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1/*
2** 2007 April 6
3**
4** The author disclaims copyright to this source code. In place of
5** a legal notice, here is a blessing:
6**
7** May you do good and not evil.
8** May you find forgiveness for yourself and forgive others.
9** May you share freely, never taking more than you give.
10**
11*************************************************************************
12** Code for testing all sorts of SQLite interfaces. This code
13** implements TCL commands for reading and writing the binary
14** database files and displaying the content of those files as
15** hexadecimal. We could, in theory, use the built-in "binary"
16** command of TCL to do a lot of this, but there are some issues
17** with historical versions of the "binary" command. So it seems
18** easier and safer to build our own mechanism.
19**
20** $Id: test_hexio.c,v 1.5 2007/09/01 11:04:27 danielk1977 Exp $
21*/
22#include "sqliteInt.h"
23#include "tcl.h"
24#include <stdlib.h>
25#include <string.h>
26#include <assert.h>
27
28
29/*
30** Convert binary to hex. The input zBuf[] contains N bytes of
31** binary data. zBuf[] is 2*n+1 bytes long. Overwrite zBuf[]
32** with a hexadecimal representation of its original binary input.
33*/
34static void binToHex(unsigned char *zBuf, int N){
35 const unsigned char zHex[] = "0123456789ABCDEF";
36 int i, j;
37 unsigned char c;
38 i = N*2;
39 zBuf[i--] = 0;
40 for(j=N-1; j>=0; j--){
41 c = zBuf[j];
42 zBuf[i--] = zHex[c&0xf];
43 zBuf[i--] = zHex[c>>4];
44 }
45 assert( i==-1 );
46}
47
48/*
49** Convert hex to binary. The input zIn[] contains N bytes of
50** hexadecimal. Convert this into binary and write aOut[] with
51** the binary data. Spaces in the original input are ignored.
52** Return the number of bytes of binary rendered.
53*/
54static int hexToBin(const unsigned char *zIn, int N, unsigned char *aOut){
55 const unsigned char aMap[] = {
56 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
57 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
58 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
59 1, 2, 3, 4, 5, 6, 7, 8, 9,10, 0, 0, 0, 0, 0, 0,
60 0,11,12,13,14,15,16, 0, 0, 0, 0, 0, 0, 0, 0, 0,
61 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
62 0,11,12,13,14,15,16, 0, 0, 0, 0, 0, 0, 0, 0, 0,
63 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
64 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
65 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
66 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
67 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
68 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
69 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
70 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
71 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
72 };
73 int i, j;
74 int hi=1;
75 unsigned char c;
76
77 for(i=j=0; i<N; i++){
78 c = aMap[zIn[i]];
79 if( c==0 ) continue;
80 if( hi ){
81 aOut[j] = (c-1)<<4;
82 hi = 0;
83 }else{
84 aOut[j++] |= c-1;
85 hi = 1;
86 }
87 }
88 return j;
89}
90
91
92/*
93** Usage: hexio_read FILENAME OFFSET AMT
94**
95** Read AMT bytes from file FILENAME beginning at OFFSET from the
96** beginning of the file. Convert that information to hexadecimal
97** and return the resulting HEX string.
98*/
99static int hexio_read(
100 void * clientData,
101 Tcl_Interp *interp,
102 int objc,
103 Tcl_Obj *CONST objv[]
104){
105 int offset;
106 int amt, got;
107 const char *zFile;
108 unsigned char *zBuf;
109 FILE *in;
110
111 if( objc!=4 ){
112 Tcl_WrongNumArgs(interp, 1, objv, "FILENAME OFFSET AMT");
113 return TCL_ERROR;
114 }
115 if( Tcl_GetIntFromObj(interp, objv[2], &offset) ) return TCL_ERROR;
116 if( Tcl_GetIntFromObj(interp, objv[3], &amt) ) return TCL_ERROR;
117 zFile = Tcl_GetString(objv[1]);
118 zBuf = sqlite3_malloc( amt*2+1 );
119 if( zBuf==0 ){
120 return TCL_ERROR;
121 }
122 in = fopen(zFile, "r");
123 if( in==0 ){
124 Tcl_AppendResult(interp, "cannot open input file ", zFile, 0);
125 return TCL_ERROR;
126 }
127 fseek(in, offset, SEEK_SET);
128 got = fread(zBuf, 1, amt, in);
129 fclose(in);
130 if( got<0 ){
131 got = 0;
132 }
133 binToHex(zBuf, got);
134 Tcl_AppendResult(interp, zBuf, 0);
135 sqlite3_free(zBuf);
136 return TCL_OK;
137}
138
139
140/*
141** Usage: hexio_write FILENAME OFFSET DATA
142**
143** Write DATA into file FILENAME beginning at OFFSET from the
144** beginning of the file. DATA is expressed in hexadecimal.
145*/
146static int hexio_write(
147 void * clientData,
148 Tcl_Interp *interp,
149 int objc,
150 Tcl_Obj *CONST objv[]
151){
152 int offset;
153 int nIn, nOut, written;
154 const char *zFile;
155 const unsigned char *zIn;
156 unsigned char *aOut;
157 FILE *out;
158
159 if( objc!=4 ){
160 Tcl_WrongNumArgs(interp, 1, objv, "FILENAME OFFSET HEXDATA");
161 return TCL_ERROR;
162 }
163 if( Tcl_GetIntFromObj(interp, objv[2], &offset) ) return TCL_ERROR;
164 zFile = Tcl_GetString(objv[1]);
165 zIn = (const unsigned char *)Tcl_GetStringFromObj(objv[3], &nIn);
166 aOut = sqlite3_malloc( nIn/2 );
167 if( aOut==0 ){
168 return TCL_ERROR;
169 }
170 nOut = hexToBin(zIn, nIn, aOut);
171 out = fopen(zFile, "r+");
172 if( out==0 ){
173 Tcl_AppendResult(interp, "cannot open output file ", zFile, 0);
174 return TCL_ERROR;
175 }
176 fseek(out, offset, SEEK_SET);
177 written = fwrite(aOut, 1, nOut, out);
178 sqlite3_free(aOut);
179 fclose(out);
180 Tcl_SetObjResult(interp, Tcl_NewIntObj(written));
181 return TCL_OK;
182}
183
184/*
185** USAGE: hexio_get_int HEXDATA
186**
187** Interpret the HEXDATA argument as a big-endian integer. Return
188** the value of that integer. HEXDATA can contain between 2 and 8
189** hexadecimal digits.
190*/
191static int hexio_get_int(
192 void * clientData,
193 Tcl_Interp *interp,
194 int objc,
195 Tcl_Obj *CONST objv[]
196){
197 int val;
198 int nIn, nOut;
199 const unsigned char *zIn;
200 unsigned char *aOut;
201 unsigned char aNum[4];
202
203 if( objc!=2 ){
204 Tcl_WrongNumArgs(interp, 1, objv, "HEXDATA");
205 return TCL_ERROR;
206 }
207 zIn = (const unsigned char *)Tcl_GetStringFromObj(objv[1], &nIn);
208 aOut = sqlite3_malloc( nIn/2 );
209 if( aOut==0 ){
210 return TCL_ERROR;
211 }
212 nOut = hexToBin(zIn, nIn, aOut);
213 if( nOut>=4 ){
214 memcpy(aNum, aOut, 4);
215 }else{
216 memset(aNum, 0, sizeof(aNum));
217 memcpy(&aNum[4-nOut], aOut, nOut);
218 }
219 sqlite3_free(aOut);
220 val = (aNum[0]<<24) | (aNum[1]<<16) | (aNum[2]<<8) | aNum[3];
221 Tcl_SetObjResult(interp, Tcl_NewIntObj(val));
222 return TCL_OK;
223}
224
225
226/*
227** USAGE: hexio_render_int16 INTEGER
228**
229** Render INTEGER has a 16-bit big-endian integer in hexadecimal.
230*/
231static int hexio_render_int16(
232 void * clientData,
233 Tcl_Interp *interp,
234 int objc,
235 Tcl_Obj *CONST objv[]
236){
237 int val;
238 unsigned char aNum[10];
239
240 if( objc!=2 ){
241 Tcl_WrongNumArgs(interp, 1, objv, "INTEGER");
242 return TCL_ERROR;
243 }
244 if( Tcl_GetIntFromObj(interp, objv[1], &val) ) return TCL_ERROR;
245 aNum[0] = val>>8;
246 aNum[1] = val;
247 binToHex(aNum, 2);
248 Tcl_SetObjResult(interp, Tcl_NewStringObj((char*)aNum, 4));
249 return TCL_OK;
250}
251
252
253/*
254** USAGE: hexio_render_int32 INTEGER
255**
256** Render INTEGER has a 32-bit big-endian integer in hexadecimal.
257*/
258static int hexio_render_int32(
259 void * clientData,
260 Tcl_Interp *interp,
261 int objc,
262 Tcl_Obj *CONST objv[]
263){
264 int val;
265 unsigned char aNum[10];
266
267 if( objc!=2 ){
268 Tcl_WrongNumArgs(interp, 1, objv, "INTEGER");
269 return TCL_ERROR;
270 }
271 if( Tcl_GetIntFromObj(interp, objv[1], &val) ) return TCL_ERROR;
272 aNum[0] = val>>24;
273 aNum[1] = val>>16;
274 aNum[2] = val>>8;
275 aNum[3] = val;
276 binToHex(aNum, 4);
277 Tcl_SetObjResult(interp, Tcl_NewStringObj((char*)aNum, 8));
278 return TCL_OK;
279}
280
281/*
282** USAGE: utf8_to_utf8 HEX
283**
284** The argument is a UTF8 string represented in hexadecimal.
285** The UTF8 might not be well-formed. Run this string through
286** sqlite3Utf8to8() convert it back to hex and return the result.
287*/
288static int utf8_to_utf8(
289 void * clientData,
290 Tcl_Interp *interp,
291 int objc,
292 Tcl_Obj *CONST objv[]
293){
294#ifdef SQLITE_DEBUG
295 int n;
296 int nOut;
297 const unsigned char *zOrig;
298 unsigned char *z;
299 if( objc!=2 ){
300 Tcl_WrongNumArgs(interp, 1, objv, "HEX");
301 return TCL_ERROR;
302 }
303 zOrig = (unsigned char *)Tcl_GetStringFromObj(objv[1], &n);
304 z = sqlite3_malloc( n+3 );
305 n = hexToBin(zOrig, n, z);
306 z[n] = 0;
307 nOut = sqlite3Utf8To8(z);
308 binToHex(z,nOut);
309 Tcl_AppendResult(interp, (char*)z, 0);
310 sqlite3_free(z);
311#endif
312 return TCL_OK;
313}
314
315
316/*
317** Register commands with the TCL interpreter.
318*/
319int Sqlitetest_hexio_Init(Tcl_Interp *interp){
320 static struct {
321 char *zName;
322 Tcl_ObjCmdProc *xProc;
323 } aObjCmd[] = {
324 { "hexio_read", hexio_read },
325 { "hexio_write", hexio_write },
326 { "hexio_get_int", hexio_get_int },
327 { "hexio_render_int16", hexio_render_int16 },
328 { "hexio_render_int32", hexio_render_int32 },
329 { "utf8_to_utf8", utf8_to_utf8 },
330 };
331 int i;
332 for(i=0; i<sizeof(aObjCmd)/sizeof(aObjCmd[0]); i++){
333 Tcl_CreateObjCommand(interp, aObjCmd[i].zName, aObjCmd[i].xProc, 0, 0);
334 }
335 return TCL_OK;
336}
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