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#include "util.h"
#include <list>
#include <string>
#include <cstring>
#include <cstdlib>
#ifdef WIN32
#include <io.h>
#else
#include <unistd.h>
#endif
#if defined(HAVE_GETPWUID) || defined(HAVE_GETPWNAM)
#include <pwd.h>
#endif
namespace ledger {
string expand_path(const string& path)
{
if (path.length() == 0 || path[0] != '~')
return path;
const char * pfx = NULL;
string::size_type pos = path.find_first_of('/');
if (path.length() == 1 || pos == 1) {
pfx = std::getenv("HOME");
#ifdef HAVE_GETPWUID
if (! pfx) {
// Punt. We're trying to expand ~/, but HOME isn't set
struct passwd * pw = getpwuid(getuid());
if (pw)
pfx = pw->pw_dir;
}
#endif
}
#ifdef HAVE_GETPWNAM
else {
string user(path, 1, pos == string::npos ?
string::npos : pos - 1);
struct passwd * pw = getpwnam(user.c_str());
if (pw)
pfx = pw->pw_dir;
}
#endif
// if we failed to find an expansion, return the path unchanged.
if (! pfx)
return path;
string result(pfx);
if (pos == string::npos)
return result;
if (result.length() == 0 || result[result.length() - 1] != '/')
result += '/';
result += path.substr(pos + 1);
return result;
}
string resolve_path(const string& path)
{
if (path[0] == '~')
return expand_path(path);
return path;
}
string abbreviate(const string& str, unsigned int width,
elision_style_t elision_style, const bool is_account,
int abbrev_length)
{
const unsigned int len = str.length();
if (len <= width)
return str;
//assert(width < 4095);
char buf[4096];
switch (elision_style) {
case TRUNCATE_LEADING:
// This method truncates at the beginning.
std::strncpy(buf, str.c_str() + (len - width), width);
buf[0] = '.';
buf[1] = '.';
break;
case TRUNCATE_MIDDLE:
// This method truncates in the middle.
std::strncpy(buf, str.c_str(), width / 2);
std::strncpy(buf + width / 2,
str.c_str() + (len - (width / 2 + width % 2)),
width / 2 + width % 2);
buf[width / 2 - 1] = '.';
buf[width / 2] = '.';
break;
case ABBREVIATE:
if (is_account) {
std::list<string> parts;
string::size_type beg = 0;
for (string::size_type pos = str.find(':');
pos != string::npos;
beg = pos + 1, pos = str.find(':', beg))
parts.push_back(string(str, beg, pos - beg));
parts.push_back(string(str, beg));
string result;
unsigned int newlen = len;
for (std::list<string>::iterator i = parts.begin();
i != parts.end();
i++) {
// Don't contract the last element
std::list<string>::iterator x = i;
if (++x == parts.end()) {
result += *i;
break;
}
if (newlen > width) {
result += string(*i, 0, abbrev_length);
result += ":";
newlen -= (*i).length() - abbrev_length;
} else {
result += *i;
result += ":";
}
}
if (newlen > width) {
// Even abbreviated its too big to show the last account, so
// abbreviate all but the last and truncate at the beginning.
std::strncpy(buf, result.c_str() + (result.length() - width), width);
buf[0] = '.';
buf[1] = '.';
} else {
std::strcpy(buf, result.c_str());
}
break;
}
// fall through...
case TRUNCATE_TRAILING:
// This method truncates at the end (the default).
std::strncpy(buf, str.c_str(), width - 2);
buf[width - 2] = '.';
buf[width - 1] = '.';
break;
}
buf[width] = '\0';
return buf;
}
} // namespace ledger
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