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options.c
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options.c
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/*
* MOC - music on console
* Copyright (C) 2004 - 2006 Damian Pietras <daper@daper.net>
*
* 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 of the License, or
* (at your option) any later version.
*
*/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <string.h>
#include <strings.h>
#include <ctype.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <limits.h>
#include <stdarg.h>
#include <sys/types.h>
#include <regex.h>
#include "common.h"
#include "files.h"
#include "log.h"
#include "options.h"
#include "lists.h"
#define OPTIONS_MAX 181
#define OPTION_NAME_MAX 32
typedef int options_t_check (int, ...);
union option_value
{
char *str;
int num;
bool boolean;
lists_t_strs *list;
};
struct option
{
char name[OPTION_NAME_MAX];
enum option_type type;
union option_value value;
int ignore_in_config;
int set_in_config;
unsigned int hash;
options_t_check *check;
int count;
void *constraints;
};
static struct option options[OPTIONS_MAX];
static int options_num = 0;
/* Returns the str's hash using djb2 algorithm. */
static unsigned int hash (const char * str)
{
unsigned int hash = 5381;
while (*str)
hash = ((hash << 5) + hash) + tolower(*(str++));
return hash;
}
/* Return an index to an option in the options hashtable.
* If there is no such option return -1. */
static int find_option (const char *name, enum option_type type)
{
unsigned int h = hash (name), i, init_pos = h % OPTIONS_MAX;
for (i = init_pos; i < OPTIONS_MAX; i += 1) {
if (options[i].type == OPTION_FREE)
return -1;
if (h == options[i].hash && type & options[i].type) {
if (!strcasecmp (name, options[i].name))
return i;
}
}
for (i = 0; i < init_pos; i += 1) {
if (options[i].type == OPTION_FREE)
return -1;
if (h == options[i].hash && type & options[i].type) {
if (!strcasecmp (name, options[i].name))
return i;
}
}
return -1;
}
/* Return an index of a free slot in the options hashtable.
* If there is no such slot return -1. */
static int find_free (unsigned int h)
{
unsigned int i;
assert (options_num < OPTIONS_MAX);
h %= OPTIONS_MAX;
for (i = h; i < OPTIONS_MAX; i += 1) {
if (options[i].type == OPTION_FREE)
return i;
}
for (i = 0; i < h; i += 1) {
if (options[i].type == OPTION_FREE)
return i;
}
return -1;
}
/* Check that a value falls within the specified range(s). */
static int check_range (int opt, ...)
{
int rc, ix, int_val;
char *str_val;
va_list va;
assert (opt != -1);
assert (options[opt].count % 2 == 0);
assert (options[opt].type & (OPTION_INT | OPTION_STR | OPTION_LIST));
rc = 0;
va_start (va, opt);
switch (options[opt].type) {
case OPTION_INT:
int_val = va_arg (va, int);
for (ix = 0; ix < options[opt].count; ix += 2) {
if (int_val >= ((int *) options[opt].constraints)[ix] &&
int_val <= ((int *) options[opt].constraints)[ix + 1]) {
rc = 1;
break;
}
}
break;
case OPTION_STR:
case OPTION_LIST:
str_val = va_arg (va, char *);
for (ix = 0; ix < options[opt].count; ix += 2) {
if (strcasecmp (str_val, (((char **) options[opt].constraints)[ix])) >= 0 &&
strcasecmp (str_val, (((char **) options[opt].constraints)[ix + 1])) <= 0) {
rc = 1;
break;
}
}
break;
case OPTION_BOOL:
case OPTION_SYMB:
case OPTION_ANY:
case OPTION_FREE:
break;
}
va_end (va);
return rc;
}
/* Check that a value is one of the specified values. */
static int check_discrete (int opt, ...)
{
int rc, ix, int_val;
char *str_val;
va_list va;
assert (opt != -1);
assert (options[opt].type & (OPTION_INT | OPTION_SYMB | OPTION_LIST));
rc = 0;
va_start (va, opt);
switch (options[opt].type) {
case OPTION_INT:
int_val = va_arg (va, int);
for (ix = 0; ix < options[opt].count; ix += 1) {
if (int_val == ((int *) options[opt].constraints)[ix]) {
rc = 1;
break;
}
}
break;
case OPTION_SYMB:
case OPTION_LIST:
str_val = va_arg (va, char *);
for (ix = 0; ix < options[opt].count; ix += 1) {
if (!strcasecmp(str_val, (((char **) options[opt].constraints)[ix]))) {
rc = 1;
break;
}
}
break;
case OPTION_BOOL:
case OPTION_STR:
case OPTION_ANY:
case OPTION_FREE:
break;
}
va_end (va);
return rc;
}
/* Check that a string length falls within the specified range(s). */
static int check_length (int opt, ...)
{
int rc, ix, str_len;
va_list va;
assert (opt != -1);
assert (options[opt].count % 2 == 0);
assert (options[opt].type & (OPTION_STR | OPTION_LIST));
rc = 0;
va_start (va, opt);
str_len = strlen (va_arg (va, char *));
for (ix = 0; ix < options[opt].count; ix += 2) {
if (str_len >= ((int *) options[opt].constraints)[ix] &&
str_len <= ((int *) options[opt].constraints)[ix + 1]) {
rc = 1;
break;
}
}
va_end (va);
return rc;
}
/* Check that a string has a function-like syntax. */
static int check_function (int opt, ...)
{
int rc;
const char *str;
const char regex[] = "^[a-z0-9/-]+\\([^,) ]*(,[^,) ]*)*\\)$";
static regex_t *preg = NULL;
va_list va;
assert (opt != -1);
assert (options[opt].count == 0);
assert (options[opt].type & (OPTION_STR | OPTION_LIST));
if (preg == NULL) {
preg = (regex_t *)xmalloc (sizeof (regex_t));
rc = regcomp (preg, regex, REG_EXTENDED | REG_ICASE | REG_NOSUB);
assert (rc == 0);
}
va_start (va, opt);
str = va_arg (va, const char *);
rc = regexec (preg, str, 0, NULL, 0);
va_end (va);
return (rc == 0) ? 1 : 0;
}
/* Always pass a value as valid. */
static int check_true (int unused ATTR_UNUSED, ...)
{
return 1;
}
/* Initializes a position on the options table. This is intended to be used at
* initialization to make a table of valid options and its default values. */
static int init_option (const char *name, enum option_type type)
{
unsigned int h=hash(name);
int pos=find_free(h);
assert (strlen(name) < OPTION_NAME_MAX);
assert (is_valid_symbol (name));
assert(pos>=0);
strcpy (options[pos].name, name);
options[pos].hash=h;
options[pos].type = type;
options[pos].ignore_in_config = 0;
options[pos].set_in_config = 0;
options[pos].check = check_true;
options[pos].count = 0;
options[pos].constraints = NULL;
options_num++;
return pos;
}
/* Add an integer option to the options table. This is intended to be used at
* initialization to make a table of valid options and their default values. */
static void add_int (const char *name, const int value, options_t_check *check, const int count, ...)
{
int ix, pos;
va_list va;
pos = init_option (name, OPTION_INT);
options[pos].value.num = value;
options[pos].check = check;
options[pos].count = count;
if (count > 0) {
options[pos].constraints = xcalloc (count, sizeof (int));
va_start (va, count);
for (ix = 0; ix < count; ix += 1)
((int *) options[pos].constraints)[ix] = va_arg (va, int);
va_end (va);
}
}
/* Add a boolean option to the options table. This is intended to be used at
* initialization to make a table of valid options and their default values. */
static void add_bool (const char *name, const bool value)
{
int pos;
pos = init_option (name, OPTION_BOOL);
options[pos].value.boolean = value;
}
/* Add a string option to the options table. This is intended to be used at
* initialization to make a table of valid options and their default values. */
static void add_str (const char *name, const char *value, options_t_check *check, const int count, ...)
{
int ix, pos;
va_list va;
pos = init_option (name, OPTION_STR);
options[pos].value.str = xstrdup (value);
options[pos].check = check;
options[pos].count = count;
if (count > 0) {
va_start (va, count);
if (check == check_length) {
options[pos].constraints = xcalloc (count, sizeof (int));
for (ix = 0; ix < count; ix += 1)
((int *) options[pos].constraints)[ix] = va_arg (va, int);
} else {
options[pos].constraints = xcalloc (count, sizeof (char *));
for (ix = 0; ix < count; ix += 1)
((char **) options[pos].constraints)[ix] = xstrdup (va_arg (va, char *));
}
va_end (va);
}
}
/* Add a symbol option to the options table. This is intended to be used at
* initialization to make a table of valid options and their default values. */
static void add_symb (const char *name, const char *value, const int count, ...)
{
int ix, pos;
va_list va;
assert (name != NULL);
assert (value != NULL);
assert (count > 0);
pos = init_option (name, OPTION_SYMB);
options[pos].value.str = NULL;
options[pos].check = check_discrete;
options[pos].count = count;
va_start (va, count);
options[pos].constraints = xcalloc (count, sizeof (char *));
for (ix = 0; ix < count; ix += 1) {
char *val = va_arg (va, char *);
if (!is_valid_symbol (val))
fatal ("Invalid symbol in '%s' constraint list!", name);
((char **) options[pos].constraints)[ix] = xstrdup (val);
if (!strcasecmp (val, value))
options[pos].value.str = ((char **) options[pos].constraints)[ix];
}
if (!options[pos].value.str)
fatal ("Invalid default value symbol in '%s'!", name);
va_end (va);
}
/* Add a list option to the options table. This is intended to be used at
* initialization to make a table of valid options and their default values. */
static void add_list (const char *name, const char *value, options_t_check *check, const int count, ...)
{
int ix, pos;
va_list va;
pos = init_option (name, OPTION_LIST);
options[pos].value.list = lists_strs_new (8);
if (value)
lists_strs_split (options[pos].value.list, value, ":");
options[pos].check = check;
options[pos].count = count;
if (count > 0) {
va_start (va, count);
if (check == check_length) {
options[pos].constraints = xcalloc (count, sizeof (int));
for (ix = 0; ix < count; ix += 1)
((int *) options[pos].constraints)[ix] = va_arg (va, int);
} else {
options[pos].constraints = xcalloc (count, sizeof (char *));
for (ix = 0; ix < count; ix += 1)
((char **) options[pos].constraints)[ix] = xstrdup (va_arg (va, char *));
}
va_end (va);
}
}
/* Set an integer option to the value. */
void options_set_int (const char *name, const int value)
{
int i = find_option (name, OPTION_INT);
if (i == -1)
fatal ("Tried to set wrong option '%s'!", name);
options[i].value.num = value;
}
/* Set a boolean option to the value. */
void options_set_bool (const char *name, const bool value)
{
int i = find_option (name, OPTION_BOOL);
if (i == -1)
fatal ("Tried to set wrong option '%s'!", name);
options[i].value.boolean = value;
}
/* Set a symbol option to the value. */
void options_set_symb (const char *name, const char *value)
{
int opt, ix;
opt = find_option (name, OPTION_SYMB);
if (opt == -1)
fatal ("Tried to set wrong option '%s'!", name);
options[opt].value.str = NULL;
for (ix = 0; ix < options[opt].count; ix += 1) {
if (!strcasecmp(value, (((char **) options[opt].constraints)[ix])))
options[opt].value.str = ((char **) options[opt].constraints)[ix];
}
if (!options[opt].value.str)
fatal ("Tried to set '%s' to unknown symbol '%s'!", name, value);
}
/* Set a string option to the value. The string is duplicated. */
void options_set_str (const char *name, const char *value)
{
int opt = find_option (name, OPTION_STR);
if (opt == -1)
fatal ("Tried to set wrong option '%s'!", name);
if (options[opt].value.str)
free (options[opt].value.str);
options[opt].value.str = xstrdup (value);
}
/* Set list option values to the colon separated value. */
void options_set_list (const char *name, const char *value, bool append)
{
int opt;
opt = find_option (name, OPTION_LIST);
if (opt == -1)
fatal ("Tried to set wrong option '%s'!", name);
if (!append && !lists_strs_empty (options[opt].value.list))
lists_strs_clear (options[opt].value.list);
lists_strs_split (options[opt].value.list, value, ":");
}
/* Given a type, a name and a value, set that option's value.
* Return false on error. */
bool options_set_pair (const char *name, const char *value, bool append)
{
int num;
char *end;
bool val;
switch (options_get_type (name)) {
case OPTION_INT:
num = strtol (value, &end, 10);
if (*end)
return false;
if (!options_check_int (name, num))
return false;
options_set_int (name, num);
break;
case OPTION_BOOL:
if (!strcasecmp (value, "yes"))
val = true;
else if (!strcasecmp (value, "no"))
val = false;
else
return false;
options_set_bool (name, val);
break;
case OPTION_STR:
if (!options_check_str (name, value))
return false;
options_set_str (name, value);
break;
case OPTION_SYMB:
if (!options_check_symb (name, value))
return false;
options_set_symb (name, value);
break;
case OPTION_LIST:
if (!options_check_list (name, value))
return false;
options_set_list (name, value, append);
break;
case OPTION_FREE:
case OPTION_ANY:
return false;
}
return true;
}
void options_ignore_config (const char *name)
{
int opt = find_option (name, OPTION_ANY);
if (opt == -1)
fatal ("Tried to set wrong option '%s'!", name);
options[opt].ignore_in_config = 1;
}
#define CHECK_DISCRETE(c) check_discrete, (c)
#define CHECK_RANGE(c) check_range, (2 * (c))
#define CHECK_LENGTH(c) check_length, (2 * (c))
#define CHECK_SYMBOL(c) (c)
#define CHECK_FUNCTION check_function, 0
#define CHECK_NONE check_true, 0
/* Make a table of options and its default values. */
void options_init ()
{
memset (options, 0, sizeof(options));
add_bool ("ReadTags", true);
add_str ("MusicDir", NULL, CHECK_NONE);
add_bool ("StartInMusicDir", false);
add_int ("CircularLogSize", 0, CHECK_RANGE(1), 0, INT_MAX);
add_symb ("Sort", "FileName", CHECK_SYMBOL(1), "FileName");
add_bool ("ShowStreamErrors", false);
add_bool ("MP3IgnoreCRCErrors", true);
add_bool ("Repeat", false);
add_bool ("Shuffle", false);
add_bool ("AutoNext", true);
add_str ("FormatString",
"%(n:%n :)%(a:%a - :)%(t:%t:)%(A: \\(%A\\):)", CHECK_NONE);
add_int ("InputBuffer", 512, CHECK_RANGE(1), 32, INT_MAX);
add_int ("OutputBuffer", 512, CHECK_RANGE(1), 128, INT_MAX);
add_int ("Prebuffering", 64, CHECK_RANGE(1), 0, INT_MAX);
add_str ("HTTPProxy", NULL, CHECK_NONE);
#ifdef OPENBSD
add_list ("SoundDriver", "SNDIO:JACK:OSS",
CHECK_DISCRETE(5), "SNDIO", "Jack", "ALSA", "OSS", "null");
#else
add_list ("SoundDriver", "Jack:ALSA:OSS",
CHECK_DISCRETE(5), "SNDIO", "Jack", "ALSA", "OSS", "null");
#endif
add_str ("JackClientName", "moc", CHECK_NONE);
add_bool ("JackStartServer", false);
add_str ("JackOutLeft", "system:playback_1", CHECK_NONE);
add_str ("JackOutRight", "system:playback_2", CHECK_NONE);
add_str ("OSSDevice", "/dev/dsp", CHECK_NONE);
add_str ("OSSMixerDevice", "/dev/mixer", CHECK_NONE);
add_symb ("OSSMixerChannel1", "pcm",
CHECK_SYMBOL(3), "pcm", "master", "speaker");
add_symb ("OSSMixerChannel2", "master",
CHECK_SYMBOL(3), "pcm", "master", "speaker");
add_str ("ALSADevice", "default", CHECK_NONE);
add_str ("ALSAMixer1", "PCM", CHECK_NONE);
add_str ("ALSAMixer2", "Master", CHECK_NONE);
add_bool ("ALSAStutterDefeat", false);
add_bool ("Softmixer_SaveState", true);
add_bool ("Equalizer_SaveState", true);
add_bool ("ShowHiddenFiles", false);
add_bool ("HideFileExtension", false);
add_bool ("ShowFormat", true);
add_symb ("ShowTime", "IfAvailable",
CHECK_SYMBOL(3), "yes", "no", "IfAvailable");
add_bool ("ShowTimePercent", false);
add_list ("ScreenTerms", "screen:screen-w:vt100", CHECK_NONE);
add_list ("XTerms", "xterm:"
"xterm-colour:xterm-color:"
"xterm-256colour:xterm-256color:"
"rxvt:rxvt-unicode:"
"rxvt-unicode-256colour:rxvt-unicode-256color:"
"eterm", CHECK_NONE);
add_str ("Theme", NULL, CHECK_NONE);
add_str ("XTermTheme", NULL, CHECK_NONE);
add_str ("ForceTheme", NULL, CHECK_NONE); /* Used when -T is set */
add_bool ("AutoLoadLyrics", true);
add_str ("MOCDir", "~/.moc", CHECK_NONE);
add_bool ("UseMMap", false);
add_bool ("UseMimeMagic", false);
add_str ("ID3v1TagsEncoding", "WINDOWS-1250", CHECK_NONE);
add_bool ("UseRCC", true);
add_bool ("UseRCCForFilesystem", true);
add_bool ("EnforceTagsEncoding", false);
add_bool ("FileNamesIconv", false);
add_bool ("NonUTFXterm", false);
add_bool ("Precache", true);
add_bool ("SavePlaylist", true);
add_bool ("SyncPlaylist", true);
add_str ("Keymap", NULL, CHECK_NONE);
add_bool ("ASCIILines", false);
add_str ("FastDir1", NULL, CHECK_NONE);
add_str ("FastDir2", NULL, CHECK_NONE);
add_str ("FastDir3", NULL, CHECK_NONE);
add_str ("FastDir4", NULL, CHECK_NONE);
add_str ("FastDir5", NULL, CHECK_NONE);
add_str ("FastDir6", NULL, CHECK_NONE);
add_str ("FastDir7", NULL, CHECK_NONE);
add_str ("FastDir8", NULL, CHECK_NONE);
add_str ("FastDir9", NULL, CHECK_NONE);
add_str ("FastDir10", NULL, CHECK_NONE);
add_int ("SeekTime", 1, CHECK_RANGE(1), 1, INT_MAX);
add_int ("SilentSeekTime", 5, CHECK_RANGE(1), 1, INT_MAX);
add_list ("PreferredDecoders",
"aac(aac,ffmpeg):m4a(ffmpeg):"
"mpc(musepack,*,ffmpeg):mpc8(musepack,*,ffmpeg):"
"sid(sidplay2):mus(sidplay2):"
"wav(sndfile,*,ffmpeg):"
"wv(wavpack,*,ffmpeg):"
"audio/aac(aac):audio/aacp(aac):audio/m4a(ffmpeg):"
"audio/wav(sndfile,*):"
"ogg(vorbis,*,ffmpeg):oga(vorbis,*,ffmpeg):ogv(ffmpeg):"
"application/ogg(vorbis):audio/ogg(vorbis):"
"flac(flac,*,ffmpeg):"
"opus(ffmpeg):"
"spx(speex)",
CHECK_FUNCTION);
add_symb ("ResampleMethod", "Linear",
CHECK_SYMBOL(5), "SincBestQuality", "SincMediumQuality",
"SincFastest", "ZeroOrderHold", "Linear");
add_int ("ForceSampleRate", 0, CHECK_RANGE(1), 0, 500000);
add_bool ("Allow24bitOutput", false);
add_bool ("UseRealtimePriority", false);
add_int ("TagsCacheSize", 256, CHECK_RANGE(1), 0, INT_MAX);
add_bool ("PlaylistNumbering", true);
add_list ("Layout1", "directory(0,0,50%,100%):playlist(50%,0,FILL,100%)",
CHECK_FUNCTION);
add_list ("Layout2", "directory(0,0,100%,100%):playlist(0,0,100%,100%)",
CHECK_FUNCTION);
add_list ("Layout3", NULL, CHECK_FUNCTION);
add_bool ("FollowPlayedFile", true);
add_bool ("CanStartInPlaylist", true);
add_str ("ExecCommand1", NULL, CHECK_NONE);
add_str ("ExecCommand2", NULL, CHECK_NONE);
add_str ("ExecCommand3", NULL, CHECK_NONE);
add_str ("ExecCommand4", NULL, CHECK_NONE);
add_str ("ExecCommand5", NULL, CHECK_NONE);
add_str ("ExecCommand6", NULL, CHECK_NONE);
add_str ("ExecCommand7", NULL, CHECK_NONE);
add_str ("ExecCommand8", NULL, CHECK_NONE);
add_str ("ExecCommand9", NULL, CHECK_NONE);
add_str ("ExecCommand10", NULL, CHECK_NONE);
add_bool ("UseCursorSelection", false);
add_bool ("SetXtermTitle", true);
add_bool ("SetScreenTitle", true);
add_bool ("PlaylistFullPaths", true);
add_str ("BlockDecorators", "`\"'", CHECK_LENGTH(1), 3, 3);
add_int ("MessageLingerTime", 3, CHECK_RANGE(1), 0, INT_MAX);
add_bool ("PrefixQueuedMessages", true);
add_str ("ErrorMessagesQueued", "!", CHECK_NONE);
add_bool ("ModPlug_Oversampling", true);
add_bool ("ModPlug_NoiseReduction", true);
add_bool ("ModPlug_Reverb", false);
add_bool ("ModPlug_MegaBass", false);
add_bool ("ModPlug_Surround", false);
add_symb ("ModPlug_ResamplingMode", "FIR",
CHECK_SYMBOL(4), "FIR", "SPLINE", "LINEAR", "NEAREST");
add_int ("ModPlug_Channels", 2, CHECK_DISCRETE(2), 1, 2);
add_int ("ModPlug_Bits", 16, CHECK_DISCRETE(3), 8, 16, 32);
add_int ("ModPlug_Frequency", 44100,
CHECK_DISCRETE(4), 11025, 22050, 44100, 48000);
add_int ("ModPlug_ReverbDepth", 0, CHECK_RANGE(1), 0, 100);
add_int ("ModPlug_ReverbDelay", 0, CHECK_RANGE(1), 0, INT_MAX);
add_int ("ModPlug_BassAmount", 0, CHECK_RANGE(1), 0, 100);
add_int ("ModPlug_BassRange", 10, CHECK_RANGE(1), 10, 100);
add_int ("ModPlug_SurroundDepth", 0, CHECK_RANGE(1), 0, 100);
add_int ("ModPlug_SurroundDelay", 0, CHECK_RANGE(1), 0, INT_MAX);
add_int ("ModPlug_LoopCount", 0, CHECK_RANGE(1), -1, INT_MAX);
add_int ("TiMidity_Rate", 44100, CHECK_RANGE(1), 8000, 48000);
// not sure about the limits... I like 44100
add_int ("TiMidity_Bits", 16, CHECK_DISCRETE(2), 8, 16);
add_int ("TiMidity_Channels", 2, CHECK_DISCRETE(2), 1, 2);
add_int ("TiMidity_Volume", 100, CHECK_RANGE(1), 0, 800);
add_str ("TiMidity_Config", NULL, CHECK_NONE);
add_int ("SidPlay2_DefaultSongLength", 180,
CHECK_RANGE(1), 0, INT_MAX);
add_int ("SidPlay2_MinimumSongLength", 0,
CHECK_RANGE(1), 0, INT_MAX);
add_str ("SidPlay2_Database", NULL, CHECK_NONE);
add_int ("SidPlay2_Frequency", 44100, CHECK_RANGE(1), 4000, 48000);
add_int ("SidPlay2_Bits", 16, CHECK_DISCRETE(2), 8, 16);
add_int ("SidPlay2_Optimisation", 0, CHECK_RANGE(1), 0, 2);
add_symb ("SidPlay2_PlayMode", "M",
CHECK_SYMBOL(4), "M", "S", "L", "R");
add_bool ("SidPlay2_StartAtStart", true);
add_bool ("SidPlay2_PlaySubTunes", true);
add_str ("OnSongChange", NULL, CHECK_NONE);
add_bool ("RepeatSongChange", false);
add_str ("OnServerStart", NULL, CHECK_NONE);
add_str ("OnServerStop", NULL, CHECK_NONE);
add_str ("OnStop", NULL, CHECK_NONE);
add_bool ("QueueNextSongReturn", false);
}
/* Return 1 if a parameter to an integer option is valid. */
int options_check_int (const char *name, const int val)
{
int opt;
opt = find_option (name, OPTION_INT);
if (opt == -1)
return 0;
return options[opt].check (opt, val);
}
/* Return 1 if a parameter to a boolean option is valid. This may seem
* pointless but it provides a consistant interface, ensures the existence
* of the option and checks the value where true booleans are emulated with
* other types. */
int options_check_bool (const char *name, const bool val)
{
int opt, result = 0;
opt = find_option (name, OPTION_BOOL);
if (opt == -1)
return 0;
if (val == true || val == false)
result = 1;
return result;
}
/* Return 1 if a parameter to a string option is valid. */
int options_check_str (const char *name, const char *val)
{
int opt;
opt = find_option (name, OPTION_STR);
if (opt == -1)
return 0;
return options[opt].check (opt, val);
}
/* Return 1 if a parameter to a symbol option is valid. */
int options_check_symb (const char *name, const char *val)
{
int opt;
opt = find_option (name, OPTION_SYMB);
if (opt == -1)
return 0;
return check_discrete (opt, val);
}
/* Return 1 if a parameter to a list option is valid. */
int options_check_list (const char *name, const char *val)
{
int opt, size, ix, result;
lists_t_strs *list;
assert (name);
assert (val);
opt = find_option (name, OPTION_LIST);
if (opt == -1)
return 0;
list = lists_strs_new (8);
size = lists_strs_split (list, val, ":");
result = 1;
for (ix = 0; ix < size; ix += 1) {
if (!options[opt].check (opt, lists_strs_at (list, ix))) {
result = 0;
break;
}
}
lists_strs_free (list);
return result;
}
/* Return 1 if the named option was defaulted. */
int options_was_defaulted (const char *name)
{
int opt, result = 0;
assert (name);
opt = find_option (name, OPTION_ANY);
if (opt == -1)
return 0;
if (!options[opt].set_in_config && !options[opt].ignore_in_config)
result = 1;
return result;
}
/* Find and substitute variables enclosed by '${...}'. Variables are
* substituted first from the environment then, if not found, from
* the configuration options. Strings of the form '$${' are reduced to
* '${' and not substituted. The result is returned as a new string. */
static char *substitute_variable (const char *name_in, const char *value_in)
{
size_t len;
char *dollar, *result, *ptr, *name, *value, *dflt, *end;
static const char accept[] = "abcdefghijklmnopqrstuvwxyz"
"ABCDEFGHIJKLMNOPQRSTUVWXYZ"
"0123456789_";
lists_t_strs *strs;
result = xstrdup (value_in);
ptr = result;
strs = lists_strs_new (5);
dollar = strstr (result, "${");
while (dollar) {
/* Escape "$${". */
if (dollar > ptr && dollar[-1] == '$') {
dollar[-1] = 0x00;
lists_strs_append (strs, ptr);
ptr = dollar;
dollar = strstr (&dollar[2], "${");
continue;
}
/* Copy up to this point verbatim. */
dollar[0] = 0x00;
lists_strs_append (strs, ptr);
/* Find where the substitution variable name ends. */
name = &dollar[2];
len = strspn (name, accept);
if (len == 0)
fatal ("Error in config file option '%s':\n"
" substitution variable name is missing!",
name_in);
/* Find default substitution or closing brace. */
dflt = NULL;
if (name[len] == '}') {
end = &name[len];
end[0] = 0x00;
}
else if (strncmp (&name[len], ":-", 2) == 0) {
name[len] = 0x00;
dflt = &name[len + 2];
end = strchr (dflt, '}');
if (end == NULL)
fatal ("Error in config file option '%s': "
"unterminated '${%s:-'!",
name_in, name);
end[0] = 0x00;
}
else if (name[len] == 0x00) {
fatal ("Error in config file option '%s': "
"unterminated '${'!",
name_in);
}
else {
fatal ("Error in config file option '%s':\n"
" expecting ':-' or '}' found '%c'!",
name_in, name[len]);
}
/* Fetch environment variable or configuration option value. */
value = xstrdup (getenv (name));
if (value == NULL && find_option (name, OPTION_ANY) != -1) {
char buf[16];
lists_t_strs *list;
switch (options_get_type (name)) {
case OPTION_INT:
snprintf (buf, sizeof (buf), "%d", options_get_int (name));
value = xstrdup (buf);
break;
case OPTION_BOOL:
value = xstrdup (options_get_bool (name) ? "yes" : "no");
break;
case OPTION_STR:
value = xstrdup (options_get_str (name));
break;
case OPTION_SYMB:
value = xstrdup (options_get_symb (name));
break;
case OPTION_LIST:
list = options_get_list (name);
if (!lists_strs_empty (list)) {
value = lists_strs_fmt (list, "%s:");
value[strlen (value) - 1] = 0x00;
}
break;
case OPTION_FREE:
case OPTION_ANY:
break;
}
}
if (value && value[0])
lists_strs_append (strs, value);
else if (dflt)
lists_strs_append (strs, dflt);
else
fatal ("Error in config file option '%s':\n"
" substitution variable '%s' not set or null!",
name_in, &dollar[2]);
free (value);
/* Go look for another substitution. */
ptr = &end[1];
dollar = strstr (ptr, "${");
}
/* If anything changed copy segments to result. */
if (!lists_strs_empty (strs)) {
lists_strs_append (strs, ptr);
free (result);
result = lists_strs_cat (strs);
}
lists_strs_free (strs);
return result;
}
/* Set an option read from the configuration file. Return false on error. */
static bool set_option (const char *name, const char *value_in, bool append)
{
int i;
char *value;
i = find_option (name, OPTION_ANY);
if (i == -1) {
fprintf (stderr, "Wrong option name: '%s'.", name);
return false;
}
if (options[i].ignore_in_config)
return true;
if (append && options[i].type != OPTION_LIST) {
fprintf (stderr,
"Only list valued options can be appended to ('%s').",
name);
return false;
}
if (!append && options[i].set_in_config) {
fprintf (stderr, "Tried to set an option that has been already "
"set in the config file ('%s').", name);
return false;
}