NAME

SYNOPSIS

char *quotestrdup(char *s)

Rune *quoterunestrdup(Rune *s)

char *unquotestrdup(char *s)

Rune *unquoterunestrdup(Rune *s)

int quotestrfmt(Fmt*)

int quoterunestrfmt(Fmt*)

void quotefmtinstall(void)

int (*doquote)(int c)

int needsrcquote(int c)

DESCRIPTION

Don't worry!
    

when quoted becomes

'Don''t worry!'
    

The empty string is represented by two quotes, ''.

The first four functions act as variants of strdup (see Each returns a freshly allocated copy of the string, created using Quotestrdup returns a quoted copy of s, while unquotestrdup returns a copy of s with the quotes evaluated. The rune versions of these functions do the same for strings (see

The string returned by quotestrdup or quoterunestrdup has the following properties:

1.

If the original string s is empty, the returned string is ''.

2.

If s contains no quotes, blanks, or control characters, the returned string is identical to s.

3.

If s needs quotes to be added, the first character of the returned string will be a quote. For example, hello world becomes 'hello world' not hello' 'world.

The function pointer doquote is nil by default. If it is non-nil, characters are passed to that function to see if they should be quoted. This mechanism allows programs to specify that characters other than blanks, control characters, or quotes be quoted. Regardless of the return value of *doquote, blanks, control characters, and quotes are always quoted. Needsrcquote is provided as a doquote function that flags any character special to

Quotestrfmt and quoterunestrfmt are formatting routines that produce quoted strings as output. They may be installed by hand, but quotefmtinstall installs them under the standard format characters q and Q. (They are not installed automatically.) If the format string includes the alternate format character #, for example %#q, the printed string will always be quoted; otherwise quotes will only be provided if necessary to avoid ambiguity. In <libc.h> there are #pragma statements so the compiler can type-check uses of %q and %Q in format strings.

SOURCE

SEE ALSO

BUGS