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vorking vlad's

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pajjilykk
2025-10-06 17:36:30 +07:00
parent 45e993fbfb
commit 462b987abd
9 changed files with 32 additions and 26 deletions
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lab_1/ilya`s/1/file.in → lab_1/ilya`s/file.in
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lab_1/ilya`s/1/file.out → lab_1/ilya`s/file.out
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lab_1/ilya`s/1/signs → lab_1/ilya`s/signs
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lab_1/ilya`s/1/signs.cpp → lab_1/ilya`s/signs.cpp
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lab_1/kirill`s/lab1/in.txt → lab_1/kirill`s/in.txt
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lab_1/kirill`s/lab1/task18.cpp → lab_1/kirill`s/task18.cpp
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8
lab_1/vlad`s/in.txt Normal file
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@@ -0,0 +1,8 @@
aaaaaa
aaaaaaaaaaaa
aaaaaaaaaaaa
aaaaaaaaaaaa
2
aaaaaaaaaaaa
aaaaaaaaaaaa
aaaaaa

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lab_1/vlad`s/lab1/in.txt
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@@ -1,2 +0,0 @@
aaaaaa
aaaaaa

48
lab_1/vlad`s/lab1/task11.cpp → lab_1/vlad`s/task11.c
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@@ -12,12 +12,13 @@
static void die_perror(const char *what, const char *path, int exit_code) {
int saved = errno;
char msg[512];
int n;
if (path) {
snprintf(msg, sizeof(msg), "%s: %s: %s\n", what, path, strerror(saved));
n = snprintf(msg, sizeof(msg), "%s: %s: %s\n", what, path, strerror(saved));
} else {
snprintf(msg, sizeof(msg), "%s: %s\n", what, strerror(saved));
n = snprintf(msg, sizeof(msg), "%s: %s\n", what, strerror(saved));
}
(void) write(STDERR_FILENO, msg, strlen(msg));
if (n > 0) (void) write(STDERR_FILENO, msg, (size_t) n);
_exit(exit_code);
}
@@ -32,6 +33,18 @@ static long long parse_ll(const char *s) {
return v;
}
static void xwrite_all(int fd, const char *buf, size_t len, const char *path) {
size_t off = 0;
while (off < len) {
ssize_t n = write(fd, buf + off, len - off);
if (n < 0) {
if (errno == EINTR) continue;
die_perror("write failed", path, -1);
}
off += (size_t) n;
}
}
int main(int argc, char *argv[]) {
if (argc != 4) {
const char *usage =
@@ -54,7 +67,7 @@ int main(int argc, char *argv[]) {
die_perror("open input failed", in_path, -1);
}
mode_t filePerms = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH; /* rw-rw-rw- */
mode_t filePerms = S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP | S_IROTH | S_IWOTH;
int out_fd = open(out_path, O_CREAT | O_WRONLY | O_TRUNC, filePerms);
if (out_fd < 0) {
die_perror("open output failed", out_path, -1);
@@ -64,7 +77,6 @@ int main(int argc, char *argv[]) {
char wbuf[WBUFSZ];
size_t wlen = 0;
/* state */
long long total_replacements = 0;
int replacing_enabled = 1;
@@ -78,14 +90,12 @@ int main(int argc, char *argv[]) {
unsigned char c = (unsigned char) rbuf[i];
if (!have_prev) {
/* buffer first byte of a potential pair */
prev = c;
have_prev = 1;
continue;
}
if (c == prev) {
/* non-overlapping pair found: output prev, then second element possibly replaced */
unsigned char out1 = prev;
unsigned char out2 = c;
@@ -99,29 +109,22 @@ int main(int argc, char *argv[]) {
replacing_enabled = 0;
}
/* write out1 */
if (wlen == sizeof(wbuf)) {
ssize_t wrote = write(out_fd, wbuf, wlen);
if (wrote < 0 || (size_t) wrote != wlen) die_perror("write failed", out_path, -1);
xwrite_all(out_fd, wbuf, wlen, out_path);
wlen = 0;
}
wbuf[wlen++] = (char) out1;
/* write out2 */
if (wlen == sizeof(wbuf)) {
ssize_t wrote = write(out_fd, wbuf, wlen);
if (wrote < 0 || (size_t) wrote != wlen) die_perror("write failed", out_path, -1);
xwrite_all(out_fd, wbuf, wlen, out_path);
wlen = 0;
}
wbuf[wlen++] = (char) out2;
/* consume pair: reset have_prev so next byte starts a new potential pair */
have_prev = 0;
} else {
/* no pair: output prev, shift window to c */
if (wlen == sizeof(wbuf)) {
ssize_t wrote = write(out_fd, wbuf, wlen);
if (wrote < 0 || (size_t) wrote != wlen) die_perror("write failed", out_path, -1);
xwrite_all(out_fd, wbuf, wlen, out_path);
wlen = 0;
}
wbuf[wlen++] = (char) prev;
@@ -131,23 +134,21 @@ int main(int argc, char *argv[]) {
}
}
} else if (n == 0) {
/* flush any pending single prev */
if (have_prev) {
if (wlen == sizeof(wbuf)) {
ssize_t wrote = write(out_fd, wbuf, wlen);
if (wrote < 0 || (size_t) wrote != wlen) die_perror("write failed", out_path, -1);
xwrite_all(out_fd, wbuf, wlen, out_path);
wlen = 0;
}
wbuf[wlen++] = (char) prev;
have_prev = 0;
}
if (wlen > 0) {
ssize_t wrote = write(out_fd, wbuf, wlen);
if (wrote < 0 || (size_t) wrote != wlen) die_perror("write failed", out_path, -1);
xwrite_all(out_fd, wbuf, wlen, out_path);
wlen = 0;
}
break;
} else {
if (errno == EINTR) continue;
die_perror("read failed", in_path, -1);
}
}
@@ -165,6 +166,5 @@ int main(int argc, char *argv[]) {
(void) write(STDOUT_FILENO, res, (size_t) m);
}
int exit_code = (int) (total_replacements & 0xFF);
return exit_code;
return 0;
}