1 files changed, 183 insertions, 0 deletions
diff --git a/source/core/slang-hex-dump-util.cpp b/source/core/slang-hex-dump-util.cpp
new file mode 100644
index 000000000..908f6c1b6
--- /dev/null
+++ b/source/core/slang-hex-dump-util.cpp
@@ -0,0 +1,183 @@
+// slang-hex-dump-util.cpp
+#include "slang-hex-dump-util.h"
+
+#include "slang-common.h"
+#include "slang-string-util.h"
+#include "slang-writer.h"
+
+#include "../../slang-com-helper.h"
+
+namespace Slang
+{
+
+static const UnownedStringSlice s_start = UnownedStringSlice::fromLiteral("--START--");
+static const UnownedStringSlice s_end = UnownedStringSlice::fromLiteral("--END--");
+
+/* static */SlangResult HexDumpUtil::dumpWithMarkers(const List<uint8_t>& data, int maxBytesPerLine, ISlangWriter* writer)
+{
+    WriterHelper helper(writer);
+    SLANG_RETURN_ON_FAIL(helper.write(s_start.begin(), s_start.size()));
+    SLANG_RETURN_ON_FAIL(helper.print(" (%zu)\n", size_t(data.getCount())));
+
+    SLANG_RETURN_ON_FAIL(dump(data, maxBytesPerLine, writer));
+
+    SLANG_RETURN_ON_FAIL(helper.write(s_end.begin(), s_end.size()));
+    SLANG_RETURN_ON_FAIL(helper.put("\n"));
+    return SLANG_OK;
+}
+
+/* static */SlangResult HexDumpUtil::dump(const List<uint8_t>& data, int maxBytesPerLine, ISlangWriter* writer)
+{
+    int maxCharsPerLine = 2 * maxBytesPerLine + 1 + maxBytesPerLine + 1;
+
+    const uint8_t* cur = data.begin();
+    const uint8_t* end = data.end();
+
+    static char s_hex[] = "0123456789abcdef";
+
+    while (cur < end)
+    {
+        size_t count = size_t(end - cur);
+        count = (count > size_t(maxBytesPerLine)) ? size_t(maxBytesPerLine) : count;
+
+        char* startDst = writer->beginAppendBuffer(maxCharsPerLine);
+        char* dst = startDst;
+
+        for (size_t i = 0; i < count; ++i)
+        {
+            uint8_t byte = cur[i];
+            *dst++ = s_hex[byte >> 4];
+            *dst++ = s_hex[byte & 0xf];
+        }
+
+        *dst++ = ' ';
+
+        for (size_t i = 0; i < count; ++i)
+        {
+            char c = char(cur[i]);
+
+            if ((c >= '0' && c <= '9') ||
+                (c >= 'a' && c <= 'z') ||
+                (c >= 'A' && c <= 'Z') ||
+                (c >= 32 && (c & 0x80) == 0))
+            {
+            }
+            else
+            {
+                c = '.';
+            }
+            *dst++ = c;
+        }
+
+        *dst++ = '\n';
+        SLANG_ASSERT(dst <= startDst + maxCharsPerLine);
+
+        SLANG_RETURN_ON_FAIL(writer->endAppendBuffer(startDst, size_t(dst - startDst)));
+
+        cur += count;
+    }
+
+    return SLANG_OK;
+}
+
+static int _parseHexDigit(char c)
+{
+    if (c >= '0' && c <= '9')
+    {
+        return c -'0';
+    }
+    else if (c >= 'a' && c <= 'f')
+    {
+        return c - 'a' + 10;
+    }
+    else if (c >= 'A' && c <= 'F')
+    {
+        return c - 'A' + 10;
+    }
+    return -1;
+}
+
+/* static */SlangResult HexDumpUtil::parse(const UnownedStringSlice& lines, List<uint8_t>& outBytes)
+{
+    outBytes.clear();
+
+    bool inHex = false;
+
+    LineParser lineParser(lines);
+    for (const auto& line : lineParser)
+    {
+        if (!inHex)
+        {
+            if (line.startsWith(s_start))
+            {
+                inHex = true;
+                continue;
+            }
+        }
+        else
+        {
+            if (line.startsWith(s_end))
+            {
+                break;
+            }
+        }
+
+        const char* cur = line.begin();
+        const char* end = line.end();
+
+        while(cur + 2 <= end)
+        {
+            const char c = cur[0];
+            if (c == ' ' || c== '\n' || c == '\r' || c == '\t')
+            {
+                // Skip to next line
+                break;
+            }
+
+            const int hi = _parseHexDigit(c);
+            const int lo = _parseHexDigit(cur[1]);
+            cur += 2;
+
+            if (hi < 0 || lo < 0)
+            {
+                return SLANG_FAIL;
+            }
+            outBytes.add(uint8_t((hi << 4) | lo));
+        }
+    }
+
+    return SLANG_OK;
+}
+
+/* static */SlangResult HexDumpUtil::parseWithMarkers(const UnownedStringSlice& lines, List<uint8_t>& outBytes)
+{
+    UnownedStringSlice remaining(lines), line;
+
+    while(StringUtil::extractLine(remaining, line))
+    {
+        if (line.startsWith(s_start))
+        {
+            // Extract next line
+            if (!StringUtil::extractLine(remaining, line))
+            {
+                return SLANG_FAIL;
+            }
+            // It's the start line
+            UnownedStringSlice startLine = line;
+
+            // Look for the ending line
+            do 
+            {
+                if (line.startsWith(s_end))
+                {
+                    return parse(UnownedStringSlice(startLine.begin(), line.begin()), outBytes);
+                }
+            }
+            while ( StringUtil::extractLine(remaining, line));
+        }
+    }
+
+    return SLANG_FAIL;
+}
+
+}