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* Samba Unix/Linux SMB client library
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* Copyright (C) Gregor Beck 2010
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 3 of the License, or
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* (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* @author Gregor Beck <gb@sernet.de>
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* @brief A simple recursive parser.
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bool srprs_skipws(const char** ptr) {
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while (isspace(**ptr))
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bool srprs_char(const char** ptr, char c) {
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bool srprs_str(const char** ptr, const char* str, size_t len)
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if (memcmp(*ptr, str, len) == 0) {
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bool srprs_charset(const char** ptr, const char* set, cbuf* oss)
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const char* p = strchr(set, **ptr);
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if (p != NULL && *p != '\0') {
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cbuf_putc(oss, **ptr);
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bool srprs_charsetinv(const char** ptr, const char* set, cbuf* oss)
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if ((**ptr != '\0') && (strchr(set, **ptr) == NULL)) {
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cbuf_putc(oss, **ptr);
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bool srprs_quoted_string(const char** ptr, cbuf* str, bool* cont)
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const char* pos = *ptr;
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const size_t spos = cbuf_getpos(str);
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if (cont == NULL || *cont == false) {
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if (!srprs_char(&pos, '\"'))
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while (srprs_charsetinv(&pos, "\\\"", str))
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if (!srprs_charset(&pos, "\\\"", str))
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cbuf_setpos(str, spos);
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bool srprs_hex(const char** ptr, size_t len, unsigned* u)
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static const char* FMT[] = {
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"%1x","%2x","%3x","%4x","%5x","%6x","%7x","%8x",
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"%9x","%10x","%11x","%12x","%13x","%14x","%15x","%16x"
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const char* pos = *ptr;
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&& (len <= 2*sizeof(unsigned))
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&& (len <= sizeof(FMT)/sizeof(const char*)));
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for (i=0; i<len; i++) {
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if (!srprs_charset(&pos, "0123456789abcdefABCDEF", NULL)) {
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ret = sscanf(*ptr, FMT[len-1], u);
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bool srprs_nl(const char** ptr, cbuf* nl)
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static const char CRLF[] = "\r\n";
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if (srprs_str(ptr, CRLF, sizeof(CRLF) - 1)) {
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cbuf_puts(nl, CRLF, sizeof(CRLF) - 1);
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return srprs_charset(ptr, "\n\r", nl);
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bool srprs_eos(const char** ptr)
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return (**ptr == '\0');
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bool srprs_eol(const char** ptr, cbuf* nl)
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return srprs_eos(ptr) || srprs_nl(ptr, nl);
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bool srprs_line(const char** ptr, cbuf* str)
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while (srprs_charsetinv(ptr, "\n\r", str))
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bool srprs_quoted(const char** ptr, cbuf* str)
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const char* pos = *ptr;
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const size_t spos = cbuf_getpos(str);
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if (!srprs_char(&pos, '"')) {
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while (srprs_charsetinv(&pos, "\\\"", str))
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if (!srprs_charset(&pos, "\\\"", str)) {
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if (!srprs_hex(&pos, 2, &u)) {
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cbuf_setpos(str, spos);