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Use a stack to manage the allocation of input and output streams.
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\RequirePackage{expl3} | |
\ExplSyntaxOn | |
\seq_new:N \c__iow_streams_seq | |
\seq_new:N \g__iow_streams_seq | |
\int_step_inline:nnnn \c_zero \c_one \c_fifteen | |
{ \seq_gput_right:Nn \g__iow_streams_seq {#1} } | |
\seq_gset_eq:NN \c__iow_streams_seq \g__iow_streams_seq | |
\tl_new:N \l__iow_stream_tl | |
\cs_set_protected:Npn \__iow_open:Nn #1#2 | |
{ | |
\iow_close:N #1 | |
\seq_gpop:NNTF \g__iow_streams_seq \l__iow_stream_tl | |
{ | |
\tex_global:D \tex_chardef:D #1 = \l__iow_stream_tl \scan_stop: | |
\iow_log:x | |
{ \token_to_str:N #1 ~=~ output~stream~ \tl_use:N \l__iow_stream_tl } | |
\prop_gput:NVn \g__iow_streams_prop #1 {#2} | |
\tex_immediate:D \tex_openout:D #1#2 \scan_stop: | |
} | |
{ \__msg_kernel_fatal:nn { kernel } { output-streams-exhausted } } | |
} | |
\cs_set_protected:Npn \iow_close:N #1 | |
{ | |
\token_if_chardef:NTF #1 | |
{ | |
\seq_if_in:NVT \c__iow_streams_seq #1 | |
{ | |
\seq_if_in:NVF \g__iow_streams_seq #1 | |
{ | |
\tex_immediate:D \tex_closeout:D #1 | |
\seq_gpush:NV \g__iow_streams_seq #1 | |
\prop_gremove:NV \g__iow_streams_prop #1 | |
\cs_gset_eq:NN #1 \c_term_iow | |
} | |
} | |
} | |
{ \ERROR } | |
} | |
\int_step_inline:nnnn \c_zero \c_one \c_fifteen | |
{ \iow_new:c { g_tmp_#1_iow } } | |
\int_step_inline:nnnn \c_zero \c_one \c_fifteen | |
{ \iow_open:cn { g_tmp_#1_iow } { test- #1 .txt } } | |
\seq_show:N \g__iow_streams_seq | |
\iow_list_streams: | |
\int_step_inline:nnnn \c_zero \c_one \c_ten | |
{ \iow_close:c { g_tmp_#1_iow } } | |
\seq_show:N \g__iow_streams_seq | |
\iow_list_streams: | |
\int_step_inline:nnnn \c_zero \c_one \c_ten | |
{ \iow_open:cn { g_tmp_#1_iow } { test- #1 .txt } } | |
\seq_show:N \g__iow_streams_seq | |
\iow_list_streams: | |
\tex_end:D |
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