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/*
Copyright (C) 1999 J.H.M. Dassen (Ray) <jdassen@wi.LeidenUniv.nl>
Copyright (C) 1999 Antti-Juhani Kaijanaho <gaia@iki.fi>
Copyright (C) 2002 Bjoern Brill <brill@fs.math.uni-frankfurt.de>
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#ifndef UTIL_H
#define UTIL_H
#include <stddef.h>
#ifndef max
#define max(a, b) (((a) > (b)) ? (a) : (b))
#endif
#ifndef min
#define min(a, b) (((a) < (b)) ? (a) : (b))
#endif
#define lengthof(array) (sizeof(array) / sizeof(array[0]))
/* the number of elements in an array (a real one, NOT a pointer) */
extern int msglevel;
extern int suppress_warnings;
extern int num_warnings;
#ifdef __GNUC__
# define FORMAT(x) __attribute__((format x))
#else
# define FORMAT(x) /* nothing */
#endif
void warning(const char * format, ...) FORMAT((printf, 1, 2));
/* print an unsurpressable warning */
void panic(const char * format, ...) FORMAT((printf, 1, 2));
/* print a message, and exit */
#if defined(NDEBUG) && defined(__GNUC__)
/* gcc's cpp has extensions; it allows for macros with a variable number of
* arguments. We use this extension here to preprocess eassert away. */
#define eassert(int expr, format, args...) ((void)0)
#else
void eassert(int expr, const char * format, ...) FORMAT((printf, 2, 3));
/* Like assert(), but with a descriptive message */
#endif
#if defined(NDEBUG) && defined(__GNUC__)
/* gcc's cpp has extensions; it allows for macros with a variable number of
arguments. We use this extension here to preprocess pmesg away. */
#define pmesg(level, format, args...) ((void)0)
#else
void pmesg(int level, const char * format, ...) FORMAT((printf, 2, 3));
/* print a message, if it is considered significant enough.
Adapted from [K&R2], p. 174 */
#endif
extern const char * const util_notreached_format;
#define NOTREACHED panic(util_notreached_format, __FILE__, __LINE__)
extern const char * const util_oom_format;
#define enomem( ) panic(util_oom_format, __FILE__, __LINE__)
/* xmalloc(size) tries to malloc() size bytes of memory and panics with a
* diagnostic message if it didn't get them. There are situations when it is
* convenient to ask for zero bytes of memory (variable length arrays in .tfm
* data which may have length 0). ISO C allows malloc(0) to return NULL, and
* on some systems (e.g. AIX 4.2) it really does, so we must not panic
* in this case.
*
* xmalloc() is implemented as a macro. Memory checkers like to #define
* it themselves, and we don't want to stop them.
*/
#ifndef xmalloc
#define xmalloc(size) util_xmalloc(size, __FILE__, __LINE__)
#endif
extern void * util_xmalloc(size_t size, const char * file, int line);
/* Simulate malloc(0) == NULL behaviour with GNU libc.
* Useful for debugging purposes only.
* Does not work with C libraries different from GNU libc !
*/
#ifdef USE_MALLOC0
extern void use_malloc0(void);
#endif
/* Conver a string in-place to upper case */
void strupcase(char * s);
/* Return a malloc'ed upper-case copy of a string, NULL if out of memory. */
char * strupcasedup(char const * s);
/* Simple shell-style pattern matching. Wildcards are:
* '*': matches any string (including empty string)
* '?': matches any single character
* '#': matches any decimal digit (convenient for TeX font names)
* Returns true if matching, 0 otherwise.
*/
int patmatch(char const * pat, char const * s);
#endif /* UTIL_H */
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