Also got rid of trailing white space. That corrupted .git/. Big ass-commit because of recovered .git directory.
159 lines
3.8 KiB
C++
159 lines
3.8 KiB
C++
/*******************************************************************************
|
|
|
|
COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2012.
|
|
|
|
This program is free software: you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by the Free
|
|
Software Foundation, either version 3 of the License, or (at your option)
|
|
any later version.
|
|
|
|
This program is distributed in the hope that it will be useful, but WITHOUT
|
|
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
|
|
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
|
|
more details.
|
|
|
|
You should have received a copy of the GNU General Public License along with
|
|
this program. If not, see <http://www.gnu.org/licenses/>.
|
|
|
|
cat.cpp
|
|
Columnate lists.
|
|
|
|
*******************************************************************************/
|
|
|
|
#define _SORTIX_SOURCE
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <error.h>
|
|
#include <string.h>
|
|
|
|
int termwidth = 80;
|
|
|
|
size_t linesused = 0;
|
|
size_t lineslength = 0;
|
|
char** lines = 0;
|
|
size_t longestline = 0;
|
|
|
|
bool processline(char* line)
|
|
{
|
|
if ( linesused == lineslength )
|
|
{
|
|
size_t newlineslength = lineslength ? 2 * lineslength : 32;
|
|
char** newlines = new char*[newlineslength];
|
|
memcpy(newlines, lines, sizeof(char*) * linesused);
|
|
delete[] lines;
|
|
lines = newlines;
|
|
lineslength = newlineslength;
|
|
}
|
|
|
|
lines[linesused++] = line;
|
|
size_t linelen = strlen(line);
|
|
if ( longestline < linelen ) { longestline = linelen; }
|
|
return true;
|
|
}
|
|
|
|
bool processfp(const char* inputname, FILE* fp)
|
|
{
|
|
if ( strcmp(inputname, "-") == 0 ) { inputname = "<stdin>"; }
|
|
while ( true )
|
|
{
|
|
size_t linesize;
|
|
char* line = NULL;
|
|
ssize_t linelen = getline(&line, &linesize, fp);
|
|
if ( linelen < 0 )
|
|
{
|
|
if ( feof(fp) ) { return true; }
|
|
error(0, errno, "error reading: %s (%i)", inputname, fileno(fp));
|
|
return false;
|
|
}
|
|
line[--linelen] = 0;
|
|
if ( !processline(line) ) { exit(1); }
|
|
}
|
|
}
|
|
|
|
bool doformat()
|
|
{
|
|
size_t width = termwidth;
|
|
size_t columnwidth = longestline + 2;
|
|
size_t columns = width / columnwidth;
|
|
if ( !columns ) { columns = 1; }
|
|
|
|
bool newline = false;
|
|
for ( size_t i = 0; i < linesused; i++ )
|
|
{
|
|
newline = false;
|
|
size_t column = i % columns;
|
|
size_t offset = column * columnwidth;
|
|
printf("\e[%zuG%s", offset+1, lines[i]);
|
|
if ( columns <= column + 1 ) { printf("\n"); newline = true; }
|
|
}
|
|
if ( linesused && !newline ) { printf("\n"); }
|
|
|
|
return true;
|
|
}
|
|
|
|
void usage(const char* argv0)
|
|
{
|
|
printf("usage: %s [--help | --version | --usage] [-c width] [<FILE> ...]\n", argv0);
|
|
}
|
|
|
|
void help(const char* argv0)
|
|
{
|
|
usage(argv0);
|
|
}
|
|
|
|
void version(const char* argv0)
|
|
{
|
|
printf("%s (sortix)\n", argv0);
|
|
}
|
|
|
|
int main(int argc, char* argv[])
|
|
{
|
|
const char* argv0 = argv[0];
|
|
|
|
for ( int i = 1; i < argc; i++ )
|
|
{
|
|
const char* arg = argv[i];
|
|
if ( arg[0] != '-' ) { continue; }
|
|
if ( strcmp(arg, "-") == 0 ) { continue; }
|
|
argv[i] = NULL;
|
|
if ( strcmp(arg, "--") == 0 ) { break; }
|
|
if ( strcmp(arg, "--usage") == 0 ) { usage(argv0); exit(0); }
|
|
if ( strcmp(arg, "--help") == 0 ) { help(argv0); exit(0); }
|
|
if ( strcmp(arg, "--version") == 0 ) { version(argv0); exit(0); }
|
|
if ( strcmp(arg, "-c") == 0 )
|
|
{
|
|
if ( i+1 == argc ) { usage(argv0); exit(1); }
|
|
termwidth = atoi(argv[++i]); argv[i] = NULL;
|
|
continue;
|
|
}
|
|
error(0, 0, "unknown option %s", arg);
|
|
usage(argv0);
|
|
return 1;
|
|
}
|
|
|
|
bool hadany = false;
|
|
for ( int i = 1; i < argc; i++ )
|
|
{
|
|
const char* arg = argv[i];
|
|
if ( !arg ) { continue; }
|
|
bool isstdin = strcmp(arg, "-") == 0;
|
|
FILE* fp = isstdin ? stdin : fopen(arg, "r");
|
|
if ( !fp ) { error(1, errno, "fopen failed: %s", arg); }
|
|
hadany = true;
|
|
if ( !processfp(arg, fp) ) { return 1; }
|
|
if ( fp != stdin ) { fclose(fp); }
|
|
}
|
|
|
|
if ( !hadany )
|
|
{
|
|
if ( !processfp("-", stdin) ) { return 1; }
|
|
}
|
|
|
|
if ( !doformat() ) { exit(1); }
|
|
return 0;
|
|
}
|
|
|