// quoted-string = ( <"> *(qdtext | quoted-pair ) <"> )
const char* parse_quoted_string(unsigned char **p)
{
unsigned char *ptmp = *p;
int arr[4][4] =
{ {1, -1, -1, -1},
{-1, 2, 99, 99},
{-1, -1, 3, 3},
{-1, -1, -1,-1} };
int line = 0, state = 0;
do {
if (state == 0 && !parse_lws(p))
line = 0;
else if (!parse_dquote(p))
line = 1;
else if (!parse_qdtext(p) || parse_quoted_pair(p))
line = 2;
else
line = 3;
state = arr[line][state];
if (-1 == state) {
*p = ptmp;
return ERR;
}
}
while (state != 99);
return NULL;
}
int wordexp(const char *words, wordexp_t * we, int flags)
{
size_t words_offset;
size_t word_length;
size_t max_length;
char *word = w_newword(&word_length, &max_length);
int error;
char *ifs;
char ifs_white[4];
wordexp_t old_word = *we;
if (flags & WRDE_REUSE) {
/* Minimal implementation of WRDE_REUSE for now */
wordfree(we);
old_word.we_wordv = NULL;
}
if ((flags & WRDE_APPEND) == 0) {
we->we_wordc = 0;
if (flags & WRDE_DOOFFS) {
we->we_wordv = calloc(1 + we->we_offs, sizeof(char *));
if (we->we_wordv == NULL) {
error = WRDE_NOSPACE;
goto do_error;
}
} else {
we->we_wordv = calloc(1, sizeof(char *));
if (we->we_wordv == NULL) {
error = WRDE_NOSPACE;
goto do_error;
}
we->we_offs = 0;
}
}
/* Find out what the field separators are.
* There are two types: whitespace and non-whitespace.
*/
ifs = getenv("IFS");
if (!ifs)
/* IFS unset - use <space><tab><newline>. */
ifs = strcpy(ifs_white, " \t\n");
else {
char *ifsch = ifs;
char *whch = ifs_white;
/* Start off with no whitespace IFS characters */
ifs_white[0] = '\0';
while (*ifsch != '\0') {
if ((*ifsch == ' ') || (*ifsch == '\t') || (*ifsch == '\n')) {
/* Whitespace IFS. See first whether it is already in our
collection. */
char *runp = ifs_white;
while (runp < whch && *runp != '\0' && *runp != *ifsch)
++runp;
if (runp == whch)
*whch++ = *ifsch;
}
++ifsch;
}
*whch = '\0';
}
for (words_offset = 0; words[words_offset]; ++words_offset)
switch (words[words_offset]) {
case '\\':
error = parse_backslash(&word, &word_length, &max_length, words,
&words_offset);
if (error)
goto do_error;
break;
case '$':
error = parse_dollars(&word, &word_length, &max_length, words,
&words_offset, flags, we, ifs, ifs_white,
0);
if (error)
goto do_error;
break;
case '`':
if (flags & WRDE_NOCMD) {
error = WRDE_CMDSUB;
goto do_error;
}
++words_offset;
error = parse_backtick(&word, &word_length, &max_length, words,
&words_offset, flags, we, ifs,
ifs_white);
if (error)
goto do_error;
break;
case '"':
++words_offset;
error = parse_dquote(&word, &word_length, &max_length, words,
&words_offset, flags, we, ifs, ifs_white);
if (error)
goto do_error;
if (!word_length) {
error = w_addword(we, NULL);
if (error)
return error;
}
break;
case '\'':
++words_offset;
error = parse_squote(&word, &word_length, &max_length, words,
&words_offset);
if (error)
goto do_error;
if (!word_length) {
error = w_addword(we, NULL);
if (error)
return error;
}
break;
case '~':
error = parse_tilde(&word, &word_length, &max_length, words,
&words_offset, we->we_wordc);
if (error)
goto do_error;
break;
case '*':
case '[':
case '?':
error = parse_glob(&word, &word_length, &max_length, words,
&words_offset, flags, we, ifs, ifs_white);
if (error)
goto do_error;
break;
default:
/* Is it a word separator? */
if (strchr(" \t", words[words_offset]) == NULL) {
char ch = words[words_offset];
/* Not a word separator -- but is it a valid word char? */
if (strchr("\n|&;<>(){}", ch)) {
/* Fail */
error = WRDE_BADCHAR;
goto do_error;
}
/* "Ordinary" character -- add it to word */
word = w_addchar(word, &word_length, &max_length, ch);
if (word == NULL) {
error = WRDE_NOSPACE;
goto do_error;
}
break;
}
/* If a word has been delimited, add it to the list. */
if (word != NULL) {
error = w_addword(we, word);
if (error)
goto do_error;
}
word = w_newword(&word_length, &max_length);
}
/* End of string */
/* There was a word separator at the end */
if (word == NULL) /* i.e. w_newword */
return 0;
/* There was no field separator at the end */
return w_addword(we, word);
do_error:
/* Error:
* free memory used (unless error is WRDE_NOSPACE), and
* set we members back to what they were.
*/
free(word);
if (error == WRDE_NOSPACE)
return WRDE_NOSPACE;
if ((flags & WRDE_APPEND) == 0)
wordfree(we);
*we = old_word;
return error;
}