target/linux/ifxmips/image/u-boot/files/lib_bootstrap/vsprintf.c

   1 /*
   2  *  linux/lib/vsprintf.c
   3  *
   4  *  Copyright (C) 1991, 1992  Linus Torvalds
   5  */
   6
   7 /* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
   8 /*
   9  * Wirzenius wrote this portably, Torvalds fucked it up :-)
  10  */
  11
  12 #include <stdarg.h>
  13 #include <linux/types.h>
  14 #include <linux/string.h>
  15 #include <linux/ctype.h>
  16
  17 #include <common.h>
  18 #if !defined (CONFIG_PANIC_HANG)
  19 #include <command.h>
  20 /*cmd_boot.c*/
  21 extern int do_reset (cmd_tbl_t *cmdtp, int flag, int argc, char *argv[]);
  22 #endif
  23
  24 unsigned long simple_strtoul(const char *cp,char **endp,unsigned int base)
  25 {
  26         unsigned long result = 0,value;
  27
  28         if (*cp == '0') {
  29                 cp++;
  30                 if ((*cp == 'x') && isxdigit(cp[1])) {
  31                         base = 16;
  32                         cp++;
  33                 }
  34                 if (!base) {
  35                         base = 8;
  36                 }
  37         }
  38         if (!base) {
  39                 base = 10;
  40         }
  41         while (isxdigit(*cp) && (value = isdigit(*cp) ? *cp-'0' : (islower(*cp)
  42             ? toupper(*cp) : *cp)-'A'+10) < base) {
  43                 result = result*base + value;
  44                 cp++;
  45         }
  46         if (endp)
  47                 *endp = (char *)cp;
  48         return result;
  49 }
  50
  51 long simple_strtol(const char *cp,char **endp,unsigned int base)
  52 {
  53         if(*cp=='-')
  54                 return -simple_strtoul(cp+1,endp,base);
  55         return simple_strtoul(cp,endp,base);
  56 }
  57
  58 #ifdef CFG_64BIT_STRTOUL
  59 unsigned long long simple_strtoull (const char *cp, char **endp, unsigned int base)
  60 {
  61         unsigned long long result = 0, value;
  62
  63         if (*cp == '0') {
  64                 cp++;
  65                 if ((*cp == 'x') && isxdigit (cp[1])) {
  66                         base = 16;
  67                         cp++;
  68                 }
  69                 if (!base) {
  70                         base = 8;
  71                 }
  72         }
  73         if (!base) {
  74                 base = 10;
  75         }
  76         while (isxdigit (*cp) && (value = isdigit (*cp)
  77                                 ? *cp - '0'
  78                                 : (islower (*cp) ? toupper (*cp) : *cp) - 'A' + 10) < base) {
  79                 result = result * base + value;
  80                 cp++;
  81         }
  82         if (endp)
  83                 *endp = (char *) cp;
  84         return result;
  85 }
  86 #endif /* CFG_64BIT_STRTOUL */
  87
  88 /* we use this so that we can do without the ctype library */
  89 #define is_digit(c)     ((c) >= '0' && (c) <= '9')
  90
  91 static int skip_atoi(const char **s)
  92 {
  93         int i=0;
  94
  95         while (is_digit(**s))
  96                 i = i*10 + *((*s)++) - '0';
  97         return i;
  98 }
  99
 100 #define ZEROPAD 1               /* pad with zero */
 101 #define SIGN    2               /* unsigned/signed long */
 102 #define PLUS    4               /* show plus */
 103 #define SPACE   8               /* space if plus */
 104 #define LEFT    16              /* left justified */
 105 #define SPECIAL 32              /* 0x */
 106 #define LARGE   64              /* use 'ABCDEF' instead of 'abcdef' */
 107
 108 #define do_div(n,base) ({ \
 109         int __res; \
 110         __res = ((unsigned long) n) % (unsigned) base; \
 111         n = ((unsigned long) n) / (unsigned) base; \
 112         __res; \
 113 })
 114
 115 #ifdef CFG_64BIT_VSPRINTF
 116 static char * number(char * str, long long num, int base, int size, int precision ,int type)
 117 #else
 118 static char * number(char * str, long num, int base, int size, int precision ,int type)
 119 #endif
 120 {
 121         char c,sign,tmp[66];
 122         const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
 123         int i;
 124
 125         if (type & LARGE)
 126                 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
 127         if (type & LEFT)
 128                 type &= ~ZEROPAD;
 129         if (base < 2 || base > 36)
 130                 return 0;
 131         c = (type & ZEROPAD) ? '0' : ' ';
 132         sign = 0;
 133         if (type & SIGN) {
 134                 if (num < 0) {
 135                         sign = '-';
 136                         num = -num;
 137                         size--;
 138                 } else if (type & PLUS) {
 139                         sign = '+';
 140                         size--;
 141                 } else if (type & SPACE) {
 142                         sign = ' ';
 143                         size--;
 144                 }
 145         }
 146         if (type & SPECIAL) {
 147                 if (base == 16)
 148                         size -= 2;
 149                 else if (base == 8)
 150                         size--;
 151         }
 152         i = 0;
 153         if (num == 0)
 154                 tmp[i++]='0';
 155         else while (num != 0)
 156                 tmp[i++] = digits[do_div(num,base)];
 157         if (i > precision)
 158                 precision = i;
 159         size -= precision;
 160         if (!(type&(ZEROPAD+LEFT)))
 161                 while(size-->0)
 162                         *str++ = ' ';
 163         if (sign)
 164                 *str++ = sign;
 165         if (type & SPECIAL) {
 166                 if (base==8)
 167                         *str++ = '0';
 168                 else if (base==16) {
 169                         *str++ = '0';
 170                         *str++ = digits[33];
 171                 }
 172         }
 173         if (!(type & LEFT))
 174                 while (size-- > 0)
 175                         *str++ = c;
 176         while (i < precision--)
 177                 *str++ = '0';
 178         while (i-- > 0)
 179                 *str++ = tmp[i];
 180         while (size-- > 0)
 181                 *str++ = ' ';
 182         return str;
 183 }
 184
 185 /* Forward decl. needed for IP address printing stuff... */
 186 int sprintf(char * buf, const char *fmt, ...);
 187
 188 int vsprintf(char *buf, const char *fmt, va_list args)
 189 {
 190         int len;
 191 #ifdef CFG_64BIT_VSPRINTF
 192         unsigned long long num;
 193 #else
 194         unsigned long num;
 195 #endif
 196         int i, base;
 197         char * str;
 198         const char *s;
 199
 200         int flags;              /* flags to number() */
 201
 202         int field_width;        /* width of output field */
 203         int precision;          /* min. # of digits for integers; max
 204                                    number of chars for from string */
 205         int qualifier;          /* 'h', 'l', or 'q' for integer fields */
 206
 207         for (str=buf ; *fmt ; ++fmt) {
 208                 if (*fmt != '%') {
 209                         *str++ = *fmt;
 210                         continue;
 211                 }
 212
 213                 /* process flags */
 214                 flags = 0;
 215                 repeat:
 216                         ++fmt;          /* this also skips first '%' */
 217                         switch (*fmt) {
 218                                 case '-': flags |= LEFT; goto repeat;
 219                                 case '+': flags |= PLUS; goto repeat;
 220                                 case ' ': flags |= SPACE; goto repeat;
 221                                 case '#': flags |= SPECIAL; goto repeat;
 222                                 case '0': flags |= ZEROPAD; goto repeat;
 223                                 }
 224
 225                 /* get field width */
 226                 field_width = -1;
 227                 if (is_digit(*fmt))
 228                         field_width = skip_atoi(&fmt);
 229                 else if (*fmt == '*') {
 230                         ++fmt;
 231                         /* it's the next argument */
 232                         field_width = va_arg(args, int);
 233                         if (field_width < 0) {
 234                                 field_width = -field_width;
 235                                 flags |= LEFT;
 236                         }
 237                 }
 238
 239                 /* get the precision */
 240                 precision = -1;
 241                 if (*fmt == '.') {
 242                         ++fmt;
 243                         if (is_digit(*fmt))
 244                                 precision = skip_atoi(&fmt);
 245                         else if (*fmt == '*') {
 246                                 ++fmt;
 247                                 /* it's the next argument */
 248                                 precision = va_arg(args, int);
 249                         }
 250                         if (precision < 0)
 251                                 precision = 0;
 252                 }
 253
 254                 /* get the conversion qualifier */
 255                 qualifier = -1;
 256                 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'q') {
 257                         qualifier = *fmt;
 258                         ++fmt;
 259                 }
 260
 261                 /* default base */
 262                 base = 10;
 263
 264                 switch (*fmt) {
 265                 case 'c':
 266                         if (!(flags & LEFT))
 267                                 while (--field_width > 0)
 268                                         *str++ = ' ';
 269                         *str++ = (unsigned char) va_arg(args, int);
 270                         while (--field_width > 0)
 271                                 *str++ = ' ';
 272                         continue;
 273
 274                 case 's':
 275                         s = va_arg(args, char *);
 276                         if (!s)
 277                                 s = "<NULL>";
 278
 279                         len = strnlen(s, precision);
 280
 281                         if (!(flags & LEFT))
 282                                 while (len < field_width--)
 283                                         *str++ = ' ';
 284                         for (i = 0; i < len; ++i)
 285                                 *str++ = *s++;
 286                         while (len < field_width--)
 287                                 *str++ = ' ';
 288                         continue;
 289
 290                 case 'p':
 291                         if (field_width == -1) {
 292                                 field_width = 2*sizeof(void *);
 293                                 flags |= ZEROPAD;
 294                         }
 295                         str = number(str,
 296                                 (unsigned long) va_arg(args, void *), 16,
 297                                 field_width, precision, flags);
 298                         continue;
 299
 300
 301                 case 'n':
 302                         if (qualifier == 'l') {
 303                                 long * ip = va_arg(args, long *);
 304                                 *ip = (str - buf);
 305                         } else {
 306                                 int * ip = va_arg(args, int *);
 307                                 *ip = (str - buf);
 308                         }
 309                         continue;
 310
 311                 case '%':
 312                         *str++ = '%';
 313                         continue;
 314
 315                 /* integer number formats - set up the flags and "break" */
 316                 case 'o':
 317                         base = 8;
 318                         break;
 319
 320                 case 'X':
 321                         flags |= LARGE;
 322                 case 'x':
 323                         base = 16;
 324                         break;
 325
 326                 case 'd':
 327                 case 'i':
 328                         flags |= SIGN;
 329                 case 'u':
 330                         break;
 331
 332                 default:
 333                         *str++ = '%';
 334                         if (*fmt)
 335                                 *str++ = *fmt;
 336                         else
 337                                 --fmt;
 338                         continue;
 339                 }
 340 #ifdef CFG_64BIT_VSPRINTF
 341                 if (qualifier == 'q')  /* "quad" for 64 bit variables */
 342                         num = va_arg(args, unsigned long long);
 343                 else
 344 #endif
 345                 if (qualifier == 'l')
 346                         num = va_arg(args, unsigned long);
 347                 else if (qualifier == 'h') {
 348                         num = (unsigned short) va_arg(args, int);
 349                         if (flags & SIGN)
 350                                 num = (short) num;
 351                 } else if (flags & SIGN)
 352                         num = va_arg(args, int);
 353                 else
 354                         num = va_arg(args, unsigned int);
 355                 str = number(str, num, base, field_width, precision, flags);
 356         }
 357         *str = '\0';
 358         return str-buf;
 359 }
 360
 361 int sprintf(char * buf, const char *fmt, ...)
 362 {
 363         va_list args;
 364         int i;
 365
 366         va_start(args, fmt);
 367         i=vsprintf(buf,fmt,args);
 368         va_end(args);
 369         return i;
 370 }
 371
 372 void panic(const char *fmt, ...)
 373 {
 374         va_list args;
 375         va_start(args, fmt);
 376         vprintf(fmt, args);
 377         putc('\n');
 378         va_end(args);
 379 #if defined (CONFIG_PANIC_HANG)
 380         hang();
 381 #else
 382         udelay (100000);        /* allow messages to go out */
 383         do_reset (NULL, 0, 0, NULL);
 384 #endif
 385 }