taskwarrior/src/util.cpp
2018-01-15 13:43:34 -05:00

312 lines
8.9 KiB
C++

////////////////////////////////////////////////////////////////////////////////
//
// Copyright 2006 - 2018, Paul Beckingham, Federico Hernandez.
//
// 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.
//
// http://www.opensource.org/licenses/mit-license.php
//
////////////////////////////////////////////////////////////////////////////////
#include <cmake.h>
#include <shared.h>
// If <iostream> is included, put it after <stdio.h>, because it includes
// <stdio.h>, and therefore would ignore the _WITH_GETLINE.
#ifdef FREEBSD
#define _WITH_GETLINE
#endif
#include <stdio.h>
#include <iostream>
#include <fstream>
#include <sstream>
#include <vector>
#include <algorithm>
#include <cstring>
#include <string>
#include <stdint.h>
#include <sys/types.h>
#include <sys/time.h>
#include <sys/wait.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <pwd.h>
#include <signal.h>
#include <sys/select.h>
#include <Lexer.h>
#include <utf8.h>
#include <util.h>
#include <main.h>
#define STRING_UTIL_CONFIRM_YES "yes"
#define STRING_UTIL_CONFIRM_YES_U "Yes"
#define STRING_UTIL_CONFIRM_NO "no"
#define STRING_UTIL_CONFIRM_ALL "all"
#define STRING_UTIL_CONFIRM_ALL_U "All"
#define STRING_UTIL_CONFIRM_QUIT "quit"
extern Context context;
static const char* newline = "\n";
static const char* noline = "";
////////////////////////////////////////////////////////////////////////////////
static void signal_handler (int s)
{
if (s == SIGINT)
{
std::cout << "\n\nInterrupted: No changes made.\n";
exit (1);
}
}
////////////////////////////////////////////////////////////////////////////////
// 0 = no
// 1 = yes
// 2 = all
// 3 = quit
int confirm4 (const std::string& question)
{
std::vector <std::string> options {STRING_UTIL_CONFIRM_YES_U,
STRING_UTIL_CONFIRM_YES,
STRING_UTIL_CONFIRM_NO,
STRING_UTIL_CONFIRM_ALL_U,
STRING_UTIL_CONFIRM_ALL,
STRING_UTIL_CONFIRM_QUIT};
std::vector <std::string> matches;
signal (SIGINT, signal_handler);
do
{
std::cout << question
<< " ("
<< options[1] << '/'
<< options[2] << '/'
<< options[4] << '/'
<< options[5]
<< ") ";
std::string answer {""};
std::getline (std::cin, answer);
context.debug ("STDIN '" + answer + '\'');
answer = std::cin.eof () ? STRING_UTIL_CONFIRM_QUIT : Lexer::lowerCase (Lexer::trim (answer));
autoComplete (answer, options, matches, 1); // Hard-coded 1.
}
while (! std::cin.eof () && matches.size () != 1);
signal (SIGINT, SIG_DFL);
if (matches.size () == 1)
{
if (matches[0] == STRING_UTIL_CONFIRM_YES_U) return 1;
else if (matches[0] == STRING_UTIL_CONFIRM_YES) return 1;
else if (matches[0] == STRING_UTIL_CONFIRM_ALL_U) return 2;
else if (matches[0] == STRING_UTIL_CONFIRM_ALL) return 2;
else if (matches[0] == STRING_UTIL_CONFIRM_QUIT) return 3;
}
return 0;
}
// Handle the generation of UUIDs on FreeBSD in a separate implementation
// of the uuid () function, since the API is quite different from Linux's.
// Also, uuid_unparse_lower is not needed on FreeBSD, because the string
// representation is always lowercase anyway.
// For the implementation details, refer to
// http://svnweb.freebsd.org/base/head/sys/kern/kern_uuid.c
#if defined(FREEBSD) || defined(OPENBSD)
const std::string uuid ()
{
uuid_t id;
uint32_t status;
char *buffer (0);
uuid_create (&id, &status);
uuid_to_string (&id, &buffer, &status);
std::string res (buffer);
free (buffer);
return res;
}
#else
////////////////////////////////////////////////////////////////////////////////
#ifndef HAVE_UUID_UNPARSE_LOWER
// Older versions of libuuid don't have uuid_unparse_lower(), only uuid_unparse()
void uuid_unparse_lower (uuid_t uu, char *out)
{
uuid_unparse (uu, out);
// Characters in out are either 0-9, a-z, '-', or A-Z. A-Z is mapped to
// a-z by bitwise or with 0x20, and the others already have this bit set
for (size_t i = 0; i < 36; ++i) out[i] |= 0x20;
}
#endif
const std::string uuid ()
{
uuid_t id;
uuid_generate (id);
char buffer[100] {};
uuid_unparse_lower (id, buffer);
// Bug found by Steven de Brouwer.
buffer[36] = '\0';
return std::string (buffer);
}
#endif
// Collides with std::numeric_limits methods
#undef max
////////////////////////////////////////////////////////////////////////////////
// Accept a list of projects, and return an indented list that reflects the
// hierarchy.
//
// Input - "one"
// "one.two"
// "one.two.three"
// "one.four"
// "two"
// Output - "one"
// " one.two"
// " one.two.three"
// " one.four"
// "two"
//
// There are two optional arguments, 'whitespace', and 'delimiter',
//
// - whitespace is the string used to build the prefixes of indented items.
// - defaults to two spaces, " "
// - delimiter is the character used to split up projects into subprojects.
// - defaults to the period, '.'
//
const std::string indentProject (
const std::string& project,
const std::string& whitespace /* = " " */,
char delimiter /* = '.' */)
{
// Count the delimiters in *i.
std::string prefix = "";
std::string::size_type pos = 0;
std::string::size_type lastpos = 0;
while ((pos = project.find (delimiter, pos + 1)) != std::string::npos)
{
if (pos != project.size () - 1)
{
prefix += whitespace;
lastpos = pos;
}
}
std::string child = "";
if (lastpos == 0)
child = project;
else
child = project.substr (lastpos + 1);
return prefix + child;
}
////////////////////////////////////////////////////////////////////////////////
const std::vector <std::string> extractParents (
const std::string& project,
const char& delimiter /* = '.' */)
{
std::vector <std::string> vec;
std::string::size_type pos = 0;
std::string::size_type copyUntil = 0;
while ((copyUntil = project.find (delimiter, pos + 1)) != std::string::npos)
{
if (copyUntil != project.size () - 1)
vec.push_back (project.substr (0, copyUntil));
pos = copyUntil;
}
return vec;
}
////////////////////////////////////////////////////////////////////////////////
#ifndef HAVE_TIMEGM
time_t timegm (struct tm *tm)
{
time_t ret;
char *tz;
tz = getenv ("TZ");
setenv ("TZ", "UTC", 1);
tzset ();
ret = mktime (tm);
if (tz)
setenv ("TZ", tz, 1);
else
unsetenv ("TZ");
tzset ();
return ret;
}
#endif
////////////////////////////////////////////////////////////////////////////////
bool nontrivial (const std::string& input)
{
std::string::size_type i = 0;
int character;
while ((character = utf8_next_char (input, i)))
if (! Lexer::isWhitespace (character))
return true;
return false;
}
////////////////////////////////////////////////////////////////////////////////
const char* optionalBlankLine ()
{
return context.verbose ("blank") ? newline : noline;
}
////////////////////////////////////////////////////////////////////////////////
void setHeaderUnderline (Table& table)
{
// If an alternating row color is specified, notify the table.
if (context.color ())
{
Color alternate (context.config.get ("color.alternate"));
table.colorOdd (alternate);
table.intraColorOdd (alternate);
if (context.config.getBoolean ("fontunderline"))
{
table.colorHeader (Color ("underline " + context.config.get ("color.label")));
}
else
{
table.colorHeader (Color (context.config.get ("color.label")));
table.underlineHeaders ();
}
}
else
{
if (context.config.getBoolean ("fontunderline"))
table.colorHeader (Color ("underline"));
else
table.underlineHeaders ();
}
}
////////////////////////////////////////////////////////////////////////////////