CCommandLine improvements

* Make accessor inline.
* Add method 'AppendParametersFromFile' (will be used in a future init refactor).

r5dev/tier0/commandline.cpp

@@ -3,16 +3,60 @@
 // Purpose: Command line utilities
 //
 //=============================================================================//
-
 #include "tier0/commandline.h"
-#include "tier1/cvar.h"
 
 //-----------------------------------------------------------------------------
-// Instance singleton and expose interface to rest of code
+// Purpose: parses a text file and appends its parameters/values
 //-----------------------------------------------------------------------------
-CCommandLine* CommandLine(void)
+void CCommandLine::AppendParametersFromFile(const char* const pszConfig)
 {
-	return g_pCmdLine;
+	FILE* const pFile = fopen(pszConfig, "r");
+	if (!pFile)
+	{
+		printf("%s: '%s' does not exist!\n",
+			__FUNCTION__, pszConfig);
+		return;
+	}
+
+	char szTextBuf[2048];
+
+	while (fgets(szTextBuf, sizeof(szTextBuf), pFile))
+	{
+		// Trim newlines...
+		size_t nLen = strlen(szTextBuf);
+		if (nLen > 0 && szTextBuf[nLen - 1] == '\n')
+		{
+			szTextBuf[--nLen] = '\0';
+		}
+
+		char* const pSpacePos = strchr(szTextBuf, ' ');
+		const char* pArgValue = "";
+
+		if (pSpacePos)
+		{
+			// Skip space and move to value.
+			*pSpacePos = '\0';
+			char* pArg = pSpacePos + 1;
+
+			// Trim the quotes around the value.
+			if (*pArg == '\"')
+			{
+				pArg++;
+				char* const pEndQuote = strchr(pArg, '\"');
+
+				if (pEndQuote)
+				{
+					*pEndQuote = '\0';
+				}
+			}
+
+			pArgValue = pArg;
+		}
+
+		CommandLine()->AppendParm(szTextBuf, pArgValue);
+	}
+
+	fclose(pFile);
 }
 
 ///////////////////////////////////////////////////////////////////////////////

r5dev/tier0/commandline.h

@@ -3,6 +3,9 @@
 
 class CCommandLine : public ICommandLine // VTABLE @0x141369C78 in R5pc_r5launch_N1094_CL456479_2019_10_30_05_20_PM
 {
+public:
+	void AppendParametersFromFile(const char* const pszConfig);
+
 private:
 	enum
 	{
@@ -17,7 +20,13 @@ private:
 };
 
 extern CCommandLine* g_pCmdLine;
-CCommandLine* CommandLine(void);
+//-----------------------------------------------------------------------------
+// Instance singleton and expose interface to rest of code
+//-----------------------------------------------------------------------------
+inline CCommandLine* CommandLine(void)
+{
+	return g_pCmdLine;
+}
 
 ///////////////////////////////////////////////////////////////////////////////
 class VCommandLine : public IDetour