X-Git-Url: http://git.iain.cx/?a=blobdiff_plain;f=event.cpp;h=32e4acff856e5cd9af29f02d9175c4fd63ba0ddb;hb=470de9224d9473853d24006d7ae13eba818ecf0f;hp=661761dac8d3ef74aed441a0e313d06118bc6660;hpb=4440946eccf1cb14e16f8d29c54fb4acecbd44ff;p=nssm.git

diff --git a/event.cpp b/event.cpp
index 661761d..32e4acf 100644
--- a/event.cpp
+++ b/event.cpp
@@ -1,11 +1,41 @@
 #include "nssm.h"
 
+#define NSSM_ERROR_BUFSIZE 65535
+#define NSSM_NUM_EVENT_STRINGS 16
+unsigned long tls_index;
+
+/* Convert error code to error string - must call LocalFree() on return value */
+char *error_string(unsigned long error) {
+  /* Thread-safe buffer */
+  char *error_message = (char *) TlsGetValue(tls_index);
+  if (! error_message) {
+    error_message = (char *) LocalAlloc(LPTR, NSSM_ERROR_BUFSIZE);
+    if (! error_message) return "<out of memory for error message>";
+    TlsSetValue(tls_index, (void *) error_message);
+  }
+
+  if (! FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS, 0, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (char *) error_message, NSSM_ERROR_BUFSIZE, 0)) {
+    if (_snprintf_s(error_message, NSSM_ERROR_BUFSIZE, _TRUNCATE, "system error %lu", error) < 0) return 0;
+  }
+  return error_message;
+}
+
+/* Convert message code to format string */
+char *message_string(unsigned long error) {
+  char *ret;
+  if (! FormatMessage(FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_HMODULE | FORMAT_MESSAGE_IGNORE_INSERTS, 0, error, MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), (LPSTR) &ret, NSSM_ERROR_BUFSIZE, 0)) {
+    ret = (char *) HeapAlloc(GetProcessHeap(), 0, 32);
+    if (_snprintf_s(ret, NSSM_ERROR_BUFSIZE, _TRUNCATE, "system error %lu", error) < 0) return 0;
+  }
+  return ret;
+}
+
 /* Log a message to the Event Log */
 void log_event(unsigned short type, unsigned long id, ...) {
   va_list arg;
   int count;
   char *s;
-  char *strings[6];
+  char *strings[NSSM_NUM_EVENT_STRINGS];
 
   /* Open event log */
   HANDLE handle = RegisterEventSource(0, TEXT(NSSM));
@@ -14,10 +44,50 @@ void log_event(unsigned short type, unsigned long id, ...) {
   /* Log it */
   count = 0;
   va_start(arg, id);
-  while ((s = va_arg(arg, char *))) strings[count++] = s;
+  while ((s = va_arg(arg, char *)) && count < NSSM_NUM_EVENT_STRINGS - 1) strings[count++] = s;
+  strings[count] = 0;
   va_end(arg);
   ReportEvent(handle, type, 0, id, 0, count, 0, (const char **) strings, 0);
 
   /* Close event log */
   DeregisterEventSource(handle);
 }
+
+/* Log a message to the console */
+void print_message(FILE *file, unsigned long id, ...) {
+  va_list arg;
+
+  char *format = message_string(id);
+  if (! format) return;
+
+  va_start(arg, id);
+  vfprintf(file, format, arg);
+  va_end(arg);
+
+  LocalFree(format);
+}
+
+/* Show a GUI dialogue */
+int popup_message(unsigned int type, unsigned long id, ...) {
+  va_list arg;
+
+  char *format = message_string(id);
+  if (! format) {
+    return MessageBox(0, "Message %lu was supposed to go here!", NSSM, MB_OK | MB_ICONEXCLAMATION);
+  }
+
+  char blurb[256];
+  va_start(arg, id);
+  if (vsnprintf_s(blurb, sizeof(blurb), _TRUNCATE, format, arg) < 0) {
+    va_end(arg);
+    LocalFree(format);
+    return MessageBox(0, "Message %lu was supposed to go here!", NSSM, MB_OK | MB_ICONEXCLAMATION);
+  }
+  va_end(arg);
+
+  int ret = MessageBox(0, blurb, NSSM, type);
+
+  LocalFree(format);
+
+  return ret;
+}