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   1 /*
   2  * Copyright © 2009 Keith Packard <keithp@keithp.com>
   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; version 2 of the License.
   7  *
   8  * This program is distributed in the hope that it will be useful, but
   9  * WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along
  14  * with this program; if not, write to the Free Software Foundation, Inc.,
  15  * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  16  */
  17
  18 #include "ao.h"
  19
  20 __pdata uint16_t ao_cmd_lex_i;
  21 __pdata uint32_t ao_cmd_lex_u32;
  22 __pdata char    ao_cmd_lex_c;
  23 __pdata enum ao_cmd_status ao_cmd_status;
  24
  25 #define CMD_LEN 48
  26
  27 static __xdata char     cmd_line[CMD_LEN];
  28 static __pdata uint8_t  cmd_len;
  29 static __pdata uint8_t  cmd_i;
  30
  31 static void
  32 put_string(__code char *s)
  33 {
  34         char    c;
  35         while ((c = *s++))
  36                 putchar(c);
  37 }
  38
  39 static void
  40 readline(void)
  41 {
  42         __pdata char c;
  43         if (ao_echo())
  44                 put_string("> ");
  45         cmd_len = 0;
  46         for (;;) {
  47                 flush();
  48                 c = getchar();
  49                 /* backspace/delete */
  50                 if (c == '\010' || c == '\177') {
  51                         if (cmd_len != 0) {
  52                                 if (ao_echo())
  53                                         put_string("\010 \010");
  54                                 --cmd_len;
  55                         }
  56                         continue;
  57                 }
  58
  59                 /* ^U */
  60                 if (c == '\025') {
  61                         while (cmd_len != 0) {
  62                                 if (ao_echo())
  63                                         put_string("\010 \010");
  64                                 --cmd_len;
  65                         }
  66                         continue;
  67                 }
  68
  69                 /* map CR to NL */
  70                 if (c == '\r')
  71                         c = '\n';
  72
  73                 if (c == '\n') {
  74                         if (ao_echo())
  75                                 putchar('\n');
  76                         break;
  77                 }
  78
  79                 if (cmd_len >= CMD_LEN - 2) {
  80                         if (ao_echo())
  81                                 putchar('\007');
  82                         continue;
  83                 }
  84                 cmd_line[cmd_len++] = c;
  85                 if (ao_echo())
  86                         putchar(c);
  87         }
  88         cmd_line[cmd_len++] = '\n';
  89         cmd_line[cmd_len++] = '\0';
  90         cmd_i = 0;
  91 }
  92
  93 void
  94 ao_cmd_lex(void)
  95 {
  96         ao_cmd_lex_c = '\n';
  97         if (cmd_i < cmd_len)
  98                 ao_cmd_lex_c = cmd_line[cmd_i++];
  99 }
 100
 101 static void
 102 putnibble(uint8_t v)
 103 {
 104         if (v < 10)
 105                 putchar(v + '0');
 106         else
 107                 putchar(v + ('a' - 10));
 108 }
 109
 110 void
 111 ao_cmd_put16(uint16_t v)
 112 {
 113         ao_cmd_put8(v >> 8);
 114         ao_cmd_put8(v);
 115 }
 116
 117 void
 118 ao_cmd_put8(uint8_t v)
 119 {
 120         putnibble((v >> 4) & 0xf);
 121         putnibble(v & 0xf);
 122 }
 123
 124 void
 125 ao_cmd_white(void)
 126 {
 127         while (ao_cmd_lex_c == ' ' || ao_cmd_lex_c == '\t')
 128                 ao_cmd_lex();
 129 }
 130
 131 int8_t
 132 ao_cmd_hexchar(char c)
 133 {
 134         if ('0' <= c && c <= '9')
 135                 return (c - '0');
 136         if ('a' <= c && c <= 'f')
 137                 return (c - 'a' + 10);
 138         if ('A' <= c && c <= 'F')
 139                 return (c - 'A' + 10);
 140         return -1;
 141 }
 142
 143 void
 144 ao_cmd_hexbyte(void)
 145 {
 146         uint8_t i;
 147         int8_t  n;
 148
 149         ao_cmd_lex_i = 0;
 150         ao_cmd_white();
 151         for (i = 0; i < 2; i++) {
 152                 n = ao_cmd_hexchar(ao_cmd_lex_c);
 153                 if (n < 0) {
 154                         ao_cmd_status = ao_cmd_syntax_error;
 155                         break;
 156                 }
 157                 ao_cmd_lex_i = (ao_cmd_lex_i << 4) | n;
 158                 ao_cmd_lex();
 159         }
 160 }
 161
 162 void
 163 ao_cmd_hex(void)
 164 {
 165         __pdata uint8_t r = ao_cmd_lex_error;
 166         int8_t  n;
 167
 168         ao_cmd_lex_i = 0;
 169         ao_cmd_white();
 170         for(;;) {
 171                 n = ao_cmd_hexchar(ao_cmd_lex_c);
 172                 if (n < 0)
 173                         break;
 174                 ao_cmd_lex_i = (ao_cmd_lex_i << 4) | n;
 175                 r = ao_cmd_success;
 176                 ao_cmd_lex();
 177         }
 178         if (r != ao_cmd_success)
 179                 ao_cmd_status = r;
 180 }
 181
 182 void
 183 ao_cmd_decimal(void)
 184 {
 185         __pdata uint8_t r = ao_cmd_lex_error;
 186
 187         ao_cmd_lex_u32 = 0;
 188         ao_cmd_white();
 189         for(;;) {
 190                 if ('0' <= ao_cmd_lex_c && ao_cmd_lex_c <= '9')
 191                         ao_cmd_lex_u32 = (ao_cmd_lex_u32 * 10) + (ao_cmd_lex_c - '0');
 192                 else
 193                         break;
 194                 r = ao_cmd_success;
 195                 ao_cmd_lex();
 196         }
 197         if (r != ao_cmd_success)
 198                 ao_cmd_status = r;
 199         ao_cmd_lex_i = (uint16_t) ao_cmd_lex_u32;
 200 }
 201
 202 uint8_t
 203 ao_match_word(__code char *word)
 204 {
 205         while (*word) {
 206                 if (ao_cmd_lex_c != *word) {
 207                         ao_cmd_status = ao_cmd_syntax_error;
 208                         return 0;
 209                 }
 210                 word++;
 211                 ao_cmd_lex();
 212         }
 213         return 1;
 214 }
 215
 216 static void
 217 echo(void)
 218 {
 219         ao_cmd_hex();
 220         if (ao_cmd_status == ao_cmd_success)
 221                 ao_stdios[ao_cur_stdio].echo = ao_cmd_lex_i != 0;
 222 }
 223
 224 static void
 225 ao_reboot(void)
 226 {
 227         ao_cmd_white();
 228         if (!ao_match_word("eboot"))
 229                 return;
 230         ao_arch_reboot();
 231         ao_panic(AO_PANIC_REBOOT);
 232 }
 233
 234 static void
 235 version(void)
 236 {
 237         printf("manufacturer     %s\n", ao_manufacturer);
 238         printf("product          %s\n", ao_product);
 239         printf("serial-number    %u\n", ao_serial_number);
 240 #if HAS_LOG
 241         printf("log-format       %u\n", ao_log_format);
 242 #endif
 243         printf("software-version %s\n", ao_version);
 244 }
 245
 246 #define NUM_CMDS        11
 247
 248 static __code struct ao_cmds    *__xdata (ao_cmds[NUM_CMDS]);
 249 static __pdata uint8_t          ao_ncmds;
 250
 251 static void
 252 help(void)
 253 {
 254         register uint8_t cmds;
 255         register uint8_t cmd;
 256         register __code struct ao_cmds * cs;
 257
 258         for (cmds = 0; cmds < ao_ncmds; cmds++) {
 259                 cs = ao_cmds[cmds];
 260                 for (cmd = 0; cs[cmd].func; cmd++)
 261                         printf("%-45s %s\n",
 262                                 cs[cmd].help,
 263                                 cs[cmd].help+1+strlen(cs[cmd].help));
 264         }
 265 }
 266
 267 static void
 268 report(void)
 269 {
 270         switch(ao_cmd_status) {
 271         case ao_cmd_lex_error:
 272         case ao_cmd_syntax_error:
 273                 puts("Syntax error");
 274                 ao_cmd_status = 0;
 275         default:
 276                 break;
 277         }
 278 }
 279
 280 void
 281 ao_cmd_register(__code struct ao_cmds *cmds)
 282 {
 283         if (ao_ncmds >= NUM_CMDS)
 284                 ao_panic(AO_PANIC_CMD);
 285         ao_cmds[ao_ncmds++] = cmds;
 286 }
 287
 288 void
 289 ao_cmd(void)
 290 {
 291         char    c;
 292         uint8_t cmd, cmds;
 293         __code struct ao_cmds * __xdata cs;
 294         void (*__xdata func)(void);
 295
 296         for (;;) {
 297                 readline();
 298                 ao_cmd_lex();
 299                 ao_cmd_white();
 300                 c = ao_cmd_lex_c;
 301                 ao_cmd_lex();
 302                 if (c == '\r' || c == '\n')
 303                         continue;
 304                 func = (void (*)(void)) NULL;
 305                 for (cmds = 0; cmds < ao_ncmds; cmds++) {
 306                         cs = ao_cmds[cmds];
 307                         for (cmd = 0; cs[cmd].func; cmd++)
 308                                 if (cs[cmd].help[0] == c) {
 309                                         func = cs[cmd].func;
 310                                         break;
 311                                 }
 312                         if (func)
 313                                 break;
 314                 }
 315                 if (func)
 316                         (*func)();
 317                 else
 318                         ao_cmd_status = ao_cmd_syntax_error;
 319                 report();
 320         }
 321 }
 322
 323 __xdata struct ao_task ao_cmd_task;
 324
 325 __code struct ao_cmds   ao_base_cmds[] = {
 326         { help,         "?\0Help" },
 327         { ao_task_info, "T\0Show tasks" },
 328         { echo,         "E <0 off, 1 on>\0Set echo mode" },
 329         { ao_reboot,    "r eboot\0Reboot" },
 330         { version,      "v\0Version" },
 331         { 0,    NULL },
 332 };
 333
 334 void
 335 ao_cmd_init(void)
 336 {
 337         ao_cmd_register(&ao_base_cmds[0]);
 338         ao_add_task(&ao_cmd_task, ao_cmd, "cmd");
 339 }