Fix bug in DFS edge traversal;

add post and prepost variants to DFS traversals.

diff --git a/cmd/gvpr/actions.c b/cmd/gvpr/actions.c
index 2a6579106143876646f9dc832d20f7da8ed7d634..c190561e7a979f666b64df275a03a97c5e2e2fa8 100644 (file)
--- a/cmd/gvpr/actions.c
+++ b/cmd/gvpr/actions.c
@@ -521,12 +521,12 @@ int writeFile(Agraph_t * g, char *f)
     Sfio_t *fp;
 
     if (!f) {
-       error(1, "NULL string passed to writeG");
+       error(ERROR_FATAL, "NULL string passed to writeG");
        return 1;
     }
     fp = sfopen(0, f, "w");
     if (!fp) {
-       error(1, "Could not open %s for writing in writeG", f);
+       error(ERROR_FATAL, "Could not open %s for writing in writeG", f);
        return 1;
     }
     rv = agwrite(g, fp);
@@ -544,12 +544,12 @@ Agraph_t *readFile(char *f)
     Sfio_t *fp;
 
     if (!f) {
-       error(1, "NULL string passed to readG");
+       error(ERROR_FATAL, "NULL string passed to readG");
        return 0;
     }
     fp = sfopen(0, f, "r");
     if (!fp) {
-       error(1, "Could not open %s for reading in readG", f);
+       error(ERROR_FATAL, "Could not open %s for reading in readG", f);
        return 0;
     }
     gp = readG(fp);
@@ -591,7 +591,7 @@ int openFile(Expr_t * ex, char *fname, char *mode)
        if (!ex->file[idx])
            break;
     if (idx == elementsof(ex->file)) {
-       error(1, "openF: no available descriptors");
+       error(ERROR_FATAL, "openF: no available descriptors");
        return -1;
     }
     ex->file[idx] = sfopen(0, fname, mode);
@@ -606,11 +606,11 @@ int closeFile(Expr_t * ex, int fd)
     int rv;
 
     if ((0 <= fd) && (fd <= 2)) {
-       error(1, "closeF: cannot close standard stream %d", fd);
+       error(ERROR_FATAL, "closeF: cannot close standard stream %d", fd);
        return -1;
     }
     if (!ex->file[fd]) {
-       error(1, "closeF: stream %d not open", fd);
+       error(ERROR_FATAL, "closeF: stream %d not open", fd);
        return -1;
     }
     rv = sfclose(ex->file[fd]);