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/*
* params.c -- Device parameter file handling.
*
* Copyright (C) 2016 Tomasz Kramkowski <tk@the-tk.com>
*
* 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 3 of the License, 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.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <assert.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdbool.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>
#include <ctype.h>
#include "eprintf.h"
#include "params.h"
#include "util.h"
/* TODO: make this dynamic */
#define SZMAX_PFILE 1024
#ifndef DATADIR
#define DATADIR "hktool"
#endif
/* readparams: read a file's param definition */
static void readparams(struct flashparams *fp, const char *file)
{
char cont[SZMAX_PFILE], *pos;
size_t contsz;
FILE *f;
assert(file);
assert(fp);
f = fopen(file, "r");
if (f == NULL)
eprintf("Could not open '%s':", file);
contsz = fread(cont, 1, SZMAX_PFILE, f);
if (contsz >= sizeof cont)
eprintf("Parameter file '%s' is longer than %zu", file, sizeof cont - 1);
pos = cont;
for (int i = 0; i < 4; i++) {
char *end;
unsigned long long val;
errno = 0;
val = strtoull(pos, &end, 0);
if (pos == end)
eprintf("Parameter file '%s' is malformed (offset:%zd not a number)", file, pos - cont);
pos = end;
if (errno == ERANGE || val > SIZE_MAX)
eprintf("Parameter file '%s' is malformed (offset:%zd number too large)", file, pos - cont);
switch (i) {
case 0: fp->memsz = val; break;
case 1: fp->blksz = val; break;
case 2: fp->cmdsz = val; break;
case 3: fp->addrshft = val; break;
}
}
fclose(f);
}
static void printcname(const char *file)
{
bool wasspace;
FILE *f;
int c, field;
assert(file);
f = fopen(file, "r");
if (f == NULL) {
printf(": Malformed file '%s'", file);
return;
}
field = 0;
wasspace = false;
while (c = fgetc(f), c != EOF) {
if (isspace(c)) {
wasspace = true;
continue;
}
if (wasspace) {
wasspace = false;
field++;
}
if (field >= 4) {
ungetc(c, f);
break;
}
}
if (c == EOF)
return;
printf(": ");
while (c = fgetc(f), c != EOF)
if (c != '\n')
putchar(c);
}
/* getparams: Locate a parameter file and load it or show names of all files */
bool getparams(struct flashparams *fp, const char *name)
{
char pathbuf[PATH_MAX], *dirname, *fullpath;
struct dirent *de;
size_t pathsize;
bool found;
DIR *dir;
assert((fp == NULL && name == NULL) || (fp != NULL && name != NULL));
fullpath = pathbuf;
pathsize = sizeof pathbuf;
dirname = getenv("HKTOOL_DATADIR");
if (dirname == NULL || strlen(dirname) == 0)
dirname = DATADIR;
dir = opendir(dirname);
if (dir == NULL)
eprintf("Could not open directory '%s':", dirname);
if (name == NULL)
printf("Searching '%s' for Device Parameter Files:\n", dirname);
found = false;
while (errno = 0, de = readdir(dir), de != NULL) {
bool ismatch, doprint;
doprint = name == NULL;
if (doprint)
ismatch = strcmp(de->d_name, name) == 0;
else
ismatch = false;
if (doprint || ismatch) {
int size;
size = snprintf(NULL, 0, "%s/%s", dirname, de->d_name);
assert(size > 0);
if ((size_t)size > pathsize) {
if (fullpath == pathbuf)
fullpath = NULL;
fullpath = erealloc(fullpath, size);
pathsize = size;
}
size = snprintf(fullpath, pathsize, "%s/%s", dirname, de->d_name);
assert(size > 0);
assert((size_t)size < pathsize);
}
if (doprint) {
printf("%s", de->d_name);
printcname(fullpath);
putchar('\n');
continue;
};
if (!ismatch)
continue;
readparams(fp, fullpath);
found = true;
errno = 0;
break;
}
if (errno)
weprintf("Could not read directory '%s':", dirname);
if (fullpath != pathbuf)
free(fullpath);
if (closedir(dir) == -1)
eprintf("Could not close directory '%s':", dirname);
return found;
}
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