--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/namedenums/namedenums.cpp Sun Mar 30 21:51:23 2014 +0300
@@ -0,0 +1,251 @@
+/*
+ Copyright 2014 Santeri Piippo
+ All rights reserved.
+
+ Redistribution and use in source and binary forms, with or without
+ modification, are permitted provided that the following conditions
+ are met:
+
+ 1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+ 2. Redistributions in binary form must reproduce the above copyright
+ notice, this list of conditions and the following disclaimer in the
+ documentation and/or other materials provided with the distribution.
+ 3. The name of the author may not be used to endorse or promote products
+ derived from this software without specific prior written permission.
+
+ THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+#include <string>
+#include <deque>
+#include <algorithm>
+#include <cerrno>
+#include <cstdio>
+#include <cstdlib>
+#include <cstring>
+#include <cstdarg>
+
+using std::string;
+using std::deque;
+
+static int gLineNumber;
+static std::string gCurrentFile;
+
+// =============================================================================
+//
+struct NamedEnumInfo
+{
+ string name;
+ deque<string> enumerators;
+};
+
+// =============================================================================
+//
+void SkipWhitespace (char*& cp)
+{
+ while (isspace (*cp))
+ {
+ if (*cp == '\n')
+ gLineNumber++;
+
+ ++cp;
+ }
+
+ if (strncmp (cp, "//", 2) == 0)
+ {
+ while (*(++cp) != '\n')
+ ;
+
+ gLineNumber++;
+ SkipWhitespace (cp);
+ }
+}
+
+// =============================================================================
+//
+void Error (const char* fmt, ...)
+{
+ char buf[1024];
+ va_list va;
+ va_start (va, fmt);
+ vsprintf (buf, fmt, va);
+ va_end (va);
+ throw std::string (buf);
+}
+
+// =============================================================================
+//
+int main (int argc, char* argv[])
+{
+ try
+ {
+ deque<NamedEnumInfo> namedEnumerations;
+ deque<string> filesToInclude;
+
+ if (argc < 3)
+ {
+ fprintf (stderr, "usage: %s input [input [input [...]]] output\n", argv[0]);
+ return EXIT_FAILURE;
+ }
+
+ for (int i = 1; i < argc - 1; ++ i)
+ {
+ gCurrentFile = argv[i];
+ FILE* fp = fopen (argv[i], "r");
+ char* buf;
+ gLineNumber = 1;
+
+ if (fp == NULL)
+ {
+ fprintf (stderr, "could not open %s for writing: %s\n",
+ argv[i], strerror (errno));
+ exit (EXIT_FAILURE);
+ }
+
+ fseek (fp, 0, SEEK_END);
+ long int filesize = ftell (fp);
+ rewind (fp);
+
+ try
+ {
+ buf = new char[filesize];
+ }
+ catch (std::bad_alloc)
+ {
+ Error ("could not allocate %ld bytes for %s\n", filesize, argv[i]);
+ }
+
+ if (static_cast<long> (fread (buf, 1, filesize, fp)) < filesize)
+ Error ("could not read %ld bytes from %s\n", filesize, argv[i]);
+
+ char* const end = &buf[0] + filesize;
+
+ for (char* cp = &buf[0]; cp < end; ++cp)
+ {
+ SkipWhitespace (cp);
+
+ if (strncmp (cp, "#define ", strlen ("#define ")) == 0)
+ {
+ while (cp < end && *cp != '\n')
+ cp++;
+
+ continue;
+ }
+
+ if ((cp != &buf[0] && isspace (* (cp - 1)) == false) ||
+ strncmp (cp, "named_enum ", strlen ("named_enum ")) != 0)
+ {
+ continue;
+ }
+
+ cp += strlen ("named_enum ");
+ SkipWhitespace (cp);
+
+ NamedEnumInfo nenum;
+ auto& enumname = nenum.name;
+ auto& enumerators = nenum.enumerators;
+
+ if (isalpha (*cp) == false && *cp != '_')
+ Error ("anonymous named_enum");
+
+ while (isalnum (*cp) || *cp == '_')
+ enumname += *cp++;
+
+ SkipWhitespace (cp);
+
+ if (*cp++ != '{')
+ Error ("expected '{' after named_enum");
+
+ for (;;)
+ {
+ SkipWhitespace (cp);
+
+ if (*cp == '}')
+ {
+ cp++;
+ break;
+ }
+
+ if (isalpha (*cp) == false && *cp != '_')
+ Error ("expected identifier, got '%c'", *cp);
+
+ std::string enumerator;
+
+ while (isalnum (*cp) || *cp == '_')
+ enumerator += *cp++;
+
+ SkipWhitespace (cp);
+
+ if (*cp == ',')
+ SkipWhitespace (++cp);
+
+ if (*cp == '=')
+ Error ("named enums must not have defined values");
+
+ enumerators.push_back (enumerator);
+ }
+
+ SkipWhitespace (cp);
+
+ if (*cp != ';')
+ Error ("expected ';'");
+
+ if (enumerators.size() > 0)
+ {
+ namedEnumerations.push_back (nenum);
+ filesToInclude.push_back (argv[i]);
+ }
+ }
+ }
+
+ FILE* fp;
+
+ if ((fp = fopen (argv[argc - 1], "w")) == NULL)
+ Error ("couldn't open %s for writing: %s", argv[argc - 1], strerror (errno));
+
+ fprintf (fp, "#pragma once\n");
+
+ std::sort (filesToInclude.begin(), filesToInclude.end());
+ auto pos = std::unique (filesToInclude.begin(), filesToInclude.end());
+ filesToInclude.resize (std::distance (filesToInclude.begin(), pos));
+
+ for (const string& a : filesToInclude)
+ fprintf (fp, "#include \"%s\"\n", basename (a.c_str()));
+
+ for (NamedEnumInfo& e : namedEnumerations)
+ {
+ fprintf (fp, "\nstatic const char* g_%sNames[] =\n{\n", e.name.c_str());
+
+ for (const string& a : e.enumerators)
+ fprintf (fp, "\t\"%s\",\n", a.c_str());
+
+ fprintf (fp, "};\n\n");
+
+ fprintf (fp, "inline const char* get%sString (%s a)\n"
+ "{\n"
+ "\treturn g_%sNames[a];\n"
+ "}\n",
+ e.name.c_str(), e.name.c_str(), e.name.c_str());
+ }
+
+ printf ("Wrote named enumerations to %s\n", argv[argc - 1]);
+ fclose (fp);
+ }
+ catch (std::string a)
+ {
+ fprintf (stderr, "%s:%d: error: %s\n", gCurrentFile.c_str(), gLineNumber, a.c_str());
+ return 1;
+ }
+
+ return 0;
+}