# This file contains some usefull common functions

 # Copyright 2007 Yann E. MORIN

 # Licensed under the GPL v2. See COPYING in the root of this package

 CT_OnError() {

     ret=$?

     CT_DoLog ERROR "Build failed in step \"${CT_STEP_MESSAGE[${CT_STEP_COUNT}]}\""

     for((step=(CT_STEP_COUNT-1); step>1; step--)); do

         CT_DoLog ERROR "      called in step \"${CT_STEP_MESSAGE[${step}]}\""

     done

     CT_DoLog ERROR "Error happened in \"${BASH_SOURCE[1]}\" in function \"${FUNCNAME[1]}\" (line unknown, sorry)"

     for((depth=2; ${BASH_LINENO[$((${depth}-1))]}>0; depth++)); do

         CT_DoLog ERROR "      called from \"${BASH_SOURCE[${depth}]}\" at line # ${BASH_LINENO[${depth}-1]} in function \"${FUNCNAME[${depth}]}\""

     done

     CT_DoLog ERROR "Look at \"${CT_ACTUAL_LOG_FILE}\" for more info on this error."

     CT_STEP_COUNT=1

     CT_DoEnd ERROR

     exit $ret

 }

 trap CT_OnError ERR

 set -E

 set -o pipefail

 # The different log levels:

 CT_LOG_LEVEL_ERROR=0

 CT_LOG_LEVEL_WARN=1

 CT_LOG_LEVEL_INFO=2

 CT_LOG_LEVEL_EXTRA=3

 CT_LOG_LEVEL_DEBUG=4

 CT_LOG_LEVEL_ALL=5

 # A function to log what is happening

 # Different log level are available:

 #   - ERROR:   A serious, fatal error occurred

 #   - WARN:    A non fatal, non serious error occurred, take your responsbility with the generated build

 #   - INFO:    Informational messages

 #   - EXTRA:   Extra informational messages

 #   - DEBUG:   Debug messages

 #   - ALL:     Component's build messages

 # Usage: CT_DoLog <level> [message]

 # If message is empty, then stdin will be logged.

 CT_DoLog() {

     local max_level LEVEL level cur_l cur_L

     local l

     eval max_level="\${CT_LOG_LEVEL_${CT_LOG_LEVEL_MAX}}"

     # Set the maximum log level to DEBUG if we have none

     [ -z "${max_level}" ] && max_level=${CT_LOG_LEVEL_DEBUG}

     LEVEL="$1"; shift

     eval level="\${CT_LOG_LEVEL_${LEVEL}}"

     if [ $# -eq 0 ]; then

         cat -

     else

         echo "${1}"

     fi |( IFS="\n" # We want the full lines, even leading spaces

           CT_PROG_BAR_CPT=0

           indent=$((2*CT_STEP_COUNT))

           while read line; do

               case "${CT_LOG_SEE_TOOLS_WARN},${line}" in

                 y,*"warning:"*)         cur_L=WARN; cur_l=${CT_LOG_LEVEL_WARN};;

                 *"error:"*)             cur_L=ERROR; cur_l=${CT_LOG_LEVEL_ERROR};;

                 *"make["?*"]:"*"Stop.") cur_L=ERROR; cur_l=${CT_LOG_LEVEL_ERROR};;

                 *)                      cur_L="${LEVEL}"; cur_l="${level}";;

               esac

               l="`printf \"[%-5s]%*s%s%s\" \"${cur_L}\" \"${indent}\" \" \" \"${line}\"`"

               # There will always be a log file, be it /dev/null

               echo -e "${l}" >>"${CT_ACTUAL_LOG_FILE}"

               if [ ${cur_l} -le ${max_level} ]; then

                   echo -e "\r${l}"

               fi

               if [ "${CT_LOG_PROGRESS_BAR}" = "y" ]; then

                   str=`CT_DoDate +%s`

                   elapsed=$((str-(CT_STAR_DATE/(1000*1000*1000))))

                   [ ${CT_PROG_BAR_CPT} -eq 0  ] && bar="/"

                   [ ${CT_PROG_BAR_CPT} -eq 10 ] && bar="-"

                   [ ${CT_PROG_BAR_CPT} -eq 20 ] && bar="\\"

                   [ ${CT_PROG_BAR_CPT} -eq 30 ] && bar="|"

                   printf "\r[%02d:%02d] %s " $((elapsed/60)) $((elapsed%60)) "${bar}"

                   CT_PROG_BAR_CPT=$(((CT_PROG_BAR_CPT+1)%40))

               fi

           done

         )

     return 0

 }

 # Tail message to be logged whatever happens

 # Usage: CT_DoEnd <level>

 CT_DoEnd()

 {

     CT_STOP_DATE=`CT_DoDate +%s%N`

     CT_STOP_DATE_HUMAN=`CT_DoDate +%Y%m%d.%H%M%S`

     CT_DoLog INFO "Build completed at ${CT_STOP_DATE_HUMAN}"

     elapsed=$((CT_STOP_DATE-CT_STAR_DATE))

     elapsed_min=$((elapsed/(60*1000*1000*1000)))

     elapsed_sec=`printf "%02d" $(((elapsed%(60*1000*1000*1000))/(1000*1000*1000)))`

     elapsed_csec=`printf "%02d" $(((elapsed%(1000*1000*1000))/(10*1000*1000)))`

     CT_DoLog ${1:-INFO} "(elapsed: ${elapsed_min}:${elapsed_sec}.${elapsed_csec})"

 }

 # Abort the execution with an error message

 # Usage: CT_Abort <message>

 CT_Abort() {

     CT_DoLog ERROR "$1" >&2

     exit 1

 }

 # Test a condition, and print a message if satisfied

 # Usage: CT_Test <message> <tests>

 CT_Test() {

     local ret

     local m="$1"

     shift

     test "$@" && CT_DoLog WARN "$m"

     return 0

 }

 # Test a condition, and abort with an error message if satisfied

 # Usage: CT_TestAndAbort <message> <tests>

 CT_TestAndAbort() {

     local m="$1"

     shift

     test "$@" && CT_Abort "$m"

     return 0

 }

 # Test a condition, and abort with an error message if not satisfied

 # Usage: CT_TestAndAbort <message> <tests>

 CT_TestOrAbort() {

     local m="$1"

     shift

     test "$@" || CT_Abort "$m"

     return 0

 }

 # Test the presence of a tool, or abort if not found

 # Usage: CT_HasOrAbort <tool>

 CT_HasOrAbort() {

     CT_TestAndAbort "\"${1}\" not found and needed for successfull toolchain build." -z "`which \"${1}\"`"

     return 0

 }

 # Get current date with nanosecond precision

 # On those system not supporting nanosecond precision, faked with rounding down

 # to the highest entire second

 # Usage: CT_DoDate <fmt>

 CT_DoDate() {

     date "$1" |sed -r -e 's/%N$/000000000/;'

 }

 CT_STEP_COUNT=1

 CT_STEP_MESSAGE[${CT_STEP_COUNT}]="<none>"

 # Memorise a step being done so that any error is caught

 # Usage: CT_DoStep <loglevel> <message>

 CT_DoStep() {

     local start=`CT_DoDate +%s%N`

     CT_DoLog "$1" "================================================================="

     CT_DoLog "$1" "$2"

     CT_STEP_COUNT=$((CT_STEP_COUNT+1))

     CT_STEP_LEVEL[${CT_STEP_COUNT}]="$1"; shift

     CT_STEP_START[${CT_STEP_COUNT}]="${start}"

     CT_STEP_MESSAGE[${CT_STEP_COUNT}]="$1"

     return 0

 }

 # End the step just being done

 # Usage: CT_EndStep

 CT_EndStep() {

     local stop=`CT_DoDate +%s%N`

     local duration=`printf "%032d" $((stop-${CT_STEP_START[${CT_STEP_COUNT}]})) |sed -r -e 's/([[:digit:]]{2})[[:digit:]]{7}$/\.\1/; s/^0+//; s/^\./0\./;'`

     local level="${CT_STEP_LEVEL[${CT_STEP_COUNT}]}"

     local message="${CT_STEP_MESSAGE[${CT_STEP_COUNT}]}"

     CT_STEP_COUNT=$((CT_STEP_COUNT-1))

     CT_DoLog "${level}" "${message}: done in ${duration}s"

     return 0

 }

 # Pushes into a directory, and pops back

 CT_Pushd() {

     pushd "$1" >/dev/null 2>&1

 }

 CT_Popd() {

     popd >/dev/null 2>&1

 }

 # Makes a path absolute

 # Usage: CT_MakeAbsolutePath path

 CT_MakeAbsolutePath() {

     # Try to cd in that directory

     if [ -d "$1" ]; then

         CT_Pushd "$1"

         pwd

         CT_Popd

     else

         # No such directory, fail back to guessing

         case "$1" in

             /*)  echo "$1";;

             *)   echo "`pwd`/$1";;

         esac

     fi

     return 0

 }

 # Creates a temporary directory

 # $1: variable to assign to

 # Usage: CT_MktempDir foo

 CT_MktempDir() {

     # Some mktemp do not allow more than 6 Xs

     eval "$1"="`mktemp -q -d \"${CT_BUILD_DIR}/.XXXXXX\"`"

     CT_TestOrAbort "Could not make temporary directory" -n "${!1}" -a -d "${!1}"

 }

 # Echoes the specified string on stdout until the pipe breaks.

 # Doesn't fail

 # $1: string to echo

 # Usage: CT_DoYes "" |make oldconfig

 CT_DoYes() {

     yes "$1" || true

 }

 # Get the file name extension of a component

 # Usage: CT_GetFileExtension <component_name-component_version>

 # If found, echoes the extension to stdout

 # If not found, echoes nothing on stdout.

 CT_GetFileExtension() {

     local ext

     local file="$1"

     local got_it=1

     CT_Pushd "${CT_TARBALLS_DIR}"

     for ext in .tar.gz .tar.bz2 .tgz .tar; do

         if [ -f "${file}${ext}" ]; then

             echo "${ext}"

             got_it=0

             break

         fi

     done

     CT_Popd

     return 0

 }

 # Download an URL using wget

 # Usage: CT_DoGetFileWget <URL>

 CT_DoGetFileWget() {

     # Need to return true because it is legitimate to not find the tarball at

     # some of the provided URLs (think about snapshots, different layouts for

     # different gcc versions, etc...)

     # Some (very old!) FTP server might not support the passive mode, thus

     # retry without

     # With automated download as we are doing, it can be very dangerous to use

     # -c to continue the downloads. It's far better to simply overwrite the

     # destination file

     wget -nc --progress=dot:binary --tries=3 --passive-ftp "$1" || wget -nc --progress=dot:binary --tries=3 "$1" || true

 }

 # Download an URL using curl

 # Usage: CT_DoGetFileCurl <URL>

 CT_DoGetFileCurl() {

 	# Note: comments about wget method are also valid here

 	# Plus: no good progreess indicator is available with curl,

 	#       so output is consigned to oblivion

 	curl --ftp-pasv -O --retry 3 "$1" >/dev/null || curl -O --retry 3 "$1" >/dev/null || true

 }

 # Wrapper function to call one of curl or wget

 # Usage: CT_DoGetFile <URL>

 CT_DoGetFile() {

     local _wget=`which wget`

     local _curl=`which curl`

     case "${_wget},${_curl}" in

         ,)  CT_DoError "Could find neither wget nor curl";;

         ,*) CT_DoGetFileCurl "$1" 2>&1 |CT_DoLog DEBUG;;

         *)  CT_DoGetFileWget "$1" 2>&1 |CT_DoLog DEBUG;;

     esac

 }

 # Download the file from one of the URLs passed as argument

 # Usage: CT_GetFile <filename> <url> [<url> ...]

 CT_GetFile() {

     local got_it

     local ext

     local url

     local file="$1"

     shift

     # Do we already have it?

     ext=`CT_GetFileExtension "${file}"`

     if [ -n "${ext}" ]; then

         CT_DoLog DEBUG "Already have \"${file}\""

         return 0

     fi

     CT_DoLog EXTRA "Retrieving \"${file}\""

     CT_Pushd "${CT_TARBALLS_DIR}"

     # File not yet downloaded, try to get it

     got_it=0

     # We'd rather have a bzip2'ed tarball, then gzipped, and finally plain tar.

     # Try local copy first, if it exists

     for ext in .tar.bz2 .tar.gz .tgz .tar; do

         if [ -r "${CT_LOCAL_TARBALLS_DIR}/${file}${ext}" -a \

              "${CT_FORCE_DOWNLOAD}" != "y" ]; then

             cp -v "${CT_LOCAL_TARBALLS_DIR}/${file}${ext}" "${file}${ext}" |CT_DoLog DEBUG

             return 0

         fi

     done

     # Try to download it

     for ext in .tar.bz2 .tar.gz .tgz .tar; do

         # Try all urls in turn

         for url in "$@"; do

             case "${url}" in

                 *)  CT_DoLog DEBUG "Trying \"${url}/${file}${ext}\""

                     CT_DoGetFile "${url}/${file}${ext}"

                     ;;

             esac

             [ -f "${file}${ext}" ] && return 0 || true

         done

     done

     CT_Popd

     CT_Abort "Could not download \"${file}\", and not present in \"${CT_LOCAL_TARBALLS_DIR}\""

 }

 # Extract a tarball and patch the resulting sources if necessary.

 # Some tarballs need to be extracted in specific places. Eg.: glibc addons

 # must be extracted in the glibc directory; uCLibc locales must be extracted

 # in the extra/locale sub-directory of uClibc.

 CT_ExtractAndPatch() {

     local file="$1"

     local base_file=`echo "${file}" |cut -d - -f 1`

     local ver_file=`echo "${file}" |cut -d - -f 2-`

     local official_patch_dir

     local custom_patch_dir

     local libc_addon

     local ext=`CT_GetFileExtension "${file}"`

     CT_TestAndAbort "\"${file}\" not found in \"${CT_TARBALLS_DIR}\"" -z "${ext}"

     local full_file="${CT_TARBALLS_DIR}/${file}${ext}"

     CT_Pushd "${CT_SRC_DIR}"

     # Add-ons need a little love, really.

     case "${file}" in

         glibc-[a-z]*-*)

             CT_TestAndAbort "Trying to extract the C-library addon/locales \"${file}\" when C-library not yet extracted" ! -d "${CT_LIBC_FILE}"

             cd "${CT_LIBC_FILE}"

             libc_addon=y

             [ -f ".${file}.extracted" ] && return 0

             touch ".${file}.extracted"

             ;;

         uClibc-locale-*)

             CT_TestAndAbort "Trying to extract the C-library addon/locales \"${file}\" when C-library not yet extracted" ! -d "${CT_LIBC_FILE}"

             cd "${CT_LIBC_FILE}/extra/locale"

             libc_addon=y

             [ -f ".${file}.extracted" ] && return 0

             touch ".${file}.extracted"

             ;;

     esac

     # If the directory exists, then consider extraction and patching done

     if [ -d "${file}" ]; then

         CT_DoLog DEBUG "Already extracted \"${file}\""

         return 0

     fi

     CT_DoLog EXTRA "Extracting \"${file}\""

     case "${ext}" in

         .tar.bz2)     tar xvjf "${full_file}" |CT_DoLog ALL;;

         .tar.gz|.tgz) tar xvzf "${full_file}" |CT_DoLog ALL;;

         .tar)         tar xvf  "${full_file}" |CT_DoLog ALL;;

         *)            CT_Abort "Don't know how to handle \"${file}\": unknown extension" ;;

     esac

     # Snapshots might not have the version number in the extracted directory

     # name. This is also the case for some (old) packages, such as libfloat.

     # Overcome this issue by symlink'ing the directory.

     if [ ! -d "${file}" -a "${libc_addon}" != "y" ]; then

         case "${ext}" in

             .tar.bz2)     base=`tar tjf "${full_file}" |head -n 1 |cut -d / -f 1 || true`;;

             .tar.gz|.tgz) base=`tar tzf "${full_file}" |head -n 1 |cut -d / -f 1 || true`;;

             .tar)         base=`tar tf  "${full_file}" |head -n 1 |cut -d / -f 1 || true`;;

         esac

         CT_TestOrAbort "There was a problem when extracting \"${file}\"" -d "${base}" -o "${base}" != "${file}"

         ln -s "${base}" "${file}"

     fi

     # Kludge: outside this function, we wouldn't know if we had just extracted

     # a libc addon, or a plain package. Apply patches now.

     CT_DoLog EXTRA "Patching \"${file}\""

     # If libc addon, we're already in the correct place.

     [ -z "${libc_addon}" ] && cd "${file}"

     [ "${CUSTOM_PATCH_ONLY}" = "y" ] || official_patch_dir="${CT_TOP_DIR}/patches/${base_file}/${ver_file}"

     [ "${CT_CUSTOM_PATCH}" = "y" ] && custom_patch_dir="${CT_CUSTOM_PATCH_DIR}/${base_file}/${ver_file}"

     for patch_dir in "${official_patch_dir}" "${custom_patch_dir}"; do

         if [ -n "${patch_dir}" -a -d "${patch_dir}" ]; then

             for p in "${patch_dir}"/*.patch; do

                 if [ -f "${p}" ]; then

                     CT_DoLog DEBUG "Applying patch \"${p}\""

                     patch -g0 -F1 -p1 -f <"${p}" |CT_DoLog ALL

                     CT_TestAndAbort "Failed while applying patch file \"${p}\"" ${PIPESTATUS[0]} -ne 0

                 fi

             done

         fi

     done

     CT_Popd

 }

 # Compute the target triplet from what is provided by the user

 # Usage: CT_DoBuildTargetTriplet

 # In fact this function takes the environment variables to build the target

 # triplet. It is needed both by the normal build sequence, as well as the

 # sample saving sequence.

 CT_DoBuildTargetTriplet() {

     case "${CT_ARCH_BE},${CT_ARCH_LE}" in

         y,) target_endian_eb=eb; target_endian_el=;;

         ,y) target_endian_eb=; target_endian_el=el;;

     esac

     case "${CT_ARCH}" in

         arm)  CT_TARGET="${CT_ARCH}${target_endian_eb}";;

         mips) CT_TARGET="${CT_ARCH}${target_endian_el}";;

         x86*) # Much love for this one :-(

               # Ultimately, we should use config.sub to output the correct

               # procesor name. Work for later...

               arch="${CT_ARCH_ARCH}"

               [ -z "${arch}" ] && arch="${CT_ARCH_TUNE}"

               case "${CT_ARCH}" in

                   x86_64)      CT_TARGET=x86_64;;

               	  *)  case "${arch}" in

                           "")                                       CT_TARGET=i386;;

                           i386|i486|i586|i686)                      CT_TARGET="${arch}";;

                           winchip*)                                 CT_TARGET=i486;;

                           pentium|pentium-mmx|c3*)                  CT_TARGET=i586;;

                           nocona|athlon*64|k8|athlon-fx|opteron)    CT_TARGET=x86_64;;

                           pentiumpro|pentium*|athlon*)              CT_TARGET=i686;;

                           *)                                        CT_TARGET=i586;;

                       esac;;

               esac;;

     esac

     case "${CT_TARGET_VENDOR}" in

         "") CT_TARGET="${CT_TARGET}-unknown";;

         *)  CT_TARGET="${CT_TARGET}-${CT_TARGET_VENDOR}";;

     esac

     case "${CT_KERNEL}" in

         linux*)  CT_TARGET="${CT_TARGET}-linux";;

         cygwin*) CT_TARGET="${CT_TARGET}-cygwin";;

     esac

     case "${CT_LIBC}" in

         glibc)  CT_TARGET="${CT_TARGET}-gnu";;

         uClibc) CT_TARGET="${CT_TARGET}-uclibc";;

     esac

     case "${CT_ARCH_ABI}" in

         eabi)   CT_TARGET="${CT_TARGET}eabi";;

     esac

     CT_TARGET="`${CT_TOP_DIR}/tools/config.sub ${CT_TARGET}`"

 }