thodg/libiconv

2023-04-03T04:12:01

Allow overriding the newline conversion for EBCDIC encodings. Reported by Mike Fulton <mikefultonpersonal@gmail.com> in <https://lists.gnu.org/archive/html/bug-gnu-libiconv/2023-04/msg00009.html>. * include/iconv.h.in (ICONV_SURFACE_NONE, ICONV_SURFACE_EBCDIC_ZOS_UNIX): New macros. (ICONV_GET_FROM_SURFACE, ICONV_SET_FROM_SURFACE, ICONV_GET_TO_SURFACE, ICONV_SET_TO_SURFACE): New macros. * lib/converters.h (struct conv_struct): Add the fields isurface, osurface. (swap_x15_x25): New macro. * lib/iconv.c (iconv_open, iconv_open_into): Add local variables from_surface, to_surface. (ALL_SURFACES): New macro. (iconvctl): Adjust ICONV_TRIVIALP implementation. Implement the ICONV_{GET,SET}_{FROM,TO}_SURFACE requests. * lib/iconv_open1.h: Parse a /ZOS_UNIX surface specifier. Set from_surface, to_surface. * lib/iconv_open2.h: Copy the values of from_surface, to_surface into the conversion descriptor. * lib/ebcdic*.h (*_mbtowc): Test the isurface. If requested, call swap_x15_x25 right after fetching an input byte. (*_wctomb): Test the osurface. If requested, call swap_x15_x25 right before storing an output byte. * man/iconvctl.3 (REQUEST VALUES): Document the ICONV_{GET,SET}_{FROM,TO}_SURFACE requests. * src/iconv.c (main): If ICONV_EBCDIC_ZOS_UNIX is set, set the from/to surfaces accordingly. * man/iconv.1 (ENVIRONMENT): New section. * tests/check-ebcdic: New file. * tests/Makefile.in (check): Invoke it. (SOURCE_FILES): Add it. * NEWS: Mention the new functionality.