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Commit 4c2381fe authored by Marian Durkovic's avatar Marian Durkovic
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Backport VLM quoting changes from trunk (closes #816)

parent 641b7faa
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Showing with 105 additions and 86 deletions
src/misc/vlm.c
View file @ 4c2381fe
......@@ -255,87 +255,129 @@ int vlm_Load( vlm_t *p_vlm, const char *psz_file )
return 0;
}
/*****************************************************************************
* FindEndCommand
*****************************************************************************/
static const char *FindEndCommand( const char *psz_sent )
static const char quotes[] = "\"'";
/**
* FindCommandEnd: look for the end of a possibly quoted string
* @return NULL on mal-formatted string,
* pointer past the last character otherwise.
*/
static const char *FindCommandEnd (const char *psz_sent)
{
vlc_bool_t b_escape = VLC_FALSE;
char c, quote = 0;
switch( *psz_sent )
while ((c = *psz_sent) != '\0')
{
case '\"':
psz_sent++;
while( ( *psz_sent != '\"' || b_escape == VLC_TRUE )
&& ( *psz_sent != '\0' ) )
if (!quote)
{
if( *psz_sent == '\'' && b_escape == VLC_FALSE )
if (strchr(quotes,c)) // opening quote
quote = c;
else
if (isspace(c)) // non-escaped space
return psz_sent;
else
if( c == '\\' )
{
psz_sent = FindEndCommand( psz_sent );
if( psz_sent == NULL ) return NULL;
psz_sent++; // skip escaped character
if (*psz_sent == '\0')
return psz_sent;
}
else if( *psz_sent++ == '\\' && b_escape == VLC_FALSE )
b_escape = VLC_TRUE;
else
b_escape = VLC_FALSE;
}
if( *psz_sent == '\"' )
else
{
psz_sent++;
return psz_sent;
if (c == quote) // non-escaped matching quote
quote = 0;
else
if ((quote == '"') && (c == '\\'))
{
psz_sent++; // skip escaped character
if (*psz_sent == '\0')
return NULL; // error, closing quote missing
}
}
/* *psz_sent == '\0' -> number of " is incorrect */
else return NULL;
psz_sent++;
}
break;
// error (NULL) if we could not find a matching quote
return quote ? NULL : psz_sent;
}
case '\'':
psz_sent++;
while( ( *psz_sent != '\'' || b_escape == VLC_TRUE )
&& ( *psz_sent != '\0' ) )
/**
* Unescape a nul-terminated string.
* Note that in and out can be identical.
*
* @param out output buffer (at least <strlen (in) + 1> characters long)
* @param in nul-terminated string to be unescaped
*
* @return 0 on success, -1 on error.
*/
static int Unescape (char *out, const char *in)
{
char c, quote = 0;
while ((c = *in++) != '\0')
{
if (!quote)
{
if( *psz_sent == '\"' && b_escape == VLC_FALSE )
if (strchr(quotes,c)) // opening quote
{
psz_sent = FindEndCommand( psz_sent );
if( psz_sent == NULL ) return NULL;
quote = c;
continue;
}
else if( *psz_sent++ == '\\' && b_escape == VLC_FALSE )
b_escape = VLC_TRUE;
else
b_escape = VLC_FALSE;
}
if( *psz_sent == '\'' )
{
psz_sent++;
return psz_sent;
if( c == '\\' )
{
switch (c = *in++)
{
case '"':
case '\'':
case '\\':
*out++ = c;
continue;
case '\0':
*out = '\0';
return 0;
}
if (isspace(c))
{
*out++ = c;
continue;
}
/* None of the special cases - copy the backslash */
*out++ = '\\';
}
}
/* *psz_sent == '\0' -> number of " is incorrect */
else return NULL;
break;
default: /* now we can look for spaces */
while( ( *psz_sent != ' ' ) && ( *psz_sent != '\0' ) )
else
{
if( ( ( *psz_sent == '\'' ) || ( *psz_sent == '\"' ) )
&& b_escape == VLC_FALSE )
if (c == quote) // non-escaped matching quote
{
psz_sent = FindEndCommand( psz_sent );
if( psz_sent == NULL ) return NULL;
quote = 0;
continue;
}
if ((quote == '"') && (c == '\\'))
{
switch (c = *in++)
{
case '"':
case '\\':
*out++ = c;
continue;
case '\0': // should never happen
*out = '\0';
return -1;
}
/* None of the special cases - copy the backslash */
*out++ = '\\';
}
else if( *psz_sent++ == '\\' && b_escape == VLC_FALSE )
b_escape = VLC_TRUE;
else
b_escape = VLC_FALSE;
}
return psz_sent;
*out++ = c;
}
*out = '\0';
return 0;
}
/*****************************************************************************
......@@ -356,17 +398,13 @@ static int ExecuteCommand( vlm_t *p_vlm, const char *psz_command,
while( *psz_cmd != '\0' )
{
if( *psz_cmd == ' ' || *psz_cmd == '\t' )
if( isspace(*psz_cmd) )
{
psz_cmd++;
}
else
{
const char *psz_temp;
const char *psz_buf;
char *psz_dst;
vlc_bool_t b_escape = VLC_FALSE;
int i_temp;
/* support for comments */
if( i_command == 0 && *psz_cmd == '#')
......@@ -375,7 +413,7 @@ static int ExecuteCommand( vlm_t *p_vlm, const char *psz_command,
goto success;
}
psz_temp = FindEndCommand( psz_cmd );
psz_temp = FindCommandEnd( psz_cmd );
if( psz_temp == NULL )
{
......@@ -383,31 +421,12 @@ static int ExecuteCommand( vlm_t *p_vlm, const char *psz_command,
goto error;
}
i_temp = psz_temp - psz_cmd;
ppsz_command = realloc( ppsz_command, (i_command + 1) *
sizeof(char*) );
ppsz_command[ i_command ] = malloc( (i_temp + 1) * sizeof(char) );
/* unescape ", ' and \ ... and everything else */
psz_buf = psz_cmd;
psz_dst = ppsz_command[ i_command ];
while( i_temp-- )
{
if( *psz_buf == '\\' && b_escape == VLC_FALSE )
b_escape = VLC_TRUE;
else
{
b_escape = VLC_FALSE;
*psz_dst = *psz_buf;
psz_dst++;
}
psz_buf++;
}
*psz_dst = '\0';
ppsz_command[i_command] = strndup (psz_cmd, psz_temp - psz_cmd);
Unescape (ppsz_command[i_command], ppsz_command[i_command]);
i_command++;
psz_cmd = psz_temp;
}
}
......
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