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%%
%% This is file `l3str-esc-string.def',
%% generated with the docstrip utility.
%%
%% The original source files were:
%%
%% l3str-convert.dtx (with options: `string')
%%
%% Copyright (C) 2011-2017 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.
%%
%% File: l3str-convert.dtx Copyright (C) 2013-2017 The LaTeX3 Project
\group_begin:
\char_set_lccode:nn {`\*} {`\\}
\char_set_catcode_other:N \^^J
\char_set_catcode_other:N \^^M
\tex_lowercase:D
{
\cs_new_protected:Npn \__str_convert_unescape_string:
{
\group_begin:
\flag_clear:n { str_byte }
\flag_clear:n { str_error }
\int_set:Nn \tex_escapechar:D { 92 }
\tl_gset:Nx \g__str_result_tl
{
\exp_after:wN \__str_unescape_string_newlines:wN
\g__str_result_tl \__prg_break: ^^M ?
\__prg_break_point:
}
\tl_gset:Nx \g__str_result_tl
{
\exp_after:wN \__str_unescape_string_loop:wNNN
\g__str_result_tl * ?? { ? \__prg_break: }
\__prg_break_point:
}
\__str_if_flag_error:nnx { str_byte } { non-byte } { string }
\__str_if_flag_error:nnx { str_error } { unescape-string } { }
\group_end:
}
\cs_new:Npn \__str_unescape_string_loop:wNNN #1 *#2#3#4
}
{
\__str_filter_bytes:n {#1}
\use_none:n #4
\__str_output_byte:w '
\__str_octal_use:NTF #2
{
\__str_octal_use:NTF #3
{
\__str_octal_use:NTF #4
{
\if_int_compare:w #2 > 3 \exp_stop_f:
- 256
\fi:
\__str_unescape_string_repeat:NNNNNN
}
{ \__str_unescape_string_repeat:NNNNNN ? }
}
{ \__str_unescape_string_repeat:NNNNNN ?? }
}
{
\str_case_x:nnF {#2}
{
{ \c_backslash_str } { 134 }
{ ( } { 50 }
{ ) } { 51 }
{ r } { 15 }
{ f } { 14 }
{ n } { 12 }
{ t } { 11 }
{ b } { 10 }
{ ^^J } { 0 - 1 }
}
{
\flag_raise:n { str_error }
0 - 1 \use_i:nn
}
}
\__str_output_end:
\use_i:nn \__str_unescape_string_loop:wNNN #2#3#4
}
\cs_new:Npn \__str_unescape_string_repeat:NNNNNN #1#2#3#4#5#6
{ \__str_output_end: \__str_unescape_string_loop:wNNN }
\cs_new:Npn \__str_unescape_string_newlines:wN #1 ^^M #2
{
#1
\if_charcode:w ^^J #2 \else: ^^J \fi:
\__str_unescape_string_newlines:wN #2
}
\__msg_kernel_new:nnnn { str } { unescape-string }
{ String~invalid~in~escaping~'string'. }
{
LaTeX~came~across~an~escape~character~'\c_backslash_str'~
not~followed~by~any~of:~'n',~'r',~'t',~'b',~'f',~'(',~')',~
'\c_backslash_str',~one~to~three~octal~digits,~or~the~end~
of~a~line.
}
\group_end:
\str_const:Nx \c__str_escape_string_str
{ \c_backslash_str ( ) }
\cs_new_protected:Npn \__str_convert_escape_string:
{ \__str_convert_gmap:N \__str_escape_string_char:N }
\cs_new:Npn \__str_escape_string_char:N #1
{
\__str_if_escape_string:NTF #1
{
\__str_if_contains_char:NNT
\c__str_escape_string_str #1
{ \c_backslash_str }
#1
}
{
\c_backslash_str
\int_div_truncate:nn {`#1} {64}
\int_mod:nn { \int_div_truncate:nn {`#1} { 8 } } { 8 }
\int_mod:nn {`#1} { 8 }
}
}
\prg_new_conditional:Npnn \__str_if_escape_string:N #1 { TF }
{
\if_int_compare:w `#1 < "21 \exp_stop_f:
\prg_return_false:
\else:
\if_int_compare:w `#1 > "7E \exp_stop_f:
\prg_return_false:
\else:
\prg_return_true:
\fi:
\fi:
}
%%
%%
%% End of file `l3str-esc-string.def'.
|
