src/vg/vg_io.h

   1 /* Copyright (C) 2021-2022 Harry Godden (hgn) - All Rights Reserved */
   2
   3 #ifndef VG_IO_H
   4 #define VG_IO_H
   5
   6 #include "vg_stdint.h"
   7 #include "vg_platform.h"
   8 #include <stdio.h>
   9
  10 /*
  11  * FIle I/O
  12  */
  13 static i64 vg_file_size( FILE *fileptr )
  14 {
  15         fseek( fileptr, 0, SEEK_END );
  16         i64 fsize = ftell( fileptr );
  17         fseek( fileptr, 0, SEEK_SET );
  18
  19         return fsize;
  20 }
  21
  22 static void *vg_disk_open_read( const char *path, int reserve_end, i64 *size )
  23 {
  24         FILE *f = fopen( path, "rb" );
  25         if( f )
  26         {
  27                 i64 fsize = vg_file_size( f );
  28                 void *buf = vg_alloc( fsize + reserve_end );
  29
  30       /* Invalid / corrupt read */
  31       if( fread( buf, 1, fsize, f ) != fsize )
  32       {
  33          vg_free( buf );
  34          buf = NULL;
  35       }
  36
  37                 *size = fsize;
  38
  39                 fclose( f );
  40                 return buf;
  41         }
  42         else
  43         {
  44                 return NULL;
  45         }
  46 }
  47
  48 static char *vg_disk_load_text( const char *path, i64 *size )
  49 {
  50         char *buf;
  51         i64 fsize;
  52
  53         if( (buf = (char *)vg_disk_open_read( path, 1, &fsize )) )
  54         {
  55                 buf[ fsize ] = 0x00;
  56                 *size = fsize +1;
  57
  58                 return buf;
  59         }
  60
  61         return NULL;
  62 }
  63
  64 static void *vg_asset_read_s( const char *path, i64 *size )
  65 {
  66         return vg_disk_open_read( path, 0, size );
  67 }
  68
  69 static void *vg_asset_read( const char *path )
  70 {
  71         i64 size;
  72         return vg_disk_open_read( path, 0, &size );
  73 }
  74
  75 static char *vg_textasset_read_s( const char *path, i64 *size )
  76 {
  77         return vg_disk_load_text( path, size );
  78 }
  79
  80 static char *vg_textasset_read( const char *name )
  81 {
  82         i64 size;
  83         return vg_disk_load_text( name, &size );
  84 }
  85
  86 static int vg_asset_write( const char *path, void *data, i64 size )
  87 {
  88         FILE *f = fopen( path, "wb" );
  89         if( f )
  90         {
  91                 fwrite( data, size, 1, f );
  92                 fclose( f );
  93                 return 1;
  94         }
  95         else
  96         {
  97                 return 0;
  98         }
  99 }
 100
 101 #endif /* VG_IO_H */