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/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2016 The NASM Authors - All Rights Reserved
* See the file AUTHORS included with the NASM distribution for
* the specific copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ----------------------------------------------------------------------- */
/*
* srcfile.c - keep track of the current position in the input stream
*/
#include "compiler.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <errno.h>
#include <inttypes.h>
#include "nasmlib.h"
#include "hashtbl.h"
static const char *file_name = NULL;
static int32_t line_number = 0;
static struct hash_table filename_hash;
void src_init(void)
{
hash_init(&filename_hash, HASH_MEDIUM);
}
void src_free(void)
{
struct hash_tbl_node *iter = NULL;
void *dp;
while ((dp = hash_iterate(&filename_hash, &iter, NULL)) != NULL)
nasm_free(dp);
hash_free(&filename_hash);
}
/*
* Set the current filename, returning the old one. The input
* filename is duplicated if needed.
*/
const char *src_set_fname(const char *newname)
{
struct hash_insert hi;
const char *oldname;
void **dp;
if (newname) {
dp = hash_find(&filename_hash, newname, &hi);
if (dp) {
newname = (const char *)(*dp);
} else {
newname = nasm_strdup(newname);
hash_add(&hi, newname, (void *)newname);
}
}
oldname = file_name;
file_name = newname;
return oldname;
}
int32_t src_set_linnum(int32_t newline)
{
int32_t oldline = line_number;
line_number = newline;
return oldline;
}
void src_set(int32_t line, const char *fname)
{
src_set_fname(fname);
src_set_linnum(line);
}
const char *src_get_fname(void)
{
return file_name;
}
int32_t src_get_linnum(void)
{
return line_number;
}
int32_t src_get(int32_t *xline, const char **xname)
{
const char *xn = *xname;
int32_t xl = *xline;
*xline = line_number;
*xname = file_name;
/* XXX: Is the strcmp() really needed here? */
if (!file_name || !xn || (xn != file_name && strcmp(xn, file_name)))
return -2;
else
return line_number - xl;
}
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