1 /* $OpenBSD: lint2.h,v 1.3 2005/11/20 17:42:50 deraadt Exp $ */ 2 /* $NetBSD: lint2.h,v 1.2 1995/07/03 21:24:49 cgd Exp $ */ 3 4 /* 5 * Copyright (c) 1994, 1995 Jochen Pohl 6 * All Rights Reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by Jochen Pohl for 19 * The NetBSD Project. 20 * 4. The name of the author may not be used to endorse or promote products 21 * derived from this software without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 29 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 33 */ 34 35 #include "lint.h" 36 37 /* 38 * Types are described by structures of type type_t. 39 */ 40 typedef struct type { 41 tspec_t t_tspec; /* type specifier */ 42 u_int t_const : 1; /* constant */ 43 u_int t_volatile : 1; /* volatile */ 44 u_int t_vararg : 1; /* function has variable number of arguments */ 45 u_int t_isenum : 1; /* enum type */ 46 u_int t_proto : 1; /* this is a prototype */ 47 u_int t_istag : 1; /* tag with _t_tag valid */ 48 u_int t_istynam : 1; /* tag with _t_tynam valid */ 49 union { 50 int _t_dim; /* if the type is an ARRAY than this 51 is the dimension of the array. */ 52 struct hte *_t_tag; /* hash table entry of tag if 53 t_isenum, STRUCT or UNION */ 54 struct hte *_t_tynam; /* hash table entry of typename if 55 t_isenum, STRUCT or UNION */ 56 struct type **_t_args; /* list of argument types if this 57 is a prototype */ 58 } t_u; 59 struct type *t_subt; /* indirected type (array element, pointed to 60 type, type of return value) */ 61 } type_t; 62 63 #define t_dim t_u._t_dim 64 #define t_tag t_u._t_tag 65 #define t_tynam t_u._t_tynam 66 #define t_args t_u._t_args 67 68 /* 69 * argument information 70 * 71 * Such a structure is created for each argument of a function call 72 * which is an integer constant or a constant string. 73 */ 74 typedef struct arginf { 75 int a_num; /* # of argument (1..) */ 76 u_int a_zero : 1; /* argument is 0 */ 77 u_int a_pcon : 1; /* msb of argument is not set */ 78 u_int a_ncon : 1; /* msb of argument is set */ 79 u_int a_fmt : 1; /* a_fstrg points to format string */ 80 char *a_fstrg; /* format string */ 81 struct arginf *a_nxt; /* information for next const. argument */ 82 } arginf_t; 83 84 /* 85 * Keeps information about position in source file. 86 */ 87 typedef struct { 88 u_short p_src; /* index of name of translation unit 89 (the name which was specified at the 90 command line) */ 91 u_short p_line; /* line number in p_src */ 92 u_short p_isrc; /* index of (included) file */ 93 u_short p_iline; /* line number in p_iline */ 94 } pos_t; 95 96 /* 97 * Used for definitions and declarations 98 * 99 * To save memory, variable sized structures are used. If 100 * all s_va, s_prfl and s_scfl are not set, the memory allocated 101 * for a symbol is only large enough to keep the first member of 102 * struct sym, s_s. 103 */ 104 typedef struct sym { 105 struct { 106 pos_t s_pos; /* pos of def./decl. */ 107 #ifndef lint 108 u_int s_def : 3; /* DECL, TDEF or DEF */ 109 #else 110 def_t s_def; 111 #endif 112 u_int s_rval : 1; /* function has return value */ 113 u_int s_osdef : 1; /* old style function definition */ 114 u_int s_static : 1; /* symbol is static */ 115 u_int s_va : 1; /* check only first s_nva arguments */ 116 u_int s_prfl : 1; /* printflike */ 117 u_int s_scfl : 1; /* scanflike */ 118 u_short s_type; /* type */ 119 struct sym *s_nxt; /* next symbol with same name */ 120 } s_s; 121 short s_nva; 122 short s_nprfl; 123 short s_nscfl; 124 } sym_t; 125 126 #define s_pos s_s.s_pos 127 #define s_rval s_s.s_rval 128 #define s_osdef s_s.s_osdef 129 #define s_static s_s.s_static 130 #define s_def s_s.s_def 131 #define s_va s_s.s_va 132 #define s_prfl s_s.s_prfl 133 #define s_scfl s_s.s_scfl 134 #define s_type s_s.s_type 135 #define s_nxt s_s.s_nxt 136 137 /* 138 * Used to store informations about function calls. 139 */ 140 typedef struct fcall { 141 pos_t f_pos; /* position of call */ 142 u_int f_rused : 1; /* return value used */ 143 u_int f_rdisc : 1; /* return value discarded (casted to void) */ 144 u_short f_type; /* types of expected return value and args */ 145 arginf_t *f_args; /* information about constant arguments */ 146 struct fcall *f_nxt; /* next call of same function */ 147 } fcall_t; 148 149 /* 150 * Used to store information about usage of symbols other 151 * than for function calls. 152 */ 153 typedef struct usym { 154 pos_t u_pos; /* position */ 155 struct usym *u_nxt; /* next usage */ 156 } usym_t; 157 158 /* 159 * hash table entry 160 */ 161 typedef struct hte { 162 const char *h_name; /* name */ 163 u_int h_used : 1; /* symbol is used */ 164 u_int h_def : 1; /* symbol is defined */ 165 u_int h_static : 1; /* static symbol */ 166 sym_t *h_syms; /* declarations and definitions */ 167 sym_t **h_lsym; /* points to s_nxt of last decl./def. */ 168 fcall_t *h_calls; /* function calls */ 169 fcall_t **h_lcall; /* points to f_nxt of last call */ 170 usym_t *h_usyms; /* usage info */ 171 usym_t **h_lusym; /* points to u_nxt of last usage info */ 172 struct hte *h_link; /* next hte with same hash function */ 173 } hte_t; 174 175 /* maps type indices into pointers to type structs */ 176 #define TP(idx) (tlst[idx]) 177 178 #include "externs2.h" 179