static void copystream(fz_obj *obj, int num, int gen)
{
fz_error error;
fz_buffer *buf, *tmp;
fz_obj *newlen;
error = pdf_load_raw_stream(&buf, xref, num, gen);
if (error)
die(error);
if (doascii && isbinarystream(buf))
{
tmp = hexbuf(buf->data, buf->len);
fz_drop_buffer(ctx, buf);
buf = tmp;
addhexfilter(obj);
newlen = fz_new_int(ctx, buf->len);
fz_dict_puts(ctx, obj, "Length", newlen);
fz_drop_obj(ctx, newlen);
}
fprintf(out, "%d %d obj\n", num, gen);
fz_fprint_obj(ctx, out, obj, !doexpand);
fprintf(out, "stream\n");
fwrite(buf->data, 1, buf->len, out);
fprintf(out, "endstream\nendobj\n\n");
fz_drop_buffer(ctx, buf);
}
static void expandstream(fz_obj *obj, int num, int gen)
{
fz_buffer *buf, *tmp;
fz_obj *newlen;
buf = pdf_load_stream(xref, num, gen);
fz_dict_dels(obj, "Filter");
fz_dict_dels(obj, "DecodeParms");
if (doascii && isbinarystream(buf))
{
tmp = hexbuf(buf->data, buf->len);
fz_drop_buffer(ctx, buf);
buf = tmp;
addhexfilter(obj);
}
newlen = fz_new_int(ctx, buf->len);
fz_dict_puts(obj, "Length", newlen);
fz_drop_obj(newlen);
fprintf(out, "%d %d obj\n", num, gen);
fz_fprint_obj(out, obj, doexpand == 0);
fprintf(out, "stream\n");
fwrite(buf->data, 1, buf->len, out);
fprintf(out, "endstream\nendobj\n\n");
fz_drop_buffer(ctx, buf);
}
fz_error
pdf_parse_stm_obj(fz_obj **op, pdf_xref *xref, fz_stream *file, char *buf, int cap)
{
fz_error error;
int tok;
int len;
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
return fz_rethrow(error, "cannot parse token in object stream");
switch (tok)
{
case PDF_TOK_OPEN_ARRAY:
error = pdf_parse_array(op, xref, file, buf, cap);
if (error)
return fz_rethrow(error, "cannot parse object stream");
break;
case PDF_TOK_OPEN_DICT:
error = pdf_parse_dict(op, xref, file, buf, cap);
if (error)
return fz_rethrow(error, "cannot parse object stream");
break;
case PDF_TOK_NAME: *op = fz_new_name(buf); break;
case PDF_TOK_REAL: *op = fz_new_real(fz_atof(buf)); break;
case PDF_TOK_STRING: *op = fz_new_string(buf, len); break;
case PDF_TOK_TRUE: *op = fz_new_bool(1); break;
case PDF_TOK_FALSE: *op = fz_new_bool(0); break;
case PDF_TOK_NULL: *op = fz_new_null(); break;
case PDF_TOK_INT: *op = fz_new_int(atoi(buf)); break;
default: return fz_throw("unknown token in object stream");
}
return fz_okay;
}
static int
xps_decode_tiff_fax(struct tiff *tiff, int comp, fz_stream *chain, byte *wp, int wlen)
{
fz_stream *stm;
fz_obj *params;
fz_obj *columns, *rows, *black_is_1, *k, *encoded_byte_align;
int n;
fz_context *ctx = tiff->ctx;
columns = fz_new_int(ctx, tiff->imagewidth);
rows = fz_new_int(ctx, tiff->imagelength);
black_is_1 = fz_new_bool(ctx, tiff->photometric == 0);
k = fz_new_int(ctx, comp == 4 ? -1 : 0);
encoded_byte_align = fz_new_bool(ctx, comp == 2);
params = fz_new_dict(ctx, 5);
fz_dict_puts(ctx, params, "Columns", columns);
fz_dict_puts(ctx, params, "Rows", rows);
fz_dict_puts(ctx, params, "BlackIs1", black_is_1);
fz_dict_puts(ctx, params, "K", k);
fz_dict_puts(ctx, params, "EncodedByteAlign", encoded_byte_align);
fz_drop_obj(ctx, columns);
fz_drop_obj(ctx, rows);
fz_drop_obj(ctx, black_is_1);
fz_drop_obj(ctx, k);
fz_drop_obj(ctx, encoded_byte_align);
stm = fz_open_faxd(chain, params);
n = fz_read(stm, wp, wlen);
fz_close(stm);
fz_drop_obj(ctx, params);
if (n < 0)
return fz_error_note(ctx, n, "cannot read fax strip");
return fz_okay;
}
static void writexref(void)
{
fz_obj *trailer;
fz_obj *obj;
int startxref;
int num;
startxref = ftell(out);
fprintf(out, "xref\n0 %d\n", xref->len);
for (num = 0; num < xref->len; num++)
{
if (uselist[num])
fprintf(out, "%010d %05d n \n", ofslist[num], genlist[num]);
else
fprintf(out, "%010d %05d f \n", ofslist[num], genlist[num]);
}
fprintf(out, "\n");
trailer = fz_new_dict(ctx, 5);
obj = fz_new_int(ctx, xref->len);
fz_dict_puts(trailer, "Size", obj);
fz_drop_obj(obj);
obj = fz_dict_gets(xref->trailer, "Info");
if (obj)
fz_dict_puts(trailer, "Info", obj);
obj = fz_dict_gets(xref->trailer, "Root");
if (obj)
fz_dict_puts(trailer, "Root", obj);
obj = fz_dict_gets(xref->trailer, "ID");
if (obj)
fz_dict_puts(trailer, "ID", obj);
fprintf(out, "trailer\n");
fz_fprint_obj(out, trailer, doexpand == 0);
fprintf(out, "\n");
fz_drop_obj(trailer);
fprintf(out, "startxref\n%d\n%%%%EOF\n", startxref);
}
static void retainpages(int argc, char **argv)
{
fz_obj *oldroot, *root, *pages, *kids, *countobj, *parent, *olddests;
/* Keep only pages/type and (reduced) dest entries to avoid
* references to unretained pages */
oldroot = fz_dict_gets(xref->trailer, "Root");
pages = fz_dict_gets(oldroot, "Pages");
olddests = pdf_load_name_tree(xref, "Dests");
root = fz_new_dict(ctx, 2);
fz_dict_puts(root, "Type", fz_dict_gets(oldroot, "Type"));
fz_dict_puts(root, "Pages", fz_dict_gets(oldroot, "Pages"));
pdf_update_object(xref, fz_to_num(oldroot), fz_to_gen(oldroot), root);
fz_drop_obj(root);
/* Create a new kids array with only the pages we want to keep */
parent = fz_new_indirect(ctx, fz_to_num(pages), fz_to_gen(pages), xref);
kids = fz_new_array(ctx, 1);
/* Retain pages specified */
while (argc - fz_optind)
{
int page, spage, epage;
char *spec, *dash;
char *pagelist = argv[fz_optind];
spec = fz_strsep(&pagelist, ",");
while (spec)
{
dash = strchr(spec, '-');
if (dash == spec)
spage = epage = pdf_count_pages(xref);
else
spage = epage = atoi(spec);
if (dash)
{
if (strlen(dash) > 1)
epage = atoi(dash + 1);
else
epage = pdf_count_pages(xref);
}
if (spage > epage)
page = spage, spage = epage, epage = page;
if (spage < 1)
spage = 1;
if (epage > pdf_count_pages(xref))
epage = pdf_count_pages(xref);
for (page = spage; page <= epage; page++)
{
fz_obj *pageobj = xref->page_objs[page-1];
fz_obj *pageref = xref->page_refs[page-1];
fz_dict_puts(pageobj, "Parent", parent);
/* Store page object in new kids array */
fz_array_push(kids, pageref);
}
spec = fz_strsep(&pagelist, ",");
}
fz_optind++;
}
fz_drop_obj(parent);
/* Update page count and kids array */
countobj = fz_new_int(ctx, fz_array_len(kids));
fz_dict_puts(pages, "Count", countobj);
fz_drop_obj(countobj);
fz_dict_puts(pages, "Kids", kids);
fz_drop_obj(kids);
/* Also preserve the (partial) Dests name tree */
if (olddests)
{
int i;
fz_obj *names = fz_new_dict(ctx, 1);
fz_obj *dests = fz_new_dict(ctx, 1);
fz_obj *names_list = fz_new_array(ctx, 32);
for (i = 0; i < fz_dict_len(olddests); i++)
{
fz_obj *key = fz_dict_get_key(olddests, i);
fz_obj *val = fz_dict_get_val(olddests, i);
fz_obj *key_str = fz_new_string(ctx, fz_to_name(key), strlen(fz_to_name(key)));
fz_obj *dest = fz_dict_gets(val, "D");
dest = fz_array_get(dest ? dest : val, 0);
if (fz_array_contains(fz_dict_gets(pages, "Kids"), dest))
{
fz_array_push(names_list, key_str);
fz_array_push(names_list, val);
}
fz_drop_obj(key_str);
}
root = fz_dict_gets(xref->trailer, "Root");
fz_dict_puts(dests, "Names", names_list);
fz_dict_puts(names, "Dests", dests);
fz_dict_puts(root, "Names", names);
fz_drop_obj(names);
fz_drop_obj(dests);
fz_drop_obj(names_list);
fz_drop_obj(olddests);
}
}
fz_error
pdf_parse_ind_obj(fz_obj **op, pdf_xref *xref,
fz_stream *file, char *buf, int cap,
int *onum, int *ogen, int *ostmofs)
{
fz_error error = fz_okay;
fz_obj *obj = NULL;
int num = 0, gen = 0, stm_ofs;
int tok;
int len;
int a, b;
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
return fz_rethrow(error, "cannot parse indirect object (%d %d R)", num, gen);
if (tok != PDF_TOK_INT)
return fz_throw("expected object number (%d %d R)", num, gen);
num = atoi(buf);
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
return fz_rethrow(error, "cannot parse indirect object (%d %d R)", num, gen);
if (tok != PDF_TOK_INT)
return fz_throw("expected generation number (%d %d R)", num, gen);
gen = atoi(buf);
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
return fz_rethrow(error, "cannot parse indirect object (%d %d R)", num, gen);
if (tok != PDF_TOK_OBJ)
return fz_throw("expected 'obj' keyword (%d %d R)", num, gen);
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
return fz_rethrow(error, "cannot parse indirect object (%d %d R)", num, gen);
switch (tok)
{
case PDF_TOK_OPEN_ARRAY:
error = pdf_parse_array(&obj, xref, file, buf, cap);
if (error)
return fz_rethrow(error, "cannot parse indirect object (%d %d R)", num, gen);
break;
case PDF_TOK_OPEN_DICT:
error = pdf_parse_dict(&obj, xref, file, buf, cap);
if (error)
return fz_rethrow(error, "cannot parse indirect object (%d %d R)", num, gen);
break;
case PDF_TOK_NAME: obj = fz_new_name(buf); break;
case PDF_TOK_REAL: obj = fz_new_real(fz_atof(buf)); break;
case PDF_TOK_STRING: obj = fz_new_string(buf, len); break;
case PDF_TOK_TRUE: obj = fz_new_bool(1); break;
case PDF_TOK_FALSE: obj = fz_new_bool(0); break;
case PDF_TOK_NULL: obj = fz_new_null(); break;
case PDF_TOK_INT:
a = atoi(buf);
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
return fz_rethrow(error, "cannot parse indirect object (%d %d R)", num, gen);
if (tok == PDF_TOK_STREAM || tok == PDF_TOK_ENDOBJ)
{
obj = fz_new_int(a);
goto skip;
}
if (tok == PDF_TOK_INT)
{
b = atoi(buf);
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
return fz_rethrow(error, "cannot parse indirect object (%d %d R)", num, gen);
if (tok == PDF_TOK_R)
{
obj = fz_new_indirect(a, b, xref);
break;
}
}
return fz_throw("expected 'R' keyword (%d %d R)", num, gen);
case PDF_TOK_ENDOBJ:
obj = fz_new_null();
goto skip;
default:
return fz_throw("syntax error in object (%d %d R)", num, gen);
}
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
{
fz_drop_obj(obj);
return fz_rethrow(error, "cannot parse indirect object (%d %d R)", num, gen);
}
skip:
if (tok == PDF_TOK_STREAM)
{
int c = fz_read_byte(file);
while (c == ' ')
c = fz_read_byte(file);
if (c == '\r')
{
c = fz_peek_byte(file);
if (c != '\n')
fz_warn("line feed missing after stream begin marker (%d %d R)", num, gen);
else
fz_read_byte(file);
}
stm_ofs = fz_tell(file);
}
else if (tok == PDF_TOK_ENDOBJ)
{
stm_ofs = 0;
}
else
{
fz_warn("expected 'endobj' or 'stream' keyword (%d %d R)", num, gen);
stm_ofs = 0;
}
if (onum) *onum = num;
if (ogen) *ogen = gen;
if (ostmofs) *ostmofs = stm_ofs;
*op = obj;
return fz_okay;
}
fz_error
pdf_parse_dict(fz_obj **op, pdf_xref *xref, fz_stream *file, char *buf, int cap)
{
fz_error error = fz_okay;
fz_obj *dict = NULL;
fz_obj *key = NULL;
fz_obj *val = NULL;
int tok;
int len;
int a, b;
dict = fz_new_dict(8);
while (1)
{
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
{
fz_drop_obj(dict);
return fz_rethrow(error, "cannot parse dict");
}
skip:
if (tok == PDF_TOK_CLOSE_DICT)
{
*op = dict;
return fz_okay;
}
/* for BI .. ID .. EI in content streams */
if (tok == PDF_TOK_KEYWORD && !strcmp(buf, "ID"))
{
*op = dict;
return fz_okay;
}
if (tok != PDF_TOK_NAME)
{
fz_drop_obj(dict);
return fz_throw("invalid key in dict");
}
key = fz_new_name(buf);
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
{
fz_drop_obj(key);
fz_drop_obj(dict);
return fz_rethrow(error, "cannot parse dict");
}
switch (tok)
{
case PDF_TOK_OPEN_ARRAY:
error = pdf_parse_array(&val, xref, file, buf, cap);
if (error)
{
fz_drop_obj(key);
fz_drop_obj(dict);
return fz_rethrow(error, "cannot parse dict");
}
break;
case PDF_TOK_OPEN_DICT:
error = pdf_parse_dict(&val, xref, file, buf, cap);
if (error)
{
fz_drop_obj(key);
fz_drop_obj(dict);
return fz_rethrow(error, "cannot parse dict");
}
break;
case PDF_TOK_NAME: val = fz_new_name(buf); break;
case PDF_TOK_REAL: val = fz_new_real(fz_atof(buf)); break;
case PDF_TOK_STRING: val = fz_new_string(buf, len); break;
case PDF_TOK_TRUE: val = fz_new_bool(1); break;
case PDF_TOK_FALSE: val = fz_new_bool(0); break;
case PDF_TOK_NULL: val = fz_new_null(); break;
case PDF_TOK_INT:
/* 64-bit to allow for numbers > INT_MAX and overflow */
a = (int) strtoll(buf, 0, 10);
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
{
fz_drop_obj(key);
fz_drop_obj(dict);
return fz_rethrow(error, "cannot parse dict");
}
if (tok == PDF_TOK_CLOSE_DICT || tok == PDF_TOK_NAME ||
(tok == PDF_TOK_KEYWORD && !strcmp(buf, "ID")))
{
val = fz_new_int(a);
fz_dict_put(dict, key, val);
fz_drop_obj(val);
fz_drop_obj(key);
goto skip;
}
if (tok == PDF_TOK_INT)
{
b = atoi(buf);
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
{
fz_drop_obj(key);
fz_drop_obj(dict);
return fz_rethrow(error, "cannot parse dict");
}
if (tok == PDF_TOK_R)
{
val = fz_new_indirect(a, b, xref);
break;
}
}
fz_drop_obj(key);
fz_drop_obj(dict);
return fz_throw("invalid indirect reference in dict");
default:
fz_drop_obj(key);
fz_drop_obj(dict);
return fz_throw("unknown token in dict");
}
fz_dict_put(dict, key, val);
fz_drop_obj(val);
fz_drop_obj(key);
}
}
fz_error
pdf_parse_array(fz_obj **op, pdf_xref *xref, fz_stream *file, char *buf, int cap)
{
fz_error error = fz_okay;
fz_obj *ary = NULL;
fz_obj *obj = NULL;
int a = 0, b = 0, n = 0;
int tok;
int len;
ary = fz_new_array(4);
while (1)
{
error = pdf_lex(&tok, file, buf, cap, &len);
if (error)
{
fz_drop_obj(ary);
return fz_rethrow(error, "cannot parse array");
}
if (tok != PDF_TOK_INT && tok != PDF_TOK_R)
{
if (n > 0)
{
obj = fz_new_int(a);
fz_array_push(ary, obj);
fz_drop_obj(obj);
}
if (n > 1)
{
obj = fz_new_int(b);
fz_array_push(ary, obj);
fz_drop_obj(obj);
}
n = 0;
}
if (tok == PDF_TOK_INT && n == 2)
{
obj = fz_new_int(a);
fz_array_push(ary, obj);
fz_drop_obj(obj);
a = b;
n --;
}
switch (tok)
{
case PDF_TOK_CLOSE_ARRAY:
*op = ary;
return fz_okay;
case PDF_TOK_INT:
if (n == 0)
a = atoi(buf);
if (n == 1)
b = atoi(buf);
n ++;
break;
case PDF_TOK_R:
if (n != 2)
{
fz_drop_obj(ary);
return fz_throw("cannot parse indirect reference in array");
}
obj = fz_new_indirect(a, b, xref);
fz_array_push(ary, obj);
fz_drop_obj(obj);
n = 0;
break;
case PDF_TOK_OPEN_ARRAY:
error = pdf_parse_array(&obj, xref, file, buf, cap);
if (error)
{
fz_drop_obj(ary);
return fz_rethrow(error, "cannot parse array");
}
fz_array_push(ary, obj);
fz_drop_obj(obj);
break;
case PDF_TOK_OPEN_DICT:
error = pdf_parse_dict(&obj, xref, file, buf, cap);
if (error)
{
fz_drop_obj(ary);
return fz_rethrow(error, "cannot parse array");
}
fz_array_push(ary, obj);
fz_drop_obj(obj);
break;
case PDF_TOK_NAME:
obj = fz_new_name(buf);
fz_array_push(ary, obj);
fz_drop_obj(obj);
break;
case PDF_TOK_REAL:
obj = fz_new_real(fz_atof(buf));
fz_array_push(ary, obj);
fz_drop_obj(obj);
break;
case PDF_TOK_STRING:
obj = fz_new_string(buf, len);
fz_array_push(ary, obj);
fz_drop_obj(obj);
break;
case PDF_TOK_TRUE:
obj = fz_new_bool(1);
fz_array_push(ary, obj);
fz_drop_obj(obj);
break;
case PDF_TOK_FALSE:
obj = fz_new_bool(0);
fz_array_push(ary, obj);
fz_drop_obj(obj);
break;
case PDF_TOK_NULL:
obj = fz_new_null();
fz_array_push(ary, obj);
fz_drop_obj(obj);
break;
default:
fz_drop_obj(ary);
return fz_throw("cannot parse token in array");
}
}
}
