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9f76136876
This is useful to avoid creation of std::strings from const char* several times when it's not really needed.
63 lines
1.6 KiB
C++
63 lines
1.6 KiB
C++
// Aseprite
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// Copyright (C) 2001-2017 David Capello
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//
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// This program is distributed under the terms of
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// the End-User License Agreement for Aseprite.
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "app/file/split_filename.h"
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#include "base/convert_to.h"
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#include "base/fs.h"
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#include "base/string.h"
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#include <cstring>
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namespace app {
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// Splits a file-name like "my_ani0000.pcx" to "my_ani" and ".pcx",
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// returning the number of the center; returns "-1" if the function
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// can't split anything
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int split_filename(const std::string& filename, std::string& left, std::string& right, int& width)
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{
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left = base::join_path(
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base::get_file_path(filename),
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base::get_file_title(filename));
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right = base::get_file_extension(filename);
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if (!right.empty())
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right.insert(right.begin(), '.');
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// Remove all trailing numbers in the "left" side, and pass they to "result_str".
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std::string result_str;
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width = 0;
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for (;;) {
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// Get the last UTF-8 character (as we don't have a
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// reverse_iterator, we iterate from the beginning)
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int chr = 0;
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base::utf8_const_iterator begin(left.begin()), end(left.end());
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base::utf8_const_iterator it(begin), prev(begin);
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for (; it != end; prev=it, ++it)
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chr = *it;
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if ((chr >= '0') && (chr <= '9')) {
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result_str.insert(result_str.begin(), chr);
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width++;
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left.erase(prev - begin);
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}
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else
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break;
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}
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// Convert the "buf" to integer and return it.
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if (!result_str.empty()) {
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return base::convert_to<int>(result_str);
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}
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else
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return -1;
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}
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} // namespace app
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