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Code that doesn't want to know about current monitor vs. stdout vs. stderr takes an fprintf_function callback and a FILE * argument to pass to it. Actual arguments are either fprintf() and stdout or stderr, or monitor_fprintf() and the current monitor cast to FILE *. monitor_fprintf() casts it right back, and is otherwise identical to monitor_printf(). The type-punning is ugly. New qemu_fprintf() and qemu_vprintf() address this need without type punning: they are like fprintf() and vfprintf(), except they print to the current monitor when passed a null FILE *. The next commits will put them to use. Signed-off-by: Markus Armbruster <armbru@redhat.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Message-Id: <20190417191805.28198-14-armbru@redhat.com>
24 lines
608 B
C
24 lines
608 B
C
/*
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* Print to stream or current monitor
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*
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* Copyright (C) 2019 Red Hat Inc.
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*
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* Authors:
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* Markus Armbruster <armbru@redhat.com>,
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*/
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#ifndef QEMU_PRINT_H
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#define QEMU_PRINT_H
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int qemu_vprintf(const char *fmt, va_list ap) GCC_FMT_ATTR(1, 0);
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int qemu_printf(const char *fmt, ...) GCC_FMT_ATTR(1, 2);
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int qemu_vfprintf(FILE *stream, const char *fmt, va_list ap)
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GCC_FMT_ATTR(2, 0);
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int qemu_fprintf(FILE *stream, const char *fmt, ...) GCC_FMT_ATTR(2, 3);
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#endif
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