/* loads a file and returns its length */
int load_file(char *file, char *at)
{
unsigned int size;
if (u_open(file, &size))
return 0;
size = u_read(at, size);
u_close();
return size;
}
int process_cfg(char *cfg)
{
// buffer for config file reading
static char s[BUFSIZE];
static int s_pos = 0;
// second buffer
static char str[BUFSIZE];
static int str_pos = 0;
char *p, *line, *q;
char f, g;
unsigned int size, sz;
unsigned int rd;
int bytes_read = 0;
int i;
if (u_open(cfg, &size)) {
printf("Cannot open config file!\r\n");
return 0;
}
u_close();
//grub_memset(s, 0, sizeof(s));
sz = size;
while (sz)
{
// read new buffer
if (u_open(cfg, &size)) {
printf("Cannot open config file!\r\n");
return 0;
}
u_seek(bytes_read);
rd = u_read(buf, sizeof(buf));
if (!rd)
{
printf("process_cfg(): read returned zero bytes\r\n");
return 0;
}
sz -= rd;
bytes_read += rd;
u_close();
if (sz && !rd)
{
printf("Can't read from config file!\r\n");
return 0;
}
f = 1;
p = buf;
while (*p && f)
{
// read new line from current buffer
line = getline(&p, rd);
i = grub_strlen(line);
if (s_pos + i > BUFSIZE)
panic("string s too long to fit in buffer!\r\n", cfg);
grub_strcpy(s + s_pos, line);
s_pos += i;
f = (p - buf < rd);
g = f || (!f && (buf[rd - 1] == '\n'));
if (g)
{
// delete CR and LF symbols at the end
line = strip(trim(s));
// skip comments ";"
i = grub_index(';', line);
if (i) line[i - 1] = '\0';
// skip comments "#"
i = grub_index('#', line);
if (i) line[i - 1] = '\0';
// delete leading and trailing spaces
line = strip(line);
// line continuation symbol ('^' or '&') support
i = grub_strlen(line);
if (line[i - 1] == '^' || line[i - 1] == '&')
{
// the current line continued
line[i - 1] = '\0';
if (str_pos + i - 1 > BUFSIZE)
panic("string str too long to fit in buffer!\r\n", cfg);
grub_strcpy(str + str_pos, line);
str_pos += i - 1;
s[0] = '\0';
s_pos = 0;
continue;
}
else
{
// the line ends
if (str_pos + i > BUFSIZE)
panic("string str too long to fit in buffer!\r\n", cfg);
grub_strcpy(str + str_pos, line);
str_pos = 0;
s[0] = '\0';
s_pos = 0;
}
// expand variables
//expand_vars(s, str);
// process the line
if (!process_cfg_line(str))
return -1;
}
}
}
return 1;
}
