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%%
%% This is file `l3str.sty',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% l3str.dtx (with options: `package')
%%
%% EXPERIMENTAL CODE
%%
%% Do not distribute this file without also distributing the
%% source files specified above.
%%
%% Do not distribute a modified version of this file.
%%
%% File: l3str.dtx Copyright (C) 2011-2013 The LaTeX3 Project
%%
%% It may be distributed and/or modified under the conditions of the
%% LaTeX Project Public License (LPPL), either version 1.3c of this
%% license or (at your option) any later version. The latest version
%% of this license is in the file
%%
%% http://www.latex-project.org/lppl.txt
%%
%% This file is part of the "l3experimental bundle" (The Work in LPPL)
%% and all files in that bundle must be distributed together.
%%
%% The released version of this bundle is available from CTAN.
%%
%% -----------------------------------------------------------------------
%%
%% The development version of the bundle can be found at
%%
%% http://www.latex-project.org/svnroot/experimental/trunk/
%%
%% for those people who are interested.
%%
%%%%%%%%%%%
%% NOTE: %%
%%%%%%%%%%%
%%
%% Snapshots taken from the repository represent work in progress and may
%% not work or may contain conflicting material! We therefore ask
%% people _not_ to put them into distributions, archives, etc. without
%% prior consultation with the LaTeX3 Project.
%%
%% -----------------------------------------------------------------------
\RequirePackage{expl3}
\GetIdInfo$Id: l3str.dtx 4452 2013-01-20 10:18:32Z joseph $
{L3 Experimental strings}
\ProvidesExplPackage
{\ExplFileName}{\ExplFileDate}{\ExplFileVersion}{\ExplFileDescription}
\cs_new_eq:NN \str_new:N \tl_new:N
\cs_generate_variant:Nn \str_new:N { c }
\tl_map_inline:nn
{
{ set }
{ gset }
{ const }
{ put_left }
{ gput_left }
{ put_right }
{ gput_right }
}
{
\cs_new_protected:cpx { str_ #1 :Nn } ##1##2
{ \exp_not:c { tl_ #1 :Nx } ##1 { \exp_not:N \tl_to_str:n {##2} } }
\exp_args:Nc \cs_generate_variant:Nn { str_ #1 :Nn } { Nx , cn , cx }
}
\str_const:Nx \c_backslash_str { \cs_to_str:N \\ }
\str_const:Nx \c_left_brace_str { \cs_to_str:N \{ }
\str_const:Nx \c_right_brace_str { \cs_to_str:N \} }
\str_const:Nx \c_hash_str { \cs_to_str:N \# }
\str_const:Nx \c_tilde_str { \cs_to_str:N \~ }
\str_const:Nx \c_percent_str { \cs_to_str:N \% }
\str_new:N \l_tmpa_str
\str_new:N \l_tmpb_str
\str_new:N \g_tmpa_str
\str_new:N \g_tmpb_str
\cs_new_nopar:Npn \str_count_spaces:N
{ \exp_args:No \str_count_spaces:n }
\cs_new:Npn \str_count_spaces:n #1
{
\int_eval:n
{
\exp_after:wN \__str_count_spaces_loop:wwwwwwwww
\tl_to_str:n {#1} ~
X 7 ~ X 6 ~ X 5 ~ X 4 ~ X 3 ~ X 2 ~ X 1 ~ X 0 ~ X -1 ~
\q_stop
}
}
\cs_new:Npn \__str_count_spaces_loop:wwwwwwwww #1~#2~#3~#4~#5~#6~#7~#8~#9~
{
\if_meaning:w X #9
\use_i_delimit_by_q_stop:nw
\fi:
\c_nine + \__str_count_spaces_loop:wwwwwwwww
}
\cs_new_nopar:Npn \str_count:N { \exp_args:No \str_count:n }
\cs_new:Npn \str_count:n #1
{
\__str_count:n
{
\str_count_spaces:n {#1}
+ \exp_after:wN \__str_count_loop:NNNNNNNNN \tl_to_str:n {#1}
}
}
\cs_new:Npn \__str_count_unsafe:n #1
{
\__str_count:n
{ \__str_count_loop:NNNNNNNNN #1 }
}
\cs_new:Npn \str_count_ignore_spaces:n #1
{
\__str_count:n
{ \exp_after:wN \__str_count_loop:NNNNNNNNN \tl_to_str:n {#1} }
}
\cs_new:Npn \__str_count:n #1
{
\int_eval:n
{
#1
{ X \c_eight } { X \c_seven } { X \c_six }
{ X \c_five } { X \c_four } { X \c_three }
{ X \c_two } { X \c_one } { X \c_zero }
\q_stop
}
}
\cs_set:Npn \__str_count_loop:NNNNNNNNN #1#2#3#4#5#6#7#8#9
{
\if_meaning:w X #9
\exp_after:wN \use_none_delimit_by_q_stop:w
\fi:
\c_nine + \__str_count_loop:NNNNNNNNN
}
\cs_new_nopar:Npn \str_head:N { \exp_args:No \str_head:n }
\cs_set:Npn \str_head:n #1
{
\exp_after:wN \__str_head:w
\tl_to_str:n {#1}
{ { } } ~ \q_stop
}
\cs_set:Npn \__str_head:w #1 ~ %
{ \use_i_delimit_by_q_stop:nw #1 { ~ } }
\cs_new:Npn \str_head_ignore_spaces:n #1
{
\exp_after:wN \use_i_delimit_by_q_stop:nw
\tl_to_str:n {#1} { } \q_stop
}
\cs_new_nopar:Npn \str_tail:N { \exp_args:No \str_tail:n }
\cs_set:Npn \str_tail:n #1
{
\exp_after:wN \__str_tail_auxi:w
\reverse_if:N \if_charcode:w
\scan_stop: \tl_to_str:n {#1} X X \q_stop
}
\cs_set:Npn \__str_tail_auxi:w #1 X #2 \q_stop { \fi: #1 }
\cs_new:Npn \str_tail_ignore_spaces:n #1
{
\exp_after:wN \__str_tail_auxii:w
\tl_to_str:n {#1} \q_mark \q_mark \q_stop
}
\cs_new:Npn \__str_tail_auxii:w #1 #2 \q_mark #3 \q_stop { #2 }
\group_begin:
\char_set_lccode:nn { `\* } { `\ }
\char_set_lccode:nn { `\A } { `\A }
\tl_to_lowercase:n
{
\group_end:
\cs_new:Npn \__str_to_other:n #1
{
\exp_after:wN \__str_to_other_loop:w \tl_to_str:n {#1} ~ %
A ~ A ~ A ~ A ~ A ~ A ~ A ~ A ~ \q_mark \q_stop
}
\cs_new:Npn \__str_to_other_loop:w
#1 ~ #2 ~ #3 ~ #4 ~ #5 ~ #6 ~ #7 ~ #8 ~ #9 \q_stop
{
\if_meaning:w A #8
\__str_to_other_end:w
\fi:
\__str_to_other_loop:w
#9 #1 * #2 * #3 * #4 * #5 * #6 * #7 * #8 * \q_stop
}
\cs_new:Npn \__str_to_other_end:w \fi: #1 \q_mark #2 * A #3 \q_stop
{ \fi: #2 }
}
\cs_new:Npn \__str_skip_c_zero:w #1;
{
\if_int_compare:w #1 > \c_eight
\exp_after:wN \__str_skip_loop:wNNNNNNNN
\else:
\exp_after:wN \__str_skip_end:w
\int_use:N \__int_eval:w
\fi:
#1 ;
}
\cs_new:Npn \__str_skip_loop:wNNNNNNNN #1; #2#3#4#5#6#7#8#9
{ \exp_after:wN \__str_skip_c_zero:w \int_use:N \__int_eval:w #1 - \c_eight ; }
\cs_new:Npn \__str_skip_end:w #1 ;
{
\exp_after:wN \__str_skip_end:NNNNNNNN
\if_case:w #1 \exp_stop_f: \or: \or: \or: \or: \or: \or: \or: \or:
}
\cs_new:Npn \__str_skip_end:NNNNNNNN #1#2#3#4#5#6#7#8 { \fi: \c_zero }
\cs_new:Npn \__str_collect_delimit_by_q_stop:w #1;
{ \__str_collect_loop:wn #1 ; { } }
\cs_new:Npn \__str_collect_loop:wn #1 ;
{
\if_int_compare:w #1 > \c_seven
\exp_after:wN \__str_collect_loop:wnNNNNNNN
\else:
\exp_after:wN \__str_collect_end:wn
\fi:
#1 ;
}
\cs_new:Npn \__str_collect_loop:wnNNNNNNN #1; #2 #3#4#5#6#7#8#9
{
\exp_after:wN \__str_collect_loop:wn
\int_use:N \__int_eval:w #1 - \c_seven ;
{ #2 #3#4#5#6#7#8#9 }
}
\cs_new:Npn \__str_collect_end:wn #1 ;
{
\exp_after:wN \__str_collect_end:nnnnnnnnw
\if_case:w \if_int_compare:w #1 > \c_zero #1 \else: 0 \fi: \exp_stop_f:
\or: \or: \or: \or: \or: \or: \fi:
}
\cs_new:Npn \__str_collect_end:nnnnnnnnw #1#2#3#4#5#6#7#8 #9 \q_stop
{ #1#2#3#4#5#6#7#8 }
\cs_new_nopar:Npn \str_item:Nn { \exp_args:No \str_item:nn }
\cs_new:Npn \str_item:nn #1#2
{
\exp_args:Nf \tl_to_str:n
{
\exp_args:Nf \__str_item_unsafe:nn
{ \__str_to_other:n {#1} } {#2}
}
}
\cs_new:Npn \str_item_ignore_spaces:nn #1
{ \exp_args:No \__str_item_unsafe:nn { \tl_to_str:n {#1} } }
\cs_new:Npn \__str_item_unsafe:nn #1#2
{
\exp_after:wN \__str_item:ww
\int_use:N \__int_eval:w #2 \exp_after:wN ;
\__int_value:w \__str_count_unsafe:n {#1} ;
#1 \q_stop
}
\cs_new:Npn \__str_item:ww #1; #2;
{
\int_compare:nNnTF {#1} < \c_zero
{
\int_compare:nNnTF {#1} < {-#2}
{ \use_none_delimit_by_q_stop:w }
{
\exp_after:wN \use_i_delimit_by_q_stop:nw
\tex_romannumeral:D \exp_after:wN \__str_skip_c_zero:w
\int_use:N \__int_eval:w #1 + #2 ;
}
}
{
\int_compare:nNnTF {#1} > {#2}
{ \use_none_delimit_by_q_stop:w }
{
\exp_after:wN \use_i_delimit_by_q_stop:nw
\tex_romannumeral:D \__str_skip_c_zero:w #1 ; { }
}
}
}
\cs_new:Npn \__str_range_normalize:nn #1#2
{
\int_eval:n
{
\if_int_compare:w #1 < \c_zero
\if_int_compare:w #1 < -#2 \exp_stop_f:
\c_zero
\else:
#1 + #2 + \c_one
\fi:
\else:
\if_int_compare:w #1 < #2 \exp_stop_f:
#1
\else:
#2
\fi:
\fi:
}
}
\cs_new_nopar:Npn \str_range:Nnn { \exp_args:No \str_range:nnn }
\cs_new:Npn \str_range:nnn #1#2#3
{
\exp_args:Nf \tl_to_str:n
{
\exp_args:Nf \__str_range_unsafe:nnn
{ \__str_to_other:n {#1} } {#2} {#3}
}
}
\cs_new:Npn \str_range_ignore_spaces:nnn #1
{ \exp_args:No \__str_range_unsafe:nnn { \tl_to_str:n {#1} } }
\cs_new:Npn \__str_range_unsafe:nnn #1#2#3
{
\exp_after:wN \__str_range:www
\__int_value:w \__str_count_unsafe:n {#1} \exp_after:wN ;
\int_use:N \__int_eval:w #2 - \c_one \exp_after:wN ;
\int_use:N \__int_eval:w #3 ;
#1 \q_stop
}
\cs_new:Npn \__str_range:www #1; #2; #3;
{
\exp_args:Nf \__str_range:nnw
{ \__str_range_normalize:nn {#2} {#1} }
{ \__str_range_normalize:nn {#3} {#1} }
}
\cs_new:Npn \__str_range:nnw #1#2
{
\exp_after:wN \__str_collect_delimit_by_q_stop:w
\int_use:N \__int_eval:w #2 - #1 \exp_after:wN ;
\tex_romannumeral:D \__str_skip_c_zero:w #1 ;
}
\prg_new_conditional:Npnn \str_if_eq:NN #1#2 { p , TF , T , F }
{
\if_int_compare:w \pdftex_strcmp:D { \tl_to_str:N #1 } { \tl_to_str:N #2 }
= \c_zero \prg_return_true: \else: \prg_return_false: \fi:
}
\cs_new_eq:NN \str_show:n \tl_show:n
\cs_new_eq:NN \str_show:N \tl_show:N
\cs_generate_variant:Nn \str_show:N { c }
\cs_new:Npn \str_substr:Nnn #1 { \__str_substr:nnn { \str_range:Nnn #1 } }
\cs_new:Npn \str_substr:nnn #1 { \__str_substr:nnn { \str_range:nnn {#1} } }
\cs_new:Npn \str_substr_ignore_spaces:nnn #1
{ \__str_substr:nnn { \str_range_ignore_spaces:nnn {#1} } }
\cs_new:Npn \__str_substr:nnn #1#2#3
{
\tl_if_empty:nTF {#2}
{ \tl_if_empty:nTF {#3} { #1 { 1} { -1 } } { #1 { 1} {#3} } }
{ \tl_if_empty:nTF {#3} { #1 {#2} { -1 } } { #1 {#2} {#3} } }
}
\cs_new_eq:NN \c_lbrace_str \c_left_brace_str
\cs_new_eq:NN \c_rbrace_str \c_right_brace_str
%%
%%
%% End of file `l3str.sty'.
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