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) {
142 if (c != '\0' && c != '\n') {
145 if (c == '\\' && prev_c == '\\')
164 ldns_fskipcs_l(f, del, line_nr);
174 ldns_fget_keyword_data(FILE *f, const char *keyword, const char *k_del, char *data,
175 const char *d_del, size_t data_limit)
177 return ldns_fget_keyword_data_l(f, keyword, k_del, data, d_del,
182 ldns_fget_keyword_data_l(FILE *f, const char *keyword, const char *k_del, char *data,
183 const char *d_del, size_t data_limit, int *line_nr)
185 /* we assume: keyword|sep|data */
189 if(strlen(keyword) >= LDNS_MAX_KEYWORDLEN)
191 fkeyword = LDNS_XMALLOC(char, LDNS_MAX_KEYWORDLEN);
195 i = ldns_fget_token(f, fkeyword, k_del, LDNS_MAX_KEYWORDLEN);
201 /* case??? i instead of strlen? */
202 if (strncmp(fkeyword, keyword, LDNS_MAX_KEYWORDLEN - 1) == 0) {
204 /* printf("%s\n%s\n", "Matching keyword", fkeyword); */
205 i = ldns_fget_token_l(f, data, d_del, data_limit, line_nr);
209 /*printf("no match for %s (read: %s)\n", keyword, fkeyword);*/
217 ldns_bget_token(ldns_buffer *b, char *token, const char *delim, size_t limit)
220 int p; /* 0 -> no parenthese seen, >0 nr of ( seen */
227 /* standard delimiters */
229 /* from isspace(3) */
230 del = LDNS_PARSE_NORMAL;
245 while ((c = ldns_bgetc(b)) != EOF) {
246 if (c == '\r') /* carriage return */
248 if (c == '(' && lc != '\\' && !quoted) {
249 /* this only counts for non-comments */
257 if (c == ')' && lc != '\\' && !quoted) {
258 /* this only counts for non-comments */
272 /* do something with comments ; */
273 if (c == ';' && quoted == 0) {
278 if (c == '"' && com == 0 && lc != '\\') {
282 if (c == '\n' && com != 0) {
296 if (c == '\n' && p != 0) {
303 /* check if we hit the delim */
304 for (d = del; *d; d++) {
305 if (c == *d && lc != '\\' && p == 0) {
311 if (limit > 0 && i >= limit) {
317 if (c == '\\' && lc == '\\') {
334 ldns_bskipcs(b, del);
345 ldns_bskipcs(ldns_buffer *buffer, const char *s)
351 while(ldns_buffer_available_at(buffer, buffer->_position, sizeof(char))) {
352 c = (char) ldns_buffer_read_u8_at(buffer, buffer->_position);
354 for (d = s; *d; d++) {
359 if (found && buffer->_limit > buffer->_position) {
360 buffer->_position += sizeof(char);
368 ldns_fskipcs(FILE *fp, const char *s)
370 ldns_fskipcs_l(fp, s, NULL);
374 ldns_fskipcs_l(FILE *fp, const char *s, int *line_nr)
380 while ((c = fgetc(fp)) != EOF) {
381 if (line_nr && c == '\n') {
382 *line_nr = *line_nr + 1;
385 for (d = s; *d; d++) {
391 /* with getc, we've read too far */
399 ldns_bget_keyword_data(ldns_buffer *b, const char *keyword, const char *k_del, char
400 *data, const char *d_del, size_t data_limit)
402 /* we assume: keyword|sep|data */
406 if(strlen(keyword) >= LDNS_MAX_KEYWORDLEN)
408 fkeyword = LDNS_XMALLOC(char, LDNS_MAX_KEYWORDLEN);
410 return -1; /* out of memory */
412 i = ldns_bget_token(b, fkeyword, k_del, data_limit);
415 return -1; /* nothing read */
419 if (strncmp(fkeyword, keyword, strlen(keyword)) == 0) {
421 /* whee, the match! */
422 /* retrieve it's data */
423 i = ldns_bget_token(b, data, d_del, 0);