# Makefile
# author: byuu
# license: public domain

[A-Z] = A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
[a-z] = a b c d e f g h i j k l m n o p q r s t u v w x y z
[0-9] = 0 1 2 3 4 5 6 7 8 9
[markup] = ` ~ ! @ \# $$ % ^ & * ( ) - _ = + [ { ] } \ | ; : ' " , < . > / ?
[all] = $([A-Z]) $([a-z]) $([0-9]) $([markup])
[space] :=
[space] +=

#####
# platform detection
#####

ifeq ($(platform),)
  uname := $(shell uname -a)
  ifeq ($(uname),)
    platform := win
    delete = del $(subst /,\,$1)
  else ifneq ($(findstring CYGWIN,$(uname)),)
    platform := win
    delete = del $(subst /,\,$1)
  else ifneq ($(findstring Darwin,$(uname)),)
    platform := osx
    delete = rm -f $1
  else
    platform := x
    delete = rm -f $1
  endif
endif

ifeq ($(compiler),)
  ifeq ($(platform),win)
    compiler := gcc
  else ifeq ($(platform),osx)
    compiler := gcc-mp-4.6
  else
    compiler := gcc-4.6
  endif
endif

c := $(compiler) -std=gnu99
cpp := $(subst cc,++,$(compiler)) -std=gnu++0x

ifeq ($(prefix),)
  prefix := /usr/local
endif

#####
# function rwildcard(directory, pattern)
#####
rwildcard = \
  $(strip \
    $(filter $(if $2,$2,%), \
      $(foreach f, \
        $(wildcard $1*), \
        $(eval t = $(call rwildcard,$f/)) \
        $(if $t,$t,$f) \
      ) \
    ) \
  )

#####
# function strtr(source, from, to)
#####
strtr = \
  $(eval __temp := $1) \
  $(strip \
    $(foreach c, \
      $(join $(addsuffix :,$2),$3), \
      $(eval __temp := \
        $(subst $(word 1,$(subst :, ,$c)),$(word 2,$(subst :, ,$c)),$(__temp)) \
      ) \
    ) \
    $(__temp) \
  )

#####
# function strupper(source)
#####
strupper = $(call strtr,$1,$([a-z]),$([A-Z]))

#####
# function strlower(source)
#####
strlower = $(call strtr,$1,$([A-Z]),$([a-z]))

#####
# function strlen(source)
#####
strlen = \
  $(eval __temp := $(subst $([space]),_,$1)) \
  $(words \
    $(strip \
      $(foreach c, \
        $([all]), \
        $(eval __temp := \
          $(subst $c,$c ,$(__temp)) \
        ) \
      ) \
      $(__temp) \
    ) \
  )

#####
# function streq(source)
#####
streq = $(if $(filter-out xx,x$(subst $1,,$2)$(subst $2,,$1)x),,1)

#####
# function strne(source)
#####
strne = $(if $(filter-out xx,x$(subst $1,,$2)$(subst $2,,$1)x),1,)
