static int check_offset_overflow(off_t offset, uintmax_t len)
{
#if 0
if (len > maximum_signed_value_of_type(off_t))
return error("unrepresentable length in delta: "
"%"PRIuMAX" > OFF_MAX", len);
if (signed_add_overflows(offset, (off_t) len))
return error("unrepresentable offset in delta: "
"%"PRIuMAX" + %"PRIuMAX" > OFF_MAX",
(uintmax_t) offset, len);
#endif
if (offset > (INT64_MAX/2) || len > (INT64_MAX/2)) {
printf("Overflow or close enough.\n");
return -1;
}
return 0;
}
static int parse_cat_response_line(const char *header, off_t *len)
{
uintmax_t n;
const char *type;
const char *end;
if (ends_with(header, " missing"))
return error("cat-blob reports missing blob: %s", header);
type = strstr(header, " blob ");
if (!type)
return error("cat-blob header has wrong object type: %s", header);
n = strtoumax(type + strlen(" blob "), (char **) &end, 10);
if (end == type + strlen(" blob "))
return error("cat-blob header does not contain length: %s", header);
if (memchr(type + strlen(" blob "), '-', end - type - strlen(" blob ")))
return error("cat-blob header contains negative length: %s", header);
if (n == UINTMAX_MAX || n > maximum_signed_value_of_type(off_t))
return error("blob too large for current definition of off_t");
*len = n;
if (*end)
return error("cat-blob header contains garbage after length: %s", header);
return 0;
}
static curl_off_t xcurl_off_t(ssize_t len) {
if (len > maximum_signed_value_of_type(curl_off_t))
die("cannot handle pushes this big");
return (curl_off_t) len;
}
void svndump_read(const char *url)
{
char *val;
char *t;
uint32_t active_ctx = DUMP_CTX;
uint32_t len;
reset_dump_ctx(url);
while ((t = buffer_read_line(&input))) {
val = strchr(t, ':');
if (!val)
continue;
val++;
if (*val != ' ')
continue;
val++;
/* strlen(key) + 1 */
switch (val - t - 1) {
case sizeof("SVN-fs-dump-format-version"):
if (constcmp(t, "SVN-fs-dump-format-version"))
continue;
dump_ctx.version = atoi(val);
if (dump_ctx.version > 3)
die("expected svn dump format version <= 3, found %"PRIu32,
dump_ctx.version);
break;
case sizeof("UUID"):
if (constcmp(t, "UUID"))
continue;
strbuf_reset(&dump_ctx.uuid);
strbuf_addstr(&dump_ctx.uuid, val);
break;
case sizeof("Revision-number"):
if (constcmp(t, "Revision-number"))
continue;
if (active_ctx == NODE_CTX)
handle_node();
if (active_ctx == REV_CTX)
begin_revision();
if (active_ctx != DUMP_CTX)
end_revision();
active_ctx = REV_CTX;
reset_rev_ctx(atoi(val));
break;
case sizeof("Node-path"):
if (prefixcmp(t, "Node-"))
continue;
if (!constcmp(t + strlen("Node-"), "path")) {
if (active_ctx == NODE_CTX)
handle_node();
if (active_ctx == REV_CTX)
begin_revision();
active_ctx = NODE_CTX;
reset_node_ctx(val);
break;
}
if (constcmp(t + strlen("Node-"), "kind"))
continue;
if (!strcmp(val, "dir"))
node_ctx.type = REPO_MODE_DIR;
else if (!strcmp(val, "file"))
node_ctx.type = REPO_MODE_BLB;
else
fprintf(stderr, "Unknown node-kind: %s\n", val);
break;
case sizeof("Node-action"):
if (constcmp(t, "Node-action"))
continue;
if (!strcmp(val, "delete")) {
node_ctx.action = NODEACT_DELETE;
} else if (!strcmp(val, "add")) {
node_ctx.action = NODEACT_ADD;
} else if (!strcmp(val, "change")) {
node_ctx.action = NODEACT_CHANGE;
} else if (!strcmp(val, "replace")) {
node_ctx.action = NODEACT_REPLACE;
} else {
fprintf(stderr, "Unknown node-action: %s\n", val);
node_ctx.action = NODEACT_UNKNOWN;
}
break;
case sizeof("Node-copyfrom-path"):
if (constcmp(t, "Node-copyfrom-path"))
continue;
strbuf_reset(&node_ctx.src);
strbuf_addstr(&node_ctx.src, val);
break;
case sizeof("Node-copyfrom-rev"):
if (constcmp(t, "Node-copyfrom-rev"))
continue;
node_ctx.srcRev = atoi(val);
break;
case sizeof("Text-content-length"):
if (!constcmp(t, "Text-content-length")) {
char *end;
uintmax_t textlen;
textlen = strtoumax(val, &end, 10);
if (!isdigit(*val) || *end)
die("invalid dump: non-numeric length %s", val);
if (textlen > maximum_signed_value_of_type(off_t))
die("unrepresentable length in dump: %s", val);
node_ctx.text_length = (off_t) textlen;
break;
}
if (constcmp(t, "Prop-content-length"))
continue;
node_ctx.propLength = atoi(val);
break;
case sizeof("Text-delta"):
if (!constcmp(t, "Text-delta")) {
node_ctx.text_delta = !strcmp(val, "true");
break;
}
if (constcmp(t, "Prop-delta"))
continue;
node_ctx.prop_delta = !strcmp(val, "true");
break;
case sizeof("Content-length"):
if (constcmp(t, "Content-length"))
continue;
len = atoi(val);
t = buffer_read_line(&input);
if (!t)
die_short_read();
if (*t)
die("invalid dump: expected blank line after content length header");
if (active_ctx == REV_CTX) {
read_props();
} else if (active_ctx == NODE_CTX) {
handle_node();
active_ctx = INTERNODE_CTX;
} else {
fprintf(stderr, "Unexpected content length header: %"PRIu32"\n", len);
if (buffer_skip_bytes(&input, len) != len)
die_short_read();
}
}
}
if (buffer_ferror(&input))
die_short_read();
if (active_ctx == NODE_CTX)
handle_node();
if (active_ctx == REV_CTX)
begin_revision();
if (active_ctx != DUMP_CTX)
end_revision();
}
