \
+	$(PROJECT_DIR)/src/internal/./ntapi_log.h \
 	$(PROJECT_DIR)/src/internal/./ntapi_pty.h \
 
 ALL_HEADERS = $(API_HEADERS) $(INTERNAL_HEADERS) \
diff --git a/src/internal/ntapi_log.h b/src/internal/ntapi_log.h
new file mode 100644
index 0000000..108bc18
--- /dev/null
+++ b/src/internal/ntapi_log.h
@@ -0,0 +1,66 @@
+/********************************************************/
+/*  ntapi: Native API core library                      */
+/*  Copyright (C) 2013--2016  Z. Gilboa                 */
+/*  Released under GPLv2 and GPLv3; see COPYING.NTAPI.  */
+/********************************************************/
+
+#include <psxtypes/psxtypes.h>
+#include <ntapi/nt_file.h>
+#include <ntapi/ntapi.h>
+#include "ntapi_impl.h"
+
+static inline int __ntapi_uintptr_to_utf8(uintptr_t value,unsigned char * buf)
+{
+	int i,len;
+	uintptr_t val;
+
+	if (!value) {
+		*buf = '0';
+		len = 1;
+	} else {
+		for (len=0,val=value; val; val=val/10,len++);
+		for (i=len,buf+=len-1; i; i--,buf--,value=value/10)
+			*buf = '0' + (value % 10);
+	}
+
+	return len;
+}
+
+static inline ssize_t __ntapi_log_write(void * msg,uint32_t size)
+{
+	int32_t		status;
+	void *		hlog;
+	nt_iosb		iosb;
+	uintptr_t	buffer[8] = {0};
+	char *		ch = (char *)buffer;
+
+	if (!(hlog = __ntapi_internals()->rtdata->hlog))
+		return NT_STATUS_INVALID_HANDLE;
+
+	*ch++ = '@';
+	ch   += __ntapi_uintptr_to_utf8(
+			pe_get_current_process_id(),
+			ch);
+	*ch++ = ':';
+	ch   += __ntapi_uintptr_to_utf8(
+			pe_get_current_thread_id(),
+			ch);
+	*ch++ = '@';
+	*ch++ = ' ';
+
+	__ntapi->zw_write_file(
+		hlog,
+		0,0,0,&iosb,
+		buffer,
+		(uint32_t)(ch-(char *)buffer),
+		0,0);
+
+	status = __ntapi->zw_write_file(
+		hlog,
+		0,0,0,&iosb,
+		msg,
+		(uint32_t)size,
+		0,0);
+
+	return status ? -1 : iosb.info;
+}