reactos/lib/freetype/rosglue.c

   1 /* $Id: rosglue.c,v 1.2 2003/04/01 17:14:36 gvg Exp $
   2  *
   3  * COPYRIGHT:         See COPYING in the top level directory
   4  * PROJECT:           FreeType implementation for ReactOS
   5  * PURPOSE:           Glue functions between FreeType
   6  * FILE:              thirdparty/freetype/rosglue.c
   7  * PROGRAMMER:        Ge van Geldorp (ge@gse.nl)
   8  * NOTES:
   9  */
  10
  11 #include <ddk/ntddk.h>
  12 #include <ctype.h>
  13 #include <errno.h>
  14 #include <setjmp.h>
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18
  19 #define NDEBUG
  20 #include <debug.h>
  21
  22 #define TAG_FREETYPE  TAG('F', 'T', 'Y', 'P')
  23
  24 /*
  25  * First some generic routines
  26  */
  27
  28 void *
  29 memcpy(void *Dest, const void *Source, size_t Size)
  30 {
  31   RtlMoveMemory(Dest, Source, Size);
  32
  33   return Dest;
  34 }
  35
  36
  37 int
  38 memcmp(const void *p1, const void *p2, size_t Size)
  39 {
  40    unsigned int i;
  41    const char* s1;
  42    const char* s2;
  43
  44    s1 = (const char *) p1;
  45    s2 = (const char *) p2;
  46    for (i = 0; i < Size; i++)
  47      {
  48         if ((*s1) != (*s2))
  49           {
  50              return((*s1) - (*s2));
  51           }
  52         s1++;
  53         s2++;
  54      }
  55    return(0);
  56 }
  57
  58 /* Hopefully we're only passed ASCII characters.... */
  59 int
  60 isalnum(int c)
  61 {
  62   assert(0x20 <= c && c <= 0x7f);
  63
  64   return (('0' <= c && c <= '9') || ('a' <= c && c <= 'z') || ('A' <= c && c <= 'Z'));
  65 }
  66
  67 long
  68 labs(long j)
  69 {
  70   return (j < 0 ? -j : j);
  71 }
  72
  73 /*
  74  * Memory allocation
  75  *
  76  * Because of realloc, we need to keep track of the size of the allocated
  77  * buffer (need to copy the old contents to the new buffer). So, allocate
  78  * extra space for a size_t, store the allocated size in there and return
  79  * the address just past it as the allocated buffer.
  80  */
  81
  82 void *
  83 malloc(size_t Size)
  84 {
  85   void *Object;
  86
  87   Object = ExAllocatePoolWithTag(NonPagedPool, sizeof(size_t) + Size, TAG_FREETYPE);
  88   if (NULL != Object)
  89     {
  90     *((size_t *) Object) = Size;
  91     Object = (void *)((size_t *) Object + 1);
  92     }
  93
  94   return Object;
  95 }
  96
  97 void *
  98 realloc(void *Object, size_t Size)
  99 {
 100   void *NewObject;
 101   size_t CopySize;
 102
 103   NewObject = ExAllocatePoolWithTag(NonPagedPool, sizeof(size_t) + Size, TAG_FREETYPE);
 104   if (NULL != NewObject)
 105     {
 106     *((size_t *) NewObject) = Size;
 107     NewObject = (void *)((size_t *) NewObject + 1);
 108     CopySize = *((size_t *) Object - 1);
 109     if (Size < CopySize)
 110       {
 111       CopySize = Size;
 112       }
 113     memcpy(NewObject, Object, CopySize);
 114     ExFreePool((size_t *) Object - 1);
 115     }
 116
 117   return NewObject;
 118 }
 119
 120 void
 121 free(void *Object)
 122 {
 123   ExFreePool((size_t *) Object - 1);
 124 }
 125
 126 /*
 127  * File I/O
 128  *
 129  * This is easy, we don't want FreeType to do any I/O. So return an
 130  * error on each I/O attempt. Note that errno is not being set, it is
 131  * not used by FreeType.
 132  */
 133
 134 FILE *
 135 fopen(const char *FileName, const char *Mode)
 136 {
 137   DPRINT1("Freetype tries to open file %s\n", FileName);
 138
 139   return NULL;
 140 }
 141
 142 int
 143 fseek(FILE *Stream, long Offset, int Origin)
 144 {
 145   DPRINT1("Doubleplus ungood: freetype shouldn't fseek!\n");
 146
 147   return -1;
 148 }
 149
 150 long
 151 ftell(FILE *Stream)
 152 {
 153   DPRINT1("Doubleplus ungood: freetype shouldn't ftell!\n");
 154
 155   return -1;
 156 }
 157
 158 size_t
 159 fread(void *Buffer, size_t Size, size_t Count, FILE *Stream)
 160 {
 161   DPRINT1("Doubleplus ungood: freetype shouldn't fread!\n");
 162
 163   return 0;
 164 }
 165
 166 int
 167 fclose(FILE *Stream)
 168 {
 169   DPRINT1("Doubleplus ungood: freetype shouldn't fclose!\n");
 170
 171   return EOF;
 172 }