gcc/doprint.c

   1 /* Provide a version _doprnt in terms of fprintf.
   2    Copyright (C) 1998, 1999, 2000 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 "system.h"
  21 #undef _doprnt
  22
  23 #ifdef TEST /* Make sure to use the internal one. */
  24 #define _doprnt my_doprnt
  25 #endif
  26
  27 #define COPY_VA_INT \
  28   do { \
  29          const int value = abs (va_arg (ap, int)); \
  30          char buf[32]; \
  31          ptr++; /* Go past the asterisk. */ \
  32          *sptr = '\0'; /* NULL terminate sptr. */ \
  33          sprintf(buf, "%d", value); \
  34          strcat(sptr, buf); \
  35          while (*sptr) sptr++; \
  36      } while (0)
  37
  38 #define PRINT_CHAR(CHAR) \
  39   do { \
  40          putc(CHAR, stream); \
  41          ptr++; \
  42          total_printed++; \
  43          continue; \
  44      } while (0)
  45
  46 #define PRINT_TYPE(TYPE) \
  47   do { \
  48         int result; \
  49         TYPE value = va_arg (ap, TYPE); \
  50         *sptr++ = *ptr++; /* Copy the type specifier. */ \
  51         *sptr = '\0'; /* NULL terminate sptr. */ \
  52         result = fprintf(stream, specifier, value); \
  53         if (result == -1) \
  54           return -1; \
  55         else \
  56           { \
  57             total_printed += result; \
  58             continue; \
  59           } \
  60       } while (0)
  61
  62 int
  63 _doprnt (format, ap, stream)
  64   const char * format;
  65   va_list ap;
  66   FILE * stream;
  67 {
  68   const char * ptr = format;
  69   char specifier[128];
  70   int total_printed = 0;
  71
  72   while (*ptr != '\0')
  73     {
  74       if (*ptr != '%') /* While we have regular characters, print them. */
  75         PRINT_CHAR(*ptr);
  76       else /* We got a format specifier! */
  77         {
  78           char * sptr = specifier;
  79           int wide_width = 0, short_width = 0;
  80
  81           *sptr++ = *ptr++; /* Copy the % and move forward. */
  82
  83           while (strchr ("-+ #0", *ptr)) /* Move past flags. */
  84             *sptr++ = *ptr++;
  85
  86           if (*ptr == '*')
  87             COPY_VA_INT;
  88           else
  89             while (ISDIGIT(*ptr)) /* Handle explicit numeric value. */
  90               *sptr++ = *ptr++;
  91
  92           if (*ptr == '.')
  93             {
  94               *sptr++ = *ptr++; /* Copy and go past the period. */
  95               if (*ptr == '*')
  96                 COPY_VA_INT;
  97               else
  98                 while (ISDIGIT(*ptr)) /* Handle explicit numeric value. */
  99                   *sptr++ = *ptr++;
 100             }
 101           while (strchr ("hlL", *ptr))
 102             {
 103               switch (*ptr)
 104                 {
 105                 case 'h':
 106                   short_width = 1;
 107                   break;
 108                 case 'l':
 109                   wide_width++;
 110                   break;
 111                 case 'L':
 112                   wide_width = 2;
 113                   break;
 114                 default:
 115                   abort();
 116                 }
 117               *sptr++ = *ptr++;
 118             }
 119
 120           switch (*ptr)
 121             {
 122             case 'd':
 123             case 'i':
 124             case 'o':
 125             case 'u':
 126             case 'x':
 127             case 'X':
 128             case 'c':
 129               {
 130                 /* Short values are promoted to int, so just copy it
 131                    as an int and trust the C library printf to cast it
 132                    to the right width. */
 133                 if (short_width)
 134                   PRINT_TYPE(int);
 135                 else
 136                   {
 137                     switch (wide_width)
 138                       {
 139                       case 0:
 140                         PRINT_TYPE(int);
 141                         break;
 142                       case 1:
 143                         PRINT_TYPE(long);
 144                         break;
 145                       case 2:
 146                       default:
 147 #if defined(__GNUC__) || defined(HAVE_LONG_LONG)
 148                         PRINT_TYPE(long long);
 149 #else
 150                         PRINT_TYPE(long); /* Fake it and hope for the best. */
 151 #endif
 152                         break;
 153                       } /* End of switch (wide_width) */
 154                   } /* End of else statement */
 155               } /* End of integer case */
 156               break;
 157             case 'f':
 158             case 'e':
 159             case 'E':
 160             case 'g':
 161             case 'G':
 162               {
 163                 if (wide_width == 0)
 164                   PRINT_TYPE(double);
 165                 else
 166                   {
 167 #if defined(__GNUC__) || defined(HAVE_LONG_DOUBLE)
 168                     PRINT_TYPE(long double);
 169 #else
 170                     PRINT_TYPE(double); /* Fake it and hope for the best. */
 171 #endif
 172                   }
 173               }
 174               break;
 175             case 's':
 176               PRINT_TYPE(char *);
 177               break;
 178             case 'p':
 179               PRINT_TYPE(void *);
 180               break;
 181             case '%':
 182               PRINT_CHAR('%');
 183               break;
 184             default:
 185               abort();
 186             } /* End of switch (*ptr) */
 187         } /* End of else statement */
 188     }
 189
 190   return total_printed;
 191 }
 192
 193 #ifdef TEST
 194
 195 #include <math.h>
 196 #ifndef M_PI
 197 #define M_PI (3.1415926535897932385)
 198 #endif
 199
 200 #define RESULT(x) do \
 201 { \
 202     int i = (x); \
 203     printf ("printed %d characters\n", i); \
 204     fflush(stdin); \
 205 } while (0)
 206
 207 static int checkit PARAMS ((const char * format, ...)) ATTRIBUTE_PRINTF_1;
 208
 209 static int
 210 checkit VPARAMS ((const char* format, ...))
 211 {
 212   va_list args;
 213   int result;
 214
 215 #ifndef ANSI_PROTOTYPES
 216   char *format;
 217 #endif
 218
 219   VA_START (args, format);
 220
 221 #ifndef ANSI_PROTOTYPES
 222   format = va_arg (args, char *);
 223 #endif
 224
 225   result = _doprnt (format, args, stdout);
 226   va_end(args);
 227
 228   return result;
 229 }
 230
 231 int
 232 main ()
 233 {
 234   RESULT(checkit ("<%d>\n", 0x12345678));
 235   RESULT(printf ("<%d>\n", 0x12345678));
 236
 237   RESULT(checkit ("<%200d>\n", 5));
 238   RESULT(printf ("<%200d>\n", 5));
 239
 240   RESULT(checkit ("<%.300d>\n", 6));
 241   RESULT(printf ("<%.300d>\n", 6));
 242
 243   RESULT(checkit ("<%100.150d>\n", 7));
 244   RESULT(printf ("<%100.150d>\n", 7));
 245
 246   RESULT(checkit ("<%s>\n",
 247                   "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
 248 777777777777777777333333333333366666666666622222222222777777777777733333"));
 249   RESULT(printf ("<%s>\n",
 250                  "jjjjjjjjjiiiiiiiiiiiiiiioooooooooooooooooppppppppppppaa\n\
 251 777777777777777777333333333333366666666666622222222222777777777777733333"));
 252
 253   RESULT(checkit ("<%f><%0+#f>%s%d%s>\n",
 254                   1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
 255   RESULT(printf ("<%f><%0+#f>%s%d%s>\n",
 256                  1.0, 1.0, "foo", 77, "asdjffffffffffffffiiiiiiiiiiixxxxx"));
 257
 258   RESULT(checkit ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
 259   RESULT(printf ("<%4f><%.4f><%%><%4.4f>\n", M_PI, M_PI, M_PI));
 260
 261   RESULT(checkit ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
 262   RESULT(printf ("<%*f><%.*f><%%><%*.*f>\n", 3, M_PI, 3, M_PI, 3, 3, M_PI));
 263
 264   RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
 265                   75, 75, 75, 75, 75, 75, 75));
 266   RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
 267                  75, 75, 75, 75, 75, 75, 75));
 268
 269   RESULT(checkit ("<%d><%i><%o><%u><%x><%X><%c>\n",
 270                   75, 75, 75, 75, 75, 75, 75));
 271   RESULT(printf ("<%d><%i><%o><%u><%x><%X><%c>\n",
 272                  75, 75, 75, 75, 75, 75, 75));
 273
 274   RESULT(checkit ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
 275   RESULT(printf ("Testing (hd) short: <%d><%ld><%hd><%hd><%d>\n", 123, (long)234, 345, 123456789, 456));
 276
 277 #if defined(__GNUC__) || defined (HAVE_LONG_LONG)
 278   RESULT(checkit ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
 279   RESULT(printf ("Testing (lld) long long: <%d><%lld><%d>\n", 123, 234234234234234234LL, 345));
 280   RESULT(checkit ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
 281   RESULT(printf ("Testing (Ld) long long: <%d><%Ld><%d>\n", 123, 234234234234234234LL, 345));
 282 #endif
 283
 284 #if defined(__GNUC__) || defined (HAVE_LONG_DOUBLE)
 285   RESULT(checkit ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
 286                   1.23456, 1.234567890123456789L, 1.23456));
 287   RESULT(printf ("Testing (Lf) long double: <%.20f><%.20Lf><%0+#.20f>\n",
 288                  1.23456, 1.234567890123456789L, 1.23456));
 289 #endif
 290
 291   return 0;
 292 }
 293 #endif /* TEST */