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/* Utility functions for scan-decls and fix-header programs.
Copyright (C) 1993, 1994, 1998, 2002, 2003, 2007 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify it
under the terms of the GNU General Public License as published by the
Free Software Foundation; either version 3, or (at your option) any
later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "bconfig.h"
#include "system.h"
#include "coretypes.h"
#include "tm.h"
#include "scan.h"
int lineno = 1;
int source_lineno = 1;
sstring source_filename;
void
make_sstring_space (sstring *str, int count)
{
int cur_pos = str->ptr - str->base;
int cur_size = str->limit - str->base;
int new_size = cur_pos + count + 100;
if (new_size <= cur_size)
return;
str->base = xrealloc (str->base, new_size);
str->ptr = str->base + cur_size;
str->limit = str->base + new_size;
}
void
sstring_append (sstring *dst, sstring *src)
{
char *d, *s;
int count = SSTRING_LENGTH (src);
MAKE_SSTRING_SPACE (dst, count + 1);
d = dst->ptr;
s = src->base;
while (--count >= 0) *d++ = *s++;
dst->ptr = d;
*d = 0;
}
int
scan_ident (FILE *fp, sstring *s, int c)
{
s->ptr = s->base;
if (ISIDST (c))
{
for (;;)
{
SSTRING_PUT (s, c);
c = getc (fp);
if (c == EOF || ! ISIDNUM (c))
break;
}
}
MAKE_SSTRING_SPACE (s, 1);
*s->ptr = 0;
return c;
}
int
scan_string (FILE *fp, sstring *s, int init)
{
int c;
for (;;)
{
c = getc (fp);
if (c == EOF || c == '\n')
break;
if (c == init)
{
c = getc (fp);
break;
}
if (c == '\\')
{
c = getc (fp);
if (c == EOF)
break;
if (c == '\n')
continue;
}
SSTRING_PUT (s, c);
}
MAKE_SSTRING_SPACE (s, 1);
*s->ptr = 0;
return c;
}
/* Skip horizontal white spaces (spaces, tabs, and C-style comments). */
int
skip_spaces (FILE *fp, int c)
{
for (;;)
{
if (c == ' ' || c == '\t')
c = getc (fp);
else if (c == '/')
{
c = getc (fp);
if (c != '*')
{
ungetc (c, fp);
return '/';
}
c = getc (fp);
for (;;)
{
if (c == EOF)
return EOF;
else if (c != '*')
{
if (c == '\n')
source_lineno++, lineno++;
c = getc (fp);
}
else if ((c = getc (fp)) == '/')
return getc (fp);
}
}
else
break;
}
return c;
}
int
read_upto (FILE *fp, sstring *str, int delim)
{
int ch;
for (;;)
{
ch = getc (fp);
if (ch == EOF || ch == delim)
break;
SSTRING_PUT (str, ch);
}
MAKE_SSTRING_SPACE (str, 1);
*str->ptr = 0;
return ch;
}
int
get_token (FILE *fp, sstring *s)
{
int c;
s->ptr = s->base;
retry:
c = ' ';
c = skip_spaces (fp, c);
if (c == '\n')
{
source_lineno++;
lineno++;
goto retry;
}
if (c == '#')
{
c = get_token (fp, s);
if (c == INT_TOKEN)
{
source_lineno = atoi (s->base) - 1; /* '\n' will add 1 */
get_token (fp, &source_filename);
}
for (;;)
{
c = getc (fp);
if (c == EOF)
return EOF;
if (c == '\n')
{
source_lineno++;
lineno++;
goto retry;
}
}
}
if (c == EOF)
return EOF;
if (ISDIGIT (c))
{
do
{
SSTRING_PUT (s, c);
c = getc (fp);
} while (c != EOF && ISDIGIT (c));
ungetc (c, fp);
c = INT_TOKEN;
goto done;
}
if (ISIDST (c))
{
c = scan_ident (fp, s, c);
ungetc (c, fp);
return IDENTIFIER_TOKEN;
}
if (c == '\'' || c == '"')
{
c = scan_string (fp, s, c);
ungetc (c, fp);
return c == '\'' ? CHAR_TOKEN : STRING_TOKEN;
}
SSTRING_PUT (s, c);
done:
MAKE_SSTRING_SPACE (s, 1);
*s->ptr = 0;
return c;
}
unsigned int
hashstr (const char *str, unsigned int len)
{
unsigned int n = len;
unsigned int r = 0;
const unsigned char *s = (const unsigned char *) str;
do
r = r * 67 + (*s++ - 113);
while (--n);
return r + len;
}
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