File: [local] / OpenXM_contrib2 / asir2000 / builtin / strobj.c (download)
Revision 1.5, Thu Mar 2 07:16:09 2000 UTC (24 years, 4 months ago) by noro
Branch: MAIN
CVS Tags: RELEASE_1_1_2 Changes since 1.4: +81 -1
lines
Added file manipulation functions : open_file(), get_line(), close_file().
Added string manipulation functions : str_len(), str_chr(), sub_str().
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/* $OpenXM: OpenXM_contrib2/asir2000/builtin/strobj.c,v 1.5 2000/03/02 07:16:09 noro Exp $ */
#include "ca.h"
#include "parse.h"
#include "ctype.h"
#if PARI
#include "genpari.h"
extern jmp_buf environnement;
#endif
#include <string.h>
extern char *parse_strp;
void Prtostr(), Pstrtov(), Peval_str();
void Pstrtoascii(), Pasciitostr();
void Pstr_len(), Pstr_chr(), Psub_str();
struct ftab str_tab[] = {
{"rtostr",Prtostr,1},
{"strtov",Pstrtov,1},
{"eval_str",Peval_str,1},
{"strtoascii",Pstrtoascii,1},
{"asciitostr",Pasciitostr,1},
{"str_len",Pstr_len,1},
{"str_chr",Pstr_chr,3},
{"sub_str",Psub_str,3},
{0,0,0},
};
void Pstr_len(arg,rp)
NODE arg;
Q *rp;
{
STRING str;
int r;
str = (STRING)ARG0(arg);
asir_assert(str,O_STR,"str_chr");
r = strlen(BDY(str));
STOQ(r,*rp);
}
void Pstr_chr(arg,rp)
NODE arg;
Q *rp;
{
STRING str,terminator;
Q start;
char *p,*ind;
int chr,spos,r;
str = (STRING)ARG0(arg);
start = (Q)ARG1(arg);
terminator = (STRING)ARG2(arg);
asir_assert(str,O_STR,"str_chr");
asir_assert(start,O_N,"str_chr");
asir_assert(terminator,O_STR,"str_chr");
p = BDY(str);
spos = QTOS(start);
chr = BDY(terminator)[0];
if ( spos > strlen(p) )
r = -1;
else {
ind = strchr(p+spos,chr);
if ( ind )
r = ind-p;
else
r = -1;
}
STOQ(r,*rp);
}
void Psub_str(arg,rp)
NODE arg;
STRING *rp;
{
STRING str;
Q head,tail;
char *p,*r;
int spos,epos,len;
str = (STRING)ARG0(arg);
head = (Q)ARG1(arg);
tail = (Q)ARG2(arg);
asir_assert(str,O_STR,"sub_str");
asir_assert(head,O_N,"sub_str");
asir_assert(tail,O_N,"sub_str");
p = BDY(str);
spos = QTOS(head);
epos = QTOS(tail);
len = strlen(p);
if ( (spos >= len) || (epos < spos) ) {
*rp = 0; return;
}
if ( epos >= len )
epos = len-1;
len = epos-spos+1;
r = (char *)MALLOC(len+1);
strncpy(r,p+spos,len);
r[len] = 0;
MKSTR(*rp,r);
}
void Pstrtoascii(arg,rp)
NODE arg;
LIST *rp;
{
STRING str;
unsigned char *p;
int len,i;
NODE n,n1;
Q q;
str = (STRING)ARG0(arg);
asir_assert(str,O_STR,"strtoascii");
p = BDY(str);
len = strlen(p);
for ( i = len-1, n = 0; i >= 0; i-- ) {
UTOQ((unsigned int)p[i],q);
MKNODE(n1,q,n);
n = n1;
}
MKLIST(*rp,n);
}
void Pasciitostr(arg,rp)
NODE arg;
STRING *rp;
{
LIST list;
unsigned char *p;
int len,i,j;
NODE n;
Q q;
list = (LIST)ARG0(arg);
asir_assert(list,O_LIST,"asciitostr");
n = BDY(list);
len = length(n);
p = MALLOC_ATOMIC(len+1);
for ( i = 0; i < len; i++, n = NEXT(n) ) {
q = (Q)BDY(n);
asir_assert(q,O_N,"asciitostr");
j = QTOS(q);
if ( j >= 256 || j <= 0 )
error("asciitostr : argument out of range");
p[i] = j;
}
p[i] = 0;
MKSTR(*rp,(char *)p);
}
void Peval_str(arg,rp)
NODE arg;
Obj *rp;
{
FNODE fnode;
char *cmd;
#if PARI
recover(0);
if ( setjmp(environnement) ) {
avma = top; recover(1);
resetenv("");
}
#endif
cmd = BDY((STRING)ARG0(arg));
exprparse(0,cmd,&fnode);
*rp = eval(fnode);
}
void Prtostr(arg,rp)
NODE arg;
STRING *rp;
{
char *b;
int len;
len = estimate_length(CO,ARG0(arg));
b = (char *)MALLOC(len+1);
soutput_init(b);
sprintexpr(CO,ARG0(arg));
MKSTR(*rp,b);
}
void Pstrtov(arg,rp)
NODE arg;
P *rp;
{
char *p,*t;
p = BDY((STRING)ARG0(arg));
#if 0
if ( !islower(*p) )
*rp = 0;
else {
for ( t = p+1; t && (isalnum(*t) || *t == '_'); t++ );
if ( *t )
*rp = 0;
else
makevar(p,rp);
}
#else
makevar(p,rp);
#endif
}