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Reorg

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This commit is contained in:
Dave Vasilevsky 2010-10-13 22:42:54 -04:00
parent 7fb3234f93
commit 29d1bfeb36
1 changed files with 71 additions and 63 deletions
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134
pread.c
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@ -47,6 +47,18 @@ static void read_thread(void);
static void decode_thread(size_t thnum);
#pragma mark DECLARE ARCHIVE
static pipeline_item_t *gArItem = NULL, *gArLastItem = NULL;
static size_t gArLastOffset, gArLastSize;
static wanted_t *gArWanted = NULL;
static bool gArNextItem = false;
static int tar_ok(struct archive *ar, void *ref);
static ssize_t tar_read(struct archive *ar, void *ref, const void **bufp);
static bool tar_next_block(void);
#pragma mark DECLARE UTILS
static FILE *gOutFile;
@ -58,69 +70,6 @@ static void set_block_sizes(void);
#pragma mark MAIN
static int tar_ok(struct archive *ar, void *ref) {
return ARCHIVE_OK;
}
static pipeline_item_t *gArItem = NULL, *gArLastItem = NULL;
static size_t gArLastOffset, gArLastSize;
static wanted_t *gArWanted = NULL;
static bool gArNextItem = false;
static bool tar_next_block(void) {
if (gArItem && !gArNextItem && gArWanted) {
io_block_t *ib = (io_block_t*)(gArItem->data);
if (gArWanted->start < ib->uoffset + ib->outsize)
return true; // No need
}
if (gArLastItem)
queue_push(gPipelineStartQ, PIPELINE_ITEM, gArLastItem);
gArLastItem = gArItem;
gArItem = pipeline_merged();
gArNextItem = false;
return gArItem;
}
static ssize_t tar_read(struct archive *ar, void *ref, const void **bufp) {
// If we got here, the last bit of archive is ok to write
if (gArItem) {
io_block_t *ib = (io_block_t*)(gArItem->data);
fwrite(ib->output + gArLastOffset, gArLastSize, 1, gOutFile);
}
// TODO: don't assume we have wanted files!!!
// Write the first wanted file
if (!tar_next_block())
return 0;
size_t off, size;
io_block_t *ib = (io_block_t*)(gArItem->data);
if (gWantedFiles) {
off = gArWanted->start - ib->uoffset;
size = gArWanted->size;
if (off < 0) {
size += off;
off = 0;
}
if (off + size > ib->outsize) {
size = ib->outsize - off;
gArNextItem = true; // force the end of this block
} else {
gArWanted = gArWanted->next;
}
} else {
off = 0;
size = ib->outsize;
}
gArLastOffset = off;
gArLastSize = size;
*bufp = ib->output + off;
return size;
}
int main(int argc, char **argv) {
gInFile = stdin;
gOutFile = stdout;
@ -378,3 +327,62 @@ static void decode_thread(size_t thnum) {
}
lzma_end(&stream);
}
#pragma mark ARCHIVE
static int tar_ok(struct archive *ar, void *ref) {
return ARCHIVE_OK;
}
static bool tar_next_block(void) {
if (gArItem && !gArNextItem && gArWanted) {
io_block_t *ib = (io_block_t*)(gArItem->data);
if (gArWanted->start < ib->uoffset + ib->outsize)
return true; // No need
}
if (gArLastItem)
queue_push(gPipelineStartQ, PIPELINE_ITEM, gArLastItem);
gArLastItem = gArItem;
gArItem = pipeline_merged();
gArNextItem = false;
return gArItem;
}
static ssize_t tar_read(struct archive *ar, void *ref, const void **bufp) {
// If we got here, the last bit of archive is ok to write
if (gArItem) {
io_block_t *ib = (io_block_t*)(gArItem->data);
fwrite(ib->output + gArLastOffset, gArLastSize, 1, gOutFile);
}
// Write the first wanted file
if (!tar_next_block())
return 0;
size_t off, size;
io_block_t *ib = (io_block_t*)(gArItem->data);
if (gWantedFiles) {
off = gArWanted->start - ib->uoffset;
size = gArWanted->size;
if (off < 0) {
size += off;
off = 0;
}
if (off + size > ib->outsize) {
size = ib->outsize - off;
gArNextItem = true; // force the end of this block
} else {
gArWanted = gArWanted->next;
}
} else {
off = 0;
size = ib->outsize;
}
gArLastOffset = off;
gArLastSize = size;
*bufp = ib->output + off;
return size;
}