Re: [RFC] Git config file reader in Perl (WIP)

From: Jakub Narebski <jnareb@gmail.com>
Date: Jan 19, 2007, 12:25 UTC
Message-ID: <200701191325.06337.jnareb@gmail.com>
In-Reply-To: <200701191310.32417.jnareb@gmail.com>

Jakub Narebski wrote:

Show 13 quoted lines

> Jakub Narebski wrote:
> 
>> BTW. it looks like C escape sequences are parsed, but not octal
>> escape sequences, nor no-op escaping other character.
>  
> From a bit of testing, as documentation of config file format
> is woefully incomplete, (yes, I know I should use the source)
> _some_ of C escape sequences aka. character escape codes (CEC)
> are parsed:
>  - "\t", tab character (HT, TAB)
>  - "\n", newline (NL)
>  - "\b", backspace (BS)
> It's a bit strange that "\b" is parsed...

[...]

> Values of configuration variables can span multiple lines by escaping
> newline, i.e. putting \ as the last character. Nice.

>From config.c:parse_value:73

		if (c == '\\') {
			c = get_next_char();
			switch (c) {
			case '\n':
				continue;
			case 't':
				c = '\t';
				break;
			case 'b':
				c = '\b';
				break;
			case 'n':
				c = '\n';
				break;
			/* Some characters escape as themselves */
			case '\\': case '"':
				break;
			/* Reject unknown escape sequences */
			default:
				return NULL;
			}

-- 
Jakub Narebski
Poland