From: drh <drh@noemail.net>
Date: Mon, 7 Dec 2020 17:15:32 +0000 (+0000)
Subject: Begin adding new SQL functions that depend on -lm:  ceil(), ceiling(),
X-Git-Tag: version-3.35.0~197
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=f6e904bd9243498889ae3e628aeef9f697c728c9;p=thirdparty%2Fsqlite.git

Begin adding new SQL functions that depend on -lm:  ceil(), ceiling(),
floor(), ln(), log(), and log10() so far.  More to follow.

FossilOrigin-Name: 4db5f2f7875f6df78630a7816fc018141a6eee2e295b44fc7627eb66d07881ea
---

diff --git a/Makefile.msc b/Makefile.msc
index 404e3b2360..af39679a8f 100644
--- a/Makefile.msc
+++ b/Makefile.msc
@@ -380,6 +380,9 @@ OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_SESSION=1
 OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_PREUPDATE_HOOK=1
 !ENDIF
 
+# Always enable math functions on Windows
+OPT_FEATURE_FLAGS = $(OPT_FEATURE_FLAGS) -DSQLITE_ENABLE_MATH_FUNCTIONS
+
 # Should the rbu extension be enabled?  If so, add compilation options
 # to enable it.
 #
diff --git a/configure b/configure
index 90cb4d25e8..5a313189b1 100755
--- a/configure
+++ b/configure
@@ -1557,6 +1557,7 @@ Optional Features:
                           separately
   --disable-load-extension
                           Disable loading of external extensions
+  --disable-math          Disable math functions
   --enable-memsys5        Enable MEMSYS5
   --enable-memsys3        Enable MEMSYS3
   --enable-all            Enable FTS4, FTS5, Geopoly, JSON, RTree, Sessions
@@ -3935,13 +3936,13 @@ if ${lt_cv_nm_interface+:} false; then :
 else
   lt_cv_nm_interface="BSD nm"
   echo "int some_variable = 0;" > conftest.$ac_ext
-  (eval echo "\"\$as_me:3938: $ac_compile\"" >&5)
+  (eval echo "\"\$as_me:3939: $ac_compile\"" >&5)
   (eval "$ac_compile" 2>conftest.err)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:3941: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
+  (eval echo "\"\$as_me:3942: $NM \\\"conftest.$ac_objext\\\"\"" >&5)
   (eval "$NM \"conftest.$ac_objext\"" 2>conftest.err > conftest.out)
   cat conftest.err >&5
-  (eval echo "\"\$as_me:3944: output\"" >&5)
+  (eval echo "\"\$as_me:3945: output\"" >&5)
   cat conftest.out >&5
   if $GREP 'External.*some_variable' conftest.out > /dev/null; then
     lt_cv_nm_interface="MS dumpbin"
@@ -5147,7 +5148,7 @@ ia64-*-hpux*)
   ;;
 *-*-irix6*)
   # Find out which ABI we are using.
-  echo '#line 5150 "configure"' > conftest.$ac_ext
+  echo '#line 5151 "configure"' > conftest.$ac_ext
   if { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_compile\""; } >&5
   (eval $ac_compile) 2>&5
   ac_status=$?
@@ -6672,11 +6673,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:6675: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:6676: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:6679: \$? = $ac_status" >&5
+   echo "$as_me:6680: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -7011,11 +7012,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7014: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7015: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>conftest.err)
    ac_status=$?
    cat conftest.err >&5
-   echo "$as_me:7018: \$? = $ac_status" >&5
+   echo "$as_me:7019: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s "$ac_outfile"; then
      # The compiler can only warn and ignore the option if not recognized
      # So say no if there are warnings other than the usual output.
@@ -7116,11 +7117,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7119: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7120: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:7123: \$? = $ac_status" >&5
+   echo "$as_me:7124: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -7171,11 +7172,11 @@ else
    -e 's:.*FLAGS}\{0,1\} :&$lt_compiler_flag :; t' \
    -e 's: [^ ]*conftest\.: $lt_compiler_flag&:; t' \
    -e 's:$: $lt_compiler_flag:'`
-   (eval echo "\"\$as_me:7174: $lt_compile\"" >&5)
+   (eval echo "\"\$as_me:7175: $lt_compile\"" >&5)
    (eval "$lt_compile" 2>out/conftest.err)
    ac_status=$?
    cat out/conftest.err >&5
-   echo "$as_me:7178: \$? = $ac_status" >&5
+   echo "$as_me:7179: \$? = $ac_status" >&5
    if (exit $ac_status) && test -s out/conftest2.$ac_objext
    then
      # The compiler can only warn and ignore the option if not recognized
@@ -9551,7 +9552,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 9554 "configure"
+#line 9555 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -9647,7 +9648,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 9650 "configure"
+#line 9651 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -11411,6 +11412,81 @@ else
   OPT_FEATURE_FLAGS="-DSQLITE_OMIT_LOAD_EXTENSION=1"
 fi
 
+##########
+# Do we want to support math functions
+#
+# Check whether --enable-threadsafe was given.
+if test "${enable_threadsafe+set}" = set; then :
+  enableval=$enable_threadsafe;
+fi
+
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether to support math functions" >&5
+$as_echo_n "checking whether to support math functions... " >&6; }
+if test "$enable_math" = "no"; then
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
+$as_echo "no" >&6; }
+else
+  { $as_echo "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+$as_echo "yes" >&6; }
+  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_MATH_FUNCTIONS"
+  { $as_echo "$as_me:${as_lineno-$LINENO}: checking for library containing ceil" >&5
+$as_echo_n "checking for library containing ceil... " >&6; }
+if ${ac_cv_search_ceil+:} false; then :
+  $as_echo_n "(cached) " >&6
+else
+  ac_func_search_save_LIBS=$LIBS
+cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+/* Override any GCC internal prototype to avoid an error.
+   Use char because int might match the return type of a GCC
+   builtin and then its argument prototype would still apply.  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char ceil ();
+int
+main ()
+{
+return ceil ();
+  ;
+  return 0;
+}
+_ACEOF
+for ac_lib in '' m; do
+  if test -z "$ac_lib"; then
+    ac_res="none required"
+  else
+    ac_res=-l$ac_lib
+    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+  fi
+  if ac_fn_c_try_link "$LINENO"; then :
+  ac_cv_search_ceil=$ac_res
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext
+  if ${ac_cv_search_ceil+:} false; then :
+  break
+fi
+done
+if ${ac_cv_search_ceil+:} false; then :
+
+else
+  ac_cv_search_ceil=no
+fi
+rm conftest.$ac_ext
+LIBS=$ac_func_search_save_LIBS
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_search_ceil" >&5
+$as_echo "$ac_cv_search_ceil" >&6; }
+ac_res=$ac_cv_search_ceil
+if test "$ac_res" != no; then :
+  test "$ac_res" = "none required" || LIBS="$ac_res $LIBS"
+
+fi
+
+fi
+
 ##########
 # Do we want to support memsys3 and/or memsys5
 #
diff --git a/configure.ac b/configure.ac
index bb8f4bd563..5285581eec 100644
--- a/configure.ac
+++ b/configure.ac
@@ -586,6 +586,20 @@ else
   OPT_FEATURE_FLAGS="-DSQLITE_OMIT_LOAD_EXTENSION=1"
 fi
 
+##########
+# Do we want to support math functions
+#
+AC_ARG_ENABLE(threadsafe, 
+AC_HELP_STRING([--disable-math],[Disable math functions]))
+AC_MSG_CHECKING([whether to support math functions])
+if test "$enable_math" = "no"; then
+  AC_MSG_RESULT([no])
+else
+  AC_MSG_RESULT([yes])
+  OPT_FEATURE_FLAGS="${OPT_FEATURE_FLAGS} -DSQLITE_ENABLE_MATH_FUNCTIONS"
+  AC_SEARCH_LIBS(ceil, m)
+fi
+
 ##########
 # Do we want to support memsys3 and/or memsys5
 #
diff --git a/manifest b/manifest
index 5e328f066a..9347e389ec 100644
--- a/manifest
+++ b/manifest
@@ -1,11 +1,11 @@
-C Fix\sharmless\scompiler\swarnings\sassociated\swith\sthe\srecent\sFTS5\senhancements.
-D 2020-12-04T17:05:16.189
+C Begin\sadding\snew\sSQL\sfunctions\sthat\sdepend\son\s-lm:\s\sceil(),\sceiling(),\nfloor(),\sln(),\slog(),\sand\slog10()\sso\sfar.\s\sMore\sto\sfollow.
+D 2020-12-07T17:15:32.150
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
 F Makefile.in 0e88f5d095213a9ccd45c5bbd871c8ead498f886dff4493471fbf48b1f867f9d
 F Makefile.linux-gcc f609543700659711fbd230eced1f01353117621dccae7b9fb70daa64236c5241
-F Makefile.msc dd10dbf63b2f8ac3e2f0542963a21bc69058976ac4355165f212a31c83d17f44
+F Makefile.msc ad07bbd645132533e1fd7164a03acfa9afecda378b3787c10f62ab4c7c45e6ea
 F README.md 1514a365ffca3c138e00c5cc839906108a01011a6b082bad19b09781e3aa498a
 F VERSION 92f3e4c5cdee6f0779aef1eae857dfc21d0eabb1f2af169dc90e63cd76b15bb2
 F aclocal.m4 a5c22d164aff7ed549d53a90fa56d56955281f50
@@ -34,8 +34,8 @@ F autoconf/tea/win/rules.vc c511f222b80064096b705dbeb97060ee1d6b6d63
 F config.guess 883205ddf25b46f10c181818bf42c09da9888884af96f79e1719264345053bd6
 F config.h.in 6376abec766e9a0785178b1823b5a587e9f1ccbc
 F config.sub c2d0260f17f3e4bc0b6808fccf1b291cb5e9126c14fc5890efc77b9fd0175559
-F configure 73234664de11cb7f1f1b198fe6775d8b0f01d25480d325a7b9f9645675bf6b79 x
-F configure.ac 73545c21eebcef9398d85c982c7be260f07708256778221b541f83ae8c6f61eb
+F configure 79bcd87c8c18e4e60a9b0282c259b9db912e68c086cb65634628763b3c6b6321 x
+F configure.ac b865a0e9724d09b5e510d07340901ecfceab706c8d21f26d55914f2d1be7dc7e
 F contrib/sqlitecon.tcl 210a913ad63f9f991070821e599d600bd913e0ad
 F doc/F2FS.txt c1d4a0ae9711cfe0e1d8b019d154f1c29e0d3abfe820787ba1e9ed7691160fcd
 F doc/lemon.html c5d8ba85ac1daef7be8c2d389899480eb62451ff5c09b0c28ff8157bb8770746
@@ -487,7 +487,7 @@ F src/btreeInt.h ffd66480520d9d70222171b3a026d78b80833b5cea49c89867949f3e023d5f4
 F src/build.c f6449d4e85e998e14d3f537e8ea898dca2fcb83c277db3e60945af9b9177db81
 F src/callback.c d0b853dd413255d2e337b34545e54d888ea02f20da5ad0e63585b389624c4a6c
 F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
-F src/ctime.c e98518d2d3d4029a13c805e07313fb60c877be56db76e90dd5f3af73085d0ce6
+F src/ctime.c 0bcc6a908779a520be534fd985b2185dfd457588b6798d0bcbf37755a044b7c3
 F src/date.c dace306a10d9b02ee553d454c8e1cf8d3c9b932e137738a6b15b90253a9bfc10
 F src/dbpage.c 8a01e865bf8bc6d7b1844b4314443a6436c07c3efe1d488ed89e81719047833a
 F src/dbstat.c 3aa79fc3aed7ce906e4ea6c10e85d657299e304f6049861fe300053ac57de36c
@@ -495,7 +495,7 @@ F src/delete.c 927cf8f900583e79aca8f1a321979e0a8f053babd9a690b44b38f79de2cc09fe
 F src/expr.c 0d196ed5a2ebf96be7e8df88add4fabfad0dce16c0fed81a4b8f6a26e259797f
 F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
 F src/fkey.c 83372403298e6a7dd989a47aaacdbaa5b4307b5199dbd56e07d4896066b3de72
-F src/func.c 574f7e5a67e4b7a7855cf3478037717c8f44686c0cd727e1d7f7773414165c03
+F src/func.c d3113a23625daeb54331752421442af772abd851123550459dec96fedbe068e7
 F src/global.c ed55af196a9b66e198aaeda3f5454c3aa7d7d050c6c938181fd044b70d180a81
 F src/hash.c 8d7dda241d0ebdafb6ffdeda3149a412d7df75102cecfc1021c98d6219823b19
 F src/hash.h 9d56a9079d523b648774c1784b74b89bd93fac7b365210157482e4319a468f38
@@ -545,7 +545,7 @@ F src/shell.c.in e9f674ee4ec6c345679e8a5b16c869c6c59eb1540dd98ac69e4736ecddce009
 F src/sqlite.h.in 0e2b4259e49a0eda54d9118eb18a04fcd60e0727a2fd2c81aade0bf57520e706
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 61b38c073d5e1e96a3d45271b257aef27d0d13da2bea5347692ae579475cd95e
-F src/sqliteInt.h c897ea47eb7dfc1b337e2c5681dbf00eb43c2a1af2f0045a19adc1052aadc03d
+F src/sqliteInt.h 6ab40b33a1f5edbb7d71c78e82e0f9c5291dcff4704df8e4f0ab0d9c1a0c06af
 F src/sqliteLimit.h d7323ffea5208c6af2734574bae933ca8ed2ab728083caa117c9738581a31657
 F src/status.c 4b8bc2a6905163a38b739854a35b826c737333fab5b1f8e03fa7eb9a4799c4c1
 F src/table.c 0f141b58a16de7e2fbe81c308379e7279f4c6b50eb08efeec5892794a0ba30d1
@@ -565,7 +565,7 @@ F src/test_backup.c bf5da90c9926df0a4b941f2d92825a01bbe090a0
 F src/test_bestindex.c 78809f11026f18a93fcfd798d9479cba37e1201c830260bf1edc674b2fa9b857
 F src/test_blob.c ae4a0620b478548afb67963095a7417cd06a4ec0a56adb453542203bfdcb31ce
 F src/test_btree.c 8b2dc8b8848cf3a4db93f11578f075e82252a274
-F src/test_config.c 5ea19bf0972a9d91728518b4d30e91477acce80496003ecbef3a7fb18d0bd081
+F src/test_config.c 98698f5242be88af75eaac54adde573471d5ed2f6484e0dac034cb1e763a551a
 F src/test_delete.c e2fe07646dff6300b48d49b2fee2fe192ed389e834dd635e3b3bac0ce0bf9f8f
 F src/test_demovfs.c 86142ba864d4297d54c5b2e972e74f3141ae4b30f05b3a95824184ed2d3d7f91
 F src/test_devsym.c aff2255ea290d7718da08af30cdf18e470ff7325a5eff63e0057b1496ed66593
@@ -1026,6 +1026,7 @@ F test/func3.test 2bb0f31ab7baaed690b962a88544d7be6b34fa389364bc36a44e441ed3e3f1
 F test/func4.test 2285fb5792d593fef442358763f0fd9de806eda47dbc7a5934df57ffdc484c31
 F test/func5.test 863e6d1bd0013d09c17236f8a13ea34008dd857d87d85a13a673960e4c25d82a
 F test/func6.test 90e42b64c4f9fb6f04f44cb8a1da586c8542502e926b19c76504fe74ff2a9b7c
+F test/func7.test 7414f1ffb7aba86b6bcfdf0c3739a4e4717026ff583acd8b43ab21189300bcdc
 F test/fuzz-oss1.test e58330d01cbbd8215ee636b17a03fe220b37dbfa
 F test/fuzz.test 96083052bf5765e4518c1ba686ce2bab785670d1
 F test/fuzz2.test 76dc35b32b6d6f965259508508abce75a6c4d7e1
@@ -1887,7 +1888,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P fd02dffceb0e21cd85c99d5481ab8567110d01c30ea701178547f32299944302
-R d3c2d5d830919ec315662cc1d113703f
+P 1db7c751912beb57a697ac8e85b9c29e30da7b6c89207e9828bf08e56c58242f
+R 6662031cc76e6cb57f52d5a4ee0696ea
 U drh
-Z d16f9ab88139a6919756f891af8788a5
+Z 99632da1aa8e30b2d9d751e33b863567
diff --git a/manifest.uuid b/manifest.uuid
index 9b7ad54cc9..7ffa11f57e 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-1db7c751912beb57a697ac8e85b9c29e30da7b6c89207e9828bf08e56c58242f
\ No newline at end of file
+4db5f2f7875f6df78630a7816fc018141a6eee2e295b44fc7627eb66d07881ea
\ No newline at end of file
diff --git a/src/ctime.c b/src/ctime.c
index e3e1e79a95..f0fdccbdc1 100644
--- a/src/ctime.c
+++ b/src/ctime.c
@@ -259,6 +259,9 @@ static const char * const sqlite3azCompileOpt[] = {
 #ifdef SQLITE_ENABLE_LOCKING_STYLE
   "ENABLE_LOCKING_STYLE=" CTIMEOPT_VAL(SQLITE_ENABLE_LOCKING_STYLE),
 #endif
+#if SQLITE_ENABLE_MATH_FUNCTIONS
+  "ENABLE_MATH_FUNCTIONS"
+#endif
 #if SQLITE_ENABLE_MEMORY_MANAGEMENT
   "ENABLE_MEMORY_MANAGEMENT",
 #endif
diff --git a/src/func.c b/src/func.c
index 5d00c94a92..09e44345dc 100644
--- a/src/func.c
+++ b/src/func.c
@@ -1904,6 +1904,75 @@ int sqlite3IsLikeFunction(sqlite3 *db, Expr *pExpr, int *pIsNocase, char *aWc){
   return 1;
 }
 
+/* Extra math functions that require linking with -lm
+*/
+#ifdef SQLITE_ENABLE_MATH_FUNCTIONS
+/*
+** Implementation SQL functions:
+**
+**   ceil(X)
+**   ceiling(X)
+**   floor(X)
+**
+** The sqlite3_user_data() pointer is a pointer to the libm implementation
+** of the underlying C function.
+*/
+static void ceilingFunc(
+  sqlite3_context *context,
+  int argc,
+  sqlite3_value **argv
+){
+  assert( argc==1 );
+  switch( sqlite3_value_type(argv[0]) ){
+    case SQLITE_INTEGER:
+       sqlite3_result_int64(context, sqlite3_value_int64(argv[0]));
+       break;
+    case SQLITE_NULL:
+       break;
+    default: {
+       double (*x)(double) = (double(*)(double))sqlite3_user_data(context);
+       sqlite3_result_double(context, x(sqlite3_value_double(argv[0])));
+       break;
+    }
+  }
+}
+
+/*
+** Implementation of SQL functions:
+**
+**   ln(X)       - natural logarithm
+**   log(X)      - log base 10
+**   log10(X)    - log base 10
+**   log(X,Y)    - log base Y
+*/
+static void logFunc(
+  sqlite3_context *context,
+  int argc,
+  sqlite3_value **argv
+){
+  double x, y, ans;
+  assert( argc==1 || argc==2 );
+  if( sqlite3_value_type(argv[0])==SQLITE_NULL
+   || (x = sqlite3_value_double(argv[0]))<0.0
+  ){
+    return;  /* Return NULL for a domain error */
+  }
+  ans = log(x);
+  if( argc==2 ){
+    if( sqlite3_value_type(argv[1])==SQLITE_NULL
+     || (y = sqlite3_value_double(argv[1]))<0.0
+    ){
+      return;  /* Return NULL for a domain error */
+    }
+    ans /= log(y);
+  }else if( sqlite3_user_data(context)!=0 ){
+    /* Convert from natural logarithm to log base 10 */
+    ans *= 0.43429448190325178672;
+  }
+  sqlite3_result_double(context, ans);
+}
+#endif /* SQLITE_ENABLE_MATH_FUNCTIONS */
+
 /*
 ** All of the FuncDef structures in the aBuiltinFunc[] array above
 ** to the global function hash table.  This occurs at start-time (as
@@ -2024,6 +2093,15 @@ void sqlite3RegisterBuiltinFunctions(void){
     FUNCTION(coalesce,           0, 0, 0, 0                ),
     INLINE_FUNC(coalesce,       -1, INLINEFUNC_coalesce, 0 ),
     INLINE_FUNC(iif,             3, INLINEFUNC_iif,      0 ),
+#ifdef SQLITE_ENABLE_MATH_FUNCTIONS
+    MFUNCTION(ceil,              1, ceil,      ceilingFunc ),
+    MFUNCTION(ceiling,           1, ceil,      ceilingFunc ),
+    MFUNCTION(floor,             1, floor,     ceilingFunc ),
+    FUNCTION(ln,                 1, 0, 0,      logFunc     ),
+    FUNCTION(log,                1, 1, 0,      logFunc     ),
+    FUNCTION(log10,              1, 1, 0,      logFunc     ),
+    FUNCTION(log,                2, 0, 0,      logFunc     ),
+#endif /* SQLITE_ENABLE_MATH_FUNCTIONS */
   };
 #ifndef SQLITE_OMIT_ALTERTABLE
   sqlite3AlterFunctions();
diff --git a/src/sqliteInt.h b/src/sqliteInt.h
index 1efa621427..438f79c092 100644
--- a/src/sqliteInt.h
+++ b/src/sqliteInt.h
@@ -1864,6 +1864,9 @@ struct FuncDestructor {
 **     a single query.  The iArg is ignored.  The user-data is always set
 **     to a NULL pointer.  The bNC parameter is not used.
 **
+**   MFUNCTION(zName, nArg, xPtr, xFunc)
+**     For math-library functions.  xPtr is an arbitrary pointer.
+**
 **   PURE_DATE(zName, nArg, iArg, bNC, xFunc)
 **     Used for "pure" date/time functions, this macro is like DFUNCTION
 **     except that it does set the SQLITE_FUNC_CONSTANT flags.  iArg is
@@ -1899,6 +1902,9 @@ struct FuncDestructor {
 #define SFUNCTION(zName, nArg, iArg, bNC, xFunc) \
   {nArg, SQLITE_UTF8|SQLITE_DIRECTONLY|SQLITE_FUNC_UNSAFE, \
    SQLITE_INT_TO_PTR(iArg), 0, xFunc, 0, 0, 0, #zName, {0} }
+#define MFUNCTION(zName, nArg, xPtr, xFunc) \
+  {nArg, SQLITE_FUNC_CONSTANT|SQLITE_UTF8, \
+   xPtr, 0, xFunc, 0, 0, 0, #zName, {0} }
 #define INLINE_FUNC(zName, nArg, iArg, mFlags) \
   {nArg, SQLITE_UTF8|SQLITE_FUNC_INLINE|SQLITE_FUNC_CONSTANT|(mFlags), \
    SQLITE_INT_TO_PTR(iArg), 0, noopFunc, 0, 0, 0, #zName, {0} }
diff --git a/src/test_config.c b/src/test_config.c
index 362e92aa9a..8c4fba71db 100644
--- a/src/test_config.c
+++ b/src/test_config.c
@@ -154,6 +154,12 @@ static void set_options(Tcl_Interp *interp){
   Tcl_SetVar2(interp, "sqlite_options", "deserialize", "0", TCL_GLOBAL_ONLY);
 #endif
 
+#ifdef SQLITE_ENABLE_MATH_FUNCTIONS
+  Tcl_SetVar2(interp, "sqlite_options", "mathlib", "1", TCL_GLOBAL_ONLY);
+#else
+  Tcl_SetVar2(interp, "sqlite_options", "mathlib", "0", TCL_GLOBAL_ONLY);
+#endif
+
 #ifdef SQLITE_ENABLE_MEMSYS3
   Tcl_SetVar2(interp, "sqlite_options", "mem3", "1", TCL_GLOBAL_ONLY);
 #else
diff --git a/test/func7.test b/test/func7.test
new file mode 100644
index 0000000000..c7fce79dd6
--- /dev/null
+++ b/test/func7.test
@@ -0,0 +1,35 @@
+# 2020-12-07
+#
+# 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.
+#
+#*************************************************************************
+#
+# Test cases for SQL functions based off the standard math library
+#
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+ifcapable !mathlib {
+  finish_test
+  return
+}
+
+do_execsql_test func7-100 {
+  SELECT ceil(99.9), ceiling(-99.01), floor(17), floor(-17.99);
+} {100.0 -99.0 17 -18.0}
+do_execsql_test func7-110 {
+  SELECT quote(ceil(NULL)), ceil('-99.99');
+} {NULL -99.0}
+do_execsql_test func7-200 {
+  SELECT round(ln(5),2), log(100.0), log(100), log('256',2);
+} {1.61 2.0 2.0 8.0}
+do_execsql_test func7-210 {
+  SELECT ln(-5), log(100.0,-5);
+} {{} {}}
+
+
+finish_test