MINOR: stats: add a function to emit fields into a chunk

New function stats_emit_raw_data_field() may be used to write a field
into a chunk. It takes care of the field format to know how to print
it.

diff --git a/src/dumpstats.c b/src/dumpstats.c
index 6947ee63a11aa7de3490cb19445088c521f28bbe..4f21eea938902a982cf2259e6425888ad0259c7d 100644 (file)
--- a/src/dumpstats.c
+++ b/src/dumpstats.c
@@ -2808,6 +2808,22 @@ static void cli_io_handler(struct appctx *appctx)
                si->state, req->flags, res->flags, req->buf->i, req->buf->o, res->buf->i, res->buf->o);
 }
 
+/* Emits a stats field without any surrounding element and properly encoded to
+ * resist CSV output. Returns non-zero on success, 0 if the buffer is full.
+ */
+static int stats_emit_raw_data_field(struct chunk *out, const struct field *f)
+{
+       switch (field_format(f, 0)) {
+       case FF_EMPTY: return 1;
+       case FF_S32:   return chunk_appendf(out, "%d", f->u.s32);
+       case FF_U32:   return chunk_appendf(out, "%u", f->u.u32);
+       case FF_S64:   return chunk_appendf(out, "%lld", (long long)f->u.s64);
+       case FF_U64:   return chunk_appendf(out, "%llu", (unsigned long long)f->u.u64);
+       case FF_STR:   return csv_enc_append(field_str(f, 0), 1, out) != NULL;
+       default:       return chunk_appendf(out, "[INCORRECT_FIELD_TYPE_%08x]", f->type);
+       }
+}
+
 /* This function dumps information onto the stream interface's read buffer.
  * It returns 0 as long as it does not complete, non-zero upon completion.
  * No state is used.