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/*
* Copyright (c) 2009, 2013-2016, 2018 Paul Mattes.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the names of Paul Mattes, Jeff Sparkes, GTRC nor the names of
* their contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY PAUL MATTES "AS IS" AND ANY EXPRESS OR IMPLIED
* WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
* EVENT SHALL PAUL MATTES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/*
* readres.c
* A displayless 3270 Terminal Emulator
* Resource file reader.
*/
#include "globals.h"
#include <errno.h>
#include "appres.h"
#include "glue.h"
#include "readres.h"
#include "utils.h"
/*
* Make sure a resource definition begins with the application name, then
* split it into the name and the value.
*/
int
validate_and_split_resource(const char *where, const char *arg,
const char **left, size_t *rnlenp, const char **right)
{
size_t match_len;
size_t rnlen;
const char *s = arg;
static char *me_dot = NULL;
static char *me_star = NULL;
static size_t me_len = 0;
static char *alias_dot = NULL;
static char *alias_star = NULL;
static size_t alias_len = 0;
static char *or_alias = "";
if (me_dot == NULL) {
me_dot = xs_buffer("%s.", app);
me_star = xs_buffer("%s*", app);
me_len = strlen(me_dot);
if (appres.alias != NULL) {
alias_dot = xs_buffer("%s.", appres.alias);
alias_star = xs_buffer("%s*", appres.alias);
alias_len = strlen(alias_dot);
if (strcmp(app, appres.alias)) {
or_alias = xs_buffer(" or '%s'", alias_dot);
}
}
}
/* Enforce "-3270." or "-3270*" or "*". */
if (!strncmp(s, me_dot, me_len)) {
match_len = me_len;
} else if (!strncmp(arg, me_star, me_len)) {
match_len = me_len;
} else if (alias_len != 0 && !strncmp(s, alias_dot, alias_len)) {
match_len = alias_len;
} else if (alias_len != 0 && !strncmp(arg, alias_star, alias_len)) {
match_len = alias_len;
} else if (arg[0] == '*') {
match_len = 1;
} else {
xs_warning("%s: Invalid resource syntax '%.*s', name must begin with "
"'%s', '*'%s", where, (int)me_len, arg, me_dot, or_alias);
return -1;
}
/* Separate the parts. */
s = arg + match_len;
while (*s && *s != ':' && !isspace((unsigned char)*s)) {
s++;
}
rnlen = s - (arg + match_len);
if (!rnlen) {
xs_warning("%s: Invalid resource syntax, missing resource name",
where);
return -1;
}
while (isspace((unsigned char)*s)) {
s++;
}
if (*s != ':') {
xs_warning("%s: Invalid resource syntax, missing ':'", where);
return -1;
}
s++;
while (isspace((unsigned char)*s)) {
s++;
}
/* Return what we got. */
*left = arg + match_len;
*rnlenp = rnlen;
*right = s;
return 0;
}
/* Read resources from a file. */
bool
read_resource_filex(const char *filename, bool fatal)
{
FILE *f;
size_t ilen;
char buf[4096];
char *where;
int lno = 0;
f = fopen(filename, "r");
if (f == NULL) {
if (fatal) {
xs_warning("Cannot open '%s': %s", filename, strerror(errno));
}
return false;
}
/* Merge in what's in the file into the resource database. */
ilen = 0;
while (fgets(buf + ilen, (int)(sizeof(buf) - ilen), f) != NULL ||
ilen) {
char *s;
size_t sl;
bool bsl = false;
lno++;
/* Stip any trailing newline. */
sl = strlen(buf + ilen);
if (sl && (buf + ilen)[sl-1] == '\n') {
(buf + ilen)[--sl] = '\0';
}
/* Check for a trailing backslash. */
s = buf + ilen;
if ((sl > 0) && (s[sl - 1] == '\\')) {
s[sl - 1] = '\0';
bsl = true;
}
/* Skip leading whitespace. */
s = buf;
while (isspace((unsigned char)*s)) {
s++;
}
/* If this line is a continuation, try again. */
if (bsl) {
ilen += strlen(buf + ilen);
if ((unsigned)ilen >= sizeof(buf) - 1) {
xs_warning("%s:%d: Line too long\n", filename, lno);
break;
}
continue;
}
/* Skip comments. */
if (*s == '!') {
ilen = 0;
continue;
}
if (*s == '#') {
xs_warning("%s:%d: Invalid profile syntax ('#' ignored)", filename,
lno);
ilen = 0;
continue;
}
/* Strip trailing whitespace and check for empty lines. */
sl = strlen(s);
while (sl && isspace((unsigned char)s[sl-1])) {
s[--sl] = '\0';
}
if (!sl) {
ilen = 0;
continue;
}
/* Digest it. */
where = xs_buffer("%s:%d", filename, lno);
parse_xrm(s, where);
Free(where);
/* Get ready for the next iteration. */
ilen = 0;
}
fclose(f);
return true;
}
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