diff options
Diffstat (limited to 'utils.c')
| -rw-r--r-- | utils.c | 164 |
1 files changed, 164 insertions, 0 deletions
@@ -0,0 +1,164 @@ +/* Generic support functions for Xcftools + * + * Copyright (C) 2006 Henning Makholm + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of version 2 of the GNU General Public License as + * published by the Free Software Foundation. + * + * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA + */ + +#include "xcftools.h" +#include <string.h> +#include <stdarg.h> +#include <stdlib.h> +#include <errno.h> + +const char *progname = "$0" ; +int verboseFlag = 0 ; + + +static void __ATTRIBUTE__((noreturn)) +vFatalGeneric(int status,const char *format,va_list args) +{ + if( format ) { + if( *format == '!' ) { + vfprintf(stderr,format+1,args); + fprintf(stderr,": %s\n",strerror(errno)); + } else { + vfprintf(stderr,format,args); + fputc('\n',stderr); + } + } + exit(status); +} + +void +FatalGeneric(int status,const char* format,...) +{ + va_list v; va_start(v,format); + fprintf(stderr,"%s: ",progname); + vFatalGeneric(status,format,v); +} + +void +FatalUnexpected(const char* format,...) +{ + va_list v; va_start(v,format); + fprintf(stderr,"%s: ",progname); + vFatalGeneric(127,format,v) ; +} + +void +FatalBadXCF(const char* format,...) +{ + va_list v; va_start(v,format); + fprintf(stderr,"%s: %s:\n ",progname,_("Corrupted or malformed XCF file")); + vFatalGeneric(125,format,v) ; +} + +void +xcfCheckspace(uint32_t addr,int spaceafter,const char *format,...) +{ + if( xcf_length < spaceafter || addr > xcf_length - spaceafter ) { + va_list v; va_start(v,format); + fprintf(stderr,"%s: %s\n ",progname,_("Corrupted or truncated XCF file")); + fprintf(stderr,"(%" PRIXPTR " bytes): ",(uintptr_t)xcf_length); + vFatalGeneric(125,format,v) ; + } +} + + +void +FatalUnsupportedXCF(const char* format,...) +{ + va_list v; va_start(v,format); + fprintf(stderr,"%s: %s\n ",progname, + _("The image contains features not understood by this program:")); + vFatalGeneric(123,format,v) ; +} + +void +gpl_blurb(void) +{ + fprintf(stderr,PACKAGE_STRING "\n"); + fprintf(stderr, + _("This program is free software; you can modify and distribute it\n" + "under the terms of the GNU General Public License, version 2.\n" + "There is no warranty for %s.\n\n"), + PACKAGE_NAME); + fprintf(stderr, + _("Type \"%s -h\" to get an option summary.\n"),progname); + exit(1) ; +} + +/* ******************************************************* */ + +void * +xcfmalloc(size_t size) +{ + void *ptr = malloc(size); + if( !ptr ) + FatalUnexpected(_("Out of memory")); + return ptr ; +} + +void +xcffree(void *block) +{ + if( xcf_file && + (uint8_t*)block >= xcf_file && + (uint8_t*)block < xcf_file + xcf_length ) + ; + else + free(block); +} + +/* ******************************************************* */ + +FILE * +openout(const char *name) +{ + FILE *newfile ; + if( strcmp(name,"-") == 0 ) + return stdout ; + newfile = fopen(name,"wb") ; + if( newfile == NULL ) + FatalUnexpected(_("!Cannot create file %s"),name); + return newfile ; +} + +void +closeout(FILE *f,const char *name) +{ + if( f == NULL ) + return ; + if( fflush(f) == 0 ) { + errno = 0 ; + if( !ferror(f) ) { + if( fclose(f) == 0 ) + return ; + } else if( errno == 0 ) { + /* Attempt to coax a valid errno out of the standard library, + * following an idea by Bruno Haible + * http://lists.gnu.org/archive/html/bug-gnulib/2003-09/msg00157.html + */ + if( fputc('\0', f) != EOF && + fflush(f) == 0 ) + errno = EIO ; /* Argh, everything succeds. Just call it an I/O error */ + } + } + FatalUnexpected(_("!Error writing file %s"),name); +} + + + + |