-unsigned int active_nr = 0, active_alloc = 0;
-
-void usage(const char *err)
-{
- fprintf(stderr, "read-tree: %s\n", err);
- exit(1);
-}
-
-static unsigned hexval(char c)
-{
- if (c >= '0' && c <= '9')
- return c - '0';
- if (c >= 'a' && c <= 'f')
- return c - 'a' + 10;
- if (c >= 'A' && c <= 'F')
- return c - 'A' + 10;
- return ~0;
-}
-
-int get_sha1_hex(const char *hex, unsigned char *sha1)
-{
- int i;
- for (i = 0; i < 20; i++) {
- unsigned int val = (hexval(hex[0]) << 4) | hexval(hex[1]);
- if (val & ~0xff)
- return -1;
- *sha1++ = val;
- hex += 2;
- }
- return 0;
-}
-
-char * sha1_to_hex(const unsigned char *sha1)
-{
- static char buffer[50];
- static const char hex[] = "0123456789abcdef";
- char *buf = buffer;
- int i;
-
- for (i = 0; i < 20; i++) {
- unsigned int val = *sha1++;
- *buf++ = hex[val >> 4];
- *buf++ = hex[val & 0xf];
- }
- return buffer;
-}
-
-/*
- * NOTE! This returns a statically allocated buffer, so you have to be
- * careful about using it. Do a "strdup()" if you need to save the
- * filename.
- */
-char *sha1_file_name(unsigned char *sha1)
-{
- int i;
- static char *name, *base;
-
- if (!base) {
- char *sha1_file_directory = getenv(DB_ENVIRONMENT) ? : DEFAULT_DB_ENVIRONMENT;
- int len = strlen(sha1_file_directory);
- base = malloc(len + 60);
- memcpy(base, sha1_file_directory, len);
- memset(base+len, 0, 60);
- base[len] = '/';
- base[len+3] = '/';
- name = base + len + 1;
- }
- for (i = 0; i < 20; i++) {
- static char hex[] = "0123456789abcdef";
- unsigned int val = sha1[i];
- char *pos = name + i*2 + (i > 0);
- *pos++ = hex[val >> 4];
- *pos = hex[val & 0xf];
- }
- return base;
-}
-
-int check_sha1_signature(unsigned char *sha1, void *map, unsigned long size)
-{
- unsigned char real_sha1[20];
- SHA_CTX c;
-
- SHA1_Init(&c);
- SHA1_Update(&c, map, size);
- SHA1_Final(real_sha1, &c);
- return memcmp(sha1, real_sha1, 20) ? -1 : 0;
-}
-
-void *map_sha1_file(unsigned char *sha1, unsigned long *size)
-{
- char *filename = sha1_file_name(sha1);
- int fd = open(filename, O_RDONLY);
- struct stat st;
- void *map;
-
- if (fd < 0) {
- perror(filename);
- return NULL;
- }
- if (fstat(fd, &st) < 0) {
- close(fd);
- return NULL;
- }
- map = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
- close(fd);
- if (-1 == (int)(long)map)
- return NULL;
- *size = st.st_size;
- return map;
-}
-
-void * unpack_sha1_file(void *map, unsigned long mapsize, char *type, unsigned long *size)
-{
- int ret, bytes;
- z_stream stream;
- char buffer[8192];
- char *buf;
-
- /* Get the data stream */
- memset(&stream, 0, sizeof(stream));
- stream.next_in = map;
- stream.avail_in = mapsize;
- stream.next_out = buffer;
- stream.avail_out = sizeof(buffer);
-
- inflateInit(&stream);
- ret = inflate(&stream, 0);
- if (sscanf(buffer, "%10s %lu", type, size) != 2)
- return NULL;
-
- bytes = strlen(buffer) + 1;
- buf = malloc(*size);
- if (!buf)
- return NULL;
-
- memcpy(buf, buffer + bytes, stream.total_out - bytes);
- bytes = stream.total_out - bytes;
- if (bytes < *size && ret == Z_OK) {
- stream.next_out = buf + bytes;
- stream.avail_out = *size - bytes;
- while (inflate(&stream, Z_FINISH) == Z_OK)
- /* nothing */;
- }
- inflateEnd(&stream);
- return buf;
-}
-
-void * read_sha1_file(unsigned char *sha1, char *type, unsigned long *size)
-{
- unsigned long mapsize;
- void *map, *buf;
-
- map = map_sha1_file(sha1, &mapsize);
- if (map) {
- buf = unpack_sha1_file(map, mapsize, type, size);
- munmap(map, mapsize);
- return buf;
- }
- return NULL;
-}
-
-int write_sha1_file(char *buf, unsigned len)
-{
- int size;
- char *compressed;
- z_stream stream;
- unsigned char sha1[20];
- SHA_CTX c;
-
- /* Set it up */
- memset(&stream, 0, sizeof(stream));
- deflateInit(&stream, Z_BEST_COMPRESSION);
- size = deflateBound(&stream, len);
- compressed = malloc(size);
-
- /* Compress it */
- stream.next_in = buf;
- stream.avail_in = len;
- stream.next_out = compressed;
- stream.avail_out = size;
- while (deflate(&stream, Z_FINISH) == Z_OK)
- /* nothing */;
- deflateEnd(&stream);
- size = stream.total_out;
-
- /* Sha1.. */
- SHA1_Init(&c);
- SHA1_Update(&c, compressed, size);
- SHA1_Final(sha1, &c);
-
- if (write_sha1_buffer(sha1, compressed, size) < 0)
- return -1;
- printf("%s\n", sha1_to_hex(sha1));
- return 0;
-}
-
-int write_sha1_buffer(unsigned char *sha1, void *buf, unsigned int size)
-{
- char *filename = sha1_file_name(sha1);
- int fd;
-
- fd = open(filename, O_WRONLY | O_CREAT | O_EXCL, 0666);
- if (fd < 0)
- return (errno == EEXIST) ? 0 : -1;
- write(fd, buf, size);
- close(fd);
- return 0;
-}
-
-static int error(const char * string)
-{
- fprintf(stderr, "error: %s\n", string);
- return -1;
-}