2 * a generic (simple) parser. Use to parse rr's, private key
3 * information and /etc/resolv.conf files
5 * a Net::DNS like library for C
6 * LibDNS Team @ NLnet Labs
7 * (c) NLnet Labs, 2005-2006
8 * See the file LICENSE for the license
10 #include <ldns/config.h>
11 #include <ldns/ldns.h>
16 ldns_lookup_table ldns_directive_types[] = {
17 { LDNS_DIR_TTL, "$TTL" },
18 { LDNS_DIR_ORIGIN, "$ORIGIN" },
19 { LDNS_DIR_INCLUDE, "$INCLUDE" },
23 /* add max_limit here? */
25 ldns_fget_token(FILE *f, char *token, const char *delim, size_t limit)
27 return ldns_fget_token_l(f, token, delim, limit, NULL);
31 ldns_fget_token_l(FILE *f, char *token, const char *delim, size_t limit, int *line_nr)
34 int p; /* 0 -> no parenthese seen, >0 nr of ( seen */
41 /* standard delimeters */
44 del = LDNS_PARSE_NORMAL;
58 while ((c = getc(f)) != EOF) {
59 if (c == '\r') /* carriage return */
61 if (c == '(' && prev_c != '\\' && !quoted) {
62 /* this only counts for non-comments */
70 if (c == ')' && prev_c != '\\' && !quoted) {
71 /* this only counts for non-comments */
80 /* more ) then ( - close off the string */
85 /* do something with comments ; */
86 if (c == ';' && quoted == 0) {
91 if (c == '\"' && com == 0 && prev_c != '\\') {
95 if (c == '\n' && com != 0) {
100 *line_nr = *line_nr + 1;
102 if (p == 0 && i > 0) {
116 if (c == '\n' && p != 0 && t > token) {
119 *line_nr = *line_nr + 1;
126 /* check if we hit the delim */
127 for (d = del; *d; d++) {
128 if (c == *d && i > 0 && prev_c != '\\' && p == 0) {
129 if (c == '\n' && line_nr) {
130 *line_nr = *line_nr + 1;
135 if (c != '\0' && c != '\n') {
138 if (limit > 0 && (i >= limit || (size_t)(t-token) >= limit)) {
142 if (c != '\0' && c != '\n') {
145 if (c == '\\' && prev_c == '\\')
164 if(*del == '"') /* do not skip over quotes, they are significant */
165 ldns_fskipcs_l(f, del+1, line_nr);
166 else ldns_fskipcs_l(f, del, line_nr);
176 ldns_fget_keyword_data(FILE *f, const char *keyword, const char *k_del, char *data,
177 const char *d_del, size_t data_limit)
179 return ldns_fget_keyword_data_l(f, keyword, k_del, data, d_del,
184 ldns_fget_keyword_data_l(FILE *f, const char *keyword, const char *k_del, char *data,
185 const char *d_del, size_t data_limit, int *line_nr)
187 /* we assume: keyword|sep|data */
191 if(strlen(keyword) >= LDNS_MAX_KEYWORDLEN)
193 fkeyword = LDNS_XMALLOC(char, LDNS_MAX_KEYWORDLEN);
197 i = ldns_fget_token(f, fkeyword, k_del, LDNS_MAX_KEYWORDLEN);
203 /* case??? i instead of strlen? */
204 if (strncmp(fkeyword, keyword, LDNS_MAX_KEYWORDLEN - 1) == 0) {
206 /* printf("%s\n%s\n", "Matching keyword", fkeyword); */
207 i = ldns_fget_token_l(f, data, d_del, data_limit, line_nr);
211 /*printf("no match for %s (read: %s)\n", keyword, fkeyword);*/
219 ldns_bget_token(ldns_buffer *b, char *token, const char *delim, size_t limit)
222 int p; /* 0 -> no parenthese seen, >0 nr of ( seen */
229 /* standard delimiters */
231 /* from isspace(3) */
232 del = LDNS_PARSE_NORMAL;
247 while ((c = ldns_bgetc(b)) != EOF) {
248 if (c == '\r') /* carriage return */
250 if (c == '(' && lc != '\\' && !quoted) {
251 /* this only counts for non-comments */
259 if (c == ')' && lc != '\\' && !quoted) {
260 /* this only counts for non-comments */
274 /* do something with comments ; */
275 if (c == ';' && quoted == 0) {
280 if (c == '"' && com == 0 && lc != '\\') {
284 if (c == '\n' && com != 0) {
298 if (c == '\n' && p != 0) {
305 /* check if we hit the delim */
306 for (d = del; *d; d++) {
307 if (c == *d && lc != '\\' && p == 0) {
313 if (limit > 0 && (i >= limit || (size_t)(t-token) >= limit)) {
319 if (c == '\\' && lc == '\\') {
336 if(*del == '"') /* do not skip over quotes, they are significant */
337 ldns_bskipcs(b, del+1);
338 else ldns_bskipcs(b, del);
349 ldns_bskipcs(ldns_buffer *buffer, const char *s)
355 while(ldns_buffer_available_at(buffer, buffer->_position, sizeof(char))) {
356 c = (char) ldns_buffer_read_u8_at(buffer, buffer->_position);
358 for (d = s; *d; d++) {
363 if (found && buffer->_limit > buffer->_position) {
364 buffer->_position += sizeof(char);
372 ldns_fskipcs(FILE *fp, const char *s)
374 ldns_fskipcs_l(fp, s, NULL);
378 ldns_fskipcs_l(FILE *fp, const char *s, int *line_nr)
384 while ((c = fgetc(fp)) != EOF) {
385 if (line_nr && c == '\n') {
386 *line_nr = *line_nr + 1;
389 for (d = s; *d; d++) {
395 /* with getc, we've read too far */
403 ldns_bget_keyword_data(ldns_buffer *b, const char *keyword, const char *k_del, char
404 *data, const char *d_del, size_t data_limit)
406 /* we assume: keyword|sep|data */
410 if(strlen(keyword) >= LDNS_MAX_KEYWORDLEN)
412 fkeyword = LDNS_XMALLOC(char, LDNS_MAX_KEYWORDLEN);
414 return -1; /* out of memory */
416 i = ldns_bget_token(b, fkeyword, k_del, data_limit);
419 return -1; /* nothing read */
423 if (strncmp(fkeyword, keyword, strlen(keyword)) == 0) {
425 /* whee, the match! */
426 /* retrieve it's data */
427 i = ldns_bget_token(b, data, d_del, 0);