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-rw-r--r--edify/expr.c13
-rw-r--r--edify/expr.h4
2 files changed, 17 insertions, 0 deletions
diff --git a/edify/expr.c b/edify/expr.c
index f1c555552..72e5100f3 100644
--- a/edify/expr.c
+++ b/edify/expr.c
@@ -417,3 +417,16 @@ char** ReadVarArgs(State* state, int argc, Expr* argv[]) {
}
return args;
}
+
+// Use printf-style arguments to compose an error message to put into
+// *state. Returns NULL.
+char* ErrorAbort(State* state, char* format, ...) {
+ char* buffer = malloc(4096);
+ va_list v;
+ va_start(v, format);
+ vsnprintf(buffer, 4096, format, v);
+ va_end(v);
+ free(state->errmsg);
+ state->errmsg = buffer;
+ return NULL;
+}
diff --git a/edify/expr.h b/edify/expr.h
index 671b499b5..d2e739201 100644
--- a/edify/expr.h
+++ b/edify/expr.h
@@ -118,5 +118,9 @@ int ReadArgs(State* state, Expr* argv[], int count, ...);
// strings it contains.
char** ReadVarArgs(State* state, int argc, Expr* argv[]);
+// Use printf-style arguments to compose an error message to put into
+// *state. Returns NULL.
+char* ErrorAbort(State* state, char* format, ...);
+
#endif // _EXPRESSION_H