stephenseo/SimpleArchiver
1
0
Fork 0
Code Issues 1 Pull requests Projects 1 Releases 8 Packages Wiki Activity Actions

Impl. more robust compression

Browse source
This commit is contained in:
Stephen Seo 2024-10-07 12:08:38 +09:00
parent 1a16c2c3bb
commit f26509f227
1 changed files with 97 additions and 43 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

96
src/archiver.c
View file

@ -1389,7 +1389,7 @@ void simple_archiver_internal_cleanup_int_fd(int *fd) {
#if SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_COSMOPOLITAN || \
SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_MAC || \
SIMPLE_ARCHIVER_PLATFORM == SIMPLE_ARCHIVER_PLATFORM_LINUX
void simple_archiver_internal_cleanup_decomp(pid_t *decomp_pid) {
void simple_archiver_internal_cleanup_decomp_pid(pid_t *decomp_pid) {
if (decomp_pid && *decomp_pid >= 0) {
int decompressor_status;
int decompressor_return_val;
@ -2215,7 +2215,9 @@ int simple_archiver_write_v1(FILE *out_f, SDArchiverState *state,
int pipe_into_cmd[2];
int pipe_outof_cmd[2];
pid_t compressor_pid;
__attribute__((cleanup(
simple_archiver_internal_cleanup_decomp_pid))) pid_t compressor_pid =
-1;
if (pipe(pipe_into_cmd) != 0) {
// Unable to create pipes.
@ -2225,6 +2227,20 @@ int simple_archiver_write_v1(FILE *out_f, SDArchiverState *state,
close(pipe_into_cmd[0]);
close(pipe_into_cmd[1]);
return SDAS_INTERNAL_ERROR;
} else if (fcntl(pipe_into_cmd[1], F_SETFL, O_NONBLOCK) != 0) {
// Unable to set non-blocking on into-write-pipe.
close(pipe_into_cmd[0]);
close(pipe_into_cmd[1]);
close(pipe_outof_cmd[0]);
close(pipe_outof_cmd[1]);
return SDAS_INTERNAL_ERROR;
} else if (fcntl(pipe_outof_cmd[0], F_SETFL, O_NONBLOCK) != 0) {
// Unable to set non-blocking on outof-read-pipe.
close(pipe_into_cmd[0]);
close(pipe_into_cmd[1]);
close(pipe_outof_cmd[0]);
close(pipe_outof_cmd[1]);
return SDAS_INTERNAL_ERROR;
} else if (simple_archiver_de_compress(pipe_into_cmd, pipe_outof_cmd,
state->parsed->compressor,
&compressor_pid) != 0) {
@ -2241,13 +2257,14 @@ int simple_archiver_write_v1(FILE *out_f, SDArchiverState *state,
close(pipe_outof_cmd[1]);
// Set up cleanup so that remaining open pipes in this side is cleaned up.
__attribute__((cleanup(
simple_archiver_internal_cleanup_int_fd))) int pipe_into_write =
pipe_into_cmd[1];
__attribute__((cleanup(
simple_archiver_internal_cleanup_int_fd))) int pipe_outof_read =
pipe_outof_cmd[0];
__attribute__((cleanup(
simple_archiver_internal_cleanup_int_fd))) int pipe_into_write =
pipe_into_cmd[1];
int_fast8_t to_temp_finished = 0;
for (uint64_t file_idx = 0; file_idx < *((uint64_t *)chunk_c_node->data);
++file_idx) {
file_node = file_node->next;
@ -2257,7 +2274,11 @@ int simple_archiver_write_v1(FILE *out_f, SDArchiverState *state,
const SDArchiverInternalFileInfo *file_info_struct = file_node->data;
__attribute__((cleanup(simple_archiver_helper_cleanup_FILE))) FILE *fd =
fopen(file_info_struct->filename, "rb");
while (!feof(fd)) {
int_fast8_t to_comp_finished = 0;
while (!to_comp_finished) {
if (!to_comp_finished) {
// Write to compressor.
if (ferror(fd)) {
fprintf(stderr, "ERROR: Writing to chunk, file read error!\n");
return SDAS_INTERNAL_ERROR;
@ -2266,27 +2287,65 @@ int simple_archiver_write_v1(FILE *out_f, SDArchiverState *state,
if (fread_ret > 0) {
ssize_t write_ret = write(pipe_into_write, buf, fread_ret);
if (write_ret < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
// Non-blocking write.
} else {
fprintf(stderr,
"ERROR: Writing to compressor, pipe write error!\n");
return SDAS_FAILED_TO_WRITE;
}
} else if ((size_t)write_ret != fread_ret) {
fprintf(stderr,
fprintf(
stderr,
"ERROR: Writing to compressor, unable to write bytes!\n");
return SDAS_FAILED_TO_WRITE;
}
}
if (feof(fd)) {
to_comp_finished = 1;
}
}
// Close write to pipe to compressor as the chunk is written.
simple_archiver_internal_cleanup_int_fd(&pipe_into_write);
// Read compressed data into temporary file.
do {
// Write compressed data to temp file.
ssize_t read_ret = read(pipe_outof_read, buf, 1024);
if (read_ret < 0) {
fprintf(stderr, "ERROR: Reading from compressor, pipe read error!\n");
if (errno == EAGAIN || errno == EWOULDBLOCK) {
// Non-blocking read.
} else {
fprintf(stderr,
"ERROR: Reading from compressor, pipe read error!\n");
return SDAS_INTERNAL_ERROR;
}
} else if (read_ret == 0) {
// EOF.
to_temp_finished = 1;
} else {
size_t fwrite_ret = fwrite(buf, 1, (size_t)read_ret, temp_fd);
if (fwrite_ret != (size_t)read_ret) {
fprintf(stderr,
"ERROR: Reading from compressor, failed to write to "
"temporary file!\n");
return SDAS_INTERNAL_ERROR;
}
}
}
}
simple_archiver_internal_cleanup_int_fd(&pipe_into_write);
// Finish writing.
if (!to_temp_finished) {
while (1) {
ssize_t read_ret = read(pipe_outof_read, buf, 1024);
if (read_ret < 0) {
if (errno == EAGAIN || errno == EWOULDBLOCK) {
// Non-blocking read.
} else {
fprintf(stderr,
"ERROR: Reading from compressor, pipe read error!\n");
return SDAS_INTERNAL_ERROR;
}
} else if (read_ret == 0) {
// EOF.
break;
@ -2299,13 +2358,8 @@ int simple_archiver_write_v1(FILE *out_f, SDArchiverState *state,
return SDAS_INTERNAL_ERROR;
}
}
} while (1);
// Close read from pipe from compressor as chunk is fully compressed.
simple_archiver_internal_cleanup_int_fd(&pipe_outof_read);
// Wait on compressor to stop.
waitpid(compressor_pid, NULL, 0);
}
}
long comp_chunk_size = ftell(temp_fd);
if (comp_chunk_size < 0) {
@ -3661,7 +3715,7 @@ int simple_archiver_parse_archive_version_1(FILE *in_f, int_fast8_t do_extract,
int pipe_into_cmd[2];
int pipe_outof_cmd[2];
__attribute__((cleanup(
simple_archiver_internal_cleanup_decomp))) pid_t decompressor_pid;
simple_archiver_internal_cleanup_decomp_pid))) pid_t decompressor_pid;
if (pipe(pipe_into_cmd) != 0) {
// Unable to create pipes.
break;