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_POINTER:
  98         case PSI_T_FUNCTION:
  99                 return SIZEOF_VOID_P;
 100         case PSI_T_ENUM:
 101                 return SIZEOF_INT;
 102         default:
 103                 assert(0);
 104         }
 105         return 0;
 106 }
 107
 108 static inline const char *psi_t_indent(unsigned level) {
 109         static const char indent[] =
 110                         "\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";
 111         return &indent[32 - MIN(32, level)];
 112 }
 113
 114 static inline const char *psi_t_indirection(unsigned pointer_level) {
 115         static const char indir[] = "********************************";
 116         return &indir[32 - MIN(32, pointer_level)];
 117 }
 118
 119 struct psi_token {
 120         token_t type;
 121         unsigned size, line, col;
 122         char *text, *file;
 123         char buf[1];
 124 };
 125
 126 struct psi_parser;
 127
 128 struct psi_token *psi_token_alloc(struct psi_parser *P);
 129 size_t psi_token_alloc_size(size_t token_len, size_t fname_len);
 130 struct psi_token *psi_token_copy(struct psi_token *src);
 131 struct psi_token *psi_token_cat(unsigned argc, ...);
 132 struct psi_token *psi_token_append(struct psi_token *T, unsigned argc, ...);
 133 struct psi_token *psi_token_translit(struct psi_token *T, char *from, char *to);
 134 uint64_t psi_token_hash(struct psi_token *t, char *digest_buf);
 135
 136 #endif