gcc/java/lex.h

   1 /* Language lexer definitions for the GNU compiler for the Java(TM) language.
   2    Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004
   3    Free Software Foundation, Inc.
   4    Contributed by Alexandre Petit-Bianco (apbianco@cygnus.com)
   5
   6 This file is part of GCC.
   7
   8 GCC is free software; you can redistribute it and/or modify
   9 it under the terms of the GNU General Public License as published by
  10 the Free Software Foundation; either version 2, or (at your option)
  11 any later version.
  12
  13 GCC is distributed in the hope that it will be useful,
  14 but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16 GNU General Public License for more details.
  17
  18 You should have received a copy of the GNU General Public License
  19 along with GCC; see the file COPYING.  If not, write to
  20 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  21 Boston, MA 02110-1301, USA.
  22
  23 Java and all Java-based marks are trademarks or registered trademarks
  24 of Sun Microsystems, Inc. in the United States and other countries.
  25 The Free Software Foundation is independent of Sun Microsystems, Inc.  */
  26
  27 #ifndef GCC_JAVA_LEX_H
  28 #define GCC_JAVA_LEX_H
  29
  30 #include "input.h"
  31
  32 /* Extern global variables declarations  */
  33 extern FILE *finput;
  34
  35 /* A Unicode character, as read from the input file  */
  36 typedef unsigned short unicode_t;
  37
  38 #ifndef HAVE_ICONV_H
  39 #undef HAVE_ICONV
  40 #endif
  41
  42 #if defined HAVE_ICONV
  43 #include <iconv.h>
  44 #endif /* HAVE_ICONV */
  45
  46 /* Default encoding to use if no encoding is specified.  */
  47 #define DEFAULT_ENCODING "UTF-8"
  48
  49 typedef struct java_lc_s GTY(()) {
  50   int line;             /* line number (1-based) */
  51   int col;              /* column number number (1-based) */
  52 } java_lc;
  53
  54 struct java_lexer
  55 {
  56   /* The file from which we're reading.  */
  57   FILE *finput;
  58
  59   /* Number of consecutive backslashes we've read.  */
  60   int bs_count;
  61
  62   /* Next available Unicode character.
  63    * This is post-Unicode-escape-processing. -1 if EOF. */
  64   int next_unicode;
  65
  66   /* True if next_unicode is next available character, or EOF. */
  67   bool avail_unicode;
  68
  69   /* Number of source columns of the previous Unicode character (next_unicode).
  70      If next_unicode==-2, then this is the number of columns of the previous
  71      Unicode character (most recent result of java_{get,peek}_unicode). */
  72   int next_columns;
  73
  74   /* If nonzero, a value that was pushed back.  This is a unicode character,
  75      but (unlike next_unicode) is pre-'\uXXXX'-processing.  It is also used
  76      when a '\r' is *not* followed by a '\n'. */
  77   unicode_t unget_value;
  78
  79   /* Name of the character encoding we're using.  */
  80   const char *encoding;
  81
  82   /* Current source position. */
  83   java_lc position;
  84
  85 #ifndef USE_MAPPED_LOCATION
  86   java_lc token_start;               /* Error's line column info */
  87 #endif
  88
  89 #ifdef HAVE_ICONV
  90   /* Nonzero if we've read any bytes.  We only recognize the
  91      byte-order-marker (BOM) as the first word.  */
  92   unsigned int read_anything : 1;
  93
  94   /* Nonzero if we have to byte swap.  */
  95   unsigned int byte_swap : 1;
  96
  97   /* Nonzero if we're using the fallback decoder.  */
  98   unsigned int use_fallback : 1;
  99
 100   /* The handle for the iconv converter we're using.  */
 101   iconv_t handle;
 102
 103   /* Bytes we've read from the file but have not sent to iconv.  */
 104   char buffer[1024];
 105
 106   /* Index of first valid character in buffer, -1 if no valid
 107      characters.  */
 108   int first;
 109
 110   /* Index of last valid character in buffer, plus one.  -1 if no
 111      valid characters in buffer.  */
 112   int last;
 113
 114   /* This is a buffer of characters already converted by iconv.  We
 115      use `char' here because we're assuming that iconv() converts to
 116      UCS-2, and then we convert it ourselves.  */
 117   unsigned char out_buffer[1024];
 118
 119   /* Index of first valid output character.  -1 if no valid
 120      characters.  */
 121   int out_first;
 122
 123   /* Index of last valid output character, plus one.  -1 if no valid
 124      characters.  */
 125   int out_last;
 126
 127 #endif /* HAVE_ICONV */
 128 };
 129 typedef struct java_lexer java_lexer;
 130
 131 /* Destroy a lexer object.  */
 132 extern void java_destroy_lexer (java_lexer *);
 133
 134 #define JAVA_LINE_MAX 80
 135
 136 /* Build a location compound integer */
 137 #ifdef USE_MAPPED_LOCATION
 138 #define BUILD_LOCATION() input_location
 139 #else
 140 #define BUILD_LOCATION() ((ctxp->lexer->token_start.line << 12) \
 141                           | (ctxp->lexer->token_start.col & 0xfff))
 142 #endif
 143
 144 /* Those macros are defined differently if we compile jc1-lite
 145    (JC1_LITE defined) or jc1.  */
 146 #ifdef JC1_LITE
 147
 148 #define DCONST0 0
 149 #define REAL_VALUE_TYPE int
 150 #define GET_IDENTIFIER(S) xstrdup ((S))
 151 #define REAL_VALUE_ATOF(LIT,MODE) 0
 152 #define REAL_VALUE_ISINF(VALUE)   0
 153 #define REAL_VALUE_ISNAN(VALUE)   0
 154 #define SET_REAL_VALUE_ATOF(TARGET,SOURCE)
 155 #define FLOAT_TYPE_NODE 0
 156 #define DOUBLE_TYPE_NODE 0
 157 #define SET_MODIFIER_CTX(TOKEN) java_lval->value = (TOKEN)
 158 #define GET_TYPE_PRECISION(NODE) 4
 159 #define BUILD_OPERATOR(TOKEN)   return TOKEN
 160 #define BUILD_OPERATOR2(TOKEN)  return ASSIGN_ANY_TK
 161 #define SET_LVAL_NODE(NODE)
 162 #define BUILD_ID_WFL(EXP) (EXP)
 163 #define JAVA_FLOAT_RANGE_ERROR(S) {}
 164 #define JAVA_RANGE_ERROR(S) do { } while (0)
 165
 166 #else
 167
 168 #define DCONST0 dconst0
 169 #define GET_IDENTIFIER(S) get_identifier ((S))
 170 #define SET_REAL_VALUE_ATOF(TARGET,SOURCE) (TARGET) = (SOURCE)
 171 #define FLOAT_TYPE_NODE float_type_node
 172 #define DOUBLE_TYPE_NODE double_type_node
 173 /* Set modifier_ctx according to TOKEN */
 174 #define SET_MODIFIER_CTX(TOKEN)                                            \
 175   {                                                                        \
 176     ctxp->modifier_ctx [(TOKEN)-PUBLIC_TK] = build_wfl_node (NULL_TREE); \
 177     java_lval->value = (TOKEN)-PUBLIC_TK;                                  \
 178   }
 179 /* Type precision for long */
 180 #define GET_TYPE_PRECISION(NODE) TYPE_PRECISION (long_type_node) / 8;
 181 /* Build an operator tree node and return TOKEN */
 182 #define BUILD_OPERATOR(TOKEN)                           \
 183   {                                                     \
 184     java_lval->operator.token = (TOKEN);                \
 185     java_lval->operator.location = BUILD_LOCATION();    \
 186     return (TOKEN);                                     \
 187   }
 188
 189 /* Build an operator tree node but return ASSIGN_ANY_TK */
 190 #define BUILD_OPERATOR2(TOKEN)                          \
 191   {                                                     \
 192     java_lval->operator.token = (TOKEN);                \
 193     java_lval->operator.location = BUILD_LOCATION();    \
 194     return ASSIGN_ANY_TK;                               \
 195   }
 196 /* Set java_lval->node and TREE_TYPE(java_lval->node) in macros */
 197 #define SET_LVAL_NODE(NODE) java_lval->node = (NODE)
 198 /* Wrap identifier around a wfl */
 199 #define BUILD_ID_WFL(EXP) build_wfl_node ((EXP))
 200 /* Special ways to report error on numeric literals  */
 201 #define JAVA_FLOAT_RANGE_ERROR(m)                                       \
 202   {                                                                     \
 203     char *msg = xmalloc (100 + strlen (m));                             \
 204     sprintf (msg, "Floating point literal exceeds range of `%s'", (m)); \
 205     JAVA_RANGE_ERROR(msg);                                              \
 206     free (msg);                                                         \
 207   }
 208 #define JAVA_RANGE_ERROR(msg)                                           \
 209   do {                                                                  \
 210     int save_col = ctxp->lexer->position.col;                           \
 211     ctxp->lexer->position.col = number_beginning;                       \
 212     java_lex_error (msg, 0);                                            \
 213     ctxp->lexer->position.col = save_col;                               \
 214   } while (0)
 215
 216 #endif /* Definitions for jc1 compilation only */
 217
 218 /* Macros to decode character ranges */
 219 #define RANGE(c, l, h)           (((c) >= l && (c) <= h))
 220 #define JAVA_WHITE_SPACE_P(c) (c == ' ' || c == '\t' || c == '\f')
 221 #define JAVA_START_CHAR_P(c) ((c < 128                                        \
 222                                && (ISIDST (c) || c == '$'))                   \
 223                               || (c >= 128 && java_start_char_p (c)))
 224 #define JAVA_PART_CHAR_P(c) ((c < 128                                         \
 225                                && (ISIDNUM (c)                                \
 226                                    || c == '$'                                \
 227                                    || c == 0x0000                             \
 228                                    || RANGE (c, 0x01, 0x08)                   \
 229                                    || RANGE (c, 0x0e, 0x1b)                   \
 230                                    || c == 0x7f))                             \
 231                               || (c >= 128 && java_part_char_p (c)))
 232 #define JAVA_ASCII_DIGIT(c)    ISDIGIT (c)
 233 #define JAVA_ASCII_OCTDIGIT(c) RANGE (c, '0', '7')
 234 #define JAVA_ASCII_HEXDIGIT(c) ISXDIGIT (c)
 235 #define JAVA_ASCII_FPCHAR(c)   (RANGE (c, 'd', 'f') || RANGE (c, 'D', 'F') || \
 236                                 c == '.' || JAVA_ASCII_DIGIT (c))
 237 #define JAVA_FP_SUFFIX(c)      (c == 'D' || c == 'd' || c == 'f' || c == 'F')
 238 #define JAVA_FP_EXP(c)         (c == 'E' || c == 'F')
 239 #define JAVA_FP_PM(c)          (c == '-' || c == '+')
 240 #define JAVA_ASCII_LETTER(c)   ISALPHA (c)
 241
 242 /* Constants  */
 243 #define JAVA_READ_BUFFER 256
 244 #define JAVA_CHAR_ERROR -2
 245 #define UEOF -1
 246
 247 #endif /* ! GCC_JAVA_LEX_H */