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freebsd-skq/usr.bin/xlint/lint1/err.c
pfg 6b0fe69346 xlint: update. 
Bring some important updates from NetBSD up to about 2008/04/25.
The main feature is initial support for C99.

This is a very basic update to make it easier to merge new
compiler attirbutes but more updates are likely to follow.

Obtained from:	NetBSD
MFC after:	2 weeks
2015-03-23 18:45:29 +00:00

553 lines
23 KiB
C
Raw Blame History

/* $NetBSD: err.c,v 1.40 2009/04/15 01:20:57 christos Exp $ */
/*
* Copyright (c) 1994, 1995 Jochen Pohl
* All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Jochen Pohl for
* The NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#if defined(__RCSID) && !defined(lint)
__RCSID("$NetBSD: err.c,v 1.40 2009/04/15 01:20:57 christos Exp $");
#endif
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#include <stdlib.h>
#include <stdarg.h>
#include "lint1.h"
/* number of errors found */
int nerr;
/* number of syntax errors */
int sytxerr;
static const char *lbasename(const char *);
static void verror(int, va_list);
static void vwarning(int, va_list);
const char *msgs[] = {
"syntax error: empty declaration", /* 0 */
"old style declaration; add int", /* 1 */
"empty declaration", /* 2 */
"%s declared in argument declaration list", /* 3 */
"illegal type combination", /* 4 */
"modifying typedef with '%s'; only qualifiers allowed", /* 5 */
"use 'double' instead of 'long float'", /* 6 */
"only one storage class allowed", /* 7 */
"illegal storage class", /* 8 */
"only register valid as formal parameter storage class", /* 9 */
"duplicate '%s'", /* 10 */
"bit-field initializer out of range", /* 11 */
"compiler takes size of function", /* 12 */
"incomplete enum type: %s", /* 13 */
"compiler takes alignment of function", /* 14 */
"function returns illegal type", /* 15 */
"array of function is illegal", /* 16 */
"null dimension", /* 17 */
"illegal use of 'void'", /* 18 */
"void type for %s", /* 19 */
"negative array dimension (%d)", /* 20 */
"redeclaration of formal parameter %s", /* 21 */
"incomplete or misplaced function definition", /* 22 */
"undefined label %s", /* 23 */
"cannot initialize function: %s", /* 24 */
"cannot initialize typedef: %s", /* 25 */
"cannot initialize extern declaration: %s", /* 26 */
"redeclaration of %s", /* 27 */
"redefinition of %s", /* 28 */
"previously declared extern, becomes static: %s", /* 29 */
"redeclaration of %s; ANSI C requires static", /* 30 */
"incomplete structure or union %s: %s", /* 31 */
"argument type defaults to 'int': %s", /* 32 */
"duplicate member name: %s", /* 33 */
"nonportable bit-field type", /* 34 */
"illegal bit-field type", /* 35 */
"illegal bit-field size", /* 36 */
"zero size bit-field", /* 37 */
"function illegal in structure or union", /* 38 */
"zero sized array in struct is a C99 extension: %s", /* 39 */
"unknown size: %s", /* 40 */
"illegal use of bit-field", /* 41 */
"forward reference to enum type", /* 42 */
"redefinition hides earlier one: %s", /* 43 */
"declaration introduces new type in ANSI C: %s %s", /* 44 */
"base type is really '%s %s'", /* 45 */
"(%s) tag redeclared", /* 46 */
"zero sized %s is a C9X feature", /* 47 */
"overflow in enumeration values: %s", /* 48 */
"struct or union member must be named", /* 49 */
"a function is declared as an argument: %s", /* 50 */
"parameter mismatch: %d declared, %d defined", /* 51 */
"cannot initialize parameter: %s", /* 52 */
"declared argument %s is missing", /* 53 */
"trailing ',' prohibited in enum declaration", /* 54 */
"integral constant expression expected", /* 55 */
"integral constant too large", /* 56 */
"enumeration constant hides parameter: %s", /* 57 */
"type does not match prototype: %s", /* 58 */
"formal parameter lacks name: param #%d", /* 59 */
"void must be sole parameter", /* 60 */
"void parameter cannot have name: %s", /* 61 */
"function prototype parameters must have types", /* 62 */
"prototype does not match old-style definition", /* 63 */
"()-less function definition", /* 64 */
"%s has no named members", /* 65 */
"syntax requires ';' after last struct/union member", /* 66 */
"cannot return incomplete type", /* 67 */
"typedef already qualified with '%s'", /* 68 */
"inappropriate qualifiers with 'void'", /* 69 */
"%soperand of '%s' is unsigned in ANSI C", /* 70 */
"too many characters in character constant", /* 71 */
"typedef declares no type name", /* 72 */
"empty character constant", /* 73 */
"no hex digits follow \\x", /* 74 */
"overflow in hex escape", /* 75 */
"character escape does not fit in character", /* 76 */
"bad octal digit %c", /* 77 */
"nonportable character escape", /* 78 */
"dubious escape \\%c", /* 79 */
"dubious escape \\%o", /* 80 */
"\\a undefined in traditional C", /* 81 */
"\\x undefined in traditional C", /* 82 */
"storage class after type is obsolescent", /* 83 */
"ANSI C requires formal parameter before '...'", /* 84 */
"dubious tag declaration: %s %s", /* 85 */
"automatic hides external declaration: %s", /* 86 */
"static hides external declaration: %s", /* 87 */
"typedef hides external declaration: %s", /* 88 */
"typedef redeclared: %s", /* 89 */
"inconsistent redeclaration of extern: %s", /* 90 */
"declaration hides parameter: %s", /* 91 */
"inconsistent redeclaration of static: %s", /* 92 */
"dubious static function at block level: %s", /* 93 */
"function has illegal storage class: %s", /* 94 */
"declaration hides earlier one: %s", /* 95 */
"cannot dereference non-pointer type", /* 96 */
"suffix U is illegal in traditional C", /* 97 */
"suffixes F and L are illegal in traditional C", /* 98 */
"%s undefined", /* 99 */
"unary + is illegal in traditional C", /* 100 */
"undefined struct/union member: %s", /* 101 */
"illegal member use: %s", /* 102 */
"left operand of '.' must be struct/union object", /* 103 */
"left operand of '->' must be pointer to struct/union", /* 104 */
"non-unique member requires struct/union %s", /* 105 */
"left operand of '->' must be pointer", /* 106 */
"operands of '%s' have incompatible types", /* 107 */
"operand of '%s' has incompatible type", /* 108 */
"void type illegal in expression", /* 109 */
"pointer to function is not allowed here", /* 110 */
"unacceptable operand of '%s'", /* 111 */
"cannot take address of bit-field", /* 112 */
"cannot take address of register %s", /* 113 */
"%soperand of '%s' must be lvalue", /* 114 */
"%soperand of '%s' must be modifiable lvalue", /* 115 */
"illegal pointer subtraction", /* 116 */
"bitwise operation on signed value possibly nonportable", /* 117 */
"semantics of '%s' change in ANSI C; use explicit cast", /* 118 */
"conversion of '%s' to '%s' is out of range", /* 119 */
"bitwise operation on signed value nonportable", /* 120 */
"negative shift", /* 121 */
"shift greater than size of object", /* 122 */
"illegal combination of pointer and integer, op %s", /* 123 */
"illegal pointer combination, op %s", /* 124 */
"ANSI C forbids ordered comparisons of pointers to functions",/* 125 */
"incompatible types in conditional", /* 126 */
"'&' before array or function: ignored", /* 127 */
"operands have incompatible pointer types, op %s", /* 128 */
"expression has null effect", /* 129 */
"enum type mismatch, op %s", /* 130 */
"conversion to '%s' may sign-extend incorrectly", /* 131 */
"conversion from '%s' to '%s' may lose accuracy", /* 132 */
"conversion of pointer to '%s' loses bits", /* 133 */
"conversion of pointer to '%s' may lose bits", /* 134 */
"possible pointer alignment problem", /* 135 */
"cannot do pointer arithmetic on operand of unknown size", /* 136 */
"use of incomplete enum type, op %s", /* 137 */
"unknown operand size, op %s", /* 138 */
"division by 0", /* 139 */
"modulus by 0", /* 140 */
"integer overflow detected, op %s", /* 141 */
"floating point overflow detected, op %s", /* 142 */
"cannot take size of incomplete type", /* 143 */
"cannot take size of function", /* 144 */
"cannot take size of bit-field", /* 145 */
"cannot take size of void", /* 146 */
"invalid cast expression", /* 147 */
"improper cast of void expression", /* 148 */
"illegal function", /* 149 */
"argument mismatch: %d arg%s passed, %d expected", /* 150 */
"void expressions may not be arguments, arg #%d", /* 151 */
"argument cannot have unknown size, arg #%d", /* 152 */
"argument has incompatible pointer type, arg #%d", /* 153 */
"illegal combination of pointer and integer, arg #%d", /* 154 */
"argument is incompatible with prototype, arg #%d", /* 155 */
"enum type mismatch, arg #%d", /* 156 */
"ANSI C treats constant as unsigned", /* 157 */
"%s may be used before set", /* 158 */
"assignment in conditional context", /* 159 */
"operator '==' found where '=' was expected", /* 160 */
"constant in conditional context", /* 161 */
"comparison of %s with %s, op %s", /* 162 */
"a cast does not yield an lvalue", /* 163 */
"assignment of negative constant to unsigned type", /* 164 */
"constant truncated by assignment", /* 165 */
"precision lost in bit-field assignment", /* 166 */
"array subscript cannot be negative: %ld", /* 167 */
"array subscript cannot be > %d: %ld", /* 168 */
"precedence confusion possible: parenthesize!", /* 169 */
"first operand must have scalar type, op ? :", /* 170 */
"assignment type mismatch", /* 171 */
"too many struct/union initializers", /* 172 */
"too many array initializers", /* 173 */
"too many initializers", /* 174 */
"initialisation of an incomplete type", /* 175 */
"invalid initializer type %s", /* 176 */
"non-constant initializer", /* 177 */
"initializer does not fit", /* 178 */
"cannot initialize struct/union with no named member", /* 179 */
"bit-field initializer does not fit", /* 180 */
"{}-enclosed initializer required", /* 181 */
"incompatible pointer types", /* 182 */
"illegal combination of pointer and integer", /* 183 */
"illegal pointer combination", /* 184 */
"initialisation type mismatch", /* 185 */
"bit-field initialisation is illegal in traditional C", /* 186 */
"non-null byte ignored in string initializer", /* 187 */
"no automatic aggregate initialization in traditional C", /* 188 */
"assignment of struct/union illegal in traditional C", /* 189 */
"empty array declaration: %s", /* 190 */
"%s set but not used in function %s", /* 191 */
"%s unused in function %s", /* 192 */
"statement not reached", /* 193 */
"label %s redefined", /* 194 */
"case not in switch", /* 195 */
"case label affected by conversion", /* 196 */
"non-constant case expression", /* 197 */
"non-integral case expression", /* 198 */
"duplicate case in switch: %ld", /* 199 */
"duplicate case in switch: %lu", /* 200 */
"default outside switch", /* 201 */
"duplicate default in switch", /* 202 */
"case label must be of type `int' in traditional C", /* 203 */
"controlling expressions must have scalar type", /* 204 */
"switch expression must have integral type", /* 205 */
"enumeration value(s) not handled in switch", /* 206 */
"loop not entered at top", /* 207 */
"break outside loop or switch", /* 208 */
"continue outside loop", /* 209 */
"enum type mismatch in initialisation", /* 210 */
"return value type mismatch", /* 211 */
"cannot return incomplete type", /* 212 */
"void function %s cannot return value", /* 213 */
"function %s expects to return value", /* 214 */
"function implicitly declared to return int", /* 215 */
"function %s has return (e); and return;", /* 216 */
"function %s falls off bottom without returning value", /* 217 */
"ANSI C treats constant as unsigned, op %s", /* 218 */
"concatenated strings are illegal in traditional C", /* 219 */
"fallthrough on case statement", /* 220 */
"initialisation of unsigned with negative constant", /* 221 */
"conversion of negative constant to unsigned type", /* 222 */
"end-of-loop code not reached", /* 223 */
"cannot recover from previous errors", /* 224 */
"static function called but not defined: %s()", /* 225 */
"static variable %s unused", /* 226 */
"const object %s should have initializer", /* 227 */
"function cannot return const or volatile object", /* 228 */
"questionable conversion of function pointer", /* 229 */
"nonportable character comparison, op %s", /* 230 */
"argument %s unused in function %s", /* 231 */
"label %s unused in function %s", /* 232 */
"struct %s never defined", /* 233 */
"union %s never defined", /* 234 */
"enum %s never defined", /* 235 */
"static function %s unused", /* 236 */
"redeclaration of formal parameter %s", /* 237 */
"initialisation of union is illegal in traditional C", /* 238 */
"constant argument to NOT", /* 239 */
"assignment of different structures", /* 240 */
"dubious operation on enum, op %s", /* 241 */
"combination of '%s' and '%s', op %s", /* 242 */
"dubious comparison of enums, op %s", /* 243 */
"illegal structure pointer combination", /* 244 */
"illegal structure pointer combination, op %s", /* 245 */
"dubious conversion of enum to '%s'", /* 246 */
"pointer casts may be troublesome", /* 247 */
"floating-point constant out of range", /* 248 */
"syntax error", /* 249 */
"unknown character \\%o", /* 250 */
"malformed integer constant", /* 251 */
"integer constant out of range", /* 252 */
"unterminated character constant", /* 253 */
"newline in string or char constant", /* 254 */
"undefined or invalid # directive", /* 255 */
"unterminated comment", /* 256 */
"extra characters in lint comment", /* 257 */
"unterminated string constant", /* 258 */
"conversion to '%s' due to prototype, arg #%d", /* 259 */
"previous declaration of %s", /* 260 */
"previous definition of %s", /* 261 */
"\\\" inside character constants undefined in traditional C", /* 262 */
"\\? undefined in traditional C", /* 263 */
"\\v undefined in traditional C", /* 264 */
"%s C does not support 'long long'", /* 265 */
"'long double' is illegal in traditional C", /* 266 */
"shift equal to size of object", /* 267 */
"variable declared inline: %s", /* 268 */
"argument declared inline: %s", /* 269 */
"function prototypes are illegal in traditional C", /* 270 */
"switch expression must be of type `int' in traditional C", /* 271 */
"empty translation unit", /* 272 */
"bit-field type '%s' invalid in ANSI C", /* 273 */
"ANSI C forbids comparison of %s with %s", /* 274 */
"cast discards 'const' from pointer target type", /* 275 */
"", /* 276 */
"initialisation of '%s' with '%s'", /* 277 */
"combination of '%s' and '%s', arg #%d", /* 278 */
"combination of '%s' and '%s' in return", /* 279 */
"must be outside function: /* %s */", /* 280 */
"duplicate use of /* %s */", /* 281 */
"must precede function definition: /* %s */", /* 282 */
"argument number mismatch with directive: /* %s */", /* 283 */
"fallthrough on default statement", /* 284 */
"prototype declaration", /* 285 */
"function definition is not a prototype", /* 286 */
"function declaration is not a prototype", /* 287 */
"dubious use of /* VARARGS */ with /* %s */", /* 288 */
"can't be used together: /* PRINTFLIKE */ /* SCANFLIKE */", /* 289 */
"static function %s declared but not defined", /* 290 */
"invalid multibyte character", /* 291 */
"cannot concatenate wide and regular string literals", /* 292 */
"argument %d must be 'char *' for PRINTFLIKE/SCANFLIKE", /* 293 */
"multi-character character constant", /* 294 */
"conversion of '%s' to '%s' is out of range, arg #%d", /* 295 */
"conversion of negative constant to unsigned type, arg #%d", /* 296 */
"conversion to '%s' may sign-extend incorrectly, arg #%d", /* 297 */
"conversion from '%s' to '%s' may lose accuracy, arg #%d", /* 298 */
"prototype does not match old style definition, arg #%d", /* 299 */
"old style definition", /* 300 */
"array of incomplete type", /* 301 */
"%s returns pointer to automatic object", /* 302 */
"ANSI C forbids conversion of %s to %s", /* 303 */
"ANSI C forbids conversion of %s to %s, arg #%d", /* 304 */
"ANSI C forbids conversion of %s to %s, op %s", /* 305 */
"constant truncated by conversion, op %s", /* 306 */
"static variable %s set but not used", /* 307 */
"", /* 308 */
"extra bits set to 0 in conversion of '%s' to '%s', op %s", /* 309 */
"symbol renaming can't be used on function arguments", /* 310 */
"symbol renaming can't be used on automatic variables", /* 311 */
"%s C does not support // comments", /* 312 */
"struct or union member name in initializer is a C9X feature",/* 313 */
"%s is not a structure or a union", /* 314 */
"GCC style struct or union member name in initializer", /* 315 */
"__FUNCTION__ is a GCC extension", /* 316 */
"__func__ is a C9X feature", /* 317 */
"variable array dimension is a C99/GCC extension", /* 318 */
"compound literals are a C9X/GCC extension", /* 319 */
"({ }) is a GCC extension", /* 320 */
"array initializer with designators is a C9X feature", /* 321 */
"zero sized array is a C99 extension", /* 322 */
};
/*
* print a list of the messages with their ids
*/
void
msglist(void)
{
size_t i;
for (i = 0; i < sizeof(msgs) / sizeof(msgs[0]); i++)
printf("%zu\t%s\n", i, msgs[i]);
}
/*
* If Fflag is not set lbasename() returns a pointer to the last
* component of the path, otherwise it returns the argument.
*/
static const char *
lbasename(const char *path)
{
const char *cp, *cp1, *cp2;
if (Fflag)
return (path);
cp = cp1 = cp2 = path;
while (*cp != '\0') {
if (*cp++ == '/') {
cp2 = cp1;
cp1 = cp;
}
}
return (*cp1 == '\0' ? cp2 : cp1);
}
static void
verror( int n, va_list ap)
{
const char *fn;
if (ERR_ISSET(n, &msgset))
return;
fn = lbasename(curr_pos.p_file);
(void)printf("%s(%d): ", fn, curr_pos.p_line);
(void)vprintf(msgs[n], ap);
(void)printf(" [%d]\n", n);
nerr++;
}
static void
vwarning( int n, va_list ap)
{
const char *fn;
if (ERR_ISSET(n, &msgset))
return;
if (nowarn)
/* this warning is suppressed by a LINTED comment */
return;
fn = lbasename(curr_pos.p_file);
(void)printf("%s(%d): warning: ", fn, curr_pos.p_line);
(void)vprintf(msgs[n], ap);
(void)printf(" [%d]\n", n);
if (wflag)
nerr++;
}
void
error(int n, ...)
{
va_list ap;
va_start(ap, n);
verror(n, ap);
va_end(ap);
}
void
lerror(const char *file, int line, const char *msg, ...)
{
va_list ap;
const char *fn;
va_start(ap, msg);
fn = lbasename(curr_pos.p_file);
(void)fprintf(stderr, "%s(%d): lint error: %s, %d", fn, curr_pos.p_line,
file, line);
(void)vfprintf(stderr, msg, ap);
(void)fprintf(stderr, "\n");
va_end(ap);
exit(1);
}
void
warning(int n, ...)
{
va_list ap;
va_start(ap, n);
vwarning(n, ap);
va_end(ap);
}
void
message(int n, ...)
{
va_list ap;
const char *fn;
if (ERR_ISSET(n, &msgset))
return;
va_start(ap, n);
fn = lbasename(curr_pos.p_file);
(void)printf("%s(%d): ", fn, curr_pos.p_line);
(void)vprintf(msgs[n], ap);
(void)printf(" [%d]\n", n);
va_end(ap);
}
/*
* XXX I think the logic is possibly somewhat screwed up here. The
* question is, how do we want to interpret the -s and -S flags going
* forward? We need to answer that and then we can fix this to be
* "right"... [perry, 2 Nov 2002]
*/
int
c99ism(int n, ...)
{
va_list ap;
int msg;
va_start(ap, n);
if (sflag && !(Sflag || gflag)) {
verror(n, ap);
msg = 1;
} else if (!sflag && (Sflag || gflag)) {
msg = 0;
} else {
vwarning(n, ap);
msg = 1;
}
va_end(ap);
return (msg);
}
int
gnuism(int n, ...)
{
va_list ap;
int msg;
va_start(ap, n);
if (sflag && !gflag) {
verror(n, ap);
msg = 1;
} else if (!sflag && gflag) {
msg = 0;
} else {
vwarning(n, ap);
msg = 1;
}
va_end(ap);
return (msg);
}
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