# ---------------------------------------------------------------------------- # # GNU Make Standard Library (GMSL) # # A library of functions to be used with GNU Make's $(call) that # provides functionality not available in standard GNU Make. # # Copyright (c) 2005-2007 John Graham-Cumming # # This file is part of GMSL # # Redistribution and use in source and binary forms, with or without # modification, are permitted provided that the following conditions # are met: # # Redistributions of source code must retain the above copyright # notice, this list of conditions and the following disclaimer. # # Redistributions in binary form must reproduce the above copyright # notice, this list of conditions and the following disclaimer in the # documentation and/or other materials provided with the distribution. # # Neither the name of the John Graham-Cumming nor the names of its # contributors may be used to endorse or promote products derived from # this software without specific prior written permission. # # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS # FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE # COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, # INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, # BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; # LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER # CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT # LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN # ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE # POSSIBILITY OF SUCH DAMAGE. # # ---------------------------------------------------------------------------- # This is the GNU Make Standard Library version number as a list with # three items: major, minor, revision gmsl_version := 1 0 9 # Used to output warnings and error from the library, it's possible to # disable any warnings or errors by overriding these definitions # manually or by setting GMSL_NO_WARNINGS or GMSL_NO_ERRORS __gmsl_name := GNU Make Standard Library __gmsl_warning = $(warning $(__gmsl_name): $1) __gmsl_error = $(error $(__gmsl_name): $1) ifdef GMSL_NO_WARNINGS __gmsl_warning := endif ifdef GMSL_NO_ERRORS __gmsl_error := endif # If GMSL_TRACE is enabled then calls to the library functions are # traced to stdout using warning messages with their arguments ifdef GMSL_TRACE __gmsl_tr1 = $(warning $0('$1')) __gmsl_tr2 = $(warning $0('$1','$2')) __gmsl_tr3 = $(warning $0('$1','$2','$3')) else __gmsl_tr1 := __gmsl_tr2 := __gmsl_tr3 := endif # Figure out whether we have $(eval) or not (GNU Make 3.80 and above) # if we do not then output a warning message, if we do then some # functions will be enabled. __gmsl_have_eval := $(false) __gmsl_ignore := $(eval __gmsl_have_eval := $(true)) # See if we have $(lastword) (GNU Make 3.81 and above) __gmsl_have_lastword := $(lastword $(false) $(true)) # See if we have native or and and (GNU Make 3.81 and above) __gmsl_have_or := $(if $(filter-out undefined, \ $(origin or)),$(call or,$(true),$(false))) __gmsl_have_and := $(if $(filter-out undefined, \ $(origin and)),$(call and,$(true),$(true))) ifneq ($(__gmsl_have_eval),$(true)) $(call __gmsl_warning,GNU Make $(MAKE_VERSION) does not support $$(eval): some functions disabled) endif # ---------------------------------------------------------------------------- # Function: gmsl_compatible # Arguments: List containing the desired library version number (maj min rev) # Returns: $(true) if this version of the library is compatible # with the requested version number, otherwise $(false) # ---------------------------------------------------------------------------- gmsl_compatible = $(strip \ $(if $(call gt,$(word 1,$1),$(word 1,$(gmsl_version))), \ $(false), \ $(if $(call lt,$(word 1,$1),$(word 1,$(gmsl_version))), \ $(true), \ $(if $(call gt,$(word 2,$1),$(word 2,$(gmsl_version))), \ $(false), \ $(if $(call lt,$(word 2,$1),$(word 2,$(gmsl_version))), \ $(true), \ $(call lte,$(word 3,$1),$(word 3,$(gmsl_version)))))))) # ########################################################################### # LOGICAL OPERATORS # ########################################################################### # not is defined in gmsl # ---------------------------------------------------------------------------- # Function: and # Arguments: Two boolean values # Returns: Returns $(true) if both of the booleans are true # ---------------------------------------------------------------------------- ifneq ($(__gmsl_have_and),$(true)) and = $(__gmsl_tr2)$(if $1,$(if $2,$(true),$(false)),$(false)) endif # ---------------------------------------------------------------------------- # Function: or # Arguments: Two boolean values # Returns: Returns $(true) if either of the booleans is true # ---------------------------------------------------------------------------- ifneq ($(__gmsl_have_or),$(true)) or = $(__gmsl_tr2)$(if $1$2,$(true),$(false)) endif # ---------------------------------------------------------------------------- # Function: xor # Arguments: Two boolean values # Returns: Returns $(true) if exactly one of the booleans is true # ---------------------------------------------------------------------------- xor = $(__gmsl_tr2)$(if $1,$(if $2,$(false),$(true)),$(if $2,$(true),$(false))) # ---------------------------------------------------------------------------- # Function: nand # Arguments: Two boolean values # Returns: Returns value of 'not and' # ---------------------------------------------------------------------------- nand = $(__gmsl_tr2)$(if $1,$(if $2,$(false),$(true)),$(true)) # ---------------------------------------------------------------------------- # Function: nor # Arguments: Two boolean values # Returns: Returns value of 'not or' # ---------------------------------------------------------------------------- nor = $(__gmsl_tr2)$(if $1$2,$(false),$(true)) # ---------------------------------------------------------------------------- # Function: xnor # Arguments: Two boolean values # Returns: Returns value of 'not xor' # ---------------------------------------------------------------------------- xnor =$(__gmsl_tr2)$(if $1,$(if $2,$(true),$(false)),$(if $2,$(false),$(true))) # ########################################################################### # LIST MANIPULATION FUNCTIONS # ########################################################################### # ---------------------------------------------------------------------------- # Function: first (same as LISP's car, or head) # Arguments: 1: A list # Returns: Returns the first element of a list # ---------------------------------------------------------------------------- first = $(__gmsl_tr1)$(firstword $1) # ---------------------------------------------------------------------------- # Function: last # Arguments: 1: A list # Returns: Returns the last element of a list # ---------------------------------------------------------------------------- ifeq ($(__gmsl_have_lastword),$(true)) last = $(__gmsl_tr1)$(lastword $1) else last = $(__gmsl_tr1)$(if $1,$(word $(words $1),$1)) endif # ---------------------------------------------------------------------------- # Function: rest (same as LISP's cdr, or tail) # Arguments: 1: A list # Returns: Returns the list with the first element removed # ---------------------------------------------------------------------------- rest = $(__gmsl_tr1)$(wordlist 2,$(words $1),$1) # ---------------------------------------------------------------------------- # Function: chop # Arguments: 1: A list # Returns: Returns the list with the last element removed # ---------------------------------------------------------------------------- chop = $(__gmsl_tr1)$(wordlist 2,$(words $1),x $1) # ---------------------------------------------------------------------------- # Function: map # Arguments: 1: Name of function to $(call) for each element of list # 2: List to iterate over calling the function in 1 # Returns: The list after calling the function on each element # ---------------------------------------------------------------------------- map = $(__gmsl_tr2)$(strip $(foreach a,$2,$(call $1,$a))) # ---------------------------------------------------------------------------- # Function: pairmap # Arguments: 1: Name of function to $(call) for each pair of elements # 2: List to iterate over calling the function in 1 # 3: Second list to iterate over calling the function in 1 # Returns: The list after calling the function on each pair of elements # ---------------------------------------------------------------------------- pairmap = $(strip $(__gmsl_tr3)\ $(if $2$3,$(call $1,$(call first,$2),$(call first,$3)) \ $(call pairmap,$1,$(call rest,$2),$(call rest,$3)))) # ---------------------------------------------------------------------------- # Function: leq # Arguments: 1: A list to compare against... # 2: ...this list # Returns: Returns $(true) if the two lists are identical # ---------------------------------------------------------------------------- leq = $(__gmsl_tr2)$(strip $(if $(call seq,$(words $1),$(words $2)), \ $(call __gmsl_list_equal,$1,$2),$(false))) __gmsl_list_equal = $(if $(strip $1), \ $(if $(call seq,$(call first,$1),$(call first,$2)), \ $(call __gmsl_list_equal, \ $(call rest,$1), \ $(call rest,$2)), \ $(false)), \ $(true)) # ---------------------------------------------------------------------------- # Function: lne # Arguments: 1: A list to compare against... # 2: ...this list # Returns: Returns $(true) if the two lists are different # ---------------------------------------------------------------------------- lne = $(__gmsl_tr2)$(call not,$(call leq,$1,$2)) # ---------------------------------------------------------------------------- # Function: reverse # Arguments: 1: A list to reverse # Returns: The list with its elements in reverse order # ---------------------------------------------------------------------------- reverse =$(__gmsl_tr1)$(strip $(if $1,$(call reverse,$(call rest,$1)) \ $(call first,$1))) # ---------------------------------------------------------------------------- # Function: uniq # Arguments: 1: A list from which to remove repeated elements # Returns: The list with duplicate elements removed without reordering # ---------------------------------------------------------------------------- uniq = $(strip $(__gmsl_tr1)$(if $1,$(call uniq,$(call chop,$1)) \ $(if $(filter $(call last,$1),$(call chop,$1)),,$(call last,$1)))) # ---------------------------------------------------------------------------- # Function: length # Arguments: 1: A list # Returns: The number of elements in the list # ---------------------------------------------------------------------------- length = $(__gmsl_tr1)$(words $1) # ########################################################################### # STRING MANIPULATION FUNCTIONS # ########################################################################### # Helper function that translates any GNU Make 'true' value (i.e. a # non-empty string) to our $(true) __gmsl_make_bool = $(if $(strip $1),$(true),$(false)) # ---------------------------------------------------------------------------- # Function: seq # Arguments: 1: A string to compare against... # 2: ...this string # Returns: Returns $(true) if the two strings are identical # ---------------------------------------------------------------------------- seq = $(__gmsl_tr2)$(if $(filter-out xx,x$(subst $1,,$2)$(subst $2,,$1)x),$(false),$(true)) # ---------------------------------------------------------------------------- # Function: sne # Arguments: 1: A string to compare against... # 2: ...this string # Returns: Returns $(true) if the two strings are not the same # ---------------------------------------------------------------------------- sne = $(__gmsl_tr2)$(call not,$(call seq,$1,$2)) # ---------------------------------------------------------------------------- # Function: split # Arguments: 1: The character to split on # 2: A string to split # Returns: Splits a string into a list separated by spaces at the split # character in the first argument # ---------------------------------------------------------------------------- split = $(__gmsl_tr2)$(strip $(subst $1, ,$2)) # ---------------------------------------------------------------------------- # Function: merge # Arguments: 1: The character to put between fields # 2: A list to merge into a string # Returns: Merges a list into a single string, list elements are separated # by the character in the first argument # ---------------------------------------------------------------------------- merge = $(__gmsl_tr2)$(strip $(if $2, \ $(if $(call seq,1,$(words $2)), \ $2,$(call first,$2)$1$(call merge,$1,$(call rest,$2))))) ifdef __gmsl_have_eval # ---------------------------------------------------------------------------- # Function: tr # Arguments: 1: The list of characters to translate from # 2: The list of characters to translate to # 3: The text to translate # Returns: Returns the text after translating characters # ---------------------------------------------------------------------------- tr = $(__gmsl_tr3)$(strip $(eval __gmsl_t := $3) \ $(foreach c, \ $(join $(addsuffix :,$1),$2), \ $(eval __gmsl_t := \ $(subst $(word 1,$(subst :, ,$c)),$(word 2,$(subst :, ,$c)), \ $(__gmsl_t))))$(__gmsl_t)) # Common character classes for use with the tr function. Each of # these is actually a variable declaration and must be wrapped with # $() or ${} to be used. [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 # [A-F] := A B C D E F # # ---------------------------------------------------------------------------- # Function: uc # Arguments: 1: Text to upper case # Returns: Returns the text in upper case # ---------------------------------------------------------------------------- uc = $(__gmsl_tr1)$(call tr,$([a-z]),$([A-Z]),$1) # ---------------------------------------------------------------------------- # Function: lc # Arguments: 1: Text to lower case # Returns: Returns the text in lower case # ---------------------------------------------------------------------------- lc = $(__gmsl_tr1)$(call tr,$([A-Z]),$([a-z]),$1) # ---------------------------------------------------------------------------- # Function: strlen # Arguments: 1: A string # Returns: Returns the length of the string # ---------------------------------------------------------------------------- __gmsl_characters := 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 __gmsl_characters += a b c d e f g h i j k l m n o p q r s t u v w y z __gmsl_characters += 0 1 2 3 4 5 6 7 8 9 __gmsl_characters += ` ~ ! @ \# $$ % ^ & * ( ) - _ = + __gmsl_characters += { } [ ] \ : ; ' " < > , . / ? | # Aside: if you read the above you might think that the lower-case # letter x is missing, and that that's an error. It is missing, but # it's not an error. __gmsl_characters is used by the strlen # function. strlen works by transforming every character and space # into the letter x and then counting the x's. Since there's no need # to transform x into x I omitted it. # This results in __gmsl_space containing just a space __gmsl_space := __gmsl_space += strlen = $(strip $(eval __temp := $(subst $(__gmsl_space),x,$1))$(foreach a,$(__gmsl_characters),$(eval __temp := $$(subst $$a,x,$(__temp))))$(eval __temp := $(subst x,x ,$(__temp)))$(words $(__temp))) # This results in __gmsl_newline containing just a newline define __gmsl_newline endef # This results in __gmsl_tab containing a tab __gmsl_tab := # # ---------------------------------------------------------------------------- # Function: substr # Arguments: 1: A string # 2: Start position (first character is 1) # 3: End position (inclusive) # Returns: A substring. # Note: The string in $1 must not contain a § # ---------------------------------------------------------------------------- substr = $(strip $(eval __temp := $$(subst $$(__gmsl_space),§ ,$$1))$(foreach a,$(__gmsl_characters),$(eval __temp := $$(subst $$a,$$a$$(__gmsl_space),$(__temp))))$(eval __temp := $(wordlist $2,$3,$(__temp))))$(subst §,$(__gmsl_space),$(subst $(__gmsl_space),,$(__temp))) endif # __gmsl_have_eval # ########################################################################### # SET MANIPULATION FUNCTIONS # ########################################################################### # Sets are represented by sorted, deduplicated lists. To create a set # from a list use set_create, or start with the empty_set and # set_insert individual elements # This is the empty set empty_set := # ---------------------------------------------------------------------------- # Function: set_create # Arguments: 1: A list of set elements # Returns: Returns the newly created set # ---------------------------------------------------------------------------- set_create = $(__gmsl_tr1)$(sort $1) # ---------------------------------------------------------------------------- # Function: set_insert # Arguments: 1: A single element to add to a set # 2: A set # Returns: Returns the set with the element added # ---------------------------------------------------------------------------- set_insert = $(__gmsl_tr2)$(sort $1 $2) # ---------------------------------------------------------------------------- # Function: set_remove # Arguments: 1: A single element to remove from a set # 2: A set # Returns: Returns the set with the element removed # ---------------------------------------------------------------------------- set_remove = $(__gmsl_tr2)$(filter-out $1,$2) # ---------------------------------------------------------------------------- # Function: set_is_member # Arguments: 1: A single element # 2: A set # Returns: Returns $(true) if the element is in the set # ---------------------------------------------------------------------------- set_is_member = $(if $(filter $1,$2),$(true),$(false)) # ---------------------------------------------------------------------------- # Function: set_union # Arguments: 1: A set # 2: Another set # Returns: Returns the union of the two sets # ---------------------------------------------------------------------------- set_union = $(sort $1 $2) # ---------------------------------------------------------------------------- # Function: set_intersection # Arguments: 1: A set # 2: Another set # Returns: Returns the intersection of the two sets # ---------------------------------------------------------------------------- set_intersection = $(filter $1,$2) # ---------------------------------------------------------------------------- # Function: set_is_subset # Arguments: 1: A set # 2: Another set # Returns: Returns $(true) if the first set is a subset of the second # ---------------------------------------------------------------------------- set_is_subset = $(call set_equal,$(call set_intersection,$1,$2),$1) # ---------------------------------------------------------------------------- # Function: set_equal # Arguments: 1: A set # 2: Another set # Returns: Returns $(true) if the two sets are identical # ---------------------------------------------------------------------------- set_equal = $(call seq,$1,$2) # ########################################################################### # ARITHMETIC LIBRARY # ########################################################################### # Integers a represented by lists with the equivalent number of x's. # For example the number 4 is x x x x. The maximum integer that the # library can handle as _input_ is __gmsl_input_int which is defined # here as 65536 __gmsl_sixteen := x x x x x x x x x x x x x x x x __gmsl_input_int := $(foreach a,$(__gmsl_sixteen), \ $(foreach b,$(__gmsl_sixteen), \ $(foreach c,$(__gmsl_sixteen), \ $(__gmsl_sixteen))))) # ---------------------------------------------------------------------------- # Function: int_decode # Arguments: 1: A number of x's representation # Returns: Returns the integer for human consumption that is represented # by the string of x's # ---------------------------------------------------------------------------- int_decode = $(__gmsl_tr1)$(words $1) # ---------------------------------------------------------------------------- # Function: int_encode # Arguments: 1: A number in human-readable integer form # Returns: Returns the integer encoded as a string of x's # ---------------------------------------------------------------------------- int_encode = $(__gmsl_tr1)$(wordlist 1,$1,$(__gmsl_input_int)) # The arithmetic library functions come in two forms: one form of each # function takes integers as arguments and the other form takes the # encoded form (x's created by a call to int_encode). For example, # there are two plus functions: # # plus Called with integer arguments and returns an integer # int_plus Called with encoded arguments and returns an encoded result # # plus will be slower than int_plus because its arguments and result # have to be translated between the x's format and integers. If doing # a complex calculation use the int_* forms with a single encoding of # inputs and single decoding of the output. For simple calculations # the direct forms can be used. # Helper function used to wrap an int_* function into a function that # takes a pair of integers, perhaps a function and returns an integer # result __gmsl_int_wrap = $(call int_decode,$(call $1,$(call int_encode,$2),$(call int_encode,$3))) __gmsl_int_wrap1 = $(call int_decode,$(call $1,$(call int_encode,$2))) __gmsl_int_wrap2 = $(call $1,$(call int_encode,$2),$(call int_encode,$3)) # ---------------------------------------------------------------------------- # Function: int_plus # Arguments: 1: A number in x's representation # 2: Another number in x's represntation # Returns: Returns the sum of the two numbers in x's representation # ---------------------------------------------------------------------------- int_plus = $(strip $(__gmsl_tr2)$1 $2) # ---------------------------------------------------------------------------- # Function: plus (wrapped version of int_plus) # Arguments: 1: An integer # 2: Another integer # Returns: Returns the sum of the two integers # ---------------------------------------------------------------------------- plus = $(__gmsl_tr2)$(call __gmsl_int_wrap,int_plus,$1,$2) # ---------------------------------------------------------------------------- # Function: int_subtract # Arguments: 1: A number in x's representation # 2: Another number in x's represntation # Returns: Returns the difference of the two numbers in x's representation, # or outputs an error on a numeric underflow # ---------------------------------------------------------------------------- int_subtract = $(strip $(__gmsl_tr2)$(if $(call int_gte,$1,$2), \ $(filter-out xx,$(join $1,$2)), \ $(call __gmsl_warning,Subtraction underflow))) # ---------------------------------------------------------------------------- # Function: subtract (wrapped version of int_subtract) # Arguments: 1: An integer # 2: Another integer # Returns: Returns the difference of the two integers, # or outputs an error on a numeric underflow # ---------------------------------------------------------------------------- subtract = $(__gmsl_tr2)$(call __gmsl_int_wrap,int_subtract,$1,$2) # ---------------------------------------------------------------------------- # Function: int_multiply # Arguments: 1: A number in x's representation # 2: Another number in x's represntation # Returns: Returns the product of the two numbers in x's representation # ---------------------------------------------------------------------------- int_multiply = $(strip $(__gmsl_tr2)$(foreach a,$1,$2)) # ---------------------------------------------------------------------------- # Function: multiply (wrapped version of int_multiply) # Arguments: 1: An integer # 2: Another integer # Returns: Returns the product of the two integers # ---------------------------------------------------------------------------- multiply = $(__gmsl_tr2)$(call __gmsl_int_wrap,int_multiply,$1,$2) # ---------------------------------------------------------------------------- # Function: int_divide # Arguments: 1: A number in x's representation # 2: Another number in x's represntation # Returns: Returns the result of integer division of argument 1 divided # by argument 2 in x's representation # ---------------------------------------------------------------------------- int_divide = $(__gmsl_tr2)$(strip $(if $2, \ $(if $(call int_gte,$1,$2), \ x $(call int_divide,$(call int_subtract,$1,$2),$2),), \ $(call __gmsl_error,Division by zero))) # ---------------------------------------------------------------------------- # Function: divide (wrapped version of int_divide) # Arguments: 1: An integer # 2: Another integer # Returns: Returns the integer division of the first argument by the second # ---------------------------------------------------------------------------- divide = $(__gmsl_tr2)$(call __gmsl_int_wrap,int_divide,$1,$2) # ---------------------------------------------------------------------------- # Function: int_max, int_min # Arguments: 1: A number in x's representation # 2: Another number in x's represntation # Returns: Returns the maximum or minimum of its arguments in x's # representation # ---------------------------------------------------------------------------- int_max = $(__gmsl_tr2)$(subst xx,x,$(join $1,$2)) int_min = $(__gmsl_tr2)$(subst xx,x,$(filter xx,$(join $1,$2))) # ---------------------------------------------------------------------------- # Function: max, min # Arguments: 1: An integer # 2: Another integer # Returns: Returns the maximum or minimum of its integer arguments # ---------------------------------------------------------------------------- max = $(__gmsl_tr2)$(call __gmsl_int_wrap,int_max,$1,$2) min = $(__gmsl_tr2)$(call __gmsl_int_wrap,int_min,$1,$2) # ---------------------------------------------------------------------------- # Function: int_gt, int_gte, int_lt, int_lte, int_eq, int_ne # Arguments: Two x's representation numbers to be compared # Returns: $(true) or $(false) # # int_gt First argument greater than second argument # int_gte First argument greater than or equal to second argument # int_lt First argument less than second argument # int_lte First argument less than or equal to second argument # int_eq First argument is numerically equal to the second argument # int_ne First argument is not numerically equal to the second argument # ---------------------------------------------------------------------------- int_gt = $(__gmsl_tr2)$(call __gmsl_make_bool, \ $(filter-out $(words $2), \ $(words $(call int_max,$1,$2)))) int_gte = $(__gmsl_tr2)$(call __gmsl_make_bool, \ $(call int_gt,$1,$2)$(call int_eq,$1,$2)) int_lt = $(__gmsl_tr2)$(call __gmsl_make_bool, \ $(filter-out $(words $1), \ $(words $(call int_max,$1,$2)))) int_lte = $(__gmsl_tr2)$(call __gmsl_make_bool, \ $(call int_lt,$1,$2)$(call int_eq,$1,$2)) int_eq = $(__gmsl_tr2)$(call __gmsl_make_bool, \ $(filter $(words $1),$(words $2))) int_ne = $(__gmsl_tr2)$(call __gmsl_make_bool, \ $(filter-out $(words $1),$(words $2))) # ---------------------------------------------------------------------------- # Function: gt, gte, lt, lte, eq, ne # Arguments: Two integers to be compared # Returns: $(true) or $(false) # # gt First argument greater than second argument # gte First argument greater than or equal to second argument # lt First argument less than second argument # lte First argument less than or equal to second argument # eq First argument is numerically equal to the second argument # ne First argument is not numerically equal to the second argument # ---------------------------------------------------------------------------- gt = $(__gmsl_tr2)$(call __gmsl_int_wrap2,int_gt,$1,$2) gte = $(__gmsl_tr2)$(call __gmsl_int_wrap2,int_gte,$1,$2) lt = $(__gmsl_tr2)$(call __gmsl_int_wrap2,int_lt,$1,$2) lte = $(__gmsl_tr2)$(call __gmsl_int_wrap2,int_lte,$1,$2) eq = $(__gmsl_tr2)$(call __gmsl_int_wrap2,int_eq,$1,$2) ne = $(__gmsl_tr2)$(call __gmsl_int_wrap2,int_ne,$1,$2) # increment adds 1 to its argument, decrement subtracts 1. Note that # decrement does not range check and hence will not underflow, but # will incorrectly say that 0 - 1 = 0 # ---------------------------------------------------------------------------- # Function: int_inc # Arguments: 1: A number in x's representation # Returns: The number incremented by 1 in x's representation # ---------------------------------------------------------------------------- int_inc = $(strip $(__gmsl_tr1)$1 x) # ---------------------------------------------------------------------------- # Function: inc # Arguments: 1: An integer # Returns: The argument incremented by 1 # ---------------------------------------------------------------------------- inc = $(__gmsl_tr1)$(call __gmsl_int_wrap1,int_inc,$1) # ---------------------------------------------------------------------------- # Function: int_dec # Arguments: 1: A number in x's representation # Returns: The number decremented by 1 in x's representation # ---------------------------------------------------------------------------- int_dec = $(__gmsl_tr1)$(strip $(if $(call sne,0,$(words $1)), \ $(wordlist 2,$(words $1),$1), \ $(call __gmsl_warning,Decrement underflow))) # ---------------------------------------------------------------------------- # Function: dec # Arguments: 1: An integer # Returns: The argument decremented by 1 # ---------------------------------------------------------------------------- dec = $(__gmsl_tr1)$(call __gmsl_int_wrap1,int_dec,$1) # double doubles its argument, and halve halves it # ---------------------------------------------------------------------------- # Function: int_double # Arguments: 1: A number in x's representation # Returns: The number doubled (i.e. * 2) and returned in x's representation # ---------------------------------------------------------------------------- int_double = $(strip $(__gmsl_tr1)$1 $1) # ---------------------------------------------------------------------------- # Function: double # Arguments: 1: An integer # Returns: The integer times 2 # ---------------------------------------------------------------------------- double = $(__gmsl_tr1)$(call __gmsl_int_wrap1,int_double,$1) # ---------------------------------------------------------------------------- # Function: int_halve # Arguments: 1: A number in x's representation # Returns: The number halved (i.e. / 2) and returned in x's representation # ---------------------------------------------------------------------------- int_halve = $(__gmsl_tr1)$(strip $(subst xx,x,$(filter-out xy x y, \ $(join $1,$(foreach a,$1,y x))))) # ---------------------------------------------------------------------------- # Function: halve # Arguments: 1: An integer # Returns: The integer divided by 2 # ---------------------------------------------------------------------------- halve = $(__gmsl_tr1)$(call __gmsl_int_wrap1,int_halve,$1) ifdef __gmsl_have_eval # ########################################################################### # ASSOCIATIVE ARRAYS # ########################################################################### # ---------------------------------------------------------------------------- # Function: set # Arguments: 1: Name of associative array # 2: The key value to associate # 3: The value associated with the key # Returns: None # ---------------------------------------------------------------------------- set = $(__gmsl_tr3)$(eval __gmsl_aa_$1_$2 = $3) # ---------------------------------------------------------------------------- # Function: get # Arguments: 1: Name of associative array # 2: The key to retrieve # Returns: The value stored in the array for that key # ---------------------------------------------------------------------------- get = $(strip $(__gmsl_tr2)$(if $(filter-out undefined,$(origin __gmsl_aa_$1_$2)), \ $(__gmsl_aa_$1_$2))) # ---------------------------------------------------------------------------- # Function: keys # Arguments: 1: Name of associative array # Returns: Returns a list of all defined keys in the array # ---------------------------------------------------------------------------- keys = $(__gmsl_tr1)$(sort $(patsubst __gmsl_aa_$1_%,%, \ $(filter __gmsl_aa_$1_%,$(.VARIABLES)))) # ---------------------------------------------------------------------------- # Function: defined # Arguments: 1: Name of associative array # 2: The key to test # Returns: Returns true if the key is defined (i.e. not empty) # ---------------------------------------------------------------------------- defined = $(__gmsl_tr2)$(call sne,$(call get,$1,$2),) endif # __gmsl_have_eval ifdef __gmsl_have_eval # ########################################################################### # NAMED STACKS # ########################################################################### # ---------------------------------------------------------------------------- # Function: push # Arguments: 1: Name of stack # 2: Value to push onto the top of the stack (must not contain # a space) # Returns: None # ---------------------------------------------------------------------------- push = $(__gmsl_tr2)$(eval __gmsl_stack_$1 := $2 $(if $(filter-out undefined,\ $(origin __gmsl_stack_$1)),$(__gmsl_stack_$1))) # ---------------------------------------------------------------------------- # Function: pop # Arguments: 1: Name of stack # Returns: Top element from the stack after removing it # ---------------------------------------------------------------------------- pop = $(__gmsl_tr1)$(strip $(if $(filter-out undefined,$(origin __gmsl_stack_$1)), \ $(call first,$(__gmsl_stack_$1)) \ $(eval __gmsl_stack_$1 := $(call rest,$(__gmsl_stack_$1))))) # ---------------------------------------------------------------------------- # Function: peek # Arguments: 1: Name of stack # Returns: Top element from the stack without removing it # ---------------------------------------------------------------------------- peek = $(__gmsl_tr1)$(call first,$(__gmsl_stack_$1)) # ---------------------------------------------------------------------------- # Function: depth # Arguments: 1: Name of stack # Returns: Number of items on the stack # ---------------------------------------------------------------------------- depth = $(__gmsl_tr1)$(words $(__gmsl_stack_$1)) endif # __gmsl_have_eval # ########################################################################### # DEBUGGING FACILITIES # ########################################################################### # ---------------------------------------------------------------------------- # Target: gmsl-print-% # Arguments: The % should be replaced by the name of a variable that you # wish to print out. # Action: Echos the name of the variable that matches the % and its value. # For example, 'make gmsl-print-SHELL' will output the value of # the SHELL variable # ---------------------------------------------------------------------------- gmsl-print-%: ; @echo $* = $($*) # ---------------------------------------------------------------------------- # Function: assert # Arguments: 1: A boolean that must be true or the assertion will fail # 2: The message to print with the assertion # Returns: None # ---------------------------------------------------------------------------- assert = $(if $1,,$(call __gmsl_error,Assertion failure: $2)) # ---------------------------------------------------------------------------- # Function: assert_exists # Arguments: 1: Name of file that must exist, if it is missing an assertion # will be generated # Returns: None # ---------------------------------------------------------------------------- assert_exists = $(call assert,$(wildcard $1),file '$1' missing)