1 /*****************************************************************************/
5 /* File I/O for the od65 object file dump utility */
9 /* (C) 1998-2000 Ullrich von Bassewitz */
11 /* D-70597 Stuttgart */
12 /* EMail: uz@musoftware.de */
15 /* This software is provided 'as-is', without any expressed or implied */
16 /* warranty. In no event will the authors be held liable for any damages */
17 /* arising from the use of this software. */
19 /* Permission is granted to anyone to use this software for any purpose, */
20 /* including commercial applications, and to alter it and redistribute it */
21 /* freely, subject to the following restrictions: */
23 /* 1. The origin of this software must not be misrepresented; you must not */
24 /* claim that you wrote the original software. If you use this software */
25 /* in a product, an acknowledgment in the product documentation would be */
26 /* appreciated but is not required. */
27 /* 2. Altered source versions must be plainly marked as such, and must not */
28 /* be misrepresented as being the original software. */
29 /* 3. This notice may not be removed or altered from any source */
32 /*****************************************************************************/
47 /*****************************************************************************/
49 /*****************************************************************************/
53 unsigned Read8 (FILE* F)
54 /* Read an 8 bit value from the file */
58 Error ("Read error (file corrupt?)");
65 unsigned Read16 (FILE* F)
66 /* Read a 16 bit value from the file */
68 unsigned Lo = Read8 (F);
69 unsigned Hi = Read8 (F);
70 return (Hi << 8) | Lo;
75 unsigned long Read24 (FILE* F)
76 /* Read a 24 bit value from the file */
78 unsigned long Lo = Read16 (F);
79 unsigned long Hi = Read8 (F);
80 return (Hi << 16) | Lo;
85 unsigned long Read32 (FILE* F)
86 /* Read a 32 bit value from the file */
88 unsigned long Lo = Read16 (F);
89 unsigned long Hi = Read16 (F);
90 return (Hi << 16) | Lo;
95 long Read32Signed (FILE* F)
96 /* Read a 32 bit value from the file. Sign extend the value. */
98 /* Read a 32 bit value */
99 unsigned long V = Read32 (F);
101 /* Sign extend the value */
102 if (V & 0x80000000UL) {
107 /* Return it as a long */
113 char* ReadStr (FILE* F, char* Str)
114 /* Read a string from the file. Str must hold 256 chars at max */
116 /* Read the length byte */
117 unsigned Len = Read8 (F);
119 /* Read the string itself */
120 ReadData (F, Str, Len);
122 /* Terminate the string and return it */
129 char* ReadMallocedStr (FILE* F)
130 /* Read a string from the file into a malloced area */
132 /* Read the length byte */
133 unsigned Len = Read8 (F);
135 /* Allocate memory */
136 char* Str = xmalloc (Len + 1);
138 /* Read the string itself */
139 ReadData (F, Str, Len);
141 /* Terminate the string and return it */
148 FilePos* ReadFilePos (FILE* F, FilePos* Pos)
149 /* Read a file position from the file */
151 /* The line number is encoded as 24 bit value to save some space */
152 Pos->Line = Read24 (F);
153 Pos->Col = Read8 (F);
154 Pos->Name = Read8 (F);
160 void* ReadData (FILE* F, void* Data, unsigned Size)
161 /* Read data from the file */
163 if (fread (Data, 1, Size, F) != Size) {
164 Error ("Read error (file corrupt?)");
171 void ReadObjHeader (FILE* F, ObjHeader* H)
172 /* Read an object file header from the file */
174 /* Read all fields */
175 H->Magic = Read32 (F);
176 H->Version = Read16 (F);
177 H->Flags = Read16 (F);
178 H->OptionOffs = Read32 (F);
179 H->OptionSize = Read32 (F);
180 H->FileOffs = Read32 (F);
181 H->FileSize = Read32 (F);
182 H->SegOffs = Read32 (F);
183 H->SegSize = Read32 (F);
184 H->ImportOffs = Read32 (F);
185 H->ImportSize = Read32 (F);
186 H->ExportOffs = Read32 (F);
187 H->ExportSize = Read32 (F);
188 H->DbgSymOffs = Read32 (F);
189 H->DbgSymSize = Read32 (F);