1 files changed, 53 insertions, 0 deletions
diff --git a/subprojects/exess/src/double.c b/subprojects/exess/src/double.c
new file mode 100644
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--- /dev/null
+++ b/subprojects/exess/src/double.c
@@ -0,0 +1,53 @@
+/*
+  Copyright 2019-2021 David Robillard <d@drobilla.net>
+
+  Permission to use, copy, modify, and/or distribute this software for any
+  purpose with or without fee is hereby granted, provided that the above
+  copyright notice and this permission notice appear in all copies.
+
+  THIS SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+  WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+  MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+  ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+  WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+  ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+  OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+*/
+
+#include "decimal.h"
+#include "read_utils.h"
+#include "scientific.h"
+#include "strtod.h"
+#include "write_utils.h"
+
+#include "exess/exess.h"
+
+#include <math.h>
+#include <string.h>
+
+ExessResult
+exess_read_double(double* const out, const char* const str)
+{
+  *out = (double)NAN;
+
+  const size_t       i  = skip_whitespace(str);
+  ExessDecimalDouble in = {EXESS_NAN, 0u, 0, {0}};
+  const ExessResult  r  = parse_double(&in, str + i);
+
+  if (!r.status) {
+    *out = parsed_double_to_double(in);
+  }
+
+  return result(r.status, i + r.count);
+}
+
+ExessResult
+exess_write_double(const double value, const size_t buf_size, char* const buf)
+{
+  const ExessDecimalDouble decimal = exess_measure_double(value);
+  const ExessResult        r =
+    buf ? exess_write_scientific(decimal, buf_size, buf)
+               : result(EXESS_SUCCESS, exess_scientific_string_length(decimal));
+
+  return end_write(r.status, buf_size, buf, r.count);
+}