*
* Copyright (C) 2008 by Vladimir Dronnikov <dronnikov@gmail.com>
*
- * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
+ * Also for use in uClibc (http://uclibc.org/) licensed under LGPLv2.1 or later.
*/
#include "libbb.h"
-#if ENABLE_PARSE
+#if defined ENABLE_PARSE && ENABLE_PARSE
int parse_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int parse_main(int argc UNUSED_PARAM, char **argv)
{
return config_open2(filename, fopen_or_warn_stdin);
}
-static void config_free_data(parser_t *const parser)
+static void config_free_data(parser_t *parser)
{
free(parser->line);
parser->line = NULL;
0. If parser is NULL return 0.
1. Read a line from config file. If nothing to read then return 0.
Handle continuation character. Advance lineno for each physical line.
- Discard everything past comment characher.
+ Discard everything past comment character.
2. if PARSE_TRIM is set (default), remove leading and trailing delimiters.
3. If resulting line is empty goto 1.
4. Look for first delimiter. If !PARSE_COLLAPSE or !PARSE_TRIM is set then
#undef config_read
int FAST_FUNC config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims)
{
- char *line, *q;
- char comment;
- int ii;
- int ntokens;
- int mintokens;
+ char *line;
+ int ntokens, mintokens;
+ int t, len;
- comment = *delims++;
- ntokens = flags & 0xFF;
- mintokens = (flags & 0xFF00) >> 8;
+ ntokens = (uint8_t)flags;
+ mintokens = (uint8_t)(flags >> 8);
- again:
- memset(tokens, 0, sizeof(tokens[0]) * ntokens);
- if (!parser)
+ if (parser == NULL)
return 0;
+
+again:
+ memset(tokens, 0, sizeof(tokens[0]) * ntokens);
config_free_data(parser);
- while (1) {
-//TODO: speed up xmalloc_fgetline by internally using fgets, not fgetc
- line = xmalloc_fgetline(parser->fp);
- if (!line)
- return 0;
+ /* Read one line (handling continuations with backslash) */
+ line = bb_get_chunk_with_continuation(parser->fp, &len, &parser->lineno);
+ if (line == NULL)
+ return 0;
+ parser->line = line;
- parser->lineno++;
- // handle continuations. Tito's code stolen :)
- while (1) {
- ii = strlen(line);
- if (!ii)
- goto next_line;
- if (line[ii - 1] != '\\')
- break;
- // multi-line object
- line[--ii] = '\0';
-//TODO: add xmalloc_fgetline-like iface but with appending to existing str
- q = xmalloc_fgetline(parser->fp);
- if (!q)
- break;
- parser->lineno++;
- line = xasprintf("%s%s", line, q);
- free(q);
- }
- // discard comments
- if (comment) {
- q = strchrnul(line, comment);
- *q = '\0';
- ii = q - line;
- }
- // skip leading and trailing delimiters
- if (flags & PARSE_TRIM) {
- // skip leading
- int n = strspn(line, delims);
- if (n) {
- ii -= n;
- overlapping_strcpy(line, line + n);
- }
- // cut trailing
- if (ii) {
- while (strchr(delims, line[--ii]))
- continue;
- line[++ii] = '\0';
- }
- }
- // if something still remains -> return it
- if (ii)
- break;
+ /* Strip trailing line-feed if any */
+ if (len && line[len-1] == '\n')
+ line[len-1] = '\0';
- next_line:
- // skip empty line
- free(line);
- }
- // non-empty line found, parse and return the number of tokens
+ /* Skip token in the start of line? */
+ if (flags & PARSE_TRIM)
+ line += strspn(line, delims + 1);
- // store line
- parser->line = line = xrealloc(line, ii + 1);
- if (flags & PARSE_KEEP_COPY) {
+ if (line[0] == '\0' || line[0] == delims[0])
+ goto again;
+
+ if (flags & PARSE_KEEP_COPY)
parser->data = xstrdup(line);
- }
- // split line to tokens
- ntokens--; // now it's max allowed token no
- // N.B. non-empty remainder is also a token,
- // so if ntokens <= 1, we just return the whole line
- // N.B. if PARSE_GREEDY is set the remainder of the line is stuck to the last token
- ii = 0;
- while (*line && ii <= ntokens) {
- //bb_info_msg("L[%s]", line);
- // get next token
- // at last token and need greedy token ->
- if ((flags & PARSE_GREEDY) && (ii == ntokens)) {
- // skip possible delimiters
- if (flags & PARSE_COLLAPSE)
- line += strspn(line, delims);
- // don't cut the line
- q = line + strlen(line);
+ /* Tokenize the line */
+ t = 0;
+ do {
+ /* Pin token */
+ tokens[t] = line;
+
+ /* Combine remaining arguments? */
+ if ((t != (ntokens-1)) || !(flags & PARSE_GREEDY)) {
+ /* Vanilla token, find next delimiter */
+ line += strcspn(line, delims[0] ? delims : delims + 1);
} else {
- // vanilla token. cut the line at the first delim
- q = line + strcspn(line, delims);
- if (*q) // watch out: do not step past the line end!
- *q++ = '\0';
+ /* Combining, find comment char if any */
+ line = strchrnul(line, delims[0]);
+
+ /* Trim any extra delimiters from the end */
+ if (flags & PARSE_TRIM) {
+ while (strchr(delims + 1, line[-1]) != NULL)
+ line--;
+ }
}
- // pin token
- if (!(flags & (PARSE_COLLAPSE | PARSE_TRIM)) || *line) {
- //bb_info_msg("N[%d] T[%s]", ii, line);
- tokens[ii++] = line;
- // process escapes in token
-#if 0 // unused so far
- if (flags & PARSE_ESCAPE) {
- char *s = line;
- while (*s) {
- if (*s == '\\') {
- s++;
- *line++ = bb_process_escape_sequence((const char **)&s);
- } else {
- *line++ = *s++;
- }
+
+ /* Token not terminated? */
+ if (*line == delims[0])
+ *line = '\0';
+ else if (*line != '\0')
+ *line++ = '\0';
+
+#if 0 /* unused so far */
+ if (flags & PARSE_ESCAPE) {
+ const char *from;
+ char *to;
+
+ from = to = tokens[t];
+ while (*from) {
+ if (*from == '\\') {
+ from++;
+ *to++ = bb_process_escape_sequence(&from);
+ } else {
+ *to++ = *from++;
}
- *line = '\0';
}
-#endif
+ *to = '\0';
}
- line = q;
- //bb_info_msg("A[%s]", line);
- }
+#endif
+ /* Skip possible delimiters */
+ if (flags & PARSE_COLLAPSE)
+ line += strspn(line, delims + 1);
+
+ t++;
+ } while (*line && *line != delims[0] && t < ntokens);
- if (ii < mintokens) {
+ if (t < mintokens) {
bb_error_msg("bad line %u: %d tokens found, %d needed",
- parser->lineno, ii, mintokens);
+ parser->lineno, t, mintokens);
if (flags & PARSE_MIN_DIE)
xfunc_die();
- ntokens++;
+ if (flags & PARSE_KEEP_COPY)
+ free(parser->data);
goto again;
}
- return ii;
+ return t;
}
projects / oweals / busybox.git / blobdiff