mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Libraries/Steel/c/res

   1 /*
   2  * res
   3  *
   4  * Access to resources
   5  *
   6  * © 1993-1998 Straylight
   7  */
   8
   9 /*----- Licensing note ----------------------------------------------------*
  10  *
  11  * This file is part of Straylight's Steel library.
  12  *
  13  * Steel is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * Steel is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with Steel.  If not, write to the Free Software Foundation,
  25  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 #include <string.h>
  29 #include <stdio.h>
  30 #include "os.h"
  31 #include "swiv.h"
  32 #include "swis.h"
  33 #include "wimpt.h"
  34 #include "res.h"
  35 #include "buffer.h"
  36
  37 static char res__prefix[40];
  38
  39 /*
  40  *
  41  * void res_init(char *progname)
  42  *
  43  * Use
  44  *  Sets up res to use a certain path for resources.  Mainly for
  45  *  compatibility with older applications.
  46  *
  47  * Parameters
  48  *  char *progname == the program name (sets up path as <progname$Dir>)
  49  */
  50
  51 void res_init(char *progname)
  52 {
  53   sprintf(res__prefix,"<%s$Dir>",progname);
  54 }
  55
  56 /*
  57  * void res_setPrefix(char *prefix)
  58  *
  59  * Use
  60  *  Sets up a full prefix for resources.  This means you can keep resources
  61  *  in separate directories.
  62  *
  63  * Parameters
  64  *  char *prefix == the prefix
  65  */
  66
  67 void res_setPrefix(char *prefix)
  68 {
  69   strcpy(res__prefix,prefix);
  70 }
  71
  72 /*
  73  * BOOL res_fileExists(char *name)
  74  *
  75  * Use
  76  *  Informs the caller if a given file exists
  77  *
  78  * Parameters
  79  *  char *name == the name of the file
  80  *
  81  * Returns
  82  *  TRUE if the file really does exist
  83  */
  84
  85 BOOL res_fileExists(char *name)
  86 {
  87   os_filestr f;
  88   f.action=17;
  89   f.name=name;
  90   if (os_file(&f))
  91     return (FALSE);
  92   return (!!f.action);
  93 }
  94
  95 /*
  96  * BOOL res__trySuffix(char *name)
  97  *
  98  * Use
  99  *  Tries to find a file with a possible WIMP-style mode suffix (24,23,22
 100  *  etc.)  If it did, it updates the name in the caller's buffer, and
 101  *  returns TRUE.  Otherwise, the name is preserved, and it returns FALSE.
 102  */
 103
 104 static BOOL res__trySuffix(char *name)
 105 {
 106   char *suff;
 107   char *end;
 108   if (wimpt_getVersion()>=300)
 109   {
 110     end=name+strlen(name);
 111     wimpt_noerr(wimp_readsysinfo(2,(int *)&suff));
 112     strcat(name,suff);
 113     if (res_fileExists(name))
 114       return (TRUE);
 115     *end=0;
 116   }
 117   if (res_fileExists(name))
 118     return (TRUE);
 119   return (FALSE);
 120 }
 121
 122 /*
 123  * char *res__findCountryName(void)
 124  *
 125  * Use
 126  *  Returns the name of the current country.  If the current country is
 127  *  unknown, try the UK.
 128  */
 129
 130 static char *res__findCountryName(void)
 131 {
 132   char *buffer=buffer_find();
 133   int country=_swi(OS_Byte,_inr(0,2)+_return(1),240,0,255);
 134   int len;
 135   if (_swi(OS_ServiceCall,
 136            _inr(1,4)+_out(5)+_return(1),
 137            0x43,2,country,buffer,
 138            &len)==1)
 139     return ("UK");
 140   else
 141   {
 142     buffer[len]=0;
 143     return (buffer);
 144   }
 145 }
 146
 147 /*
 148  * int res_findname(const char *resname,char *buf)
 149  *
 150  * Use
 151  *  Returns a full pathname for the resource file as given in the buffer.
 152  *  This is for compatibility reasons.  If I was writing this fresh, I
 153  *  would return a pointer to an internal static object, but Acorn know
 154  *  best...
 155  *
 156  *  Some new functionality has been added.  It will look for files first in
 157  *  the directory set up using res_init or res_setPrefix, and then in the
 158  *  'Resources' subdirectory.  If neither is present, then the name returned
 159  *  is in the main application directory.
 160  *
 161  *  Also, under RISC OS 3, it will search for files with mode prefixes, so
 162  *  you can use multiple sprite files for different resolutions.  Isn't this
 163  *  fun!
 164  *
 165  * Parameters
 166  *  const char *resname == the leafname of the resource file.
 167  *  char *buf == where to put the result.
 168  *
 169  * Returns
 170  *  TRUE for compatibility with the Acorn version.  What good it does, I
 171  *  don't know.  This is in all a very odd routine indeed.
 172  */
 173
 174 int res_findname(const char *resname,char *buf)
 175 {
 176   sprintf(buf,"%s.Resources.%s",res__prefix,resname);
 177   if (res__trySuffix(buf))
 178     return (TRUE);
 179   sprintf(buf,
 180           "%s.Resources.%s.%s",
 181           res__prefix,
 182           res__findCountryName(),
 183           resname);
 184   if (res__trySuffix(buf))
 185     return (TRUE);
 186   sprintf(buf,
 187           "%s.Resources.UK.%s",
 188           res__prefix,
 189           resname);
 190   if (res__trySuffix(buf))
 191     return (TRUE);
 192   sprintf(buf,"%s.%s",res__prefix,resname);
 193   if (res__trySuffix(buf))
 194     return (TRUE);
 195   sprintf(buf,"%s.%s",res__prefix,resname);
 196   return (TRUE);
 197 }
 198
 199 /*
 200  * char *res_name(const char *resname)
 201  *
 202  * Use
 203  *  Translates the name given as for res_findname and returns a pointer to
 204  *  the translated string
 205  */
 206
 207 char *res_name(const char *resname)
 208 {
 209   char *buffer=buffer_find();
 210   res_findname(resname,buffer);
 211   return (buffer);
 212 }
 213
 214 /*
 215  * FILE *res_openfile(const char *resname,const char *mode)
 216  *
 217  * Use
 218  *  Opens a resource file in a given ANSI mode.  It does this without the
 219  *  odd adding on of numbers to the end that the Acorn one does (I hope!)
 220  *
 221  * Parameters
 222  *  const char *resname == leafname of file to open
 223  *  const char *mode == pointer to ANSI mode string
 224  *
 225  * Returns
 226  *  A standard ANSI-type FILE pointer.
 227  */
 228
 229 FILE *res_openfile(const char *resname,const char *mode)
 230 {
 231   return (fopen(res_name(resname),mode));
 232 }