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/****************************************************************
/* CHARACTER and STRING functions
/* 1987-Dec-17
/* Copyright(c) Toshihiro MATSUI, ETL, 1988.
/****************************************************************/
static char *rcsid="@(#)$Id$";
#include <ctype.h>
#include "eus.h"
pointer EUSCHAR(ctx,n,argv)
register context *ctx;
register int n;
register pointer argv[];
{ register pointer a=argv[0];
ckarg(2);
n=ckintval(argv[1]);
if (!isstring(a)) error(E_NOSTRING);
if (n<0 || vecsize(a)<=n) error(E_ARRAYINDEX);
/* This code should be eliminated, because the compiler cannot know if
this object is a normal string or a foreign string, thus no optimization.
if (elmtypeof(a)==ELM_FOREIGN)
return(makeint((a->c.foreign.chars)[n]));
else */
return(makeint(a->c.str.chars[n]));}
pointer SETCHAR(ctx,n,argv)
register context *ctx;
register int n;
register pointer argv[];
{ register pointer a=argv[0];
register int newval=ckintval(argv[2]);
ckarg(3);
n=ckintval(argv[1]);
if (!isstring(a)) error(E_NOSTRING);
if (n<0 || vecsize(a)<=n) error(E_ARRAYINDEX);
/* if (elmtypeof(a)==ELM_FOREIGN)
((byte *)(a->c.ivec.iv[0]))[n]=newval;
else */
a->c.str.chars[n]=newval;
return(argv[2]);}
pointer UPCASEP(ctx,n,argv)
register context *ctx;
register int n;
register pointer argv[];
{ ckarg(1); n=ckintval(argv[0]);
return((isupper(n))?T:NIL);}
pointer LOWCASEP(ctx,n,argv)
register context *ctx;
register int n;
register pointer argv[];
{ ckarg(1); n=ckintval(argv[0]);
return((islower(n))?T:NIL);}
pointer ALPHAP(ctx,n,argv)
register context *ctx;
register int n;
pointer argv[];
{ ckarg(1); n=ckintval(argv[0]);
return((isalpha(n))?T:NIL);}
pointer DIGITP(ctx,n,argv)
register context *ctx;
register int n;
pointer argv[];
{ ckarg(1); n=ckintval(argv[0]);
return((isdigit(n))?T:NIL);}
pointer ALNUMP(ctx,n,argv)
register context *ctx;
register int n;
register pointer argv[];
{ ckarg(1); n=ckintval(argv[0]);
return((isalnum(n))?T:NIL);}
pointer CHUPCASE(ctx,n,argv)
register context *ctx;
register int n;
pointer argv[];
{ ckarg(1); n=ckintval(argv[0]);
return((islower(n))?(makeint(toupper(n))):argv[0]);}
pointer CHDOWNCASE(ctx,n,argv)
register context *ctx;
register int n;
pointer argv[];
{ ckarg(1); n=ckintval(argv[0]);
return((isupper(n))?(makeint(tolower(n))):argv[0]);}
pointer STRINGEQ(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ register byte *str1, *str2;
int start1,end1,start2,end2;
register int len;
pointer s1=Getstring(argv[0]), s2=Getstring(argv[1]);
ckarg(6);
start1=ckintval(argv[2]); end1=ckintval(argv[3]);
end1=min(end1,vecsize(s1));
start2=ckintval(argv[4]); end2=ckintval(argv[5]);
end2=min(end2,vecsize(s2));
len=end1-start1;
if (len!=end2-start2) return(NIL);
str1= &s1->c.str.chars[start1]; str2= &s2->c.str.chars[start2];
while (len-->0) if (*str1++ != *str2++) return(NIL);
return(T);}
pointer STRINGEQUAL(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ register byte *str1, *str2;
int start1,end1,start2,end2,ch1,ch2;
pointer s1=Getstring(argv[0]),s2=Getstring(argv[1]);
register int len;
ckarg(6);
start1=ckintval(argv[2]); end1=ckintval(argv[3]); end1=min(end1,vecsize(s1));
start2=ckintval(argv[4]); end2=ckintval(argv[5]); end2=min(end2,vecsize(s2));
len=end1-start1;
if (len!=end2-start2) return(NIL);
str1= &s1->c.str.chars[start1]; str2= &s2->c.str.chars[start2];
while (len-->0) {
ch1= *str1++; ch2= *str2++;
if (islower(ch1)) ch1=toupper(ch1);
if (islower(ch2)) ch2=toupper(ch2);
if (ch1!=ch2) return(NIL);}
return(T);}
/****************************************************************/
/* S T R I N G compare
/****************************************************************/
#define eusstrcmp(a,b) strcmp((char *)(a), (char *)(b))
pointer STR_LT(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ ckarg(2);
if (eusstrcmp(get_string(argv[0]),get_string(argv[1]))<0) return(T);
else return(NIL);}
pointer STR_LE(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ ckarg(2);
if (eusstrcmp(get_string(argv[0]),get_string(argv[1]))<=0) return(T);
else return(NIL);}
pointer STR_EQ(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ ckarg(2);
if (eusstrcmp(get_string(argv[0]),get_string(argv[1]))==0) return(T);
else return(NIL);}
pointer STR_GT(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ ckarg(2);
if (eusstrcmp(get_string(argv[0]),get_string(argv[1]))>0) return(T);
else return(NIL);}
pointer STR_GE(ctx,n,argv)
register context *ctx;
int n;
register pointer argv[];
{ ckarg(2);
if (eusstrcmp(get_string(argv[0]),get_string(argv[1]))>=0) return(T);
else return(NIL);}
/* initializers */
void charstring(ctx,mod)
register context *ctx;
register pointer mod;
{
defun(ctx,"CHAR",mod,EUSCHAR,NULL);
defun(ctx,"SCHAR",mod,EUSCHAR,NULL);
defun(ctx,"SETCHAR",mod,SETCHAR,NULL);
defun(ctx,"ALPHA-CHAR-P",mod,ALPHAP,NULL);
defun(ctx,"UPPER-CASE-P",mod,UPCASEP,NULL);
defun(ctx,"LOWER-CASE-P",mod,LOWCASEP,NULL);
defun(ctx,"DIGIT-CHAR-P",mod,DIGITP,NULL);
defun(ctx,"ALPHANUMERICP",mod,ALNUMP,NULL);
defun(ctx,"CHAR-UPCASE",mod,CHUPCASE,NULL);
defun(ctx,"CHAR-DOWNCASE",mod,CHDOWNCASE,NULL);
defun(ctx,"STRINGEQ",mod,STRINGEQ,NULL);
defun(ctx,"STRINGEQUAL",mod,STRINGEQUAL,NULL);
defun(ctx,"STRING<",mod,STR_LT,NULL);
defun(ctx,"STRING<=",mod,STR_LE,NULL);
defun(ctx,"STRING=",mod,STR_EQ,NULL);
defun(ctx,"STRING>",mod,STR_GT,NULL);
defun(ctx,"STRING>=",mod,STR_GE,NULL);
}
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