kotovalexarian-likes-gitlab/sortix--sortix
1
0
Fork 0
mirror of https://gitlab.com/sortix/sortix.git synced 2023-02-13 20:55:38 -05:00
Code Releases Activity

Add wc(1).

Browse source
This commit is contained in:
Jonas 'Sortie' Termansen 2013-10-16 22:57:54 +02:00
parent 3e5a6644c8
commit 51d965d6eb
3 changed files with 313 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

1
utils/.gitignore vendored
View file

@ -33,4 +33,5 @@ time
type type
uname uname
uptime uptime
wc
which which

1
utils/Makefile
View file

@ -49,6 +49,7 @@ type \
time \ time \
uname \ uname \
uptime \ uptime \
wc \
which \ which \
INSTALLBINARIES:=$(addprefix $(DESTDIR)$(BINDIR)/,$(BINARIES)) INSTALLBINARIES:=$(addprefix $(DESTDIR)$(BINDIR)/,$(BINARIES))

311
utils/wc.cpp Normal file
View file

@ -0,0 +1,311 @@
/*******************************************************************************
Copyright(C) Jonas 'Sortie' Termansen 2013.
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/>.
wc.cpp
Counts bytes, characters, words and lines.
*******************************************************************************/
#include <sys/stat.h>
#include <sys/types.h>
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <error.h>
#include <locale.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <wchar.h>
#include <wctype.h>
#if !defined(VERSIONSTR)
#define VERSIONSTR "unknown version"
#endif
const int FLAG_PRINT_NUM_BYTES = 1 << 0;
const int FLAG_PRINT_NUM_CHARACTERS = 1 << 1;
const int FLAG_PRINT_NUM_WORDS = 1 << 2;
const int FLAG_PRINT_NUM_LINES = 1 << 3;
const int FLAG_PRINT_COMPACT = 1 << 4;
const int DEFAULT_FLAGS =
FLAG_PRINT_NUM_BYTES | FLAG_PRINT_NUM_WORDS | FLAG_PRINT_NUM_LINES;
struct word_count
{
uintmax_t num_bytes;
uintmax_t num_characters;
uintmax_t num_words;
uintmax_t num_lines;
};
static struct word_count count_words(FILE* fp)
{
struct word_count stats;
memset(&stats, 0, sizeof(stats));
mbstate_t mbstate;
memset(&mbstate, 0, sizeof(mbstate));
bool word_begun = false;
bool line_begun = false;
int ic;
while ( (ic = fgetc(fp)) != EOF )
{
stats.num_bytes++;
char c = (char) ((unsigned char) ic);
wchar_t wc;
size_t num_converted = mbrtowc(&wc, &c, 1, &mbstate);
if ( num_converted == (size_t) -1 )
{
memset(&mbstate, 0, sizeof(mbstate));
continue;
}
if ( num_converted == (size_t) -2 )
continue;
// TODO: Is this strictly speaking needed?
if ( !num_converted )
wc = L'\0';
stats.num_characters++;
word_begun = !iswspace(wc) ||
(word_begun ? (stats.num_words++, false) : false);
line_begun = wc != L'\n' || (stats.num_lines++, false);
}
if ( word_begun )
stats.num_words++;
if ( line_begun )
stats.num_lines++;
return stats;
}
static void print_stat(FILE* fp, uintmax_t value, int flags, int cond)
{
if ( !(flags & cond) )
return;
if ( flags & FLAG_PRINT_COMPACT )
{
fprintf(fp, "%ju", value);
return;
}
if ( value < 100000 )
{
fprintf(fp, "%6ju", value);
return;
}
fprintf(fp, " %ju ", value);
}
static
void print_stats(struct word_count stats, FILE* fp, int flags, const char* path)
{
// TODO: Proper columnization of large values will require knowing all the
// row values in advance - so we'll have to remember the statistics
// for every file we process before printing!
print_stat(fp, stats.num_lines, flags, FLAG_PRINT_NUM_LINES);
print_stat(fp, stats.num_words, flags, FLAG_PRINT_NUM_WORDS);
print_stat(fp, stats.num_bytes, flags, FLAG_PRINT_NUM_BYTES);
print_stat(fp, stats.num_characters, flags, FLAG_PRINT_NUM_CHARACTERS);
if ( path )
fprintf(fp, " %s", path);
fprintf(fp, "\n");
}
static void usage(FILE* fp, const char* argv0)
{
fprintf(fp, "Usage: %s [OPTION]...\n", argv0);
fprintf(fp, "Print newline, word, and byte counts for each FILE, and a total line if\n");
fprintf(fp, "more than one FILE is specified. With no FILE, or when FILE is -,\n");
fprintf(fp, "read standard input. A word is a non-zero-length sequence of characters\n");
fprintf(fp, "delimited by white space.\n");
fprintf(fp, "The options below may be used to select which counts are printed, always in\n");
fprintf(fp, "the following order: newline, word, character, byte.\n");
fprintf(fp, "\n");
fprintf(fp, " -c, --bytes print the byte counts\n");
fprintf(fp, " -m, --chars print the character counts\n");
fprintf(fp, " -l, --lines print the newline counts\n");
fprintf(fp, " -w, --words print the word counts\n");
fprintf(fp, " --help display this help and exit\n");
fprintf(fp, " --usage display this help and exit\n");
fprintf(fp, " --version output version information and exit\n");
}
static void help(FILE* fp, const char* argv0)
{
usage(fp, argv0);
}
static void version(FILE* fp, const char* argv0)
{
fprintf(fp, "%s (Sortix) %s\n", argv0, VERSIONSTR);
fprintf(fp, "License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.\n");
fprintf(fp, "This is free software: you are free to change and redistribute it.\n");
fprintf(fp, "There is NO WARRANTY, to the extent permitted by law.\n");
}
static void compact_arguments(int* argc, char*** argv)
{
for ( int i = 0; i < *argc; i++ )
while ( i < *argc && !(*argv)[i] )
{
for ( int n = i; n < *argc; n++ )
(*argv)[n] = (*argv)[n+1];
(*argc)--;
}
}
bool word_count_file(FILE* fp, const char* path, int flags,
struct word_count* total)
{
struct stat st;
if ( fstat(fileno(fp), &st) == 0 && S_ISDIR(st.st_mode) )
{
struct word_count word_count;
memset(&word_count, 0, sizeof(word_count));
error(0, EISDIR, "`%s'", path);
print_stats(word_count, stdout, flags, path);
return false;
}
struct word_count word_count = count_words(fp);
// TODO: Possible overflow here!
if ( total )
{
total->num_bytes += word_count.num_bytes;
total->num_characters += word_count.num_characters;
total->num_words += word_count.num_words;
total->num_lines += word_count.num_lines;
}
if ( ferror(fp) )
{
error(0, errno, "`%s'", path);
print_stats(word_count, stdout, flags, path);
return false;
}
print_stats(word_count, stdout, flags, path);
return true;
}
int word_count_files(int argc, char* argv[], int flags)
{
if ( argc <= 1 )
return word_count_file(stdin, NULL, flags, NULL);
struct word_count total_count;
memset(&total_count, 0, sizeof(total_count));
bool success = true;
for ( int i = 1; i < argc; i++ )
{
if ( !strcmp(argv[i], "-") )
{
if ( !word_count_file(stdin, "-", flags, NULL) )
success = false;
continue;
}
FILE* fp = fopen(argv[i], "r");
if ( !fp )
{
error(0, errno, "`%s'", argv[i]);
struct word_count word_count;
memset(&word_count, 0, sizeof(word_count));
print_stats(word_count, stdout, flags, argv[i]);
success = false;
continue;
}
if ( !word_count_file(fp, argv[i], flags, &total_count) )
success = false;
fclose(fp);
}
if ( 3 <= argc )
print_stats(total_count, stdout, flags, "total");
return success;
}
int main(int argc, char* argv[])
{
setlocale(LC_ALL, "");
int flags = 0;
const char* argv0 = argv[0];
for ( int i = 0; i < argc; i++ )
{
const char* arg = argv[i];
if ( arg[0] != '-' || !arg[1] )
continue;
argv[i] = NULL;
if ( !strcmp(arg, "--") )
break;
if ( arg[1] != '-' )
{
while ( char c = *++arg ) switch ( c )
{
case 'c': flags |= FLAG_PRINT_NUM_BYTES; break;
case 'l': flags |= FLAG_PRINT_NUM_LINES; break;
case 'm': flags |= FLAG_PRINT_NUM_CHARACTERS; break;
case 'w': flags |= FLAG_PRINT_NUM_WORDS; break;
default:
fprintf(stderr, "%s: unknown option -- '%c'\n", argv0, c);
usage(stderr, argv0);
exit(1);
}
}
else if ( !strcmp(arg, "--help") )
help(stdout, argv0), exit(0);
else if ( !strcmp(arg, "--usage") )
usage(stdout, argv0), exit(0);
else if ( !strcmp(arg, "--version") )
version(stdout, argv0), exit(0);
else if ( !strcmp(arg, "--bytes") )
flags |= FLAG_PRINT_NUM_BYTES;
else if ( !strcmp(arg, "--chars") )
flags |= FLAG_PRINT_NUM_CHARACTERS;
else if ( !strcmp(arg, "--lines") )
flags |= FLAG_PRINT_NUM_LINES;
else if ( !strcmp(arg, "--words") )
flags |= FLAG_PRINT_NUM_WORDS;
else
{
fprintf(stderr, "%s: unknown option: %s\n", argv0, arg);
usage(stderr, argv0);
exit(1);
}
}
compact_arguments(&argc, &argv);
if ( !flags )
flags = DEFAULT_FLAGS;
if ( flags && flags == 1 << (ffs(flags)-1) && argc <= 2 )
flags |= FLAG_PRINT_COMPACT;
return word_count_files(argc, argv, flags) ? 0 : 1;
}