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;
125 /* check if we hit the delim */
126 for (d = del; *d; d++) {
127 if (c == *d && i > 0 && prev_c != '\\') {
128 if (c == '\n' && line_nr) {
129 *line_nr = *line_nr + 1;
134 if (c != '\0' && c != '\n') {
138 if (limit > 0 && i >= limit) {
142 if (c == '\\' && prev_c == '\\')
161 ldns_fskipcs_l(f, delim, line_nr);
171 ldns_fget_keyword_data(FILE *f, const char *keyword, const char *k_del, char *data,
172 const char *d_del, size_t data_limit)
174 return ldns_fget_keyword_data_l(f, keyword, k_del, data, d_del,
179 ldns_fget_keyword_data_l(FILE *f, const char *keyword, const char *k_del, char *data,
180 const char *d_del, size_t data_limit, int *line_nr)
182 /* we assume: keyword|sep|data */
186 fkeyword = LDNS_XMALLOC(char, LDNS_MAX_KEYWORDLEN);
190 i = ldns_fget_token(f, fkeyword, k_del, LDNS_MAX_KEYWORDLEN);
196 /* case??? i instead of strlen? */
197 if (strncmp(fkeyword, keyword, LDNS_MAX_KEYWORDLEN - 1) == 0) {
199 /* printf("%s\n%s\n", "Matching keyword", fkeyword); */
200 i = ldns_fget_token_l(f, data, d_del, data_limit, line_nr);
204 /*printf("no match for %s (read: %s)\n", keyword, fkeyword);*/
212 ldns_bget_token(ldns_buffer *b, char *token, const char *delim, size_t limit)
215 int p; /* 0 -> no parenthese seen, >0 nr of ( seen */
222 /* standard delimiters */
224 /* from isspace(3) */
225 del = LDNS_PARSE_NORMAL;
240 while ((c = ldns_bgetc(b)) != EOF) {
241 if (c == '(' && lc != '\\' && !quoted) {
242 /* this only counts for non-comments */
250 if (c == ')' && lc != '\\' && !quoted) {
251 /* this only counts for non-comments */
265 /* do something with comments ; */
266 if (c == ';' && quoted == 0) {
271 if (c == '"' && com == 0 && lc != '\\') {
275 if (c == '\n' && com != 0) {
289 if (c == '\n' && p != 0) {
296 /* check if we hit the delim */
297 for (d = del; *d; d++) {
298 if (c == *d && lc != '\\') {
305 if (limit > 0 && i >= limit) {
310 if (c == '\\' && lc == '\\') {
327 ldns_bskipcs(b, delim);
337 ldns_bskipc(ldns_buffer *buffer, char c)
339 while (c == (char) ldns_buffer_read_u8_at(buffer, ldns_buffer_position(buffer))) {
340 if (ldns_buffer_available_at(buffer,
341 buffer->_position + sizeof(char), sizeof(char))) {
342 buffer->_position += sizeof(char);
350 ldns_bskipcs(ldns_buffer *buffer, const char *s)
356 while(ldns_buffer_available_at(buffer, buffer->_position, sizeof(char))) {
357 c = (char) ldns_buffer_read_u8_at(buffer, buffer->_position);
359 for (d = s; *d; d++) {
364 if (found && buffer->_limit > buffer->_position) {
365 buffer->_position += sizeof(char);
373 ldns_fskipc(FILE *fp, char c)
381 ldns_fskipcs(FILE *fp, const char *s)
383 ldns_fskipcs_l(fp, s, NULL);
387 ldns_fskipcs_l(FILE *fp, const char *s, int *line_nr)
393 while ((c = fgetc(fp)) != EOF) {
394 if (line_nr && c == '\n') {
395 *line_nr = *line_nr + 1;
398 for (d = s; *d; d++) {
404 /* with getc, we've read too far */
412 ldns_bget_keyword_data(ldns_buffer *b, const char *keyword, const char *k_del, char
413 *data, const char *d_del, size_t data_limit)
415 /* we assume: keyword|sep|data */
419 fkeyword = LDNS_XMALLOC(char, LDNS_MAX_KEYWORDLEN);
421 return -1; /* out of memory */
423 i = ldns_bget_token(b, fkeyword, k_del, data_limit);
426 return -1; /* nothing read */
430 if (strncmp(fkeyword, keyword, strlen(keyword)) == 0) {
432 /* whee, the match! */
433 /* retrieve it's data */
434 i = ldns_bget_token(b, data, d_del, 0);