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/* See LICENSE file for copyright and license details. */
#include <ctype.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <wchar.h>
#include "arg.h"
char *argv0;
struct result {
ssize_t n;
int width;
};
static void
usage(void)
{
fprintf(stderr, "usage: %s [-s] [file] ...\n", argv0);
exit(1);
}
static ssize_t
count(int fd, const char *fname)
{
char buf[BUFSIZ];
ssize_t i, n, ret = 0;
int beginning = 1;
int escaped = 0;
int slash_asterisk = 0;
int cxx_comment = 0;
int c_comment = 0;
char quote = 0;
for (;;) {
n = read(fd, buf, sizeof(buf));
if (n <= 0) {
if (!n)
break;
fprintf(stderr, "%s: %s: %s\n", argv0, fname, strerror(errno));
return -1;
}
for (i = 0; i < n; i++) {
if (quote) {
if (buf[i] == '\n') {
ret += (ssize_t)!beginning;
beginning = 1;
escaped = 0;
continue;
} else if (escaped) {
escaped = 0;
} else if (buf[i] == quote) {
quote = 0;
} else if (buf[i] == '\\') {
escaped = 1;
}
beginning = 0;
} else if (c_comment) {
if (buf[i] == '\n') {
ret += (ssize_t)!beginning;
beginning = 1;
} else if (buf[i] == '*') {
slash_asterisk = 1;
} else if (slash_asterisk) {
slash_asterisk = 0;
if (buf[i] == '/')
c_comment = 0;
}
} else if (cxx_comment) {
if (escaped) {
escaped = 0;
} else if (buf[i] == '\n') {
ret += (ssize_t)!beginning;
beginning = 1;
cxx_comment = 0;
} else if (buf[i] == '\\') {
escaped = 1;
}
} else if (slash_asterisk && buf[i] == '/') {
cxx_comment = 1;
slash_asterisk = 0;
} else if (slash_asterisk && buf[i] == '*') {
c_comment = 1;
slash_asterisk = 0;
} else {
slash_asterisk = 0;
if (buf[i] == '\n') {
ret += (ssize_t)!beginning;
beginning = 1;
escaped = 0;
} else if (strchr("{}()[]\t\f\r\v; ", buf[i])) {
escaped = 0;
} else if (escaped) {
beginning = 0;
escaped = 0;
} else if (buf[i] == '\'' || buf[i] == '"') {
beginning = 0;
quote = buf[i];
} else if (buf[i] == '/') {
slash_asterisk = 1;
} else if (buf[i] == '\\') {
escaped = 1;
} else {
beginning = 0;
}
}
}
}
return ret + (ssize_t)!beginning;
}
static int
strwidth(const char *str)
{
size_t n = strlen(str) + 1;
wchar_t *wcs = calloc(n, sizeof(*wcs));
int r = -1;
if (!wcs)
fprintf(stderr, "%s: out of memory\n", argv0), exit(1);
if (mbstowcs(wcs, str, n) != (size_t)-1)
r = wcswidth(wcs, n);
free(wcs);
return r < 0 ? (int)(n - 1) : r;
}
static int
zuwidth(size_t num)
{
char buf[3 * sizeof(num) + 1];
return sprintf(buf, "%zu", num);
}
int
main(int argc, char *argv[])
{
ssize_t n, total = 0;
struct result *res;
int i, fd, maxleft = 0, maxright = 0, maxwidth, left, right, ret = 0;
int sum_only = 0;
ARGBEGIN {
case 's':
sum_only = 1;
break;
default:
usage();
} ARGEND;
if (argc < 2) {
if (!argc || !strcmp(argv[0], "-")) {
n = count(STDIN_FILENO, "<stdin>");
} else {
fd = open(argv[0], O_RDONLY);
if (fd < 0)
return 1;
n = count(fd, argv[0]);
close(fd);
}
printf("%zi\n", n);
} else {
if (!(res = calloc(argc, sizeof(struct result))))
fprintf(stderr, "%s: out of memory\n", argv0), exit(1);
for (i = 0; i < argc; i++) {
if (!strcmp(argv[i], "-")) {
res[i].n = count(STDIN_FILENO, "<stdin>");
} else if ((fd = open(argv[i], O_RDONLY)) < 0) {
res[i].n = -1;
} else {
res[i].n = count(fd, argv[i]);
close(fd);
}
if (res[i].n >= 0) {
left = strwidth(argv[i]);
maxleft = left > maxleft ? left : maxleft;
right = zuwidth(res[i].n);
maxright = right > maxright ? right : maxright;
res[i].width = left + right;
}
}
maxwidth = maxleft + maxright;
for (i = 0; i < argc; i++) {
if (res[i].n < 0) {
ret = 1;
} else {
if (!sum_only)
printf("%s:%*s %zi\n", argv[i], maxwidth - res[i].width, "", res[i].n);
total += res[i].n;
}
}
free(res);
printf("%zi\n", total);
}
if (fflush(stdin) || ferror(stdin) || fclose(stdin))
fprintf(stderr, "%s: <stdout>: %s\n", argv0, strerror(errno)), exit(1);
return ret;
}
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