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/* nasmlib.c library routines for the Netwide Assembler
*
* The Netwide Assembler is copyright (C) 1996 Simon Tatham and
* Julian Hall. All rights reserved. The software is
* redistributable under the licence given in the file "Licence"
* distributed in the NASM archive.
*/
#include <util.h>
#include <libyasm/coretype.h>
#include <libyasm/intnum.h>
#include <ctype.h>
#include "nasm.h"
#include "nasmlib.h"
/*#include "insns.h"*/ /* For MAX_KEYWORD */
#define lib_isnumchar(c) ( isalnum(c) || (c) == '$')
#define numvalue(c) ((c)>='a' ? (c)-'a'+10 : (c)>='A' ? (c)-'A'+10 : (c)-'0')
yasm_intnum *nasm_readnum (char *str, int *error)
{
char *r = str, *q, *p;
long radix;
yasm_intnum *intn;
char save;
int digit;
int sign = 0;
*error = FALSE;
while (isspace(*r)) r++; /* find start of number */
/*
* If the number came from make_tok_num (as a result of an %assign), it
* might have a '-' built into it (rather than in a preceeding token).
*/
if (*r == '-')
{
r++;
sign = 1;
}
q = r;
while (lib_isnumchar(*q)) q++; /* find end of number */
/*
* If it begins 0x, 0X or $, or ends in H, it's in hex. if it
* ends in Q, it's octal. if it ends in B, it's binary.
* Otherwise, it's ordinary decimal.
*/
if (*r=='0' && (r[1]=='x' || r[1]=='X'))
radix = 16, r += 2;
else if (*r=='$')
radix = 16, r++;
else if (q[-1]=='H' || q[-1]=='h')
radix = 16 , q--;
else if (q[-1]=='Q' || q[-1]=='q' || q[-1]=='O' || q[-1]=='o')
radix = 8 , q--;
else if (q[-1]=='B' || q[-1]=='b')
radix = 2 , q--;
else
radix = 10;
/*
* If this number has been found for us by something other than
* the ordinary scanners, then it might be malformed by having
* nothing between the prefix and the suffix. Check this case
* now.
*/
if (r >= q) {
*error = TRUE;
return yasm_intnum_create_uint(0);
}
/* Check for valid number of that radix */
p = r;
while (*p && p < q) {
if (*p<'0' || (*p>'9' && *p<'A') || (digit = numvalue(*p)) >= radix)
{
*error = TRUE;
return yasm_intnum_create_uint(0);
}
p++;
}
/* Use intnum to actually do the conversion */
save = *q;
*q = '\0';
switch (radix) {
case 2:
intn = yasm_intnum_create_bin(r);
break;
case 8:
intn = yasm_intnum_create_oct(r);
break;
case 10:
intn = yasm_intnum_create_dec(r);
break;
case 16:
intn = yasm_intnum_create_hex(r);
break;
default:
*error = TRUE;
intn = yasm_intnum_create_uint(0);
break;
}
*q = save;
if (sign)
yasm_intnum_calc(intn, YASM_EXPR_NEG, NULL);
return intn;
}
yasm_intnum *nasm_readstrnum (char *str, size_t length, int *warn)
{
char save;
yasm_intnum *intn;
*warn = FALSE;
save = str[length];
str[length] = '\0';
intn = yasm_intnum_create_charconst_nasm(str);
str[length] = save;
return intn;
}
static char *file_name = NULL;
static long line_number = 0;
char *nasm_src_set_fname(char *newname)
{
char *oldname = file_name;
file_name = newname;
return oldname;
}
char *nasm_src_get_fname(void)
{
return file_name;
}
long nasm_src_set_linnum(long newline)
{
long oldline = line_number;
line_number = newline;
return oldline;
}
long nasm_src_get_linnum(void)
{
return line_number;
}
int nasm_src_get(long *xline, char **xname)
{
if (!file_name || !*xname || strcmp(*xname, file_name))
{
nasm_free(*xname);
*xname = file_name ? nasm_strdup(file_name) : NULL;
*xline = line_number;
return -2;
}
if (*xline != line_number)
{
long tmp = line_number - *xline;
*xline = line_number;
return tmp;
}
return 0;
}
void nasm_quote(char **str)
{
size_t ln=strlen(*str);
char q=(*str)[0];
char *p;
if (ln>1 && (*str)[ln-1]==q && (q=='"' || q=='\''))
return;
q = '"';
if (strchr(*str,q))
q = '\'';
p = nasm_malloc(ln+3);
strcpy(p+1, *str);
nasm_free(*str);
p[ln+1] = p[0] = q;
p[ln+2] = 0;
*str = p;
}
char *nasm_strcat(const char *one, const char *two)
{
char *rslt;
size_t l1=strlen(one);
rslt = nasm_malloc(l1+strlen(two)+1);
strcpy(rslt, one);
strcpy(rslt+l1, two);
return rslt;
}
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