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/* vi: set expandtab sw=4 sts=4: */
/* parse_util.c - the opkg package management system
Copyright (C) 2009 Ubiq Technologies <graham.gower@gmail.com>
Steven M. Ayer
Copyright (C) 2002 Compaq Computer Corporation
SPDX-License-Identifier: GPL-2.0-or-later
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation; either version 2, or (at
your option) any later version.
This program is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
*/
#include "config.h"
#include <ctype.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include "opkg_message.h"
#include "opkg_utils.h"
#include "xfuncs.h"
#include "parse_util.h"
int is_field(const char *type, const char *line)
{
if (strncmp(line, type, strlen(type)) == 0)
return 1;
return 0;
}
char *parse_simple(const char *type, const char *line)
{
char *field = trim_xstrdup(line + strlen(type) + 1);
if (strlen(field) == 0) {
free(field);
return NULL;
}
return field;
}
/*
* Parse a comma separated string into an array.
*/
char **parse_list(const char *raw, unsigned int *count, const char sep,
int skip_field)
{
char **depends = NULL;
const char *start, *end;
int line_count = 0;
/* skip past the "Field:" marker */
if (!skip_field) {
while (*raw && *raw != ':')
raw++;
raw++;
}
if (line_is_blank(raw)) {
*count = line_count;
return NULL;
}
while (*raw) {
depends = xrealloc(depends, sizeof(char *) * (line_count + 1));
while (isspace(*raw))
raw++;
start = raw;
while (*raw != sep && *raw)
raw++;
end = raw;
while (end > start && isspace(*end))
end--;
if (sep == ' ')
end++;
depends[line_count] = xstrndup(start, end - start);
line_count++;
if (*raw == sep)
raw++;
}
*count = line_count;
return depends;
}
int parse_from_stream_nomalloc(parse_line_t parse_line, void *ptr, FILE * fp,
uint mask, char **buf0, size_t buf0len)
{
int ret, lineno;
char *buf, *nl;
size_t buflen;
char *s;
int r;
lineno = 1;
ret = 0;
buflen = buf0len;
buf = *buf0;
buf[0] = '\0';
while (1) {
s = fgets(buf, (int)buflen, fp);
if (s == NULL) {
if (ferror(fp)) {
opkg_perror(ERROR, "fgets");
ret = -1;
} else if (strlen(*buf0) == buf0len - 1) {
opkg_msg(ERROR,
"Missing new line character" " at end of file!\n");
parse_line(ptr, *buf0, mask);
}
break;
}
nl = strchr(buf, '\n');
if (nl == NULL) {
if (strlen(buf) < buflen - 1) {
/*
* Line could be exactly buflen-1 long and
* missing a newline, but we won't know until
* fgets fails to read more data.
*/
opkg_msg(ERROR,
"Missing new line character" " at end of file!\n");
parse_line(ptr, *buf0, mask);
break;
}
if (buf0len >= EXCESSIVE_LINE_LEN) {
opkg_msg(ERROR,
"Excessively long line at " "%d. Corrupt file?\n",
lineno);
ret = -1;
break;
}
/*
* Realloc and point buf past the data already read,
* at the NULL terminator inserted by fgets.
* |<--------------- buf0len ----------------->|
* | |<------- buflen ---->|
* |---------------------|---------------------|
* buf0 buf
*/
buflen = buf0len + 1;
buf0len *= 2;
*buf0 = xrealloc(*buf0, buf0len);
buf = *buf0 + buflen - 2;
continue;
}
*nl = '\0';
lineno++;
r = parse_line(ptr, *buf0, mask);
if (r != 0)
break;
buf = *buf0;
buflen = buf0len;
buf[0] = '\0';
}
return ret;
}
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