[sqlite] Remove obsolete reference version 3.8.7.4.

third_party/sqlite/sqlite-src-3080704/src/test_sqllog.c

Index: third_party/sqlite/sqlite-src-3080704/src/test_sqllog.c
diff --git a/third_party/sqlite/sqlite-src-3080704/src/test_sqllog.c b/third_party/sqlite/sqlite-src-3080704/src/test_sqllog.c
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index 4aa68b7c429323b8eebe6c9c2d07fc660d8d47c9..0000000000000000000000000000000000000000
--- a/third_party/sqlite/sqlite-src-3080704/src/test_sqllog.c
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@@ -1,507 +0,0 @@
-/*
-** 2012 November 26
-**
-** The author disclaims copyright to this source code.  In place of
-** a legal notice, here is a blessing:
-**
-**    May you do good and not evil.
-**    May you find forgiveness for yourself and forgive others.
-**    May you share freely, never taking more than you give.
-**
-*************************************************************************
-**
-** OVERVIEW
-**
-**   This file contains experimental code used to record data from live
-**   SQLite applications that may be useful for offline analysis. 
-**   Specifically, this module can be used to capture the following
-**   information:
-**
-**     1) The initial contents of all database files opened by the 
-**        application, and
-**
-**     2) All SQL statements executed by the application.
-**
-**   The captured information can then be used to run (for example)
-**   performance analysis looking for slow queries or to look for
-**   optimization opportunities in either the application or in SQLite
-**   itself.
-**
-** USAGE
-**
-**   To use this module, SQLite must be compiled with the SQLITE_ENABLE_SQLLOG
-**   pre-processor symbol defined and this file linked into the application.
-**   One way to link this file into the application is to append the content
-**   of this file onto the end of the "sqlite3.c" amalgamation and then 
-**   recompile the application as normal except with the addition  of the
-**   -DSQLITE_ENABLE_SQLLOG option.
-**
-**   At runtime, logging is enabled by setting environment variable
-**   SQLITE_SQLLOG_DIR to the name of a directory in which to store logged 
-**   data. The logging directory must already exist.
-**
-**   Usually, if the application opens the same database file more than once
-**   (either by attaching it or by using more than one database handle), only
-**   a single copy is made. This behavior may be overridden (so that a 
-**   separate copy is taken each time the database file is opened or attached)
-**   by setting the environment variable SQLITE_SQLLOG_REUSE_FILES to 0.
-**
-** OUTPUT:
-**
-**   The SQLITE_SQLLOG_DIR is populated with three types of files:
-**
-**      sqllog_N.db   - Copies of database files. N may be any integer.
-**
-**      sqllog_N.sql  - A list of SQL statements executed by a single
-**                      connection. N may be any integer.
-**
-**      sqllog.idx    - An index mapping from integer N to a database
-**                      file name - indicating the full path of the
-**                      database from which sqllog_N.db was copied.
-**
-** ERROR HANDLING:
-**
-**   This module attempts to make a best effort to continue logging if an
-**   IO or other error is encountered. For example, if a log file cannot 
-**   be opened logs are not collected for that connection, but other
-**   logging proceeds as expected. Errors are logged by calling sqlite3_log().
-*/
-
-#ifndef _SQLITE3_H_
-#include "sqlite3.h"
-#endif
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <assert.h>
-
-#include <sys/types.h>
-#include <unistd.h>
-static int getProcessId(void){
-#if SQLITE_OS_WIN
-  return (int)_getpid();
-#else
-  return (int)getpid();
-#endif
-}
-
-/* Names of environment variables to be used */
-#define ENVIRONMENT_VARIABLE1_NAME "SQLITE_SQLLOG_DIR"
-#define ENVIRONMENT_VARIABLE2_NAME "SQLITE_SQLLOG_REUSE_FILES"
-
-/* Assume that all database and database file names are shorted than this. */
-#define SQLLOG_NAMESZ 512
-
-/* Maximum number of simultaneous database connections the process may
-** open (if any more are opened an error is logged using sqlite3_log()
-** and processing is halted).
-*/
-#define MAX_CONNECTIONS 256
-
-/* There is one instance of this object for each SQLite database connection
-** that is being logged.
-*/
-struct SLConn {
-  int isErr;                      /* True if an error has occurred */
-  sqlite3 *db;                    /* Connection handle */
-  int iLog;                       /* First integer value used in file names */
-  FILE *fd;                       /* File descriptor for log file */
-};
-
-/* This object is a singleton that keeps track of all data loggers.
-*/
-static struct SLGlobal {
-  /* Protected by MUTEX_STATIC_MASTER */
-  sqlite3_mutex *mutex;           /* Recursive mutex */
-  int nConn;                      /* Size of aConn[] array */
-
-  /* Protected by SLGlobal.mutex */
-  int bReuse;                     /* True to avoid extra copies of db files */
-  char zPrefix[SQLLOG_NAMESZ];    /* Prefix for all created files */
-  char zIdx[SQLLOG_NAMESZ];       /* Full path to *.idx file */
-  int iNextLog;                   /* Used to allocate file names */
-  int iNextDb;                    /* Used to allocate database file names */
-  int bRec;                       /* True if testSqllog() is called rec. */
-  int iClock;                     /* Clock value */
-  struct SLConn aConn[MAX_CONNECTIONS];
-} sqllogglobal;
-
-/*
-** Return true if c is an ASCII whitespace character.
-*/
-static int sqllog_isspace(char c){
-  return (c==' ' || c=='\t' || c=='\n' || c=='\v' || c=='\f' || c=='\r');
-}
-
-/*
-** The first argument points to a nul-terminated string containing an SQL
-** command. Before returning, this function sets *pz to point to the start
-** of the first token in this command, and *pn to the number of bytes in 
-** the token. This is used to check if the SQL command is an "ATTACH" or 
-** not.
-*/
-static void sqllogTokenize(const char *z, const char **pz, int *pn){
-  const char *p = z;
-  int n;
-
-  /* Skip past any whitespace */
-  while( sqllog_isspace(*p) ){
-    p++;
-  }
-
-  /* Figure out how long the first token is */
-  *pz = p;
-  n = 0;
-  while( (p[n]>='a' && p[n]<='z') || (p[n]>='A' && p[n]<='Z') ) n++;
-  *pn = n;
-}
-
-/*
-** Check if the logs directory already contains a copy of database file 
-** zFile. If so, return a pointer to the full path of the copy. Otherwise,
-** return NULL.
-**
-** If a non-NULL value is returned, then the caller must arrange to 
-** eventually free it using sqlite3_free().
-*/
-static char *sqllogFindFile(const char *zFile){
-  char *zRet = 0;
-  FILE *fd = 0;
-
-  /* Open the index file for reading */
-  fd = fopen(sqllogglobal.zIdx, "r");
-  if( fd==0 ){
-    sqlite3_log(SQLITE_IOERR, "sqllogFindFile(): error in fopen()");
-    return 0;
-  }
-
-  /* Loop through each entry in the index file. If zFile is not NULL and the
-  ** entry is a match, then set zRet to point to the filename of the existing
-  ** copy and break out of the loop.  */
-  while( feof(fd)==0 ){
-    char zLine[SQLLOG_NAMESZ*2+5];
-    if( fgets(zLine, sizeof(zLine), fd) ){
-      int n;
-      char *z;
-
-      zLine[sizeof(zLine)-1] = '\0';
-      z = zLine;
-      while( *z>='0' && *z<='9' ) z++;
-      while( *z==' ' ) z++;
-
-      n = strlen(z);
-      while( n>0 && sqllog_isspace(z[n-1]) ) n--;
-
-      if( n==strlen(zFile) && 0==memcmp(zFile, z, n) ){
-        char zBuf[16];
-        memset(zBuf, 0, sizeof(zBuf));
-        z = zLine;
-        while( *z>='0' && *z<='9' ){
-          zBuf[z-zLine] = *z;
-          z++;
-        }
-        zRet = sqlite3_mprintf("%s_%s.db", sqllogglobal.zPrefix, zBuf);
-        break;
-      }
-    }
-  }
-
-  if( ferror(fd) ){
-    sqlite3_log(SQLITE_IOERR, "sqllogFindFile(): error reading index file");
-  }
-
-  fclose(fd);
-  return zRet;
-}
-
-static int sqllogFindAttached(
-  struct SLConn *p,               /* Database connection */
-  const char *zSearch,            /* Name to search for (or NULL) */
-  char *zName,                    /* OUT: Name of attached database */
-  char *zFile                     /* OUT: Name of attached file */
-){
-  sqlite3_stmt *pStmt;
-  int rc;
-
-  /* The "PRAGMA database_list" command returns a list of databases in the
-  ** order that they were attached. So a newly attached database is 
-  ** described by the last row returned.  */
-  assert( sqllogglobal.bRec==0 );
-  sqllogglobal.bRec = 1;
-  rc = sqlite3_prepare_v2(p->db, "PRAGMA database_list", -1, &pStmt, 0);
-  if( rc==SQLITE_OK ){
-    while( SQLITE_ROW==sqlite3_step(pStmt) ){
-      const char *zVal1; int nVal1;
-      const char *zVal2; int nVal2;
-
-      zVal1 = (const char*)sqlite3_column_text(pStmt, 1);
-      nVal1 = sqlite3_column_bytes(pStmt, 1);
-      memcpy(zName, zVal1, nVal1+1);
-
-      zVal2 = (const char*)sqlite3_column_text(pStmt, 2);
-      nVal2 = sqlite3_column_bytes(pStmt, 2);
-      memcpy(zFile, zVal2, nVal2+1);
-
-      if( zSearch && strlen(zSearch)==nVal1 
-       && 0==sqlite3_strnicmp(zSearch, zVal1, nVal1)
-      ){
-        break;
-      }
-    }
-    rc = sqlite3_finalize(pStmt);
-  }
-  sqllogglobal.bRec = 0;
-
-  if( rc!=SQLITE_OK ){
-    sqlite3_log(rc, "sqllogFindAttached(): error in \"PRAGMA database_list\"");
-  }
-  return rc;
-}
-
-
-/*
-** Parameter zSearch is the name of a database attached to the database 
-** connection associated with the first argument. This function creates
-** a backup of this database in the logs directory.
-**
-** The name used for the backup file is automatically generated. Call
-** it zFile.
-**
-** If the bLog parameter is true, then a statement of the following form
-** is written to the log file associated with *p:
-**
-**    ATTACH 'zFile' AS 'zName';
-**
-** Otherwise, if bLog is false, a comment is added to the log file:
-**
-**    -- Main database file is 'zFile'
-**
-** The SLGlobal.mutex mutex is always held when this function is called.
-*/
-static void sqllogCopydb(struct SLConn *p, const char *zSearch, int bLog){
-  char zName[SQLLOG_NAMESZ];      /* Attached database name */
-  char zFile[SQLLOG_NAMESZ];      /* Database file name */
-  char *zFree;
-  char *zInit = 0;
-  int rc;
-
-  rc = sqllogFindAttached(p, zSearch, zName, zFile);
-  if( rc!=SQLITE_OK ) return;
-
-  if( zFile[0]=='\0' ){
-    zInit = sqlite3_mprintf("");
-  }else{
-    if( sqllogglobal.bReuse ){
-      zInit = sqllogFindFile(zFile);
-    }else{
-      zInit = 0;
-    }
-    if( zInit==0 ){
-      int rc;
-      sqlite3 *copy = 0;
-      int iDb;
-
-      /* Generate a file-name to use for the copy of this database */
-      iDb = sqllogglobal.iNextDb++;
-      zInit = sqlite3_mprintf("%s_%d.db", sqllogglobal.zPrefix, iDb);
-
-      /* Create the backup */
-      assert( sqllogglobal.bRec==0 );
-      sqllogglobal.bRec = 1;
-      rc = sqlite3_open(zInit, &copy);
-      if( rc==SQLITE_OK ){
-        sqlite3_backup *pBak;
-        sqlite3_exec(copy, "PRAGMA synchronous = 0", 0, 0, 0);
-        pBak = sqlite3_backup_init(copy, "main", p->db, zName);
-        if( pBak ){
-          sqlite3_backup_step(pBak, -1);
-          rc = sqlite3_backup_finish(pBak);
-        }else{
-          rc = sqlite3_errcode(copy);
-        }
-        sqlite3_close(copy);
-      }
-      sqllogglobal.bRec = 0;
-
-      if( rc==SQLITE_OK ){
-        /* Write an entry into the database index file */
-        FILE *fd = fopen(sqllogglobal.zIdx, "a");
-        if( fd ){
-          fprintf(fd, "%d %s\n", iDb, zFile);
-          fclose(fd);
-        }
-      }else{
-        sqlite3_log(rc, "sqllogCopydb(): error backing up database");
-      }
-    }
-  }
-
-  if( bLog ){
-    zFree = sqlite3_mprintf("ATTACH '%q' AS '%q'; -- clock=%d\n", 
-        zInit, zName, sqllogglobal.iClock++
-    );
-  }else{
-    zFree = sqlite3_mprintf("-- Main database is '%q'\n", zInit);
-  }
-  fprintf(p->fd, "%s", zFree);
-  sqlite3_free(zFree);
-
-  sqlite3_free(zInit);
-}
-
-/*
-** If it is not already open, open the log file for connection *p. 
-**
-** The SLGlobal.mutex mutex is always held when this function is called.
-*/
-static void sqllogOpenlog(struct SLConn *p){
-  /* If the log file has not yet been opened, open it now. */
-  if( p->fd==0 ){
-    char *zLog;
-
-    /* If it is still NULL, have global.zPrefix point to a copy of 
-    ** environment variable $ENVIRONMENT_VARIABLE1_NAME.  */
-    if( sqllogglobal.zPrefix[0]==0 ){
-      FILE *fd;
-      char *zVar = getenv(ENVIRONMENT_VARIABLE1_NAME);
-      if( zVar==0 || strlen(zVar)+10>=(sizeof(sqllogglobal.zPrefix)) ) return;
-      sprintf(sqllogglobal.zPrefix, "%s/sqllog_%d", zVar, getProcessId());
-      sprintf(sqllogglobal.zIdx, "%s.idx", sqllogglobal.zPrefix);
-      if( getenv(ENVIRONMENT_VARIABLE2_NAME) ){
-        sqllogglobal.bReuse = atoi(getenv(ENVIRONMENT_VARIABLE2_NAME));
-      }
-      fd = fopen(sqllogglobal.zIdx, "w");
-      if( fd ) fclose(fd);
-    }
-
-    /* Open the log file */
-    zLog = sqlite3_mprintf("%s_%d.sql", sqllogglobal.zPrefix, p->iLog);
-    p->fd = fopen(zLog, "w");
-    sqlite3_free(zLog);
-    if( p->fd==0 ){
-      sqlite3_log(SQLITE_IOERR, "sqllogOpenlog(): Failed to open log file");
-    }
-  }
-}
-
-/*
-** This function is called if the SQLLOG callback is invoked to report
-** execution of an SQL statement. Parameter p is the connection the statement
-** was executed by and parameter zSql is the text of the statement itself.
-*/
-static void testSqllogStmt(struct SLConn *p, const char *zSql){
-  const char *zFirst;             /* Pointer to first token in zSql */
-  int nFirst;                     /* Size of token zFirst in bytes */
-
-  sqllogTokenize(zSql, &zFirst, &nFirst);
-  if( nFirst!=6 || 0!=sqlite3_strnicmp("ATTACH", zFirst, 6) ){
-    /* Not an ATTACH statement. Write this directly to the log. */
-    fprintf(p->fd, "%s; -- clock=%d\n", zSql, sqllogglobal.iClock++);
-  }else{
-    /* This is an ATTACH statement. Copy the database. */
-    sqllogCopydb(p, 0, 1);
-  }
-}
-
-/*
-** The SQLITE_CONFIG_SQLLOG callback registered by sqlite3_init_sqllog().
-**
-** The eType parameter has the following values:
-**
-**    0:  Opening a new database connection.  zSql is the name of the
-**        file being opened.  db is a pointer to the newly created database
-**        connection.
-**
-**    1:  An SQL statement has run to completion.  zSql is the text of the
-**        SQL statement with all parameters expanded to their actual values.
-**
-**    2:  Closing a database connection.  zSql is NULL.  The db pointer to
-**        the database connection being closed has already been shut down
-**        and cannot be used for any further SQL.
-**
-** The pCtx parameter is a copy of the pointer that was originally passed
-** into the sqlite3_config(SQLITE_CONFIG_SQLLOG) statement.  In this
-** particular implementation, pCtx is always a pointer to the 
-** sqllogglobal global variable define above.
-*/
-static void testSqllog(void *pCtx, sqlite3 *db, const char *zSql, int eType){
-  struct SLConn *p = 0;
-  sqlite3_mutex *master = sqlite3_mutex_alloc(SQLITE_MUTEX_STATIC_MASTER);
-
-  assert( eType==0 || eType==1 || eType==2 );
-  assert( (eType==2)==(zSql==0) );
-
-  /* This is a database open command. */
-  if( eType==0 ){
-    sqlite3_mutex_enter(master);
-    if( sqllogglobal.mutex==0 ){
-      sqllogglobal.mutex = sqlite3_mutex_alloc(SQLITE_MUTEX_RECURSIVE);
-    }
-    p = &sqllogglobal.aConn[sqllogglobal.nConn++];
-    p->fd = 0;
-    p->db = db;
-    p->iLog = sqllogglobal.iNextLog++;
-    sqlite3_mutex_leave(master);
-
-    /* Open the log and take a copy of the main database file */
-    sqlite3_mutex_enter(sqllogglobal.mutex);
-    if( sqllogglobal.bRec==0 ){
-      sqllogOpenlog(p);
-      if( p->fd ) sqllogCopydb(p, "main", 0);
-    }
-    sqlite3_mutex_leave(sqllogglobal.mutex);
-  }
-
-  else{
-
-    int i;
-    for(i=0; i<sqllogglobal.nConn; i++){
-      p = &sqllogglobal.aConn[i];
-      if( p->db==db ) break;
-    }
-    if( i==sqllogglobal.nConn ) return;
-
-    /* A database handle close command */
-    if( eType==2 ){
-      sqlite3_mutex_enter(master);
-      if( p->fd ) fclose(p->fd);
-      p->db = 0;
-      p->fd = 0;
-
-      sqllogglobal.nConn--;
-      if( sqllogglobal.nConn==0 ){
-        sqlite3_mutex_free(sqllogglobal.mutex);
-        sqllogglobal.mutex = 0;
-      }else{
-        int nShift = &sqllogglobal.aConn[sqllogglobal.nConn] - p;
-        if( nShift>0 ){
-          memmove(p, &p[1], nShift*sizeof(struct SLConn));
-        }
-      }
-      sqlite3_mutex_leave(master);
-
-    /* An ordinary SQL command. */
-    }else if( p->fd ){
-      sqlite3_mutex_enter(sqllogglobal.mutex);
-      if( sqllogglobal.bRec==0 ){
-        testSqllogStmt(p, zSql);
-      }
-      sqlite3_mutex_leave(sqllogglobal.mutex);
-    }
-  }
-}
-
-/*
-** This function is called either before sqlite3_initialized() or by it.
-** It checks if the SQLITE_SQLLOG_DIR variable is defined, and if so 
-** registers an SQLITE_CONFIG_SQLLOG callback to record the applications
-** database activity.
-*/
-void sqlite3_init_sqllog(void){
-  if( getenv(ENVIRONMENT_VARIABLE1_NAME) ){
-    if( SQLITE_OK==sqlite3_config(SQLITE_CONFIG_SQLLOG, testSqllog, 0) ){
-      memset(&sqllogglobal, 0, sizeof(sqllogglobal));
-      sqllogglobal.bReuse = 1;
-    }
-  }
-}