libpsl/src/psl2c.c

/*
 * Copyright(c) 2014 Tim Ruehsen
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 *
 * This file is part of libpsl.
 *
 * Precompile Public Suffix List into a C source file
 *
 * Changelog
 * 22.03.2014  Tim Ruehsen  created
 *
 */



#if HAVE_CONFIG_H
# include <config.h>
#endif

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <ctype.h>
#include <sys/stat.h>

#ifdef WITH_BUILTIN

#include <libpsl.h>

/* here we include the library source code to have access to internal functions and data structures */
#define _LIBPSL_INCLUDED_BY_PSL2C
#	include "psl.c"
#undef _LIBPSL_INCLUDED_BY_PSL2C

static void _print_psl_entries(FILE *fpout, const _psl_vector_t *v, const char *varname)
{
	int it;

#ifdef WITH_LIBICU
	do {
		UVersionInfo version_info;
		char version[U_MAX_VERSION_STRING_LENGTH];

		u_getVersion(version_info);
		u_versionToString(version_info, version);
		fprintf(fpout, "/* automatically generated by psl2c (punycode generated with libicu/%s) */\n", version);
	} while (0);
#else
	fprintf(fpout, "/* automatically generated by psl2c (without punycode support) */\n");
#endif

	fprintf(fpout, "static _psl_entry_t %s[] = {\n", varname);

	for (it = 0; it < v->cur; it++) {
		_psl_entry_t *e = _vector_get(v, it);

		fprintf(fpout, "\t{ \"%s\", NULL, %hd, %d, %d },\n",
			e->label_buf, e->length, (int) e->nlabels, (int) e->wildcard);
	}

	fprintf(fpout, "};\n");
}

#endif /* WITH_BUILTIN */

int main(int argc, const char **argv)
{
	FILE *fpout;
#ifdef WITH_BUILTIN
	psl_ctx_t *psl;
#endif
	int ret = 0;

	if (argc != 3) {
		fprintf(stderr, "Usage: psl2c <infile> <outfile>\n");
		fprintf(stderr, "  <infile>  is the 'effective_tld_names.dat' (aka Public Suffix List), lowercase UTF-8 encoded\n");
		fprintf(stderr, "  <outfile> is the the C filename to be generated from <infile>\n");
		return 1;
	}

#ifdef WITH_BUILTIN
	if (!(psl = psl_load_file(argv[1])))
		return 2;

	if ((fpout = fopen(argv[2], "w"))) {
		FILE *pp;
		struct stat st;
		size_t cmdsize = 16 + strlen(argv[1]);
		char *cmd = alloca(cmdsize), checksum[64] = "";

		_print_psl_entries(fpout, psl->suffixes, "suffixes");
		_print_psl_entries(fpout, psl->suffix_exceptions, "suffix_exceptions");

		snprintf(cmd, cmdsize, "sha1sum %s", argv[1]);
		if ((pp = popen(cmd, "r"))) {
			if (fscanf(pp, "%63[0-9a-zA-Z]", checksum) < 1)
				*checksum = 0;
			pclose(pp);
		}

		if (stat(argv[1], &st) != 0)
			st.st_mtime = 0;
		fprintf(fpout, "static time_t _psl_file_time = %lu;\n", st.st_mtime);
		fprintf(fpout, "static time_t _psl_compile_time = %lu;\n", time(NULL));
		fprintf(fpout, "static const char _psl_sha1_checksum[] = \"%s\";\n", checksum);
		fprintf(fpout, "static const char _psl_filename[] = \"%s\";\n", argv[1]);

		if (fclose(fpout) != 0)
			ret = 4;
	} else {
		fprintf(stderr, "Failed to write open '%s'\n", argv[2]);
		ret = 3;
	}

	psl_free(psl);
#else
	if ((fpout = fopen(argv[2], "w"))) {
		fprintf(fpout, "static _psl_entry_t suffixes[0];\n");
		fprintf(fpout, "static _psl_entry_t suffix_exceptions[0];\n");
		fprintf(fpout, "static time_t _psl_file_time;\n");
		fprintf(fpout, "static time_t _psl_compile_time;\n");
		fprintf(fpout, "static const char _psl_sha1_checksum[] = \"\";\n");
		fprintf(fpout, "static const char _psl_filename[] = \"\";\n");

		if (fclose(fpout) != 0)
			ret = 4;
	} else {
		fprintf(stderr, "Failed to write open '%s'\n", argv[2]);
		ret = 3;
	}

#endif /* WITH_BUILTIN */

	return ret;
}