How can LaTeX read utf8?












0















As described in the TeXbook, TeX reads files byte by byte, regardless of the particular format -- as I understand, this is just how INITEX is set up.



I also understand that LaTeX is just a collection of macros built on top of INITEX, described in most distributions of TeX by the file 'latex.ltx'.



The above two things are at odds with my understanding of LaTeX's ability to read utf8. I was under the impression that reading the input byte by byte (and thus for instance, only being able to access numbers from 0 to 255 using char or something) was baked into TeX, and thus would exist in all variants built on top of it.



Thus, how is LaTeX able to do this?










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  • The TeXbook describes the so-called Knuth-TeX engine, as well as a collection of macros frequently called "PlainTeX". Are you aware of newer engines called pdfTeX, XeTeX, and LuaTeX?

    – Mico
    27 mins ago
















0















As described in the TeXbook, TeX reads files byte by byte, regardless of the particular format -- as I understand, this is just how INITEX is set up.



I also understand that LaTeX is just a collection of macros built on top of INITEX, described in most distributions of TeX by the file 'latex.ltx'.



The above two things are at odds with my understanding of LaTeX's ability to read utf8. I was under the impression that reading the input byte by byte (and thus for instance, only being able to access numbers from 0 to 255 using char or something) was baked into TeX, and thus would exist in all variants built on top of it.



Thus, how is LaTeX able to do this?










share|improve this question























  • The TeXbook describes the so-called Knuth-TeX engine, as well as a collection of macros frequently called "PlainTeX". Are you aware of newer engines called pdfTeX, XeTeX, and LuaTeX?

    – Mico
    27 mins ago














0












0








0








As described in the TeXbook, TeX reads files byte by byte, regardless of the particular format -- as I understand, this is just how INITEX is set up.



I also understand that LaTeX is just a collection of macros built on top of INITEX, described in most distributions of TeX by the file 'latex.ltx'.



The above two things are at odds with my understanding of LaTeX's ability to read utf8. I was under the impression that reading the input byte by byte (and thus for instance, only being able to access numbers from 0 to 255 using char or something) was baked into TeX, and thus would exist in all variants built on top of it.



Thus, how is LaTeX able to do this?










share|improve this question














As described in the TeXbook, TeX reads files byte by byte, regardless of the particular format -- as I understand, this is just how INITEX is set up.



I also understand that LaTeX is just a collection of macros built on top of INITEX, described in most distributions of TeX by the file 'latex.ltx'.



The above two things are at odds with my understanding of LaTeX's ability to read utf8. I was under the impression that reading the input byte by byte (and thus for instance, only being able to access numbers from 0 to 255 using char or something) was baked into TeX, and thus would exist in all variants built on top of it.



Thus, how is LaTeX able to do this?







unicode






share|improve this question













share|improve this question











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asked 47 mins ago









extremeaxe5extremeaxe5

2094




2094













  • The TeXbook describes the so-called Knuth-TeX engine, as well as a collection of macros frequently called "PlainTeX". Are you aware of newer engines called pdfTeX, XeTeX, and LuaTeX?

    – Mico
    27 mins ago



















  • The TeXbook describes the so-called Knuth-TeX engine, as well as a collection of macros frequently called "PlainTeX". Are you aware of newer engines called pdfTeX, XeTeX, and LuaTeX?

    – Mico
    27 mins ago

















The TeXbook describes the so-called Knuth-TeX engine, as well as a collection of macros frequently called "PlainTeX". Are you aware of newer engines called pdfTeX, XeTeX, and LuaTeX?

– Mico
27 mins ago





The TeXbook describes the so-called Knuth-TeX engine, as well as a collection of macros frequently called "PlainTeX". Are you aware of newer engines called pdfTeX, XeTeX, and LuaTeX?

– Mico
27 mins ago










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