utils.c

/*
 * Utility routines
 *
 * Copyright 1998,2000 Bertho A. Stultiens
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "config.h"
#include "wine/port.h"

#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <assert.h>
#include <ctype.h>

#include "wmctypes.h"
#include "utils.h"
#include "wmc.h"

#define SUPPRESS_YACC_ERROR_MESSAGE

static void generic_msg(const char *s, const char *t, va_list ap)
{
	fprintf(stderr, "%s:%d:%d: %s: ", input_name ? input_name : "stdin", line_number, char_number, t);
	vfprintf(stderr, s, ap);
}

/*
 * The yyerror routine should not exit because we use the error-token
 * to determine the syntactic error in the source. However, YACC
 * uses the same routine to print an error just before the error
 * token is reduced.
 * The extra routine 'xyyerror' is used to exit after giving a real
 * message.
 */
int mcy_error(const char *s, ...)
{
#ifndef SUPPRESS_YACC_ERROR_MESSAGE
	va_list ap;
	va_start(ap, s);
	generic_msg(s, "Yacc error", ap);
	va_end(ap);
#endif
	return 1;
}

int xyyerror(const char *s, ...)
{
	va_list ap;
	va_start(ap, s);
	generic_msg(s, "Error", ap);
	va_end(ap);
	exit(1);
	return 1;
}

int mcy_warning(const char *s, ...)
{
	va_list ap;
	va_start(ap, s);
	generic_msg(s, "Warning", ap);
	va_end(ap);
	return 0;
}

void internal_error(const char *file, int line, const char *s, ...)
{
	va_list ap;
	va_start(ap, s);
	fprintf(stderr, "Internal error (please report) %s %d: ", file, line);
	vfprintf(stderr, s, ap);
	va_end(ap);
	exit(3);
}

void error(const char *s, ...)
{
	va_list ap;
	va_start(ap, s);
	fprintf(stderr, "Error: ");
	vfprintf(stderr, s, ap);
	va_end(ap);
	exit(2);
}

void warning(const char *s, ...)
{
	va_list ap;
	va_start(ap, s);
	fprintf(stderr, "Warning: ");
	vfprintf(stderr, s, ap);
	va_end(ap);
}

char *dup_basename(const char *name, const char *ext)
{
	int namelen;
	int extlen = strlen(ext);
	char *base;
	char *slash;

	if(!name)
		name = "wmc.tab";

	slash = strrchr(name, '/');
	if (slash)
		name = slash + 1;

	namelen = strlen(name);

	/* +4 for later extension and +1 for '\0' */
	base = xmalloc(namelen +4 +1);
	strcpy(base, name);
	if(!strcasecmp(name + namelen-extlen, ext))
	{
		base[namelen - extlen] = '\0';
	}
	return base;
}

void *xmalloc(size_t size)
{
    void *res;

    assert(size > 0);
    res = malloc(size);
    if(res == NULL)
    {
	error("Virtual memory exhausted.\n");
    }
    memset(res, 0x55, size);
    return res;
}


void *xrealloc(void *p, size_t size)
{
    void *res;

    assert(size > 0);
    res = realloc(p, size);
    if(res == NULL)
    {
	error("Virtual memory exhausted.\n");
    }
    return res;
}

char *xstrdup(const char *str)
{
	char *s;

	assert(str != NULL);
	s = xmalloc(strlen(str)+1);
	return strcpy(s, str);
}

char *strmake( const char* fmt, ... )
{
    int n;
    size_t size = 100;
    va_list ap;

    for (;;)
    {
        char *p = xmalloc( size );
        va_start( ap, fmt );
        n = vsnprintf( p, size, fmt, ap );
        va_end( ap );
        if (n == -1) size *= 2;
        else if ((size_t)n >= size) size = n + 1;
        else return p;
        free( p );
    }
}

int unistrlen(const WCHAR *s)
{
	int n;
	for(n = 0; *s; n++, s++)
		;
	return n;
}

WCHAR *unistrcpy(WCHAR *dst, const WCHAR *src)
{
	WCHAR *t = dst;
	while(*src)
		*t++ = *src++;
	*t = 0;
	return dst;
}

WCHAR *xunistrdup(const WCHAR * str)
{
	WCHAR *s;

	assert(str != NULL);
	s = xmalloc((unistrlen(str)+1) * sizeof(WCHAR));
	return unistrcpy(s, str);
}

int unistricmp(const WCHAR *s1, const WCHAR *s2)
{
	int i;
	int once = 0;
	static const char warn[] = "Don't know the uppercase equivalent of non ascii characters;"
	       		     "comparison might yield wrong results";
	while(*s1 && *s2)
	{
		if((*s1 & 0xffff) > 0x7f || (*s2 & 0xffff) > 0x7f)
		{
			if(!once)
			{
				once++;
				mcy_warning(warn);
			}
			i = *s1++ - *s2++;
		}
		else
			i = toupper(*s1++) - toupper(*s2++);
		if(i)
			return i;
	}

	if((*s1 & 0xffff) > 0x7f || (*s2 & 0xffff) > 0x7f)
	{
		if(!once)
			mcy_warning(warn);
		return *s1 - *s2;
	}
	else
		return 	toupper(*s1) - toupper(*s2);
}

int unistrcmp(const WCHAR *s1, const WCHAR *s2)
{
	int i;
	while(*s1 && *s2)
	{
		i = *s1++ - *s2++;
		if(i)
			return i;
	}

	return *s1 - *s2;
}

/*******************************************************************
 *         buffer management
 *
 * Function for writing to a memory buffer.
 */

int byte_swapped = 0;
unsigned char *output_buffer;
size_t output_buffer_pos;
size_t output_buffer_size;

static void check_output_buffer_space( size_t size )
{
    if (output_buffer_pos + size >= output_buffer_size)
    {
        output_buffer_size = max( output_buffer_size * 2, output_buffer_pos + size );
        output_buffer = xrealloc( output_buffer, output_buffer_size );
    }
}

void init_output_buffer(void)
{
    output_buffer_size = 1024;
    output_buffer_pos = 0;
    output_buffer = xmalloc( output_buffer_size );
}

void flush_output_buffer( const char *name )
{
    int fd = open( name, O_WRONLY | O_CREAT | O_TRUNC | O_BINARY, 0666 );
    if (fd == -1) error( "Error creating %s\n", name );
    if (write( fd, output_buffer, output_buffer_pos ) != output_buffer_pos)
        error( "Error writing to %s\n", name );
    close( fd );
    free( output_buffer );
}

void put_data( const void *data, size_t size )
{
    check_output_buffer_space( size );
    memcpy( output_buffer + output_buffer_pos, data, size );
    output_buffer_pos += size;
}

void put_byte( unsigned char val )
{
    check_output_buffer_space( 1 );
    output_buffer[output_buffer_pos++] = val;
}

void put_word( unsigned short val )
{
    if (byte_swapped) val = (val << 8) | (val >> 8);
    put_data( &val, sizeof(val) );
}

void put_dword( unsigned int val )
{
    if (byte_swapped)
        val = ((val << 24) | ((val << 8) & 0x00ff0000) | ((val >> 8) & 0x0000ff00) | (val >> 24));
    put_data( &val, sizeof(val) );
}

void align_output( unsigned int align )
{
    size_t size = align - (output_buffer_pos % align);

    if (size == align) return;
    check_output_buffer_space( size );
    memset( output_buffer + output_buffer_pos, 0, size );
    output_buffer_pos += size;
}