2 * Copyright (c) 2009-2011 Alex Hornung <alex@alexhornung.com>.
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in
13 * the documentation and/or other materials provided with the
16 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
18 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
19 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
20 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING,
22 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
24 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
39 #define _iswhitespace(X) ((((X) == ' ') || ((X) == '\t'))?1:0)
42 static int line_no = 1;
44 static int iswhitespace(char c)
46 return _iswhitespace(c);
49 static int iscomma(char c)
55 syntax_error(const char *fmt, ...)
61 vsnprintf(buf, sizeof(buf), fmt, ap);
63 errx(1, "syntax error on line %d: %s\n", line_no, buf);
68 entry_check_num_args(char **tokens, int num)
72 for (i = 0; tokens[i] != NULL; i++)
76 syntax_error("at least %d tokens were expected but only %d "
77 "were found", num, i);
84 line_tokenize(char *buffer, int (*is_sep)(char), char comment_char, char **tokens)
89 i = strlen(buffer) + 1;
92 /* Skip leading white-space */
93 while ((_iswhitespace(buffer[c])) && (c < i)) c++;
96 * If this line effectively (after indentation) begins with the comment
97 * character, we ignore the rest of the line.
99 if (buffer[c] == comment_char)
102 tokens[0] = &buffer[c];
103 for (n = 1; c < i; c++) {
104 if (buffer[c] == '"') {
107 if ((c >= 1) && (&buffer[c] != tokens[n-1])) {
109 syntax_error("stray opening quote not "
110 "at beginning of token");
114 tokens[n-1] = &buffer[c+1];
117 if ((c < i-1) && (!is_sep(buffer[c+1]))) {
119 syntax_error("stray closing quote not "
133 if (is_sep(buffer[c])) {
135 while ((_iswhitespace(buffer[c])) && (c < i)) c++;
136 tokens[n++] = &buffer[c--];
150 process_line(FILE* fd, parser_t parser, void *arg)
157 while (((c = fgetc(fd)) != EOF) && (c != '\n')) {
158 buffer[i++] = (char)c;
159 if (i == (sizeof(buffer) -1))
164 if (feof(fd) || ferror(fd))
168 n = line_tokenize(buffer, &iswhitespace, '#', tokens);
171 * If there are not enough arguments for any function or it is
172 * a line full of whitespaces, we just return here. Or if a
173 * quote wasn't closed.
175 if ((n < 1) || (tokens[0][0] == '\0'))
184 parse_options(char *str, char **options)
188 i = line_tokenize(str, &iscomma, '#', options);
190 syntax_error("Invalid expression in options token");
197 process_file(const char *file, parser_t parser, void *arg, int *nlines)
203 fd = fopen(file, "r");
208 while (process_line(fd, parser, arg) == 0)