[PATCH v3 2/5] sprinter: add text0 formatter for null character separated text

[Jani Nikula <jani@nikula.org>]

Same as the text formatter, but with each field separated by a null
character rather than a newline character.
---
 sprinter-text.c |   22 ++++++++++++++++++++++
 sprinter.h      |    6 ++++++
 2 files changed, 28 insertions(+)

diff --git a/sprinter-text.c b/sprinter-text.c
index 10343be..7779488 100644
--- a/sprinter-text.c
+++ b/sprinter-text.c
@@ -68,6 +68,14 @@ text_separator (struct sprinter *sp)
 }
 
 static void
+text0_separator (struct sprinter *sp)
+{
+    struct sprinter_text *sptxt = (struct sprinter_text *) sp;
+
+    fputc ('\0', sptxt->stream);
+}
+
+static void
 text_set_prefix (struct sprinter *sp, const char *prefix)
 {
     struct sprinter_text *sptxt = (struct sprinter_text *) sp;
@@ -133,3 +141,17 @@ sprinter_text_create (const void *ctx, FILE *stream)
     res->stream = stream;
     return &res->vtable;
 }
+
+struct sprinter *
+sprinter_text0_create (const void *ctx, FILE *stream)
+{
+    struct sprinter *sp;
+
+    sp = sprinter_text_create (ctx, stream);
+    if (! sp)
+	return NULL;
+
+    sp->separator = text0_separator;
+
+    return sp;
+}
diff --git a/sprinter.h b/sprinter.h
index f43a844..f859672 100644
--- a/sprinter.h
+++ b/sprinter.h
@@ -67,6 +67,12 @@ typedef struct sprinter {
 struct sprinter *
 sprinter_text_create (const void *ctx, FILE *stream);
 
+/* Create a new unstructured printer that emits the text format for
+ * "notmuch search", with each field separated by a null character
+ * instead of the newline character. */
+struct sprinter *
+sprinter_text0_create (const void *ctx, FILE *stream);
+
 /* Create a new structure printer that emits JSON. */
 struct sprinter *
 sprinter_json_create (const void *ctx, FILE *stream);
-- 
1.7.10.4