2 * Generating Objects from Buckets
4 * (c) 2004, Robert Spalek <robert@ucw.cz>
5 * (c) 2004, Martin Mares <mj@ucw.cz>
9 #include "lib/unaligned.h"
10 #include "lib/mempool.h"
11 #include "lib/fastbuf.h"
12 #include "lib/unicode.h"
13 #include "lib/object.h"
14 #include "lib/bucket.h"
15 #include "lib/lizard.h"
22 #define RET_ERR(num) ({ errno = num; return -1; })
27 struct lizard_buffer *lizard;
33 struct buck2obj_buf *buf = xmalloc(sizeof(struct buck2obj_buf));
35 buf->lizard = lizard_alloc();
40 buck2obj_free(struct buck2obj_buf *buf)
42 lizard_free(buf->lizard);
48 decode_attributes(byte *ptr, byte *end, struct odes *o, uns can_overwrite)
50 if (can_overwrite >= 2)
60 obj_add_attr_ref(o, type, ptr);
73 byte *dup = mp_alloc_fast_noalign(o->pool, len+1);
74 memcpy(dup, ptr, len);
76 obj_add_attr_ref(o, type, dup);
84 buck2obj_parse(struct buck2obj_buf *buf, uns buck_type, uns buck_len, struct fastbuf *body, struct odes *o_hdr, uns *body_start, struct odes *o_body)
86 if (buck_type == BUCKET_TYPE_PLAIN)
90 obj_read_multi(body, o_hdr); // ignore empty lines, read until EOF or NUL
92 else if (buck_type == BUCKET_TYPE_V30)
94 sh_off_t start = btell(body);
95 sh_off_t end = start + buck_len;
96 byte buf[MAX_ATTR_SIZE];
97 while (btell(body) < end && bgets(body, buf, sizeof(buf)) && buf[0])
98 obj_add_attr(o_hdr, buf[0], buf+1);
100 *body_start = btell(body) - start;
103 while (btell(body) < end && bgets(body, buf, sizeof(buf)))
105 obj_add_attr(o_hdr, buf[0], buf+1);
106 ASSERT(btell(body) == end);
109 else if (buck_type == BUCKET_TYPE_V33 || buck_type == BUCKET_TYPE_V33_LIZARD)
111 /* Read all the bucket into 1 buffer, 0-copy if possible. */
113 uns len = bdirect_read_prepare(body, &ptr);
116 || (body->can_overwrite_buffer < 2 && buck_type == BUCKET_TYPE_V33))
118 /* Copy if the original buffer is too small.
119 * If it is write-protected, copy it also if it is uncompressed. */
120 bb_grow(&buf->bb, buck_len);
121 len = bread(body, buf->bb.ptr, buck_len);
128 ptr = decode_attributes(ptr, end, o_hdr, 0); // header
131 *body_start = ptr - start;
133 bdirect_read_commit(body, ptr);
136 if (buck_type == BUCKET_TYPE_V33_LIZARD) // decompression
142 uns adler = GET_U32(ptr);
144 byte *new_ptr = lizard_decompress_safe(ptr, buf->lizard, len);
147 if (adler32(new_ptr, len) != adler)
150 bdirect_read_commit(body, end);
155 ptr = decode_attributes(ptr, end, o_body, 2); // body
159 bdirect_read_commit_modified(body, ptr);
167 obj_read_bucket(struct buck2obj_buf *buf, struct mempool *pool, uns buck_type, uns buck_len, struct fastbuf *body, uns *body_start)
169 struct odes *o = obj_new(pool);
170 if (buck2obj_parse(buf, buck_type, buck_len, body, o, body_start, o) < 0)
177 obj_read(struct fastbuf *f, struct odes *o)
179 byte buf[MAX_ATTR_SIZE];
181 while (bgets(f, buf, sizeof(buf)))
185 obj_add_attr(o, buf[0], buf+1);
191 obj_read_multi(struct fastbuf *f, struct odes *o)
193 /* Read a multi-part object ending with either EOF or a NUL character */
194 byte buf[MAX_ATTR_SIZE];
195 while (bpeekc(f) > 0 && bgets(f, buf, sizeof(buf)))
197 obj_add_attr(o, buf[0], buf+1);