Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 162 insertions, 0 deletions

diff --git a/js/src/jsapi-tests/testDeflateStringToUTF8Buffer.cpp b/js/src/jsapi-tests/testDeflateStringToUTF8Buffer.cpp
new file mode 100644
index 0000000000..b451fc4e2b
--- /dev/null
+++ b/js/src/jsapi-tests/testDeflateStringToUTF8Buffer.cpp
@@ -0,0 +1,162 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "jsapi-tests/tests.h"
+
+using namespace JS;
+
+BEGIN_TEST(test_DeflateStringToUTF8Buffer) {
+  JSString* str;
+  JSLinearString* linearStr;
+
+  // DeflateStringToUTF8Buffer does not write a null terminator, so the byte
+  // following the last byte written to the |actual| buffer should retain
+  // the value it held before the call to DeflateStringToUTF8Buffer, which is
+  // initialized to 0x1.
+
+  char actual[100];
+  auto span = mozilla::Span(actual);
+
+  // Test with an ASCII string, which calls JSLinearString::latin1Chars
+  // to retrieve the characters from the string and generates UTF-8 output
+  // that is identical to the ASCII input.
+
+  str = JS_NewStringCopyZ(cx, "Ohai");  // { 0x4F, 0x68, 0x61, 0x69 }
+  MOZ_RELEASE_ASSERT(str);
+  linearStr = JS_EnsureLinearString(cx, str);
+
+  {
+    const char expected[] = {0x4F, 0x68, 0x61, 0x69, 0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span);
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 4u);
+  }
+
+  {
+    const char expected[] = {0x4F, 0x68, 0x61, 0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(3));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 3u);
+  }
+
+  {
+    const unsigned char expected[] = {0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(0));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 0u);
+  }
+
+  // Test with a Latin-1 string, which calls JSLinearString::latin1Chars
+  // like with the ASCII string but generates UTF-8 output that is different
+  // from the ASCII input.
+
+  str = JS_NewUCStringCopyZ(cx, u"\xD3\x68\xE3\xEF");  // u"Óhãï"
+  MOZ_RELEASE_ASSERT(str);
+  linearStr = JS_EnsureLinearString(cx, str);
+
+  {
+    const unsigned char expected[] = {0xC3, 0x93, 0x68, 0xC3,
+                                      0xA3, 0xC3, 0xAF, 0x1};
+    memset(actual, 0x1, 100);
+    JS::DeflateStringToUTF8Buffer(linearStr, span);
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+  }
+
+  {
+    const unsigned char expected[] = {0xC3, 0x93, 0x68, 0xC3,
+                                      0xA3, 0xC3, 0xAF, 0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(7));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 7u);
+  }
+
+  {
+    // Specify a destination buffer length of 3.  That's exactly enough
+    // space to encode the first two characters, which takes three bytes.
+    const unsigned char expected[] = {0xC3, 0x93, 0x68, 0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(3));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 3u);
+  }
+
+  {
+    // Specify a destination buffer length of 4.  That's only enough space
+    // to encode the first two characters, which takes three bytes, because
+    // the third character would take another two bytes.
+    const unsigned char expected[] = {0xC3, 0x93, 0x68, 0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(4));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 3u);
+  }
+
+  {
+    const unsigned char expected[] = {0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(0));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 0u);
+  }
+
+  // Test with a UTF-16 string, which calls JSLinearString::twoByteChars
+  // to retrieve the characters from the string.
+
+  str = JS_NewUCStringCopyZ(cx, u"\x038C\x0068\x0203\x0457");  // u"Όhȃї"
+  MOZ_RELEASE_ASSERT(str);
+  linearStr = JS_EnsureLinearString(cx, str);
+
+  {
+    const unsigned char expected[] = {0xCE, 0x8C, 0x68, 0xC8,
+                                      0x83, 0xD1, 0x97, 0x1};
+    memset(actual, 0x1, 100);
+    JS::DeflateStringToUTF8Buffer(linearStr, span);
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+  }
+
+  {
+    const unsigned char expected[] = {0xCE, 0x8C, 0x68, 0xC8,
+                                      0x83, 0xD1, 0x97, 0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(7));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 7u);
+  }
+
+  {
+    // Specify a destination buffer length of 3.  That's exactly enough
+    // space to encode the first two characters, which takes three bytes.
+    const unsigned char expected[] = {0xCE, 0x8C, 0x68, 0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(3));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 3u);
+  }
+
+  {
+    // Specify a destination buffer length of 4.  That's only enough space
+    // to encode the first two characters, which takes three bytes, because
+    // the third character would take another two bytes.
+    const unsigned char expected[] = {0xCE, 0x8C, 0x68, 0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(4));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 3u);
+  }
+
+  {
+    const unsigned char expected[] = {0x1};
+    memset(actual, 0x1, 100);
+    size_t dstlen = JS::DeflateStringToUTF8Buffer(linearStr, span.To(0));
+    CHECK_EQUAL(memcmp(actual, expected, sizeof(expected)), 0);
+    CHECK_EQUAL(dstlen, 0u);
+  }
+
+  return true;
+}
+END_TEST(test_DeflateStringToUTF8Buffer)