git.m6w6.name Git - m6w6/ext-psi/blob - src/token.h

   1 /*******************************************************************************
   2  Copyright (c) 2016, Michael Wallner <mike@php.net>.
   3  All rights reserved.
   4
   5  Redistribution and use in source and binary forms, with or without
   6  modification, are permitted provided that the following conditions are met:
   7
   8      * Redistributions of source code must retain the above copyright notice,
   9        this list of conditions and the following disclaimer.
  10      * Redistributions in binary form must reproduce the above copyright
  11        notice, this list of conditions and the following disclaimer in the
  12        documentation and/or other materials provided with the distribution.
  13
  14  THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  15  AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  16  IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
  17  DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
  18  FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  19  DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  20  SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  21  CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  22  OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  23  OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  24 *******************************************************************************/
  25
  26 #ifndef PSI_TOKEN_H
  27 #define PSI_TOKEN_H
  28
  29 #include <stddef.h>
  30 #include <stdarg.h>
  31 #include <stdint.h>
  32 #include <assert.h>
  33 #include <sys/param.h>
  34
  35 static inline size_t psi_align(size_t s, size_t a) {
  36         return ((s - 1) | (a - 1)) + 1;
  37 }
  38
  39 static inline size_t psi_offset_padding(size_t diff, size_t alignment) {
  40         if (diff && diff <= psi_align(diff, alignment)) {
  41                 diff = 0;
  42         }
  43
  44         return diff;
  45 }
  46
  47 #include "parser_proc.h"
  48
  49 #define PSI_T_POINTER PSI_T_ASTERISK
  50 #define PSI_T_LONG_DOUBLE (PSI_T_DOUBLE << 16)
  51
  52 typedef int token_t;
  53
  54 static inline size_t psi_t_alignment(token_t t)
  55 {
  56 #define PSI_ALIGNOF(T) case PSI_T_## T: return ALIGNOF_## T ##_T;
  57         switch (t) {
  58         PSI_ALIGNOF(INT8);
  59         PSI_ALIGNOF(UINT8);
  60         PSI_ALIGNOF(INT16);
  61         PSI_ALIGNOF(UINT16);
  62         PSI_ALIGNOF(INT32);
  63         PSI_ALIGNOF(UINT32);
  64         PSI_ALIGNOF(INT64);
  65         PSI_ALIGNOF(UINT64);
  66         case PSI_T_FLOAT:
  67                 return ALIGNOF_FLOAT;
  68         case PSI_T_DOUBLE:
  69                 return ALIGNOF_DOUBLE;
  70         case PSI_T_POINTER:
  71         case PSI_T_FUNCTION:
  72                 return ALIGNOF_VOID_P;
  73         case PSI_T_ENUM:
  74                 return ALIGNOF_INT;
  75 #ifdef HAVE_LONG_DOUBLE
  76         case PSI_T_LONG_DOUBLE:
  77                 return ALIGNOF_LONG_DOUBLE;
  78 #endif
  79         default:
  80                 assert(0);
  81         }
  82         return 0;
  83 }
  84
  85 static inline size_t psi_t_size(token_t t)
  86 {
  87 #define PSI_SIZEOF(T) case PSI_T_## T : return SIZEOF_## T ##_T;
  88         switch (t) {
  89         PSI_SIZEOF(INT8);
  90         PSI_SIZEOF(UINT8);
  91         PSI_SIZEOF(INT16);
  92         PSI_SIZEOF(UINT16);
  93         PSI_SIZEOF(INT32);
  94         PSI_SIZEOF(UINT32);
  95         PSI_SIZEOF(INT64);
  96         PSI_SIZEOF(UINT64);
  97         case PSI_T_FLOAT:
  98                 return SIZEOF_FLOAT;
  99         case PSI_T_DOUBLE:
 100                 return SIZEOF_DOUBLE;
 101         case PSI_T_VOID:
 102         case PSI_T_POINTER:
 103         case PSI_T_FUNCTION:
 104                 return SIZEOF_VOID_P;
 105         case PSI_T_ENUM:
 106                 return SIZEOF_INT;
 107 #ifdef HAVE_LONG_DOUBLE
 108         case PSI_T_LONG_DOUBLE:
 109                 return SIZEOF_LONG_DOUBLE;
 110 #endif
 111         default:
 112                 assert(!t);
 113         }
 114         return 0;
 115 }
 116
 117 static inline const char *psi_t_indent(unsigned level) {
 118         static const char indent[] =
 119                         "\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t";
 120         return &indent[32 - MIN(32, level)];
 121 }
 122
 123 static inline const char *psi_t_indirection(unsigned pointer_level) {
 124         static const char indir[] = "********************************";
 125         return &indir[32 - MIN(32, pointer_level)];
 126 }
 127
 128 struct psi_token {
 129         token_t type;
 130         unsigned size, line, col;
 131         char *text, *file;
 132         char buf[1];
 133 };
 134
 135 struct psi_parser;
 136
 137 struct psi_token *psi_token_alloc(struct psi_parser *P);
 138 size_t psi_token_alloc_size(size_t token_len, size_t fname_len);
 139 struct psi_token *psi_token_copy(struct psi_token *src);
 140 struct psi_token *psi_token_cat(unsigned argc, ...);
 141 struct psi_token *psi_token_append(struct psi_token *T, unsigned argc, ...);
 142 struct psi_token *psi_token_translit(struct psi_token *T, char *from, char *to);
 143 uint64_t psi_token_hash(struct psi_token *t, char *digest_buf);
 144
 145 #endif