mirror of
https://github.com/netwide-assembler/nasm
synced 2026-08-26 16:23:04 -04:00
720a32672c
Replace the direct setting of variables for input and output variables with accessors. This allows for properly tracking the lifetimes of the data and allows for things like checking of the overwrite of the primary input file to be centralized. It isn't possible *in the general case* to check for overwrite of *any* of the input files, although in the particularly important case of the assembler proper it ought to be possible to do a bit better: it should be able to guard for overwrites of non-primary input files except for the error file or the list file if and only if -Lp is used. That is, however, a latter project. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
64 lines
1.4 KiB
C
64 lines
1.4 KiB
C
/* SPDX-License-Identifier: BSD-2-Clause */
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/* Copyright 2026 The NASM Authors - All Rights Reserved */
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#include "compiler.h"
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#include "files.h"
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#include "error.h"
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static const char * const filename_names[FN_NFILES] = {
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"input",
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"output",
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"error",
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"list",
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"dependency"
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};
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const char *_filenames[FN_NFILES];
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const char *copy_filename(enum filenames fn, const char *src)
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{
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return set_filename(fn, nasm_strdup(src));
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}
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const char *set_filename(enum filenames fn, char *src)
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{
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const char **dstp, *dst;
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nasm_assert((size_t)fn < ARRAY_SIZE(_filenames));
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dstp = &_filenames[fn];
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dst = *dstp;
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if (dst) {
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nasm_fatal("more than one %s file specified: %s and %s",
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filename_names[fn], dst, src);
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}
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return *dstp = src;
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}
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void check_overwrite_files(void)
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{
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enum filenames fn;
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const char *inname = get_filename(FN_INFILE);
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if (!inname)
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return;
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for (fn = FN_INFILE+1; fn < FN_NFILES; fn++) {
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const char *outname = get_filename(fn);
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if (outname && !strcmp(inname, outname)) {
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nasm_fatal("%s file would overwrite input file",
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filename_names[fn]);
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}
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}
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}
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void cleanup_filenames(void)
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{
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enum filenames fn;
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for (fn = 0; fn < FN_NFILES; fn++) {
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nasm_free((char *)_filenames[fn]);
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_filenames[fn] = NULL;
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}
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}
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