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third_party/sqlite/src/tool/rollback-test.c

Index: third_party/sqlite/src/tool/rollback-test.c
diff --git a/third_party/sqlite/src/tool/rollback-test.c b/third_party/sqlite/src/tool/rollback-test.c
new file mode 100644
index 0000000000000000000000000000000000000000..915d9d203dadf8dfbb36c987f66219edc5517791
--- /dev/null
+++ b/third_party/sqlite/src/tool/rollback-test.c
@@ -0,0 +1,155 @@
+/*
+** This program is used to generate and verify databases with hot journals.
+** Use this program to generate a hot journal on one machine and verify
+** that it rolls back correctly on another machine with a different
+** architecture.
+**
+** Usage:
+**
+**     rollback-test new [-utf8] [-utf16le] [-utf16be] [-pagesize=N] DATABASE
+**     rollback-test check DATABASE
+**     rollback-test crash [-wal] [-rollback] DATABASE
+*/
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "sqlite3.h"
+
+static void usage(char *argv0){
+  fprintf(stderr,
+    "Usage: %s new [-utf8] [-utf16le] [-utf16be] [-pagesize=N] DATABASE\n"
+    "       %s check DATABASE\n"
+    "       %s crash [-wal] DATABASE\n",
+    argv0, argv0, argv0
+  );
+  exit(1);
+}
+
+static sqlite3 *openDb(const char *zFilename){
+  int rc;
+  sqlite3 *db;
+  rc = sqlite3_open(zFilename, &db);
+  if( rc ){
+    fprintf(stderr, "Cannot open \"%s\": %s\n",
+            zFilename, sqlite3_errmsg(db));
+    sqlite3_close(db);
+    exit(1);
+  }
+  return db;
+}
+
+static int nReply = 0;
+static char zReply[1000];
+
+static int execCallback(void *NotUsed, int nArg, char **azArg, char **azCol){
+  int i, n;
+  char *z;
+  for(i=0; i<nArg; i++){
+    z = azArg[i];
+    if( z==0 ) z = "NULL";
+    if( nReply>0 && nReply<sizeof(zReply)-1 ) zReply[nReply++] = ' ';
+    n = strlen(z);
+    if( nReply+n>=sizeof(zReply)-1 ) n = sizeof(zReply) - nReply - 1;
+    memcpy(&zReply[nReply], z, n);
+    nReply += n;
+    zReply[nReply] = 0;
+  }
+  return 0;
+}
+
+static void runSql(sqlite3 *db, const char *zSql){
+  char *zErr = 0;
+  int rc;
+  nReply = 0;
+  rc = sqlite3_exec(db, zSql, execCallback, 0, &zErr);
+  if( zErr ){
+    fprintf(stderr, "SQL error: %s\n", zErr);
+    exit(1);
+  }
+  if( rc ){
+    fprintf(stderr, "SQL error: %s\n", sqlite3_errmsg(db));
+    exit(1);
+  }
+}
+
+int main(int argc, char **argv){
+  sqlite3 *db;
+  int i;
+
+  if( argc<3 ) usage(argv[0]);
+  if( strcmp(argv[1], "new")==0 ){
+    db = openDb(argv[argc-1]);
+    for(i=2; i<argc-1; i++){
+      if( strcmp(argv[i],"-utf8")==0 ){
+        runSql(db, "PRAGMA encoding=UTF8");
+      }else if( strcmp(argv[i], "-utf16le")==0 ){
+        runSql(db, "PRAGMA encoding=UTF16LE");
+      }else if( strcmp(argv[i], "-utf16be")==0 ){
+        runSql(db, "PRAGMA encoding=UTF16BE");
+      }else if( strncmp(argv[i], "-pagesize=", 10)==0 ){
+        int szPg = atoi(&argv[i][10]);
+        char zBuf[100];
+        sprintf(zBuf, "PRAGMA pagesize=%d", szPg);
+        runSql(db, zBuf);
+      }else{
+        fprintf(stderr, "unknown option %s\n", argv[i]);
+        usage(argv[0]);
+      }
+    }
+    runSql(db, 
+       "BEGIN;"
+       "CREATE TABLE t1(x INTEGER PRIMARY KEY, y);"
+       "INSERT INTO t1(y) VALUES('abcdefghijklmnopqrstuvwxyz');"
+       "INSERT INTO t1(y) VALUES('abcdefghijklmnopqrstuvwxyz');"
+       "INSERT INTO t1(y) SELECT y FROM t1;" /* 4 */
+       "INSERT INTO t1(y) SELECT y FROM t1;" /* 8 */
+       "INSERT INTO t1(y) SELECT y FROM t1;" /* 16 */
+       "INSERT INTO t1(y) SELECT y FROM t1;" /* 32 */
+       "INSERT INTO t1(y) SELECT y FROM t1;" /* 64 */
+       "INSERT INTO t1(y) SELECT y FROM t1;" /* 128 */
+       "INSERT INTO t1(y) SELECT y FROM t1;" /* 256 */
+       "INSERT INTO t1(y) SELECT y FROM t1;" /* 512 */
+       "INSERT INTO t1(y) SELECT y FROM t1;" /* 1024 */
+       "UPDATE t1 SET y=(y || x);"
+       "CREATE INDEX t1y ON t1(y);"
+       "COMMIT;"
+    );
+    sqlite3_close(db);
+  }else if( strcmp(argv[1], "check")==0 ){
+    db = openDb(argv[argc-1]);
+    runSql(db, "PRAGMA integrity_check");
+    if( strcmp(zReply, "ok")!=0 ){
+      fprintf(stderr, "Integrity check: %s\n", zReply);
+      exit(1);
+    }
+    runSql(db, 
+      "SELECT count(*) FROM t1 WHERE y<>('abcdefghijklmnopqrstuvwxyz' || x)"
+    );
+    if( strcmp(zReply, "0")!=0 ){
+      fprintf(stderr, "Wrong content\n");
+      exit(1);
+    }
+    printf("Ok\n");
+  }else if( strcmp(argv[1], "crash")==0 ){
+    db = openDb(argv[argc-1]);
+    for(i=2; i<argc-1; i++){
+      if( strcmp(argv[i],"-wal")==0 ){
+        runSql(db, "PRAGMA journal_mode=WAL");
+      }else if( strcmp(argv[i], "-rollback")==0 ){
+        runSql(db, "PRAGMA journal_mode=DELETE");
+      }else{
+        fprintf(stderr, "unknown option %s\n", argv[i]);
+        usage(argv[0]);
+      }
+    }
+    runSql(db,
+      "PRAGMA cache_size=10;"
+      "BEGIN;"
+      "UPDATE t1 SET y=(y || -x)"
+    );
+    exit(0);
+  }else{
+    usage(argv[0]);
+  }
+  return 0;
+}