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$PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.18 2005/09/19 17:21:46 momjian Exp $

$PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.19 2005/09/21 20:33:33 tgl Exp $

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<chapter Id="runtime-config">

<title>Run-time Configuration</title>

value is optional. Whitespace is insignificant and blank lines are

ignored. Hash marks (<literal>#</literal>) introduce comments

anywhere. Parameter values that are not simple identifiers or

numbers must be single-quoted.

numbers must be single-quoted. To embed a single quote in a parameter

value, write either two quotes (preferred) or backslash-quote.

</para>

<para>

%{

intGUC_yylex(void);

staticchar *GUC_scanstr(char *);

staticchar *GUC_scanstr(constchar *s);

%}

%option 8bit

QUALIFIED_ID {ID}"."{ID}

UNQUOTED_STRING {LETTER}({LETTER_OR_DIGIT}|[-._:/])*

STRING \'([^'\n]|\\.)*\'

STRING \'([^'\\\n]|\\.|\'\')*\'

opt_value[strlen(opt_value)-2] ='\0';

opt_value = GUC_scanstr(opt_value);

}

staticchar *

GUC_scanstr(char *s)

GUC_scanstr(constchar *s)

{

char *newStr;

intlen,

i,

j;

if (s ==NULL || s[0] =='\0')

{

if (s !=NULL)

pfree(s);

returnpstrdup("");

}

Assert(s !=NULL && s[0] =='\'');

len =strlen(s);

Assert(len >=2);

Assert(s[len-1] =='\'');

s++, len--;

newStr =palloc(len +1);/* string cannot get longer */

newStr =palloc(len);

for (i =0, j =0; i < len; i++)

{

default:

newStr[j] = s[i];

break;

}

}/* switch */

}

elseif (s[i] =='\'' && s[i+1] =='\'')

{

newStr[j] = s[++i];

}

newStr[j] = s[i];

j++;

}

newStr[j] ='\0';

pfree(s);

Assert(j >0 && j <= len);

newStr[--j] ='\0';

return newStr;

}