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############################################################################
#
# Name: skstring.icn
#
# Title: Scheme in Icon
#
# Author: Bob Alexander
#
# Date: March 23, 1995
#
# Description: see skeem.icn
#
############################################################################
#
# skeem -- Scheme in Icon
#
# String and character procedures
#
#
# Initialize
#
# List entries are described in skfun.icn.
#
procedure InitString()
DefFunction([
CHAR_2_INTEGER,
CHAR_ALPHABETIC_P,
CHAR_CI_EQ,"twoOrMore","CHAR-CI=?",
CHAR_CI_GE,"twoOrMore","CHAR-CI>=?",
CHAR_CI_GT,"twoOrMore","CHAR-CI>?",
CHAR_CI_LE,"twoOrMore","CHAR-CI<=?",
CHAR_CI_LT,"twoOrMore","CHAR-CI<?",
CHAR_CI_NE,"twoOrMore","CHAR-CI<>?",
CHAR_DOWNCASE,
CHAR_EQ,"twoOrMore","CHAR=?",
CHAR_GE,"twoOrMore","CHAR>=?",
CHAR_GT,"twoOrMore","CHAR>?",
CHAR_LE,"twoOrMore","CHAR<=?",
CHAR_LOWER_CASE_P,
CHAR_LT,"twoOrMore","CHAR<?",
CHAR_NE,"twoOrMore","CHAR<>?",
CHAR_NUMERIC_P,
CHAR_P,
CHAR_UPCASE,
CHAR_UPPER_CASE_P,
CHAR_WHITESPACE_P,
INTEGER_2_CHAR,
LIST_2_STRING,
MAKE_STRING,1,2,
STRING,&null,
STRING_2_EXPRESSION,
STRING_2_LIST,
STRING_APPEND,&null,
STRING_CI_EQ,"twoOrMore","STRING-CI=?",
STRING_CI_GE,"twoOrMore","STRING-CI>=?",
STRING_CI_GT,"twoOrMore","STRING-CI>?",
STRING_CI_LE,"twoOrMore","STRING-CI<=?",
STRING_CI_LT,"twoOrMore","STRING-CI<?",
STRING_CI_NE,"twoOrMore","STRING-CI<>?",
STRING_COPY,
STRING_EQ,"twoOrMore","STRING=?",
STRING_FILL_BANG,2,
STRING_GE,"twoOrMore","STRING>=?",
STRING_GT,"twoOrMore","STRING>?",
STRING_LE,"twoOrMore","STRING<=?",
STRING_LENGTH,
STRING_LT,"twoOrMore","STRING<?",
STRING_NE,"twoOrMore","STRING<>?",
STRING_P,
STRING_REF,2,
STRING_SET_BANG,3,
SUBSTRING,2,3,
SUBSTRING_COPY_BANG,3])
return
end
#
# Characters
#
procedure CHAR_P(x)
return (CharP(x),T) | F
end
procedure CHAR_LT(c1,c2)
return STRING_LT(c1,c2)
end
procedure CHAR_LE(c1,c2)
return STRING_LE(c1,c2)
end
procedure CHAR_EQ(c1,c2)
return STRING_EQ(c1,c2)
end
procedure CHAR_GE(c1,c2)
return STRING_GE(c1,c2)
end
procedure CHAR_GT(c1,c2)
return STRING_GT(c1,c2)
end
procedure CHAR_NE(c1,c2)
return STRING_NE(c1,c2)
end
procedure CHAR_CI_LT(c1,c2)
return STRING_CI_LT(c1,c2)
end
procedure CHAR_CI_LE(c1,c2)
return STRING_CI_LE(c1,c2)
end
procedure CHAR_CI_EQ(c1,c2)
return STRING_CI_EQ(c1,c2)
end
procedure CHAR_CI_GE(c1,c2)
return STRING_CI_GE(c1,c2)
end
procedure CHAR_CI_GT(c1,c2)
return STRING_CI_GT(c1,c2)
end
procedure CHAR_CI_NE(c1,c2)
return STRING_CI_NE(c1,c2)
end
procedure CHAR_ALPHABETIC_P(c)
return (any(&letters,c.value),T) | F
end
procedure CHAR_NUMERIC_P(c)
return (any(&digits,c.value),T) | F
end
procedure CHAR_WHITESPACE_P(c)
return (any(' \n\f\r\l',c.value),T) | F
end
procedure CHAR_UPPER_CASE_P(c)
return (any(&ucase,c.value),T) | F
end
procedure CHAR_LOWER_CASE_P(c)
return (any(&lcase,c.value),T) | F
end
procedure CHAR_2_INTEGER(c)
return ord(c.value)
end
procedure INTEGER_2_CHAR(c)
return Char(char(c))
end
procedure CHAR_UPCASE(c)
return Char(map(c.value,&lcase,&ucase))
end
procedure CHAR_DOWNCASE(c)
return Char(map(c.value,&ucase,&lcase))
end
#
# Strings
#
procedure STRING_P(x)
return (StringP(x),T) | F
end
procedure MAKE_STRING(len,c)
return String(repl((\c).value | "\0",len))
end
procedure STRING(c[])
local result
result := ""
every result ||:= (!c).value
return String(result)
end
procedure STRING_LENGTH(s)
return *s.value
end
procedure STRING_REF(s,i)
return Char(s.value[i + 1])
end
procedure STRING_SET_BANG(s,i,c)
s.value[i + 1] := c.value
return s
end
invocable "<<":2
procedure STRING_LT(s[])
static op
initial op := proc("<<",2)
return StringPredicate(s,op)
end
invocable "<<=":2
procedure STRING_LE(s[])
static op
initial op := proc("<<=",2)
return StringPredicate(s,op)
end
invocable "==":2
procedure STRING_EQ(s[])
static op
initial op := proc("==",2)
return StringPredicate(s,op)
end
invocable ">>=":2
procedure STRING_GE(s[])
static op
initial op := proc(">>=",2)
return StringPredicate(s,op)
end
invocable ">>":2
procedure STRING_GT(s[])
static op
initial op := proc(">>",2)
return StringPredicate(s,op)
end
invocable "~==":2
procedure STRING_NE(s[])
static op
initial op := proc("~==",2)
return StringPredicate(s,op)
end
invocable "<<":2
procedure STRING_CI_LT(s[])
static op
initial op := proc("<<",2)
return StringPredicateCI(s,op)
end
invocable "<<=":2
procedure STRING_CI_LE(s[])
static op
initial op := proc("<<=",2)
return StringPredicateCI(s,op)
end
invocable "==":2
procedure STRING_CI_EQ(s[])
static op
initial op := proc("==",2)
return StringPredicateCI(s,op)
end
invocable ">>=":2
procedure STRING_CI_GE(s[])
static op
initial op := proc(">>=",2)
return StringPredicateCI(s,op)
end
invocable ">>":2
procedure STRING_CI_GT(s[])
static op
initial op := proc(">>",2)
return StringPredicateCI(s,op)
end
invocable "~==":2
procedure STRING_CI_NE(s[])
static op
initial op := proc("~==",2)
return StringPredicateCI(s,op)
end
procedure SUBSTRING(s,i,j)
return String(s.value[i + 1:\j + 1 | 0]) |
Error(SUBSTRING,"indices out of range")
end
procedure STRING_APPEND(s[])
local result
result := get(s).value | ""
every result ||:= (!s).value
return String(result)
end
procedure STRING_2_LIST(s)
local result
result := LLNull
every result := LLPair(Char(!s.value),result)
return LLInvert(result)
end
procedure LIST_2_STRING(lst)
return STRING!LLToList(lst)
end
procedure STRING_COPY(s)
return copy(s)
end
procedure STRING_FILL_BANG(s,c)
s.value := repl(c.value,*s.value)
return s
end
procedure STRING_2_EXPRESSION(s)
return StringToExpr(s.value) | F
end
procedure SUBSTRING_COPY_BANG(s1,k,s2)
local s2v,copyLen
s2v := s2.value
copyLen := *s1.value - k
copyLen >:= *s2v
s1.value[k + 1+:copyLen] := s2v
return s1
end
procedure StringPredicate(sList,op)
local result,x
result := get(sList).value
every x := (!sList).value do
result := op(result,x) | (if &errornumber then fail else return F)
return T
end
procedure StringPredicateCI(sList,op)
local result,x
result := map(get(sList).value)
every x := map((!sList).value) do
result := op(result,x) | (if &errornumber then fail else return F)
return T
end
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