libiberty/_doprnt.c

   1 /* Provide a version of _doprnt in terms of fprintf.
   2    Copyright (C) 1998, 1999, 2000, 2001, 2002   Free Software Foundation, Inc.
   3    Contributed by Kaveh Ghazi  (ghazi@caip.rutgers.edu)  3/29/98
   4
   5 This program is free software; you can redistribute it and/or modify it
   6 under the terms of the GNU General Public License as published by the
   7 Free Software Foundation; either version 2, or (at your option) any
   8 later version.
   9
  10 This program is distributed in the hope that it will be useful,
  11 but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 GNU General Public License for more details.
  14
  15 You should have received a copy of the GNU General Public License
  16 along with this program; if not, write to the Free Software
  17 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #include "config.h"
  20 #include "ansidecl.h"
  21 #include "safe-ctype.h"
  22
  23 #include <stdio.h>
  24 #ifdef ANSI_PROTOTYPES
  25 #include <stdarg.h>
  26 #else
  27 #include <varargs.h>
  28 #endif
  29 #ifdef HAVE_STRING_H
  30 #include <string.h>
  31 #endif
  32 #ifdef HAVE_STDLIB_H
  33 #include <stdlib.h>
  34 #endif
  35
  36 #undef _doprnt
  37
  38 #ifdef HAVE__DOPRNT
  39 #define TEST
  40 #endif
  41
  42 #ifdef TEST /* Make sure to use the internal one.  */
  43 #define _doprnt my_doprnt
  44 #endif
  45
  46 #define COPY_VA_INT \
  47   do { \
  48          const int value = abs (va_arg (ap, int)); \
  49          char buf[32]; \
  50          ptr++; /* Go past the asterisk.  */ \
  51          *sptr = '\0'; /* NULL terminate sptr.  */ \
  52          sprintf(buf, "%d", value); \
  53          strcat(sptr, buf); \
  54          while (*sptr) sptr++; \
  55      } while (0)
  56
  57 #define PRINT_CHAR(CHAR) \
  58   do { \
  59          putc(CHAR, stream); \
  60          ptr++; \
  61          total_printed++; \
  62          continue; \
  63      } while (0)
  64
  65 #define PRINT_TYPE(TYPE) \
  66   do { \
  67         int result; \
  68         TYPE value = va_arg (ap, TYPE); \
  69         *sptr++ = *ptr++; /* Copy the type specifier.  */ \
  70         *sptr = '\0'; /* NULL terminate sptr.  */ \
  71         result = fprintf(stream, specifier, value); \
  72         if (result == -1) \
  73           return -1; \
  74         else \
  75           { \
  76             total_printed += result; \
  77             continue; \
  78           } \
  79       } while (0)
  80
  81 int
  82 _doprnt (format, ap, stream)
  83   const char * format;
  84   va_list ap;
  85   FILE * stream;
  86 {
  87   const char * ptr = format;
  88   char specifier[128];
  89   int total_printed = 0;
  90
  91   while (*ptr != '\0')
  92     {
  93       if (*ptr != '%') /* While we have regular characters, print them.  */
  94         PRINT_CHAR(*ptr);
  95       else /* We got a format specifier! */
  96         {
  97           char * sptr = specifier;
  98           int wide_width = 0, short_width = 0;
  99
 100           *sptr++ = *ptr++; /* Copy the % and move forward.  */
 101
 102           while (strchr ("-+ #0", *ptr)) /* Move past flags.  */
 103             *sptr++ = *ptr++;
 104
 105           if (*ptr == '*')
 106             COPY_VA_INT;
 107           else
 108             while (ISDIGIT(*ptr)) /* Handle explicit numeric value.  */
 109               *sptr++ = *ptr++;
 110
 111           if (*ptr == '.')
 112             {
 113               *sptr++ = *ptr++; /* Copy and go past the period.  */
 114               if (*ptr == '*')
 115                 COPY_VA_INT;
 116               else
 117                 while (ISDIGIT(*ptr)) /* Handle explicit numeric value.  */
 118                   *sptr++ = *ptr++;
 119             }
 120           while (strchr ("hlL", *ptr))
 121             {
 122               switch (*ptr)
 123                 {
 124                 case 'h':
 125                   short_width = 1;
 126                   break;
 127                 case 'l':
 128                   wide_width++;
 129                   break;
 130                 case 'L':
 131                   wide_width = 2;
 132                   break;
 133                 default:
 134                   abort();
 135                 }
 136               *sptr++ = *ptr++;
 137             }
 138
 139           switch (*ptr)
 140             {
 141             case 'd':
 142             case 'i':
 143             case 'o':
 144             case 'u':
 145             case 'x':
 146             case 'X':
 147             case 'c':
 148               {
 149                 /* Short values are promoted to int, so just copy it
 150                    as an int and trust the C library printf to cast it
 151                    to the right width.  */
 152                 if (short_width)
 153                   PRINT_TYPE(int);
 154                 else
 155                   {
 156                     switch (wide_width)
 157                       {
 158                       case 0:
 159                         PRINT_TYPE(int);
 160                         break;
 161                       case 1:
 162                         PRINT_TYPE(long);
 163                         break;
 164                       case 2:
 165                       default:
 166 #if defined(__GNUC__) || defined(HAVE_LONG_LONG)
 167                         PRINT_TYPE(long long);
 168 #else
 169                         PRINT_TYPE(long); /* Fake it and hope for the best.  */
 170 #endif
 171                         break;
 172                       } /* End of switch (wide_width) */
 173                   } /* End of else statement */
 174               } /* End of integer case */
 175               break;
 176             case 'f':
 177             case 'e':
 178             case 'E':
 179             case 'g':
 180             case 'G':
 181               {
 182                 if (wide_width == 0)
 183                   PRINT_TYPE(double);
 184                 else
 185                   {
 186 #if defined(__GNUC__) || defined(HAVE_LONG_DOUBLE)
 187                     PRINT_TYPE(long double);
 188 #else
 189                     PRINT_TYPE(double); /* Fake it and hope for the best.  */
 190 #endif
 191                   }
 192               }
 193               break;
 194             case 's':
 195               PRINT_TYPE(char *);
 196               break;
 197             case 'p':
 198               PRINT_TYPE(void *);
 199               break;
 200             case '%':
 201               PRINT_CHAR('%');
 202               break;
 203             default:
 204               abort();
 205             } /* End of switch (*ptr) */
 206         } /* End of else statement */
 207     }
 208
 209   return total_printed;
 210 }
 211
 212 #ifdef TEST
 213
 214 #include <math.h>
 215 #ifndef M_PI
 216 #define M_PI (3.1415926535897932385)
 217 #endif
 218
 219 #define RESULT(x) do \
 220 { \
 221     int i = (x); \
 222     printf ("printed %d characters\n", i); \
 223     fflush(stdin); \
 224 } while (0)
 225
 226 static int checkit PARAMS ((const char * format, ...)) ATTRIBUTE_PRINTF_1;
 227
 228 static int
 229 checkit VPARAMS ((const char* format, ...))
 230 {
 231   int result;
 232   VA_OPEN (args, format);
 233   VA_FIXEDARG (args, char *, format);
 234
 235   result = _doprnt (format, args, stdout);
 236   VA_CLOSE (args);
 237
 238   return result;
 239 }
 240
 241 int
 242 main ()
 243 {
 244   RESULT(checkit ("<%d>\n", 0x12345678));
 245   RESULT(printf ("<%d>\n", 0x12345678));
 246
 247   RESULT(checkit ("<%200d>\n", 5));
 248   RESULT(printf ("<%200d>\n", 5));
 249
 250   RESULT(checkit ("<%.300d>\n", 6));
 251   RESULT(printf ("<%.300d>\n", 6));
 252
 253   RESULT(checkit ("<%100.150d>\n", 7));
 254   RESULT(printf ("<%100.150d>\n", 7));
 255
 256   RESULT(checkit ("<%s>\n",
 257                   "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
 258 777777777777777777333333333333366666666666622222222222777777777777733333"));
 259   RESULT(printf ("<%s>\n",
 260                  "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
 261 777777777777777777333333333333366666666666622222222222777777777777733333"));
 262
 263   RESULT(checkit ("<%f><%0+#f>%s%d%s>\n",
 264                   1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
 265   RESULT(printf ("<%f><%0+#f>%s%d%s>\n",
 266                  1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
 267
 268   RESULT(checkit ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
 269   RESULT(printf ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
 270
 271   RESULT(checkit ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
 272   RESULT(printf ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
 273
 274   RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
 275                   75, 75, 75, 75, 75, 75, 75));
 276   RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
 277                  75, 75, 75, 75, 75, 75, 75));
 278
 279   RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
 280                   75, 75, 75, 75, 75, 75, 75));
 281   RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
 282                  75, 75, 75, 75, 75, 75, 75));
 283
 284   RESULT(checkit ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
 285   RESULT(printf ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
 286
 287 #if defined(__GNUC__) || defined (HAVE_LONG_LONG)
 288   RESULT(checkit ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
 289   RESULT(printf ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
 290   RESULT(checkit ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
 291   RESULT(printf ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
 292 #endif
 293
 294 #if defined(__GNUC__) || defined (HAVE_LONG_DOUBLE)
 295   RESULT(checkit ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
 296                   1.23456, 1.234567890123456789L, 1.23456));
 297   RESULT(printf ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
 298                  1.23456, 1.234567890123456789L, 1.23456));
 299 #endif
 300
 301   return 0;
 302 }
 303 #endif /* TEST */