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 == '(' && prev_c != '\\' && !quoted) {
60 /* this only counts for non-comments */
68 if (c == ')' && prev_c != '\\' && !quoted) {
69 /* this only counts for non-comments */
78 /* more ) then ( - close off the string */
83 /* do something with comments ; */
84 if (c == ';' && quoted == 0) {
89 if (c == '\"' && com == 0 && prev_c != '\\') {
93 if (c == '\n' && com != 0) {
98 *line_nr = *line_nr + 1;
100 if (p == 0 && i > 0) {
115 if (c == '\n' && p != 0 && t > token) {
118 *line_nr = *line_nr + 1;
124 /* check if we hit the delim */
125 for (d = del; *d; d++) {
126 if (c == *d && i > 0 && prev_c != '\\') {
127 if (c == '\n' && line_nr) {
128 *line_nr = *line_nr + 1;
133 if (c != '\0' && c != '\n') {
137 if (limit > 0 && i >= limit) {
141 if (c == '\\' && prev_c == '\\')
160 ldns_fskipcs_l(f, delim, line_nr);
170 ldns_fget_keyword_data(FILE *f, const char *keyword, const char *k_del, char *data,
171 const char *d_del, size_t data_limit)
173 return ldns_fget_keyword_data_l(f, keyword, k_del, data, d_del,
178 ldns_fget_keyword_data_l(FILE *f, const char *keyword, const char *k_del, char *data,
179 const char *d_del, size_t data_limit, int *line_nr)
181 /* we assume: keyword|sep|data */
185 fkeyword = LDNS_XMALLOC(char, LDNS_MAX_KEYWORDLEN);
188 i = ldns_fget_token(f, fkeyword, k_del, LDNS_MAX_KEYWORDLEN);
190 /* case??? i instead of strlen? */
191 if (strncmp(fkeyword, keyword, LDNS_MAX_KEYWORDLEN - 1) == 0) {
193 /* printf("%s\n%s\n", "Matching keyword", fkeyword); */
194 i = ldns_fget_token_l(f, data, d_del, data_limit, line_nr);
198 /*printf("no match for %s (read: %s)\n", keyword, fkeyword);*/
206 ldns_bget_token(ldns_buffer *b, char *token, const char *delim, size_t limit)
209 int p; /* 0 -> no parenthese seen, >0 nr of ( seen */
216 /* standard delimiters */
218 /* from isspace(3) */
219 del = LDNS_PARSE_NORMAL;
230 if (delim[0] == '"') {
234 while ((c = ldns_bgetc(b)) != EOF) {
235 if (c == '(' && lc != '\\' && !quoted) {
236 /* this only counts for non-comments */
244 if (c == ')' && lc != '\\' && !quoted) {
245 /* this only counts for non-comments */
260 /* do something with comments ; */
261 if (c == ';' && quoted == 0) {
266 if (c == '"' && com == 0 && lc != '\\') {
270 if (c == '\n' && com != 0) {
284 if (c == '\n' && p != 0) {
290 /* check if we hit the delim */
291 for (d = del; *d; d++) {
292 if (c == *d && lc != '\\') {
299 if (limit > 0 && i >= limit - 1) {
304 if (c == '\\' && lc == '\\') {
321 ldns_bskipcs(b, delim);
331 ldns_bskipc(ldns_buffer *buffer, char c)
333 while (c == (char) ldns_buffer_read_u8_at(buffer, ldns_buffer_position(buffer))) {
334 if (ldns_buffer_available_at(buffer,
335 buffer->_position + sizeof(char), sizeof(char))) {
336 buffer->_position += sizeof(char);
344 ldns_bskipcs(ldns_buffer *buffer, const char *s)
350 while(ldns_buffer_available_at(buffer, buffer->_position, sizeof(char))) {
351 c = (char) ldns_buffer_read_u8_at(buffer, buffer->_position);
353 for (d = s; *d; d++) {
358 if (found && buffer->_limit > buffer->_position) {
359 buffer->_position += sizeof(char);
367 ldns_fskipc(FILE *fp, char c)
375 ldns_fskipcs(FILE *fp, const char *s)
377 ldns_fskipcs_l(fp, s, NULL);
381 ldns_fskipcs_l(FILE *fp, const char *s, int *line_nr)
387 while ((c = fgetc(fp)) != EOF) {
388 if (line_nr && c == '\n') {
389 *line_nr = *line_nr + 1;
392 for (d = s; *d; d++) {
398 /* with getc, we've read too far */
406 ldns_bget_keyword_data(ldns_buffer *b, const char *keyword, const char *k_del, char
407 *data, const char *d_del, size_t data_limit)
409 /* we assume: keyword|sep|data */
413 fkeyword = LDNS_XMALLOC(char, LDNS_MAX_KEYWORDLEN);
416 i = ldns_bget_token(b, fkeyword, k_del, data_limit);
419 if (strncmp(fkeyword, keyword, strlen(keyword)) == 0) {
420 /* whee, the match! */
421 /* retrieve it's data */
422 i = ldns_bget_token(b, data, d_del, 0);