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/********************************************************************
* *
* THIS FILE IS PART OF THE OggVorbis SOFTWARE CODEC SOURCE CODE. *
* USE, DISTRIBUTION AND REPRODUCTION OF THIS SOURCE IS GOVERNED BY *
* THE GNU PUBLIC LICENSE 2, WHICH IS INCLUDED WITH THIS SOURCE. *
* PLEASE READ THESE TERMS BEFORE DISTRIBUTING. *
* *
* THE Ogg123 SOURCE CODE IS (C) COPYRIGHT 2000-2001 *
* by Kenneth C. Arnold <ogg@arnoldnet.net> AND OTHER CONTRIBUTORS *
* http://www.xiph.org/ *
* *
********************************************************************
last mod: $Id: cfgfile_options.c,v 1.3 2002/01/26 11:06:37 segher Exp $
********************************************************************/
/* if strcasecmp is giving you problems, switch to strcmp or the appropriate
* function for your platform / compiler.
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <limits.h> /* for LONG_MAX / LONG_MIN */
#include <errno.h>
#include "cfgfile_options.h"
#include "status.h"
#include "i18n.h"
/* ------------------- Private Functions ---------------------- */
int print_space (FILE *f, int s, int c)
{
int tmp = 0;
do {
fputc (c, f);
tmp++;
} while (--s > 0);
return tmp;
}
int parse_error (parse_code_t pcode, int lineno, const char *filename,
char *line)
{
if (pcode == parse_syserr) {
if (errno != EEXIST && errno != ENOENT)
perror (_("System error"));
return -1;
} else {
status_error (_("=== Parse error: %s on line %d of %s (%s)\n"),
parse_error_string(pcode),
lineno, filename, line);
return 0;
}
}
/* ------------------- Public Interface ----------------------- */
void file_options_init (file_option_t opts[])
{
while (opts && opts->name) {
opts->found = 0;
if (opts->dfl) {
switch (opts->type) {
case opt_type_none:
/* do nothing */
break;
case opt_type_char:
*(char *) opts->ptr = *(char*) opts->dfl;
break;
case opt_type_string:
*(char **) opts->ptr = *(char **) opts->dfl;
break;
case opt_type_bool:
case opt_type_int:
*(long int *) opts->ptr = *(int *) opts->dfl;
break;
case opt_type_float:
*(float *) opts->ptr = *(float *) opts->dfl;
break;
case opt_type_double:
*(double *) opts->ptr = *(double *) opts->dfl;
break;
}
}
opts++;
}
}
/* DescribeOptions - describe available options to outfile */
void file_options_describe (file_option_t opts[], FILE *f)
{
/* name | description | type | default */
int colWidths[] = {0, 0, 7, 7};
int totalWidth = 0;
file_option_t *opt = opts;
while (opt->name) {
int len = strlen (opt->name) + 1;
if (len > colWidths[0])
colWidths[0] = len;
opt++;
}
opt = opts;
while (opt->name) {
int len = strlen (opt->desc) + 1;
if (len > colWidths[1])
colWidths[1] = len;
opt++;
}
/* Column headers */
/* Name */
totalWidth += fprintf (f, "%-*s", colWidths[0], _("Name"));
/* Description */
totalWidth += fprintf (f, "%-*s", colWidths[1], _("Description"));
/* Type */
totalWidth += fprintf (f, "%-*s", colWidths[2], _("Type"));
/* Default */
totalWidth += fprintf (f, "%-*s", colWidths[3], _("Default"));
fputc ('\n', f);
/* Divider */
print_space (f, totalWidth, '-');
fputc ('\n', f);
opt = opts;
while (opt->name)
{
/* name */
int w = colWidths[0];
w -= fprintf (f, "%s", opt->name);
print_space (f, w, ' ');
/* description */
w = colWidths[1];
w -= fprintf (f, "%s", opt->desc);
print_space (f, w, ' ');
/* type */
w = colWidths[2];
switch (opt->type) {
case opt_type_none:
w -= fprintf (f, _("none"));
break;
case opt_type_bool:
w -= fprintf (f, _("bool"));
break;
case opt_type_char:
w -= fprintf (f, _("char"));
break;
case opt_type_string:
w -= fprintf (f, _("string"));
break;
case opt_type_int:
w -= fprintf (f, _("int"));
break;
case opt_type_float:
w -= fprintf (f, _("float"));
break;
case opt_type_double:
w -= fprintf (f, _("double"));
break;
default:
w -= fprintf (f, _("other"));
}
print_space (f, w, ' ');
/* default */
if (opt->dfl == NULL)
fputs (_("(NULL)"), f);
else {
switch (opt->type) {
case opt_type_none:
fputs (_("(none)"), f);
break;
case opt_type_char:
fputc (*(char *) opt->dfl, f);
break;
case opt_type_string:
fputs (*(char **) opt->dfl, f);
break;
case opt_type_bool:
case opt_type_int:
fprintf (f, "%ld", *(long int *) opt->dfl);
break;
case opt_type_float:
fprintf (f, "%f", (double) (*(float *) opt->dfl));
break;
case opt_type_double:
fprintf (f, "%f", *(double *) opt->dfl);
break;
}
}
fputc ('\n', f);
opt++;
}
}
parse_code_t parse_line (file_option_t opts[], char *line)
{
char *equals, *value = "";
file_option_t *opt;
int len;
/* skip leading whitespace */
while (line[0] == ' ')
line++;
/* remove comments */
equals = strchr (line, '#');
if (equals)
*equals = '\0';
/* return if only whitespace on line */
if (!line[0] || line[0] == '#')
return parse_ok;
/* check for an '=' and set to \0 */
equals = strchr (line, '=');
if (equals) {
value = equals + 1;
*equals = '\0';
}
/* cut trailing whitespace from key (line = key now) */
while ((equals = strrchr(line, ' ')))
*equals = '\0';
/* remove this if you want a zero-length key */
if (strlen(line) == 0)
return parse_nokey;
if (value) {
/* cut leading whitespace from value */
while (*value == ' ')
value++;
/* cut trailing whitespace from value */
len = strlen (value);
while (len > 0 && value[len-1] == ' ') {
len--;
value[len] = '\0';
}
}
/* now key is in line and value is in value. Search for a matching option. */
opt = opts;
while (opt->name) {
if (!strcasecmp (opt->name, line)) {
long tmpl;
char *endptr;
/* found the key. now set the value. */
switch (opt->type) {
case opt_type_none:
if (value != NULL || strlen(value) > 0)
return parse_badvalue;
opt->found++;
break;
case opt_type_bool:
if (!value || *value == '\0')
return parse_badvalue;
/* Maybe this is a numeric bool */
tmpl = strtol (value, &endptr, 0);
if ( strncasecmp(value, "y", 1) == 0
|| strcasecmp(value, "true")
|| (*endptr == '\0' && tmpl) )
*(long int *) opt->ptr = 1;
else if ( strncasecmp(value, "n", 1) == 0
|| strcasecmp(value, "false")
|| (*endptr == '\0' && !tmpl) )
*(long int *) opt->ptr = 0;
else
return parse_badvalue;
break;
case opt_type_char:
if (strlen(value) != 1)
return parse_badvalue;
opt->found++;
*(char *) opt->ptr = value[0];
break;
case opt_type_string:
opt->found++;
if (*(char **)opt->ptr) free(*(char **)opt->ptr);
*(char **) opt->ptr = strdup (value);
break;
case opt_type_int:
if (!value || *value == '\0')
return parse_badvalue;
tmpl = strtol (value, &endptr, 0);
if (((tmpl == LONG_MIN || tmpl == LONG_MAX) && errno == ERANGE)
|| (*endptr != '\0'))
return parse_badvalue;
opt->found++;
*(long int *) opt->ptr = tmpl;
break;
case opt_type_float:
if (!value || *value == '\0')
return parse_badvalue;
opt->found++;
*(float *) opt->ptr = atof (value);
break;
case opt_type_double:
if (!value || *value == '\0')
return parse_badvalue;
opt->found++;
*(double *) opt->ptr = atof (value);
break;
default:
return parse_badtype;
}
return parse_ok;
}
opt++;
}
return parse_keynotfound;
}
parse_code_t parse_config_file (file_option_t opts[], const char *filename)
{
unsigned int len=80;
char *line = malloc(len);
int readoffset, thischar, lineno;
FILE *file;
parse_code_t pcode;
char empty[] = "";
if (!line) {
parse_error(parse_syserr, 0, empty, empty);
return parse_syserr;
}
file = fopen (filename, "r");
if (!file) {
parse_error (parse_syserr, 0, empty, empty);
free (line);
return parse_syserr;
}
lineno = 0;
while (!feof (file)) {
lineno++;
readoffset = 0;
memset (line, 0, len);
while ((thischar = fgetc(file)) != EOF) {
if (readoffset + 1 > len) {
len *= 2;
line = realloc (line, len);
if (!line)
{
parse_error(parse_syserr, 0, empty, empty);
fclose (file);
return parse_syserr;
}
}
if (thischar == '\n') {
line[readoffset] = '\0';
break;
}
else
line[readoffset] = (unsigned char) thischar;
readoffset++;
}
pcode = parse_line (opts, line);
if (pcode != parse_ok)
if (!parse_error(pcode, lineno, filename, line)) {
free (line);
return pcode;
}
}
free (line);
return parse_ok;
}
/* ParseErr - returns a string corresponding to parse code pcode */
const char *parse_error_string (parse_code_t pcode)
{
switch (pcode) {
case parse_ok:
return _("Success");
case parse_syserr:
return strerror(errno);
case parse_keynotfound:
return _("Key not found");
case parse_nokey:
return _("No key");
case parse_badvalue:
return _("Bad value");
case parse_badtype:
return _("Bad type in options list");
default:
return _("Unknown error");
}
}
void parse_std_configs (file_option_t opts[])
{
char filename[FILENAME_MAX];
char *homedir = getenv("HOME");
parse_config_file(opts, "/etc/ogg123rc");
if (homedir && strlen(homedir) < FILENAME_MAX - 10) {
/* Try ~/.ogg123 */
strncpy(filename, homedir, FILENAME_MAX);
strcat(filename, "/.ogg123rc");
parse_config_file(opts, filename);
}
}