9039e728b2
also, added support for pre-compiled headers since I'm now using a centralized resource for system headers.
146 lines
3.2 KiB
C++
146 lines
3.2 KiB
C++
#include "utils.h"
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namespace ledger {
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string expand_path(const string& path)
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{
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if (path.length() == 0 || path[0] != '~')
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return path;
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const char * pfx = NULL;
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string::size_type pos = path.find_first_of('/');
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if (path.length() == 1 || pos == 1) {
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pfx = std::getenv("HOME");
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#ifdef HAVE_GETPWUID
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if (! pfx) {
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// Punt. We're trying to expand ~/, but HOME isn't set
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struct passwd * pw = getpwuid(getuid());
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if (pw)
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pfx = pw->pw_dir;
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}
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#endif
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}
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#ifdef HAVE_GETPWNAM
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else {
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string user(path, 1, pos == string::npos ?
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string::npos : pos - 1);
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struct passwd * pw = getpwnam(user.c_str());
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if (pw)
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pfx = pw->pw_dir;
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}
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#endif
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// if we failed to find an expansion, return the path unchanged.
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if (! pfx)
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return path;
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string result(pfx);
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if (pos == string::npos)
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return result;
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if (result.length() == 0 || result[result.length() - 1] != '/')
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result += '/';
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result += path.substr(pos + 1);
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return result;
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}
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string resolve_path(const string& path)
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{
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if (path[0] == '~')
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return expand_path(path);
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return path;
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}
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string abbreviate(const string& str, unsigned int width,
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elision_style_t elision_style, const bool is_account,
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int abbrev_length)
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{
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const unsigned int len = str.length();
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if (len <= width)
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return str;
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assert(width < 4095);
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static char buf[4096];
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switch (elision_style) {
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case TRUNCATE_LEADING:
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// This method truncates at the beginning.
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std::strncpy(buf, str.c_str() + (len - width), width);
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buf[0] = '.';
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buf[1] = '.';
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break;
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case TRUNCATE_MIDDLE:
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// This method truncates in the middle.
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std::strncpy(buf, str.c_str(), width / 2);
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std::strncpy(buf + width / 2,
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str.c_str() + (len - (width / 2 + width % 2)),
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width / 2 + width % 2);
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buf[width / 2 - 1] = '.';
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buf[width / 2] = '.';
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break;
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case ABBREVIATE:
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if (is_account) {
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std::list<string> parts;
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string::size_type beg = 0;
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for (string::size_type pos = str.find(':');
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pos != string::npos;
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beg = pos + 1, pos = str.find(':', beg))
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parts.push_back(string(str, beg, pos - beg));
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parts.push_back(string(str, beg));
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string result;
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unsigned int newlen = len;
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for (std::list<string>::iterator i = parts.begin();
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i != parts.end();
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i++) {
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// Don't contract the last element
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std::list<string>::iterator x = i;
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if (++x == parts.end()) {
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result += *i;
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break;
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}
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if (newlen > width) {
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result += string(*i, 0, abbrev_length);
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result += ":";
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newlen -= (*i).length() - abbrev_length;
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} else {
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result += *i;
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result += ":";
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}
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}
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if (newlen > width) {
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// Even abbreviated its too big to show the last account, so
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// abbreviate all but the last and truncate at the beginning.
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std::strncpy(buf, result.c_str() + (result.length() - width), width);
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buf[0] = '.';
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buf[1] = '.';
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} else {
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std::strcpy(buf, result.c_str());
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}
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break;
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}
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// fall through...
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case TRUNCATE_TRAILING:
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// This method truncates at the end (the default).
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std::strncpy(buf, str.c_str(), width - 2);
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buf[width - 2] = '.';
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buf[width - 1] = '.';
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break;
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}
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buf[width] = '\0';
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return buf;
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}
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} // namespace ledger
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