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b292748d9f
%line directives really need to be preprocessed early, before normal directive processing. In particular, they are *not* affected by such thing as smacro expansion, or deferred into an mmacro expansion. The %line directive is special because it is explicitly indented to be inserted by an external preprocessor, which can happen at any point. For mmacro and rep expansions, store the current file and line for each expansion line. Similarly, let each istk entry contain such information. Don't emit empty lines in preprocessing-only mode when we are already required to issue a %line directive anyway. This cuts down on clutter a fair bit. Quote filenames in %line directives (and accept quoted filenames in %line directives) if and only if it is necessary for disambiguation. This is required if: 1. The filename contains control characters; 2. The filename begins or ends with whitespace or a quotation mark; 3. The filename is empty. Otherwise issue the filename as-is, for backwards compatibility. Signed-off-by: H. Peter Anvin (Intel) <hpa@zytor.com>
115 lines
3.7 KiB
C
115 lines
3.7 KiB
C
/* ----------------------------------------------------------------------- *
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*
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* Copyright 1996-2016 The NASM Authors - All Rights Reserved
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* See the file AUTHORS included with the NASM distribution for
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* the specific copyright holders.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following
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* conditions are met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above
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* copyright notice, this list of conditions and the following
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* disclaimer in the documentation and/or other materials provided
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* with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
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* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* ----------------------------------------------------------------------- */
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/*
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* These functions are used to keep track of the source code file and name.
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*/
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#ifndef ASM_SRCFILE_H
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#define ASM_SRCFILE_H
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#include "compiler.h"
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struct src_location {
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const char *filename;
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int32_t lineno;
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};
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extern struct src_location _src_here;
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void src_init(void);
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void src_free(void);
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const char *src_set_fname(const char *newname);
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static inline const char *src_get_fname(void)
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{
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return _src_here.filename;
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}
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static inline int32_t src_set_linnum(int32_t newline)
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{
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int32_t oldline = _src_here.lineno;
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_src_here.lineno = newline;
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return oldline;
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}
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static inline int32_t src_get_linnum(void)
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{
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return _src_here.lineno;
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}
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/* Can be used when there is no need for the old information */
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void src_set(int32_t line, const char *filename);
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/*
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* src_get gets both the source file name and line.
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* It is also used if you maintain private status about the source location
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* It return 0 if the information was the same as the last time you
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* checked, -2 if the name changed and (new-old) if just the line changed.
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*
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* xname must point to a filename string previously returned from any
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* function of this subsystem or be NULL; another string value will
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* not work.
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*/
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static inline int32_t src_get(int32_t *xline, const char **xname)
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{
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const char *xn = *xname;
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int32_t xl = *xline;
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*xline = _src_here.lineno;
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*xname = _src_here.filename;
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/* The return value is expected to be optimized out almost everywhere */
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if (!xn || xn != _src_here.filename)
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return -2;
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else
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return _src_here.lineno - xl;
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}
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/*
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* Returns the current information as a structure.
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*/
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static inline struct src_location src_where(void)
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{
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return _src_here;
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}
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/*
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* Sets the current information. The filename member of the structure
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* *must* have been previously returned by src_get(), src_where(), or
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* src_get_fname() and therefore be present in the hash.
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*/
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static inline struct src_location src_update(struct src_location whence)
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{
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struct src_location old = _src_here;
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_src_here = whence;
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return old;
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}
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#endif /* ASM_SRCFILE_H */
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