gcc/doprint.c

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