libiberty/_doprnt.c

   1 /* Provide a version of _doprnt in terms of fprintf.
   2    Copyright (C) 1998-2020 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, 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 #include "config.h"
  20 #include "ansidecl.h"
  21 #include "safe-ctype.h"
  22
  23 #include <stdio.h>
  24 #include <stdarg.h>
  25 #ifdef HAVE_STRING_H
  26 #include <string.h>
  27 #endif
  28 #ifdef HAVE_STDLIB_H
  29 #include <stdlib.h>
  30 #endif
  31
  32 #undef _doprnt
  33
  34 #ifdef HAVE__DOPRNT
  35 #define TEST
  36 #endif
  37
  38 #ifdef TEST /* Make sure to use the internal one.  */
  39 #define _doprnt my_doprnt
  40 #endif
  41
  42 #define COPY_VA_INT \
  43   do { \
  44          const int value = abs (va_arg (ap, int)); \
  45          char buf[32]; \
  46          ptr++; /* Go past the asterisk.  */ \
  47          *sptr = '\0'; /* NULL terminate sptr.  */ \
  48          sprintf(buf, "%d", value); \
  49          strcat(sptr, buf); \
  50          while (*sptr) sptr++; \
  51      } while (0)
  52
  53 #define PRINT_CHAR(CHAR) \
  54   do { \
  55          putc(CHAR, stream); \
  56          ptr++; \
  57          total_printed++; \
  58          continue; \
  59      } while (0)
  60
  61 #define PRINT_TYPE(TYPE) \
  62   do { \
  63         int result; \
  64         TYPE value = va_arg (ap, TYPE); \
  65         *sptr++ = *ptr++; /* Copy the type specifier.  */ \
  66         *sptr = '\0'; /* NULL terminate sptr.  */ \
  67         result = fprintf(stream, specifier, value); \
  68         if (result == -1) \
  69           return -1; \
  70         else \
  71           { \
  72             total_printed += result; \
  73             continue; \
  74           } \
  75       } while (0)
  76
  77 int
  78 _doprnt (const char *format, va_list ap, FILE *stream)
  79 {
  80   const char * ptr = format;
  81   char specifier[128];
  82   int total_printed = 0;
  83
  84   while (*ptr != '\0')
  85     {
  86       if (*ptr != '%') /* While we have regular characters, print them.  */
  87         PRINT_CHAR(*ptr);
  88       else /* We got a format specifier! */
  89         {
  90           char * sptr = specifier;
  91           int wide_width = 0, short_width = 0;
  92
  93           *sptr++ = *ptr++; /* Copy the % and move forward.  */
  94
  95           while (strchr ("-+ #0", *ptr)) /* Move past flags.  */
  96             *sptr++ = *ptr++;
  97
  98           if (*ptr == '*')
  99             COPY_VA_INT;
 100           else
 101             while (ISDIGIT(*ptr)) /* Handle explicit numeric value.  */
 102               *sptr++ = *ptr++;
 103
 104           if (*ptr == '.')
 105             {
 106               *sptr++ = *ptr++; /* Copy and go past the period.  */
 107               if (*ptr == '*')
 108                 COPY_VA_INT;
 109               else
 110                 while (ISDIGIT(*ptr)) /* Handle explicit numeric value.  */
 111                   *sptr++ = *ptr++;
 112             }
 113           while (strchr ("hlL", *ptr))
 114             {
 115               switch (*ptr)
 116                 {
 117                 case 'h':
 118                   short_width = 1;
 119                   break;
 120                 case 'l':
 121                   wide_width++;
 122                   break;
 123                 case 'L':
 124                   wide_width = 2;
 125                   break;
 126                 default:
 127                   abort();
 128                 }
 129               *sptr++ = *ptr++;
 130             }
 131
 132           switch (*ptr)
 133             {
 134             case 'd':
 135             case 'i':
 136             case 'o':
 137             case 'u':
 138             case 'x':
 139             case 'X':
 140             case 'c':
 141               {
 142                 /* Short values are promoted to int, so just copy it
 143                    as an int and trust the C library printf to cast it
 144                    to the right width.  */
 145                 if (short_width)
 146                   PRINT_TYPE(int);
 147                 else
 148                   {
 149                     switch (wide_width)
 150                       {
 151                       case 0:
 152                         PRINT_TYPE(int);
 153                         break;
 154                       case 1:
 155                         PRINT_TYPE(long);
 156                         break;
 157                       case 2:
 158                       default:
 159 #if defined(__GNUC__) || defined(HAVE_LONG_LONG)
 160                         PRINT_TYPE(long long);
 161 #else
 162                         PRINT_TYPE(long); /* Fake it and hope for the best.  */
 163 #endif
 164                         break;
 165                       } /* End of switch (wide_width) */
 166                   } /* End of else statement */
 167               } /* End of integer case */
 168               break;
 169             case 'f':
 170             case 'e':
 171             case 'E':
 172             case 'g':
 173             case 'G':
 174               {
 175                 if (wide_width == 0)
 176                   PRINT_TYPE(double);
 177                 else
 178                   {
 179 #if defined(__GNUC__) || defined(HAVE_LONG_DOUBLE)
 180                     PRINT_TYPE(long double);
 181 #else
 182                     PRINT_TYPE(double); /* Fake it and hope for the best.  */
 183 #endif
 184                   }
 185               }
 186               break;
 187             case 's':
 188               PRINT_TYPE(char *);
 189               break;
 190             case 'p':
 191               PRINT_TYPE(void *);
 192               break;
 193             case '%':
 194               PRINT_CHAR('%');
 195               break;
 196             default:
 197               abort();
 198             } /* End of switch (*ptr) */
 199         } /* End of else statement */
 200     }
 201
 202   return total_printed;
 203 }
 204
 205 #ifdef TEST
 206
 207 #include <math.h>
 208 #ifndef M_PI
 209 #define M_PI (3.1415926535897932385)
 210 #endif
 211
 212 #define RESULT(x) do \
 213 { \
 214     int i = (x); \
 215     printf ("printed %d characters\n", i); \
 216     fflush(stdin); \
 217 } while (0)
 218
 219 static int checkit (const char * format, ...) ATTRIBUTE_PRINTF_1;
 220
 221 static int
 222 checkit (const char* format, ...)
 223 {
 224   int result;
 225   va_list args;
 226   va_start (args, format);
 227
 228   result = _doprnt (format, args, stdout);
 229   va_end (args);
 230
 231   return result;
 232 }
 233
 234 int
 235 main (void)
 236 {
 237   RESULT(checkit ("<%d>\n", 0x12345678));
 238   RESULT(printf ("<%d>\n", 0x12345678));
 239
 240   RESULT(checkit ("<%200d>\n", 5));
 241   RESULT(printf ("<%200d>\n", 5));
 242
 243   RESULT(checkit ("<%.300d>\n", 6));
 244   RESULT(printf ("<%.300d>\n", 6));
 245
 246   RESULT(checkit ("<%100.150d>\n", 7));
 247   RESULT(printf ("<%100.150d>\n", 7));
 248
 249   RESULT(checkit ("<%s>\n",
 250                   "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
 251 777777777777777777333333333333366666666666622222222222777777777777733333"));
 252   RESULT(printf ("<%s>\n",
 253                  "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
 254 777777777777777777333333333333366666666666622222222222777777777777733333"));
 255
 256   RESULT(checkit ("<%f><%0+#f>%s%d%s>\n",
 257                   1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
 258   RESULT(printf ("<%f><%0+#f>%s%d%s>\n",
 259                  1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
 260
 261   RESULT(checkit ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
 262   RESULT(printf ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
 263
 264   RESULT(checkit ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
 265   RESULT(printf ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
 266
 267   RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
 268                   75, 75, 75, 75, 75, 75, 75));
 269   RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
 270                  75, 75, 75, 75, 75, 75, 75));
 271
 272   RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
 273                   75, 75, 75, 75, 75, 75, 75));
 274   RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
 275                  75, 75, 75, 75, 75, 75, 75));
 276
 277   RESULT(checkit ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
 278   RESULT(printf ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
 279
 280 #if defined(__GNUC__) || defined (HAVE_LONG_LONG)
 281   RESULT(checkit ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
 282   RESULT(printf ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
 283   RESULT(checkit ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
 284   RESULT(printf ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
 285 #endif
 286
 287 #if defined(__GNUC__) || defined (HAVE_LONG_DOUBLE)
 288   RESULT(checkit ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
 289                   1.23456, 1.234567890123456789L, 1.23456));
 290   RESULT(printf ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
 291                  1.23456, 1.234567890123456789L, 1.23456));
 292 #endif
 293
 294   return 0;
 295 }
 296 #endif /* TEST */