para.h

   1 /*
   2  * Copyright (C) 1997-2007 Andre Noll <maan@systemlinux.org>
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     This program is distributed in the hope that it will be useful,
  10  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  *     GNU General Public License for more details.
  13  *
  14  *     You should have received a copy of the GNU General Public License
  15  *     along with this program; if not, write to the Free Software
  16  *     Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
  17  */
  18
  19 /** \file para.h global paraslash definitions */
  20
  21 #include "config.h"
  22
  23 #include <sys/stat.h>
  24 #include <fcntl.h>
  25 #include <sys/wait.h>
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <time.h> /* time(), localtime() */
  29 #include <unistd.h>
  30 #include <errno.h>
  31 #include <limits.h>
  32 #include <stdarg.h>
  33 #include <ctype.h>
  34 #include <netinet/in.h>
  35 #include <arpa/inet.h>
  36 #include <sys/socket.h>
  37 #include <sys/un.h> /* needed by create_pf_socket */
  38 #include <string.h>
  39 #include "gcc-compat.h"
  40
  41 /** used in various contexts */
  42 #define MAXLINE 255
  43
  44 /** compute the minimum of \a a and \a b */
  45 #define PARA_MIN(a,b) ((a) < (b) ? (a) : (b))
  46 /** compute the maximum of \a a and \a b */
  47 #define PARA_MAX(a,b) ((a) > (b) ? (a) : (b))
  48 /** compute the absolute value of \a a */
  49 #define PARA_ABS(a) ((a) > 0 ? (a) : -(a))
  50
  51 /* Loglevels */
  52 #define DEBUG 1
  53 #define INFO  2
  54 #define NOTICE 3
  55 #define WARNING 4
  56 #define ERROR 5
  57 #define CRIT 6
  58 #define EMERG 7
  59
  60 #define COMPILE_TIME_LOGLEVEL 0
  61
  62 #if DEBUG > COMPILE_TIME_LOGLEVEL
  63 #define PARA_DEBUG_LOG(f,...) para_log(DEBUG, "%s: " f, __FUNCTION__, __VA_ARGS__)
  64 #else
  65 #define PARA_DEBUG_LOG(...) do {;} while (0)
  66 #endif
  67
  68 #if INFO > COMPILE_TIME_LOGLEVEL
  69 #define PARA_INFO_LOG(f,...) para_log(INFO, "%s: " f, __FUNCTION__, __VA_ARGS__)
  70 #else
  71 #define PARA_INFO_LOG(...) do {;} while (0)
  72 #endif
  73
  74 #if NOTICE > COMPILE_TIME_LOGLEVEL
  75 #define PARA_NOTICE_LOG(f,...) para_log(NOTICE, "%s: " f, __FUNCTION__, __VA_ARGS__)
  76 #else
  77 #define PARA_NOTICE_LOG(...) do {;} while (0)
  78 #endif
  79
  80 #if WARNING > COMPILE_TIME_LOGLEVEL
  81 #define PARA_WARNING_LOG(f,...) para_log(WARNING, "%s: " f, __FUNCTION__, __VA_ARGS__)
  82 #else
  83 #define PARA_WARNING_LOG(...) do {;} while (0)
  84 #endif
  85
  86 #if ERROR > COMPILE_TIME_LOGLEVEL
  87 #define PARA_ERROR_LOG(f,...) para_log(ERROR, "%s: " f, __FUNCTION__, __VA_ARGS__)
  88 #else
  89 #define PARA_ERROR_LOG(...) do {;} while (0)
  90 #endif
  91
  92 #if CRIT > COMPILE_TIME_LOGLEVEL
  93 #define PARA_CRIT_LOG(f,...) para_log(CRIT, "%s: " f, __FUNCTION__, __VA_ARGS__)
  94 #else
  95 #define PARA_CRIT_LOG(...) do {;} while (0)
  96 #endif
  97
  98 #if EMERG > COMPILE_TIME_LOGLEVEL
  99 #define PARA_EMERG_LOG(f,...) para_log(EMERG, "%s: " f, __FUNCTION__, __VA_ARGS__)
 100 #else
 101 #define PARA_EMERG_LOG(...)
 102 #endif
 103
 104 /**
 105  * define a standard log function that always writes to stderr
 106  *
 107  * \param loglevel_barier If the loglevel of the current message
 108  * is less than that, the message is going to be ignored.
 109  *
 110  */
 111 #define INIT_STDERR_LOGGING(loglevel_barrier) \
 112         __printf_2_3 void para_log(int ll, const char* fmt,...) \
 113         { \
 114                 va_list argp; \
 115                 if (ll < loglevel_barrier) \
 116                         return; \
 117                 va_start(argp, fmt); \
 118                 vfprintf(stderr, fmt, argp); \
 119                 va_end(argp); \
 120         }
 121
 122
 123 #define VERSION_TEXT(prefix) "para_" prefix " " PACKAGE_VERSION "\n" \
 124         "Copyright (C) 2007 Andre Noll\n" \
 125         "This is free software with ABSOLUTELY NO WARRANTY." \
 126         " See COPYING for details.\n" \
 127         "Written by Andre Noll.\n" \
 128         "Report bugs to <maan@systemlinux.org>.\n"
 129
 130 #define HANDLE_VERSION_FLAG(_prefix, _args_info_struct) \
 131         if (_args_info_struct.version_given) { \
 132                 printf("%s", VERSION_TEXT(_prefix)); \
 133                 exit(EXIT_SUCCESS); \
 134         }
 135
 136 #define AWAITING_DATA_MSG "\nAwaiting Data."
 137 #define PROCEED_MSG "\nProceed.\n"
 138 #define PROCEED_MSG_LEN strlen(PROCEED_MSG)
 139 #define EOC_MSG "\nEnd of Command."
 140 #define CHALLENGE_RESPONSE_MSG "challenge_response:"
 141
 142 /* gui_common */
 143 int para_open_audiod_pipe(char *);
 144 int read_audiod_pipe(int, void (*)(char *));
 145
 146 /* exec */
 147 int para_exec_cmdline_pid(pid_t *pid, const char *cmdline, int *fds);
 148
 149 /* time */
 150 int tv_diff(const struct timeval *b, const struct timeval *a, struct timeval *diff);
 151 long unsigned tv2ms(const struct timeval*);
 152 void d2tv(double, struct timeval*);
 153 void tv_add(const struct timeval*, const struct timeval *, struct timeval *);
 154 void tv_scale(const unsigned long, const struct timeval *, struct timeval *);
 155 void tv_divide(const unsigned long divisor, const struct timeval *tv,
 156         struct timeval *result);
 157 int tv_convex_combination(const long a, const struct timeval *tv1,
 158                 const long b, const struct timeval *tv2,
 159                 struct timeval *result);
 160 void ms2tv(const long unsigned n, struct timeval *tv);
 161
 162 /* stat */
 163 enum {
 164         SI_STATUS_BAR,          SI_STATUS,              SI_NUM_PLAYED,
 165         SI_MTIME,               SI_LENGTH_MIN,          SI_LENGTH_SEC,
 166         SI_FILE_SIZE,           SI_STATUS_FLAGS,        SI_FORMAT,
 167         SI_SCORE,               SI_AUDIO_INFO1,         SI_AUDIO_INFO2,
 168         SI_AUDIO_INFO3,         SI_DBINFO1,             SI_DBINFO2,
 169         SI_DBINFO3,             SI_DECODER_FLAGS,       SI_AUDIOD_STATUS,
 170         SI_PLAY_TIME,           SI_UPTIME,              SI_OFFSET,
 171         SI_LENGTH,              SI_STREAM_START,        SI_CURRENT_TIME,
 172         SI_AUDIOD_UPTIME,       SI_SELECTOR,            NUM_STAT_ITEMS
 173 };
 174
 175 int stat_item_valid(const char *item);
 176 int stat_line_valid(const char *);
 177 void stat_client_write(char *msg, int itemnum);
 178 int stat_client_add(int fd, long unsigned mask);
 179 unsigned for_each_line(char *, int, void (*)(char *));
 180 #define FOR_EACH_STAT_ITEM(i) for (i = 0; i < NUM_STAT_ITEMS; i++)
 181
 182 struct stat_item_data {
 183         const char *prefix, *postfix;
 184         unsigned x, y, len;
 185         int fg, bg, align;
 186 };
 187
 188 /* gui_theme */
 189 struct gui_theme {
 190         const char *name;
 191         const char *author;
 192         int sb_fg, sb_bg;
 193         int cmd_fg, cmd_bg;
 194         int output_fg, output_bg;
 195         int msg_fg, msg_bg;
 196         int err_msg_fg, err_msg_bg;
 197         int welcome_fg, welcome_bg;
 198         int sep_fg, sep_bg;
 199         const char *sep_str;
 200         int default_fg, default_bg;
 201
 202         int top_lines_default, top_lines_min;
 203         int lines_min, cols_min;
 204         struct stat_item_data data[NUM_STAT_ITEMS];
 205 };
 206
 207 void init_theme(int i, struct gui_theme *);
 208 void next_theme(struct gui_theme *);
 209 void prev_theme(struct gui_theme *);
 210 #define LEFT 1
 211 #define RIGHT 2
 212 #define CENTER 3
 213
 214
 215 __printf_2_3 void para_log(int, const char*, ...);
 216
 217 /* taken from printf man page */
 218 #define PARA_VSPRINTF(fmt, p) \
 219 { \
 220         int n, size = 100; \
 221         p = para_malloc(size); \
 222         while (1) { \
 223                 va_list ap; \
 224                 /* Try to print in the allocated space. */ \
 225                 va_start(ap, fmt); \
 226                 n = vsnprintf(p, size, fmt, ap); \
 227                 va_end(ap); \
 228                 /* If that worked, return the string. */ \
 229                 if (n > -1 && n < size) \
 230                         break; \
 231                 /* Else try again with more space. */ \
 232                 if (n > -1) /* glibc 2.1 */ \
 233                         size = n + 1; /* precisely what is needed */ \
 234                 else /* glibc 2.0 */ \
 235                         size *= 2; /* twice the old size */ \
 236                 p = para_realloc(p, size); \
 237         } \
 238 }