do not segfault if make_cache_entry failed

diff --git a/graph.c b/graph.c
index e2633f8376eb7b12706dcd4c698e2b3f6be2b433..5f821706c63778e8b6b53a10894edfc2fb21a8b0 100644 (file)
--- a/graph.c
+++ b/graph.c
@@ -4,6 +4,43 @@
 #include "diff.h"
 #include "revision.h"
 
+/* Internal API */
+
+/*
+ * Output the next line for a graph.
+ * This formats the next graph line into the specified strbuf.  It is not
+ * terminated with a newline.
+ *
+ * Returns 1 if the line includes the current commit, and 0 otherwise.
+ * graph_next_line() will return 1 exactly once for each time
+ * graph_update() is called.
+ */
+static int graph_next_line(struct git_graph *graph, struct strbuf *sb);
+
+/*
+ * Output a padding line in the graph.
+ * This is similar to graph_next_line().  However, it is guaranteed to
+ * never print the current commit line.  Instead, if the commit line is
+ * next, it will simply output a line of vertical padding, extending the
+ * branch lines downwards, but leaving them otherwise unchanged.
+ */
+static void graph_padding_line(struct git_graph *graph, struct strbuf *sb);
+
+/*
+ * Print a strbuf to stdout.  If the graph is non-NULL, all lines but the
+ * first will be prefixed with the graph output.
+ *
+ * If the strbuf ends with a newline, the output will end after this
+ * newline.  A new graph line will not be printed after the final newline.
+ * If the strbuf is empty, no output will be printed.
+ *
+ * Since the first line will not include the graph ouput, the caller is
+ * responsible for printing this line's graph (perhaps via
+ * graph_show_commit() or graph_show_oneline()) before calling
+ * graph_show_strbuf().
+ */
+static void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb);
+
 /*
  * TODO:
  * - Add colors to the graph.
@@ -180,14 +217,6 @@ struct git_graph *graph_init(struct rev_info *opt)
        return graph;
 }
 
-void graph_release(struct git_graph *graph)
-{
-       free(graph->columns);
-       free(graph->new_columns);
-       free(graph->mapping);
-       free(graph);
-}
-
 static void graph_update_state(struct git_graph *graph, enum graph_state s)
 {
        graph->prev_state = graph->state;
@@ -685,7 +714,7 @@ static void graph_output_commit_char(struct git_graph *graph, struct strbuf *sb)
        strbuf_addch(sb, '*');
 }
 
-void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb)
+static void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb)
 {
        int seen_this = 0;
        int i, j;
@@ -760,7 +789,7 @@ void graph_output_commit_line(struct git_graph *graph, struct strbuf *sb)
                graph_update_state(graph, GRAPH_COLLAPSING);
 }
 
-void graph_output_post_merge_line(struct git_graph *graph, struct strbuf *sb)
+static void graph_output_post_merge_line(struct git_graph *graph, struct strbuf *sb)
 {
        int seen_this = 0;
        int i, j;
@@ -801,7 +830,7 @@ void graph_output_post_merge_line(struct git_graph *graph, struct strbuf *sb)
                graph_update_state(graph, GRAPH_COLLAPSING);
 }
 
-void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb)
+static void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb)
 {
        int i;
        int *tmp_mapping;
@@ -906,7 +935,7 @@ void graph_output_collapsing_line(struct git_graph *graph, struct strbuf *sb)
                graph_update_state(graph, GRAPH_PADDING);
 }
 
-int graph_next_line(struct git_graph *graph, struct strbuf *sb)
+static int graph_next_line(struct git_graph *graph, struct strbuf *sb)
 {
        switch (graph->state) {
        case GRAPH_PADDING:
@@ -933,7 +962,7 @@ int graph_next_line(struct git_graph *graph, struct strbuf *sb)
        return 0;
 }
 
-void graph_padding_line(struct git_graph *graph, struct strbuf *sb)
+static void graph_padding_line(struct git_graph *graph, struct strbuf *sb)
 {
        int i, j;
 
@@ -1055,7 +1084,7 @@ int graph_show_remainder(struct git_graph *graph)
 }
 
 
-void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb)
+static void graph_show_strbuf(struct git_graph *graph, struct strbuf const *sb)
 {
        char *p;