1 files changed, 85 insertions, 0 deletions
diff --git a/subprojects/exess/src/write_utils.h b/subprojects/exess/src/write_utils.h
new file mode 100644
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--- /dev/null
+++ b/subprojects/exess/src/write_utils.h
@@ -0,0 +1,85 @@
+/*
+  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.
+*/
+
+#ifndef EXESS_WRITE_UTILS_H
+#define EXESS_WRITE_UTILS_H
+
+#include "exess/exess.h"
+
+#include <stddef.h>
+#include <stdint.h>
+#include <string.h>
+
+static inline size_t
+write_char(const char c, size_t buf_size, char* const buf, const size_t i)
+{
+  if (buf && buf_size >= i + 1) {
+    buf[i] = c;
+  }
+
+  return 1;
+}
+
+static inline size_t
+write_string(const size_t len,
+             const char*  str,
+             const size_t buf_size,
+             char* const  buf,
+             const size_t i)
+{
+  if (buf && buf_size >= i + len + 1) {
+    memcpy(buf + i, str, len);
+    buf[i + len] = 0;
+  }
+
+  return len;
+}
+
+static inline ExessResult
+end_write(const ExessStatus status,
+          const size_t      buf_size,
+          char* const       buf,
+          const size_t      i)
+{
+  ExessResult r = {status, status > EXESS_EXPECTED_END ? 0 : i};
+
+  if (buf) {
+    if (!status && i >= buf_size) {
+      r.status = EXESS_NO_SPACE;
+      r.count  = 0;
+    }
+
+    if (r.count < buf_size) {
+      buf[r.count] = '\0';
+    }
+  }
+
+  return r;
+}
+
+ExessResult
+write_digits(uint64_t value, size_t buf_size, char* buf, size_t i);
+
+size_t
+write_two_digit_number(uint8_t value, size_t buf_size, char* buf, size_t i);
+
+ExessResult
+write_special(size_t      string_length,
+              const char* string,
+              size_t      buf_size,
+              char*       buf);
+
+#endif // EXESS_WRITE_UTILS_H