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         default:
  76                 assert(0);
  77         }
  78         return 0;
  79 }
  80
  81 static inline size_t psi_t_size(token_t t)
  82 {
  83 #define PSI_SIZEOF(T) case PSI_T_## T : return SIZEOF_## T ##_T;
  84         switch (t) {
  85         PSI_SIZEOF(INT8);
  86         PSI_SIZEOF(UINT8);
  87         PSI_SIZEOF(INT16);
  88         PSI_SIZEOF(UINT16);
  89         PSI_SIZEOF(INT32);
  90         PSI_SIZEOF(UINT32);
  91         PSI_SIZEOF(INT64);
  92         PSI_SIZEOF(UINT64);
  93         case PSI_T_FLOAT:
  94                 return SIZEOF_FLOAT;
  95         case PSI_T_DOUBLE:
  96                 return SIZEOF_DOUBLE;
  97         case PSI_T_VOID:
  98         case PSI_T_POINTER:
  99         case PSI_T_FUNCTION:
 100                 return SIZEOF_VOID_P;
 101         case PSI_T_ENUM:
 102                 return SIZEOF_INT;
 103         default:
 104                 assert(!t);
 105         }
 106         return 0;
 107 }
 108
 109 static inline const char *psi_t_indent(unsigned level) {
 110         static const char indent[] =
 111                         "\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";
 112         return &indent[32 - MIN(32, level)];
 113 }
 114
 115 static inline const char *psi_t_indirection(unsigned pointer_level) {
 116         static const char indir[] = "********************************";
 117         return &indir[32 - MIN(32, pointer_level)];
 118 }
 119
 120 struct psi_token {
 121         token_t type;
 122         unsigned size, line, col;
 123         char *text, *file;
 124         char buf[1];
 125 };
 126
 127 struct psi_parser;
 128
 129 struct psi_token *psi_token_alloc(struct psi_parser *P);
 130 size_t psi_token_alloc_size(size_t token_len, size_t fname_len);
 131 struct psi_token *psi_token_copy(struct psi_token *src);
 132 struct psi_token *psi_token_cat(unsigned argc, ...);
 133 struct psi_token *psi_token_append(struct psi_token *T, unsigned argc, ...);
 134 struct psi_token *psi_token_translit(struct psi_token *T, char *from, char *to);
 135 uint64_t psi_token_hash(struct psi_token *t, char *digest_buf);
 136
 137 #endif