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finish load table

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This commit is contained in:
源文雨
2022-05-03 23:45:45 +08:00
parent fae3641fab
commit ef435631cb
7 changed files with 110 additions and 25 deletions
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22
src/page.c
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@@ -30,7 +30,7 @@ void* alloc_page(int fd, void* page) {
if(write(fd, buf, 8) != 8) return NULL; // 从空闲块链表移除本块
return page;
}
if(prev_prev_ptr && ptr < prev_ptr) { // 不符合顺序，进行一次调整
if(prev_prev_ptr && ptr < prev_ptr && ptr != 8) { // 不符合顺序，进行一次调整
lseek(fd, prev_prev_ptr, SEEK_SET);
putle64(buf, ptr);
if(write(fd, buf, 8) != 8) return NULL; // 1->next = 3
@@ -87,7 +87,7 @@ int free_page(int fd, void* page) {
errno = ESPIPE;
return EOF;
}
if(prev_prev_ptr && ptr < prev_ptr) { // 不符合顺序，进行一次调整
if(prev_prev_ptr && ptr < prev_ptr && ptr != 8) { // 不符合顺序，进行一次调整
lseek(fd, prev_prev_ptr, SEEK_SET);
putle64(buf, ptr);
if(write(fd, buf, 8) != 8) return EOF; // 1->next = 3
@@ -140,7 +140,11 @@ void* alloc_block(int fd, uint16_t size, void* blk) {
errno = ESPIPE;
return NULL;
}
readle16(fd, blksz);
if(ptr == 8) blksz = 0;
else readle16(fd, blksz);
#ifdef DEBUG
printf("ptr: %016llx, blksize: %d\n", ptr, blksz);
#endif
if(blksz >= size) { // 找到符合要求的块
if(blksz - size > 10) { // 分裂块
lseek(fd, ptr+size, SEEK_SET);
@@ -152,6 +156,9 @@ void* alloc_block(int fd, uint16_t size, void* blk) {
}
putle64(blk, ptr);
putle16(blk+8, size);
#ifdef DEBUG
printf("find match: ptr: %016llx, size: %d\n", ptr, size);
#endif
blk += 10;
if(lseek(fd, prev_ptr, SEEK_SET) < 0) return NULL;
if(write(fd, buf, 8) != 8) { // 从空闲块链表移除本块
@@ -160,7 +167,7 @@ void* alloc_block(int fd, uint16_t size, void* blk) {
}
return blk;
}
if(prev_prev_ptr && ptr < prev_ptr) { // 不符合顺序，进行一次调整
if(prev_prev_ptr && ptr < prev_ptr && ptr != 8) { // 不符合顺序，进行一次调整
lseek(fd, prev_prev_ptr, SEEK_SET);
putle64(buf, ptr);
if(write(fd, buf, 8) != 8) return NULL; // 1->next = 3
@@ -221,6 +228,9 @@ int sync_block(int fd, void* blk) {
errno = EFBIG;
return EOF;
}
#ifdef DEBUG
printf("off: %016llx, size: %d\n", off, size);
#endif
if(lseek(fd, off, SEEK_SET) < 0) return EOF;
return write(fd, blk, size) != size;
}
@@ -235,7 +245,7 @@ int free_block(int fd, void* blk) {
errno = ESPIPE;
return EOF;
}
if(prev_prev_ptr && ptr < prev_ptr) { // 不符合顺序，进行一次调整
if(prev_prev_ptr && ptr < prev_ptr && ptr != 8) { // 不符合顺序，进行一次调整
lseek(fd, prev_prev_ptr, SEEK_SET);
putle64(buf, ptr);
if(write(fd, buf, 8) != 8) return EOF; // 1->next = 3
@@ -288,7 +298,7 @@ int add_block(int fd, uint16_t size, uint64_t off) {
errno = ESPIPE;
return EOF;
}
if(prev_prev_ptr && ptr < prev_ptr) { // 不符合顺序，进行一次调整
if(prev_prev_ptr && ptr < prev_ptr && ptr != 8) { // 不符合顺序，进行一次调整
lseek(fd, prev_prev_ptr, SEEK_SET);
putle64(buf, ptr);
if(write(fd, buf, 8) != 8) return EOF; // 1->next = 3