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/* string.c: string routines for nawm */
/* Copyright (C) 1999 by the Massachusetts Institute of Technology.
*
* Permission to use, copy, modify, and distribute this
* software and its documentation for any purpose and without
* fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting
* documentation, and that the name of M.I.T. not be used in
* advertising or publicity pertaining to distribution of the
* software without specific, written prior permission.
* M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is"
* without express or implied warranty.
*/
#include "nawmmod.h"
#include <stdlib.h>
#include <string.h>
int nawm_modrev = 1;
static void substr_fun(int argc, nawmval *argv, nawmval *ret);
static void tolower_fun(int argc, nawmval *argv, nawmval *ret);
static void toupper_fun(int argc, nawmval *argv, nawmval *ret);
static void strdup_fun(int argc, nawmval *argv, nawmval *ret);
static void strlen_fun(int argc, nawmval *argv, nawmval *ret);
static void strindex_fun(int argc, nawmval *argv, nawmval *ret);
static void strcspn_fun(int argc, nawmval *argv, nawmval *ret);
static void strspn_fun(int argc, nawmval *argv, nawmval *ret);
static void strtok_fun(int argc, nawmval *argv, nawmval *ret);
static void strexplode_fun(int argc, nawmval *argv, nawmval *ret);
static void ascii_fun(int argc, nawmval *argv, nawmval *ret);
static void char_fun(int argc, nawmval *argv, nawmval *ret);
void modinit(void)
{
module_define_procedure("substr", T_STR, substr_fun, 3, T_STR, T_INT, T_INT);
module_define_procedure("tolower", T_STR, tolower_fun, 1, T_STR);
module_define_procedure("toupper", T_STR, toupper_fun, 1, T_STR);
module_define_procedure("strdup", T_STR, strdup_fun, 1, T_STR);
module_define_procedure("strlen", T_INT, strlen_fun, 1, T_STR);
module_define_procedure("strindex", T_INT, strindex_fun, 2, T_STR, T_STR);
module_define_procedure("strcspn", T_INT, strcspn_fun, 2, T_STR, T_STR);
module_define_procedure("strspn", T_INT, strspn_fun, 2, T_STR, T_STR);
module_define_procedure("strtok", array_type(T_STR, T_INT), strtok_fun, 2, T_STR, T_STR);
module_define_procedure("strexplode", array_type(T_STR, T_INT), strexplode_fun, 1, T_STR);
module_define_procedure("ascii", T_INT, ascii_fun, 1, T_STR);
module_define_procedure("char", T_STR, char_fun, 1, T_INT);
}
static void substr_fun(int argc, nawmval *argv, nawmval *ret)
{
char *s = (char *)argv[0];
int start = argv[1], len = argv[2];
if (len == 0)
len = strlen(s) - start + 1;
*ret = (nawmval)gcmalloc(len + 1, free);
memcpy((void *)*ret, s + start, len);
}
static void tolower_fun(int argc, nawmval *argv, nawmval *ret)
{
char *s = (char *)argv[0], *p;
*ret = (nawmval)gcstrdup(s);
for (p = (char *)*ret; *p; p++)
*p = tolower(*p);
}
static void toupper_fun(int argc, nawmval *argv, nawmval *ret)
{
char *s = (char *)argv[0], *p;
*ret = (nawmval)gcstrdup(s);
for (p = (char *)*ret; *p; p++)
*p = toupper(*p);
}
static void strdup_fun(int argc, nawmval *argv, nawmval *ret)
{
*ret = (nawmval)gcstrdup((char *)argv[0]);
}
static void strlen_fun(int argc, nawmval *argv, nawmval *ret)
{
*ret = strlen((char *)argv[0]);
}
static void strindex_fun(int argc, nawmval *argv, nawmval *ret)
{
char *s = (char *)argv[0], *match = (char *)argv[1], *p;
p = strstr(s, match);
if (!p)
*ret = -1;
else
*ret = p - s;
}
static void strcspn_fun(int argc, nawmval *argv, nawmval *ret)
{
*ret = strcspn((char *)argv[0], (char *)argv[1]);
}
static void strspn_fun(int argc, nawmval *argv, nawmval *ret)
{
*ret = strspn((char *)argv[0], (char *)argv[1]);
}
static void strtok_fun(int argc, nawmval *argv, nawmval *ret)
{
int n;
char *s = (char *)argv[0], *sep = (char *)argv[1], *dup, *p;
dup = xstrdup(s);
for (p = strtok(dup, sep), n = 0; p; p = strtok(NULL, sep))
n++;
free(dup);
*ret = (nawmval)create_array(array_type(T_STR, T_INT), n);
dup = xstrdup(s);
for (p = strtok(dup, sep); p; p = strtok(dup, sep))
array_insert((array *)*ret, n++, (nawmval)gcstrdup(p));
free(dup);
}
static void strexplode_fun(int argc, nawmval *argv, nawmval *ret)
{
char *s = (char *)argv[0], *p, ch[2] = {0, 0};
int n;
*ret = (nawmval)create_array(array_type(T_STR, T_INT), strlen(s));
for (p = s, n = 0; *p; p++)
{
ch[0] = *p;
array_insert((array *)*ret, n++, (nawmval)gcstrdup(ch));
}
}
static void ascii_fun(int argc, nawmval *argv, nawmval *ret)
{
*ret = *(char *)argv[0];
}
static void char_fun(int argc, nawmval *argv, nawmval *ret)
{
char s[2] = {0, 0};
s[0] = argv[0];
*ret = (nawmval)gcstrdup(s);
}
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