jbig2dec: Improve error handling.

Some functions detected errors but would not return these
to the caller. These functions may now indicate errors:

  jbig2_arith_decode(), jbig2_image_resize()

Errors detected by following functions were not always
handled, but they are now handled properly:

  jbig2_arith_decode(), jbig2_arith_iaid_decode()
  jbig2_arith_int_ctx_new(), jbig2_build_huffman_table()
  jbig2_complete_page(), jbig2_image_compose()
  jbig2_decode_refinement_region(), jbig2_ctx_new()
  jbig2_image_resize(), jbig2_image_write_pbm()
  jbig2_image_write_pbm_file(), jbig2_image_write_png()
  jbig2_image_write_png_file(), jbig2_metadata_add()
  jbig2_page_add_result(), jbig2_renew()
  jbig2_strndup()

Some functions detected errors but did not fail early enough:

  jbig2_decode_pattern_dict(), jbig2_decode_halftone_region()

jbig2_decode_mmr_line() detected errors but did not produce
suitable error messages. This has been rectified.

Finally, if a subfunction indicates an error by returning an
error code, the calling function will report a warning and
return, indicating failure.

1 files changed, 1 insertions, 1 deletions

diff --git a/jbig2dec/jbig2_arith.h b/jbig2dec/jbig2_arith.h
index 990205c2d..96b7ff387 100644
--- a/jbig2dec/jbig2_arith.h
+++ b/jbig2dec/jbig2_arith.h
@@ -28,7 +28,7 @@ typedef unsigned char Jbig2ArithCx;
 Jbig2ArithState *jbig2_arith_new(Jbig2Ctx *ctx, Jbig2WordStream *ws);
 
 /* decode a bit */
-bool            jbig2_arith_decode(Jbig2ArithState *as, Jbig2ArithCx *pcx);
+bool            jbig2_arith_decode(Jbig2ArithState *as, Jbig2ArithCx *pcx, int *code);
 
 /* returns true if the end of the data stream has been reached (for sanity checks) */
 bool            jbig2_arith_has_reached_marker(Jbig2ArithState *as);