Switch to zip archive format for resource data, prep work for moving from PICT/snd to BMP/WAV

PortabilityLayer/GPArchive.cpp

@@ -0,0 +1,84 @@
+#include "GPArchive.h"
+#include "ResTypeID.h"
+
+#include <string.h>
+
+static const char *gs_forbiddenNames[] =
+{
+	"COM1",
+	"COM2",
+	"COM3",
+	"COM4",
+	"COM5",
+	"COM6",
+	"COM7",
+	"COM8",
+	"COM9",
+	"LPT1",
+	"LPT2",
+	"LPT3",
+	"LPT4",
+	"LPT5",
+	"LPT6",
+	"LPT7",
+	"LPT8",
+	"LPT9",
+};
+
+namespace PortabilityLayer
+{
+	GpArcResourceTypeTag GpArcResourceTypeTag::Encode(const ResTypeID &tag)
+	{
+		static const char *nibbles = "0123456789abcdef";
+
+		char chars[4];
+		tag.ExportAsChars(chars);
+
+		GpArcResourceTypeTag output;
+		memset(&output, 0, sizeof(output));
+
+		char *outChar = output.m_id;
+		for (int i = 0; i < 4; i++)
+		{
+			char c = chars[i];
+
+			bool isForbidden = (c < ' ' || c == '<' || c == '>' || c == ':' || c == '\"' || c == '/' || c == '\\' || c == '|' || c == '?' || c == '*' || c > '~' || c == '$');
+
+			if (i == 3)
+			{
+				if (c == ' ' || c == '.')
+					isForbidden = true;
+				else
+				{
+					for (int fi = 0; fi < sizeof(gs_forbiddenNames) / sizeof(gs_forbiddenNames[0]); fi++)
+					{
+						if (!memcmp(chars, gs_forbiddenNames[fi], 4))
+						{
+							isForbidden = true;
+							break;
+						}
+					}
+				}
+			}
+
+			if (isForbidden)
+			{
+				uint8_t byteValue;
+				memcpy(&byteValue, &c, 1);
+
+				*outChar++ = '$';
+				int highNibble = (byteValue >> 4) & 0xf;
+				int lowNibble = (byteValue & 0xf);
+
+				*outChar++ = nibbles[highNibble];
+				*outChar++ = nibbles[lowNibble];
+			}
+			else
+			{
+				*outChar++ = c;
+			}
+		}
+
+		return output;
+	}
+}