1 files changed, 180 insertions, 0 deletions
diff --git a/subprojects/exess/test/test_hex.c b/subprojects/exess/test/test_hex.c
new file mode 100644
index 00000000..5ceec90b
--- /dev/null
+++ b/subprojects/exess/test/test_hex.c
@@ -0,0 +1,180 @@
+/*
+  Copyright 2011-2021 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.
+*/
+
+#undef NDEBUG
+
+#include "exess/exess.h"
+
+#include <assert.h>
+#include <stddef.h>
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+
+static void
+check_read(const char* const string,
+           const ExessStatus expected_status,
+           const size_t      expected_value_length,
+           const char* const expected_value,
+           const size_t      expected_value_size,
+           const size_t      expected_count)
+{
+  char      buf[9] = {0, 0, 0, 0, 0, 0, 0, 0, 0};
+  ExessBlob blob   = {sizeof(buf), buf};
+
+  ExessResult r = exess_read_hex(&blob, string);
+  assert(r.status == expected_status);
+  assert(r.count == expected_count);
+  assert(r.status || blob.size == expected_value_size);
+  if (expected_value_length > 0) {
+    assert(!strncmp(buf, expected_value, expected_value_length));
+    assert(blob.size <= exess_hex_decoded_size(strlen(string)));
+  }
+}
+
+static void
+test_lowercase(void)
+{
+  char      buf[6] = {0, 0, 0, 0, 0, 0};
+  ExessBlob blob   = {sizeof(buf), buf};
+
+  ExessResult r = exess_read_hex(&blob, "6A6B6C6D6E6F");
+  assert(r.status == EXESS_SUCCESS);
+  assert(r.count == 12);
+  assert(blob.size == 6);
+  assert(!strncmp((const char*)blob.data, "jklmno", 6));
+
+  r = exess_read_hex(&blob, "6a6b6c6d6e6f");
+  assert(r.status == EXESS_SUCCESS);
+  assert(r.count == 12);
+  assert(blob.size == 6);
+  assert(!strncmp((const char*)blob.data, "jklmno", 6));
+}
+
+static void
+test_whitespace(void)
+{
+  check_read("666F6F", EXESS_SUCCESS, 3, "foo", 3, 6);
+  check_read(" 666F6F", EXESS_SUCCESS, 3, "foo", 3, 7);
+  check_read("6\f66F6F", EXESS_SUCCESS, 3, "foo", 3, 7);
+  check_read("66\n6F6F", EXESS_SUCCESS, 3, "foo", 3, 7);
+  check_read("666\rF6F", EXESS_SUCCESS, 3, "foo", 3, 7);
+  check_read("666F\t6F", EXESS_SUCCESS, 3, "foo", 3, 7);
+  check_read(" \f\n\r\t\v666F6F", EXESS_SUCCESS, 3, "foo", 3, 12);
+  check_read("666F6F \f\n\r\t\v", EXESS_SUCCESS, 3, "foo", 3, 12);
+}
+
+static void
+test_syntax_errors(void)
+{
+  check_read("G6", EXESS_EXPECTED_HEX, 0, NULL, 0, 1);
+  check_read("g6", EXESS_EXPECTED_HEX, 0, NULL, 0, 1);
+  check_read("!6", EXESS_EXPECTED_HEX, 0, NULL, 0, 1);
+  check_read("^6", EXESS_EXPECTED_HEX, 0, NULL, 0, 1);
+  check_read("6G", EXESS_EXPECTED_HEX, 0, NULL, 0, 2);
+  check_read("6g", EXESS_EXPECTED_HEX, 0, NULL, 0, 2);
+  check_read("6!", EXESS_EXPECTED_HEX, 0, NULL, 0, 2);
+  check_read("6^", EXESS_EXPECTED_HEX, 0, NULL, 0, 2);
+  check_read("6", EXESS_EXPECTED_HEX, 0, NULL, 0, 1);
+  check_read("66G6", EXESS_EXPECTED_HEX, 0, NULL, 1, 3);
+  check_read("66 G6", EXESS_EXPECTED_HEX, 0, NULL, 1, 4);
+}
+
+static void
+test_read_overflow(void)
+{
+  char      buf[9] = {0, 0, 0, 0, 0, 0, 0, 0, 0};
+  ExessBlob blob0  = {0, buf};
+  ExessBlob blob1  = {1, buf};
+  ExessBlob blob2  = {2, buf};
+
+  ExessResult r = exess_read_hex(&blob0, "666F6F");
+  assert(r.status == EXESS_NO_SPACE);
+  assert(r.count == 2);
+  assert(blob0.size == 0);
+
+  r = exess_read_hex(&blob1, "666F6F");
+  assert(r.status == EXESS_NO_SPACE);
+  assert(r.count == 4);
+  assert(blob1.size == 1);
+
+  r = exess_read_hex(&blob2, "666F6F");
+  assert(r.status == EXESS_NO_SPACE);
+  assert(r.count == 6);
+  assert(blob2.size == 2);
+}
+
+static void
+test_write_overflow(void)
+{
+  char buf[7] = {1, 2, 3, 4, 5, 6, 7};
+
+  assert(exess_write_hex(3, "foo", 0, buf).status == EXESS_NO_SPACE);
+  assert(exess_write_hex(3, "foo", 1, buf).status == EXESS_NO_SPACE);
+  assert(exess_write_hex(3, "foo", 2, buf).status == EXESS_NO_SPACE);
+  assert(exess_write_hex(3, "foo", 3, buf).status == EXESS_NO_SPACE);
+  assert(exess_write_hex(3, "foo", 4, buf).status == EXESS_NO_SPACE);
+  assert(exess_write_hex(3, "foo", 5, buf).status == EXESS_NO_SPACE);
+  assert(exess_write_hex(3, "foo", 6, buf).status == EXESS_NO_SPACE);
+  assert(exess_write_hex(3, "foo", 7, buf).status == EXESS_SUCCESS);
+}
+
+static void
+test_round_trip(void)
+{
+  for (size_t size = 1; size < 256; ++size) {
+    // Allocate and generate data
+    uint8_t* const data = (uint8_t*)malloc(size);
+    for (size_t i = 0; i < size; ++i) {
+      data[i] = (uint8_t)((size + i) % 256);
+    }
+
+    // Allocate buffer for encoding with minimum required size
+    const size_t str_len = exess_write_hex(size, data, 0, NULL).count;
+    char* const  str     = (char*)malloc(str_len + 1);
+
+    // Encode data to string buffer
+    assert(!exess_write_hex(size, data, str_len + 1, str).status);
+    assert(strlen(str) == str_len);
+    assert(str_len % 2 == 0);
+
+    // Allocate buffer for decoded data with the same size as the input
+    uint8_t* const decoded      = (uint8_t*)malloc(size);
+    ExessBlob      decoded_blob = {size, decoded};
+
+    // Decode and check that data matches the original input
+    assert(!exess_read_hex(&decoded_blob, str).status);
+    assert(decoded_blob.size == size);
+    assert(!memcmp(decoded, data, size));
+
+    free(decoded);
+    free(str);
+    free(data);
+  }
+}
+
+int
+main(void)
+{
+  test_lowercase();
+  test_whitespace();
+  test_syntax_errors();
+  test_read_overflow();
+  test_write_overflow();
+  test_round_trip();
+
+  return 0;
+}