dos to unix CR/LF conversion?

[Henry Spencer]

On Sun, 9 Nov 2003, James McIntosh wrote:
> >> You should indicate you're using octal for \012.
> >The backslash-digits notation is always octal.  However, I should have
> >mentioned that, for the benefit of newcomers.
> 
> When the backslash is followed immediately by zero, then it is octal.
> When the backslash is followed immediately by a digit other than zero, or a
> letter A to F, or a to f, then it is hexadecimal.

Not in C it's not, nor in most of the other Unix/Linux languages.
Backslash followed by digits is *always* octal, no exceptions.  To
get hex, e.g. hex "ae", you have to say "\xae".

> For example:
> \070 is octal.

Correct.

> \70 is hexadecimal

Nope.  C printf("\070 \70\n") prints "8 8".

> \ae is hexadecimal
> \AE is hexadecimal

Nope.  The first is \a ("audible alert", ASCII BEL) followed by 'e'; the
second gives a compiler warning message ("unknown escape sequence") and
prints an 'A' and an 'E'.

> \2B is hexadecimal

Nope, it's a \002 -- ASCII STX, ^B -- followed by a 'B'.

                                                          Henry Spencer
                                                       henry-lqW1N6Cllo0sV2N9l4h3zg at public.gmane.org

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