Display any possible format sequence when the user provided an invalid one

[simgrid.git] / src / xbt / xbt_log_layout_format.c

diff --git a/src/xbt/xbt_log_layout_format.c b/src/xbt/xbt_log_layout_format.c
index 8aef6f5..9d05e31 100644 (file)
--- a/src/xbt/xbt_log_layout_format.c
+++ b/src/xbt/xbt_log_layout_format.c
@@ -37,6 +37,16 @@ static double begin_of_time = -1;
        precision = -1;                                               \
    } while (0)
 
+#define ERRMSG "Unknown %%%c sequence in layout format (%s).\nKnown sequences:\n"                       \
+       "  what:        %%m: user message  %%c: log category  %%p: log priority\n"                      \
+        "  where:\n"                                                                                    \
+       "    source:    %%F: file          %%L: line          %%M: function  %%l: location (%%F:%%L)\n" \
+       "    runtime:   %%h: hostname      %%t: thread        %%P: process   %%i: PID\n"                \
+       "    backtrace: %%b: full          %%B: short\n"                                                \
+       "  when:        %%d: date          %%r: app. age\n"                                             \
+       "  other:       %%%%: %%             %%n: new line      %%e: plain space\n"
+       
+
 static void xbt_log_layout_format_dynamic(xbt_log_layout_t l,
                                          xbt_log_event_t ev,
                                          const char*fmt,
@@ -144,8 +154,7 @@ static void xbt_log_layout_format_dynamic(xbt_log_layout_t l,
        break;
 
       default:
-       fprintf(stderr,"Unknown %%%c sequence in layout format (%s)\n",
-               *q,(char*)l->data);
+       fprintf(stderr,ERRMSG, *q,(char*)l->data);
        abort();
       }
       q++;
@@ -380,8 +389,7 @@ static void xbt_log_layout_format_doit(xbt_log_layout_t l,
        break;
 
       default:
-       fprintf(stderr,"Unknown %%%c sequence in layout format (%s)\n",
-               *q,(char*)l->data);
+       fprintf(stderr,ERRMSG,*q,(char*)l->data);
        abort();
       }
       q++;