third_party/ijar/zip_main.cc - bazel - Git at Google

 // Copyright 2015 The Bazel Authors. All rights reserved.
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
 // You may obtain a copy of the License at
 //
 //    http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS,
 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 // See the License for the specific language governing permissions and
 // limitations under the License.

 //
 // Zip / Unzip file using ijar zip implementation.
 //
 // Note that this Zip implementation intentionally don't compute CRC-32
 // because it is useless computation for jar because Java doesn't care.
 // CRC-32 of all files in the zip file will be set to 0.
 //

 #include <errno.h>
 #include <limits.h>
 #include <stdint.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>

 #include <memory>
 #include <set>
 #include <string>

 #include "third_party/ijar/platform_utils.h"
 #include "third_party/ijar/zip.h"

 namespace devtools_ijar {

 //
 // A ZipExtractorProcessor that extract files in the ZIP file.
 //
 class UnzipProcessor : public ZipExtractorProcessor {
  public:
   // Create a processor who will extract the given files (or all files if NULL)
   // into output_root if "extract" is set to true and will print the list of
   // files and their unix modes if "verbose" is set to true.
   UnzipProcessor(const char *output_root, char **files, bool verbose,
                  bool extract, bool flatten)
       : output_root_(output_root),
         verbose_(verbose),
         extract_(extract),
         flatten_(flatten) {
     if (files != NULL) {
       for (int i = 0; files[i] != NULL; i++) {
         file_names.insert(std::string(files[i]));
       }
     }
   }

   virtual ~UnzipProcessor() {}

   virtual void Process(const char* filename, const u4 attr,
                        const u1* data, const size_t size);
   virtual bool Accept(const char* filename, const u4 attr) {
     // All entry files are accepted by default.
     if (file_names.empty()) {
       return true;
     } else {
       // If users have specified file entries, only accept those files.
       return file_names.count(std::string(filename)) == 1;
     }
   }

  private:
   const char *output_root_;
   const bool verbose_;
   const bool extract_;
   const bool flatten_;
   std::set<std::string> file_names;
 };

 // Concatene 2 path, path1 and path2, using / as a directory separator and
 // puting the result in "out". "size" specify the size of the output buffer
 void concat_path(char* out, const size_t size,
                  const char *path1, const char *path2) {
   int len1 = strlen(path1);
   size_t l = len1;
   strncpy(out, path1, size - 1);
   out[size-1] = 0;
   if (l < size - 1 && path1[len1] != '/' && path2[0] != '/') {
     out[l] = '/';
     l++;
     out[l] = 0;
   }
   if (l < size - 1) {
     strncat(out, path2, size - 1 - l);
   }
 }

 void UnzipProcessor::Process(const char* filename, const u4 attr,
                              const u1* data, const size_t size) {
   mode_t perm = zipattr_to_perm(attr);
   bool isdir = zipattr_is_dir(attr);
   const char *output_file_name = filename;
   if (attr == 0) {
     // Fallback when the external attribute is not set.
     isdir = filename[strlen(filename)-1] == '/';
     perm = 0777;
   }

   if (flatten_) {
     if (isdir) {
       return;
     }
     const char *p = strrchr(filename, '/');
     if (p != NULL) {
       output_file_name = p + 1;
     }
   }

   if (verbose_) {
     printf("%c %o %s\n", isdir ? 'd' : 'f', perm, output_file_name);
   }
   if (extract_) {
     char path[PATH_MAX];
     concat_path(path, PATH_MAX, output_root_, output_file_name);
     if (!make_dirs(path, perm) ||
         (!isdir && !write_file(path, perm, data, size))) {
       abort();
     }
   }
 }

 // Get the basename of path and store it in output. output_size
 // is the size of the output buffer.
 void basename(const char *path, char *output, size_t output_size) {
   const char *pointer = strrchr(path, '/');
   if (pointer == NULL) {
     pointer = path;
   } else {
     pointer++;  // Skip the leading slash.
   }
   strncpy(output, pointer, output_size);
   output[output_size-1] = 0;
 }

 // Execute the extraction (or just listing if just v is provided)
 int extract(char *zipfile, char *exdir, char **files, bool verbose,
             bool extract, bool flatten) {
   std::string cwd = get_cwd();
   if (cwd.empty()) {
     return -1;
   }

   char output_root[PATH_MAX];
   if (exdir != NULL) {
     concat_path(output_root, PATH_MAX, cwd.c_str(), exdir);
   } else {
     strncpy(output_root, cwd.c_str(), PATH_MAX);
   }

   UnzipProcessor processor(output_root, files, verbose, extract, flatten);
   std::unique_ptr<ZipExtractor> extractor(ZipExtractor::Create(zipfile,
                                                                &processor));
   if (extractor == NULL) {
     fprintf(stderr, "Unable to open zip file %s: %s.\n", zipfile,
             strerror(errno));
     return -1;
   }

   if (extractor->ProcessAll() < 0) {
     fprintf(stderr, "%s.\n", extractor->GetError());
     return -1;
   }
   return 0;
 }

 // add a file to the zip
 int add_file(std::unique_ptr<ZipBuilder> const &builder, char *file,
              char *zip_path, bool flatten, bool verbose, bool compress) {
   Stat file_stat = {0, 0666, false};
   if (file != NULL) {
     if (!stat_file(file, &file_stat)) {
       fprintf(stderr, "Cannot stat file %s: %s\n", file, strerror(errno));
       return -1;
     }
   }
   char *final_path = zip_path != NULL ? zip_path : file;

   bool isdir = file_stat.is_directory;

   if (flatten && isdir) {
     return 0;
   }

   // Compute the path, flattening it if requested
   char path[PATH_MAX];
   size_t len = strlen(final_path);
   if (len > PATH_MAX) {
     fprintf(stderr, "Path too long: %s.\n", final_path);
     return -1;
   }
   if (flatten) {
     basename(final_path, path, PATH_MAX);
   } else {
     strncpy(path, final_path, PATH_MAX);
     path[PATH_MAX - 1] = 0;
     if (isdir && len < PATH_MAX - 1) {
       // Add the trailing slash for folders
       path[len] = '/';
       path[len + 1] = 0;
     }
   }

   if (verbose) {
     mode_t perm = file_stat.file_mode & 0777;
     printf("%c %o %s\n", isdir ? 'd' : 'f', perm, path);
   }

   u1 *buffer = builder->NewFile(path, stat_to_zipattr(file_stat));
   if (isdir || file_stat.total_size == 0) {
     builder->FinishFile(0);
   } else {
     if (!read_file(file, buffer, file_stat.total_size)) {
       return -1;
     }
     builder->FinishFile(file_stat.total_size, compress, true);
   }
   return 0;
 }

 // Read a list of files separated by newlines. The resulting array can be
 // freed using the free method.
 char **read_filelist(char *filename) {
   Stat file_stat;
   if (!stat_file(filename, &file_stat)) {
     fprintf(stderr, "Cannot stat file %s: %s\n", filename, strerror(errno));
     return NULL;
   }

   char *data = static_cast<char *>(malloc(file_stat.total_size));
   if (!read_file(filename, data, file_stat.total_size)) {
     return NULL;
   }

   int nb_entries = 1;
   for (int i = 0; i < file_stat.total_size; i++) {
     if (data[i] == '\n') {
       nb_entries++;
     }
   }

   size_t sizeof_array = sizeof(char *) * (nb_entries + 1);
   void *result = malloc(sizeof_array + file_stat.total_size + 1);
   // copy the content
   char **filelist = static_cast<char **>(result);
   char *content = static_cast<char *>(result) + sizeof_array;
   memcpy(content, data, file_stat.total_size);
   content[file_stat.total_size] = '\0';
   free(data);
   // Create the corresponding array
   int j = 1;
   filelist[0] = content;
   for (int i = 0; i < file_stat.total_size; i++) {
     if (content[i] == '\n') {
       content[i] = 0;
       if (i + 1 < file_stat.total_size) {
         filelist[j] = content + i + 1;
         j++;
       }
     }
   }
   filelist[j] = NULL;
   return filelist;
 }

 // return real paths of the files
 char **parse_filelist(char *zipfile, char **file_entries, int nb_entries,
                       bool flatten) {
   // no need to free since the path lists should live until the end of the
   // program
   char **files = static_cast<char **>(malloc(sizeof(char *) * nb_entries));
   char **zip_paths = file_entries;
   for (int i = 0; i < nb_entries; i++) {
     char *p_eq = strchr(file_entries[i], '=');
     if (p_eq != NULL) {
       if (flatten) {
         fprintf(stderr, "Unable to create zip file %s: %s.\n", zipfile,
                 "= can't be used with flatten");
         free(files);
         return NULL;
       }
       if (p_eq == file_entries[i]) {
         fprintf(stderr, "Unable to create zip file %s: %s.\n", zipfile,
                 "A zip path should be given before =");
         free(files);
         return NULL;
       }
       *p_eq = '\0';
       files[i] = p_eq + 1;
       if (files[i][0] == '\0') {
         files[i] = NULL;
       }
     } else {
       files[i] = file_entries[i];
       zip_paths[i] = NULL;
     }
   }
   return files;
 }

 // Execute the create operation
 int create(char *zipfile, char **file_entries, bool flatten, bool verbose,
            bool compress) {
   int nb_entries = 0;
   while (file_entries[nb_entries] != NULL) {
     nb_entries++;
   }
   char **zip_paths = file_entries;
   char **files = parse_filelist(zipfile, file_entries, nb_entries, flatten);
   if (files == NULL) {
     return -1;
   }

   u8 size = ZipBuilder::EstimateSize(files, zip_paths, nb_entries);
   if (size == 0) {
     return -1;
   }
   std::unique_ptr<ZipBuilder> builder(ZipBuilder::Create(zipfile, size));
   if (builder == NULL) {
     fprintf(stderr, "Unable to create zip file %s: %s.\n",
             zipfile, strerror(errno));
     return -1;
   }

   for (int i = 0; i < nb_entries; i++) {
     if (add_file(builder, files[i], zip_paths[i], flatten, verbose, compress) <
         0) {
       return -1;
     }
   }
   if (builder->Finish() < 0) {
     fprintf(stderr, "%s\n", builder->GetError());
     return -1;
   }
   return 0;
 }

 }  // namespace devtools_ijar

 //
 // main method
 //
 static void usage(char *progname) {
   fprintf(stderr,
           "Usage: %s [vxc[fC]] x.zip [-d exdir] [[zip_path1=]file1 ... "
           "[zip_pathn=]filen]\n",
           progname);
   fprintf(stderr, "  v verbose - list all file in x.zip\n");
   fprintf(stderr,
           "  x extract - extract files in x.zip to current directory, or "
           "    an optional directory relative to the current directory "
           "    specified through -d option\n");
   fprintf(stderr, "  c create  - add files to x.zip\n");
   fprintf(stderr,
           "  f flatten - flatten files to use with create or "
           "extract operation\n");
   fprintf(stderr,
           "  C compress - compress files when using the create operation\n");
   fprintf(stderr, "x and c cannot be used in the same command-line.\n");
   fprintf(stderr,
           "\nFor every file, a path in the zip can be specified. Examples:\n");
   fprintf(stderr,
           "  zipper c x.zip a/b/__init__.py= # Add an empty file at "
           "a/b/__init__.py\n");
   fprintf(stderr,
           "  zipper c x.zip a/b/main.py=foo/bar/bin.py # Add file "
           "foo/bar/bin.py at a/b/main.py\n");
   fprintf(stderr,
           "\nIf the zip path is not specified, it is assumed to be the file "
           "path.\n");
   exit(1);
 }

 int main(int argc, char **argv) {
   bool extract = false;
   bool verbose = false;
   bool create = false;
   bool compress = false;
   bool flatten = false;

   if (argc < 3) {
     usage(argv[0]);
   }

   for (int i = 0; argv[1][i] != 0; i++) {
     switch (argv[1][i]) {
     case 'x':
       extract = true;
       break;
     case 'v':
       verbose = true;
       break;
     case 'c':
       create = true;
       break;
     case 'f':
       flatten = true;
       break;
     case 'C':
       compress = true;
       break;
     default:
       usage(argv[0]);
     }
   }

   // x and c cannot be used in the same command-line.
   if (create && extract) {
     usage(argv[0]);
   }

   // Calculate the argument index of the first entry file.
   int filelist_start_index;
   if (argc > 3 && strcmp(argv[3], "-d") == 0) {
     filelist_start_index = 5;
   } else {
     filelist_start_index = 3;
   }

   char** filelist = NULL;

   // We have one option file. Read and extract the content.
   if (argc == filelist_start_index + 1 &&
       argv[filelist_start_index][0] == '@') {
     char* filelist_name = argv[filelist_start_index];
     filelist = devtools_ijar::read_filelist(filelist_name + 1);
     if (filelist == NULL) {
       fprintf(stderr, "Can't read file list %s: %s.\n", filelist_name,
               strerror(errno));
       return -1;
     }
     // We have more than one files. Assume that they are all file entries.
   } else if (argc >= filelist_start_index + 1) {
     filelist = argv + filelist_start_index;
   } else {
     // There are no entry files specified. This is forbidden if we are creating
     // a zip file.
     if (create) {
       fprintf(stderr, "Can't create zip without input files specified.");
       return -1;
     }
   }

   if (create) {
     // Create a zip
     return devtools_ijar::create(argv[2], filelist, flatten, verbose, compress);
   } else {
     char* exdir = NULL;
     if (argc > 3 && strcmp(argv[3], "-d") == 0) {
       exdir = argv[4];
     }

     // Extraction / list mode
     return devtools_ijar::extract(argv[2], exdir, filelist, verbose, extract,
                                   flatten);
   }
 }
	// Copyright 2015 The Bazel Authors. All rights reserved.
	//
	// Licensed under the Apache License, Version 2.0 (the "License");
	// you may not use this file except in compliance with the License.
	// You may obtain a copy of the License at
	//
	// http://www.apache.org/licenses/LICENSE-2.0
	//
	// Unless required by applicable law or agreed to in writing, software
	// distributed under the License is distributed on an "AS IS" BASIS,
	// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	// See the License for the specific language governing permissions and
	// limitations under the License.

	//
	// Zip / Unzip file using ijar zip implementation.
	//
	// Note that this Zip implementation intentionally don't compute CRC-32
	// because it is useless computation for jar because Java doesn't care.
	// CRC-32 of all files in the zip file will be set to 0.
	//

	#include <errno.h>
	#include <limits.h>
	#include <stdint.h>
	#include <stdio.h>
	#include <stdlib.h>
	#include <string.h>

	#include <memory>
	#include <set>
	#include <string>

	#include "third_party/ijar/platform_utils.h"
	#include "third_party/ijar/zip.h"

	namespace devtools_ijar {

	//
	// A ZipExtractorProcessor that extract files in the ZIP file.
	//
	class UnzipProcessor : public ZipExtractorProcessor {
	public:
	// Create a processor who will extract the given files (or all files if NULL)
	// into output_root if "extract" is set to true and will print the list of
	// files and their unix modes if "verbose" is set to true.
	UnzipProcessor(const char output_root, char *files, bool verbose,
	bool extract, bool flatten)
	: output_root_(output_root),
	verbose_(verbose),
	extract_(extract),
	flatten_(flatten) {
	if (files != NULL) {
	for (int i = 0; files[i] != NULL; i++) {
	file_names.insert(std::string(files[i]));
	}
	}
	}

	virtual ~UnzipProcessor() {}

	virtual void Process(const char* filename, const u4 attr,
	const u1* data, const size_t size);
	virtual bool Accept(const char* filename, const u4 attr) {
	// All entry files are accepted by default.
	if (file_names.empty()) {
	return true;
	} else {
	// If users have specified file entries, only accept those files.
	return file_names.count(std::string(filename)) == 1;
	}
	}

	private:
	const char *output_root_;
	const bool verbose_;
	const bool extract_;
	const bool flatten_;
	std::set<std::string> file_names;
	};

	// Concatene 2 path, path1 and path2, using / as a directory separator and
	// puting the result in "out". "size" specify the size of the output buffer
	void concat_path(char* out, const size_t size,
	const char path1, const char path2) {
	int len1 = strlen(path1);
	size_t l = len1;
	strncpy(out, path1, size - 1);
	out[size-1] = 0;
	if (l < size - 1 && path1[len1] != '/' && path2[0] != '/') {
	out[l] = '/';
	l++;
	out[l] = 0;
	}
	if (l < size - 1) {
	strncat(out, path2, size - 1 - l);
	}
	}

	void UnzipProcessor::Process(const char* filename, const u4 attr,
	const u1* data, const size_t size) {
	mode_t perm = zipattr_to_perm(attr);
	bool isdir = zipattr_is_dir(attr);
	const char *output_file_name = filename;
	if (attr == 0) {
	// Fallback when the external attribute is not set.
	isdir = filename[strlen(filename)-1] == '/';
	perm = 0777;
	}

	if (flatten_) {
	if (isdir) {
	return;
	}
	const char *p = strrchr(filename, '/');
	if (p != NULL) {
	output_file_name = p + 1;
	}
	}

	if (verbose_) {
	printf("%c %o %s\n", isdir ? 'd' : 'f', perm, output_file_name);
	}
	if (extract_) {
	char path[PATH_MAX];
	concat_path(path, PATH_MAX, output_root_, output_file_name);
	if (!make_dirs(path, perm) \|\|
	(!isdir && !write_file(path, perm, data, size))) {
	abort();
	}
	}
	}

	// Get the basename of path and store it in output. output_size
	// is the size of the output buffer.
	void basename(const char path, char output, size_t output_size) {
	const char *pointer = strrchr(path, '/');
	if (pointer == NULL) {
	pointer = path;
	} else {
	pointer++; // Skip the leading slash.
	}
	strncpy(output, pointer, output_size);
	output[output_size-1] = 0;
	}

	// Execute the extraction (or just listing if just v is provided)
	int extract(char zipfile, char exdir, char **files, bool verbose,
	bool extract, bool flatten) {
	std::string cwd = get_cwd();
	if (cwd.empty()) {
	return -1;
	}

	char output_root[PATH_MAX];
	if (exdir != NULL) {
	concat_path(output_root, PATH_MAX, cwd.c_str(), exdir);
	} else {
	strncpy(output_root, cwd.c_str(), PATH_MAX);
	}

	UnzipProcessor processor(output_root, files, verbose, extract, flatten);
	std::unique_ptr<ZipExtractor> extractor(ZipExtractor::Create(zipfile,
	&processor));
	if (extractor == NULL) {
	fprintf(stderr, "Unable to open zip file %s: %s.\n", zipfile,
	strerror(errno));
	return -1;
	}

	if (extractor->ProcessAll() < 0) {
	fprintf(stderr, "%s.\n", extractor->GetError());
	return -1;
	}
	return 0;
	}

	// add a file to the zip
	int add_file(std::unique_ptr<ZipBuilder> const &builder, char *file,
	char *zip_path, bool flatten, bool verbose, bool compress) {
	Stat file_stat = {0, 0666, false};
	if (file != NULL) {
	if (!stat_file(file, &file_stat)) {
	fprintf(stderr, "Cannot stat file %s: %s\n", file, strerror(errno));
	return -1;
	}
	}
	char *final_path = zip_path != NULL ? zip_path : file;

	bool isdir = file_stat.is_directory;

	if (flatten && isdir) {
	return 0;
	}

	// Compute the path, flattening it if requested
	char path[PATH_MAX];
	size_t len = strlen(final_path);
	if (len > PATH_MAX) {
	fprintf(stderr, "Path too long: %s.\n", final_path);
	return -1;
	}
	if (flatten) {
	basename(final_path, path, PATH_MAX);
	} else {
	strncpy(path, final_path, PATH_MAX);
	path[PATH_MAX - 1] = 0;
	if (isdir && len < PATH_MAX - 1) {
	// Add the trailing slash for folders
	path[len] = '/';
	path[len + 1] = 0;
	}
	}

	if (verbose) {
	mode_t perm = file_stat.file_mode & 0777;
	printf("%c %o %s\n", isdir ? 'd' : 'f', perm, path);
	}

	u1 *buffer = builder->NewFile(path, stat_to_zipattr(file_stat));
	if (isdir \|\| file_stat.total_size == 0) {
	builder->FinishFile(0);
	} else {
	if (!read_file(file, buffer, file_stat.total_size)) {
	return -1;
	}
	builder->FinishFile(file_stat.total_size, compress, true);
	}
	return 0;
	}

	// Read a list of files separated by newlines. The resulting array can be
	// freed using the free method.
	char *read_filelist(char filename) {
	Stat file_stat;
	if (!stat_file(filename, &file_stat)) {
	fprintf(stderr, "Cannot stat file %s: %s\n", filename, strerror(errno));
	return NULL;
	}

	char data = static_cast<char >(malloc(file_stat.total_size));
	if (!read_file(filename, data, file_stat.total_size)) {
	return NULL;
	}

	int nb_entries = 1;
	for (int i = 0; i < file_stat.total_size; i++) {
	if (data[i] == '\n') {
	nb_entries++;
	}
	}

	size_t sizeof_array = sizeof(char ) (nb_entries + 1);
	void *result = malloc(sizeof_array + file_stat.total_size + 1);
	// copy the content
	char filelist = static_cast<char >(result);
	char content = static_cast<char >(result) + sizeof_array;
	memcpy(content, data, file_stat.total_size);
	content[file_stat.total_size] = '\0';
	free(data);
	// Create the corresponding array
	int j = 1;
	filelist[0] = content;
	for (int i = 0; i < file_stat.total_size; i++) {
	if (content[i] == '\n') {
	content[i] = 0;
	if (i + 1 < file_stat.total_size) {
	filelist[j] = content + i + 1;
	j++;
	}
	}
	}
	filelist[j] = NULL;
	return filelist;
	}

	// return real paths of the files
	char *parse_filelist(char zipfile, char **file_entries, int nb_entries,
	bool flatten) {
	// no need to free since the path lists should live until the end of the
	// program
	char files = static_cast<char >(malloc(sizeof(char ) nb_entries));
	char **zip_paths = file_entries;
	for (int i = 0; i < nb_entries; i++) {
	char *p_eq = strchr(file_entries[i], '=');
	if (p_eq != NULL) {
	if (flatten) {
	fprintf(stderr, "Unable to create zip file %s: %s.\n", zipfile,
	"= can't be used with flatten");
	free(files);
	return NULL;
	}
	if (p_eq == file_entries[i]) {
	fprintf(stderr, "Unable to create zip file %s: %s.\n", zipfile,
	"A zip path should be given before =");
	free(files);
	return NULL;
	}
	*p_eq = '\0';
	files[i] = p_eq + 1;
	if (files[i][0] == '\0') {
	files[i] = NULL;
	}
	} else {
	files[i] = file_entries[i];
	zip_paths[i] = NULL;
	}
	}
	return files;
	}

	// Execute the create operation
	int create(char zipfile, char *file_entries, bool flatten, bool verbose,
	bool compress) {
	int nb_entries = 0;
	while (file_entries[nb_entries] != NULL) {
	nb_entries++;
	}
	char **zip_paths = file_entries;
	char **files = parse_filelist(zipfile, file_entries, nb_entries, flatten);
	if (files == NULL) {
	return -1;
	}

	u8 size = ZipBuilder::EstimateSize(files, zip_paths, nb_entries);
	if (size == 0) {
	return -1;
	}
	std::unique_ptr<ZipBuilder> builder(ZipBuilder::Create(zipfile, size));
	if (builder == NULL) {
	fprintf(stderr, "Unable to create zip file %s: %s.\n",
	zipfile, strerror(errno));
	return -1;
	}

	for (int i = 0; i < nb_entries; i++) {
	if (add_file(builder, files[i], zip_paths[i], flatten, verbose, compress) <
	0) {
	return -1;
	}
	}
	if (builder->Finish() < 0) {
	fprintf(stderr, "%s\n", builder->GetError());
	return -1;
	}
	return 0;
	}

	} // namespace devtools_ijar

	//
	// main method
	//
	static void usage(char *progname) {
	fprintf(stderr,
	"Usage: %s [vxc[fC]] x.zip [-d exdir] [[zip_path1=]file1 ... "
	"[zip_pathn=]filen]\n",
	progname);
	fprintf(stderr, " v verbose - list all file in x.zip\n");
	fprintf(stderr,
	" x extract - extract files in x.zip to current directory, or "
	" an optional directory relative to the current directory "
	" specified through -d option\n");
	fprintf(stderr, " c create - add files to x.zip\n");
	fprintf(stderr,
	" f flatten - flatten files to use with create or "
	"extract operation\n");
	fprintf(stderr,
	" C compress - compress files when using the create operation\n");
	fprintf(stderr, "x and c cannot be used in the same command-line.\n");
	fprintf(stderr,
	"\nFor every file, a path in the zip can be specified. Examples:\n");
	fprintf(stderr,
	" zipper c x.zip a/b/__init__.py= # Add an empty file at "
	"a/b/__init__.py\n");
	fprintf(stderr,
	" zipper c x.zip a/b/main.py=foo/bar/bin.py # Add file "
	"foo/bar/bin.py at a/b/main.py\n");
	fprintf(stderr,
	"\nIf the zip path is not specified, it is assumed to be the file "
	"path.\n");
	exit(1);
	}

	int main(int argc, char **argv) {
	bool extract = false;
	bool verbose = false;
	bool create = false;
	bool compress = false;
	bool flatten = false;

	if (argc < 3) {
	usage(argv[0]);
	}

	for (int i = 0; argv[1][i] != 0; i++) {
	switch (argv[1][i]) {
	case 'x':
	extract = true;
	break;
	case 'v':
	verbose = true;
	break;
	case 'c':
	create = true;
	break;
	case 'f':
	flatten = true;
	break;
	case 'C':
	compress = true;
	break;
	default:
	usage(argv[0]);
	}
	}

	// x and c cannot be used in the same command-line.
	if (create && extract) {
	usage(argv[0]);
	}

	// Calculate the argument index of the first entry file.
	int filelist_start_index;
	if (argc > 3 && strcmp(argv[3], "-d") == 0) {
	filelist_start_index = 5;
	} else {
	filelist_start_index = 3;
	}

	char** filelist = NULL;

	// We have one option file. Read and extract the content.
	if (argc == filelist_start_index + 1 &&
	argv[filelist_start_index][0] == '@') {
	char* filelist_name = argv[filelist_start_index];
	filelist = devtools_ijar::read_filelist(filelist_name + 1);
	if (filelist == NULL) {
	fprintf(stderr, "Can't read file list %s: %s.\n", filelist_name,
	strerror(errno));
	return -1;
	}
	// We have more than one files. Assume that they are all file entries.
	} else if (argc >= filelist_start_index + 1) {
	filelist = argv + filelist_start_index;
	} else {
	// There are no entry files specified. This is forbidden if we are creating
	// a zip file.
	if (create) {
	fprintf(stderr, "Can't create zip without input files specified.");
	return -1;
	}
	}

	if (create) {
	// Create a zip
	return devtools_ijar::create(argv[2], filelist, flatten, verbose, compress);
	} else {
	char* exdir = NULL;
	if (argc > 3 && strcmp(argv[3], "-d") == 0) {
	exdir = argv[4];
	}

	// Extraction / list mode
	return devtools_ijar::extract(argv[2], exdir, filelist, verbose, extract,
	flatten);
	}
	}