103 lines
3.8 KiB
C
103 lines
3.8 KiB
C
/*
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* Copyright (C) 2018 Intel Corporation. All rights reserved.
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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 conditions
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* 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 copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* * Neither the name of Intel Corporation nor the names of its
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* contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef SPRINTF_H
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#define SPRINTF_H
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/* Command for the emit function: copy string to output. */
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#define PRINT_CMD_COPY 0x00000000
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/* Command for the emit function: fill output with first character. */
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#define PRINT_CMD_FILL 0x00000001
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/* Structure used to parse parameters and variables to subroutines. */
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struct print_param {
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/* A pointer to the function that is used to emit characters. */
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int (*emit)(int, const char *, int, void *);
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/* An opaque pointer that is passed as third argument to the emit
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* function.
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*/
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void *data;
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/* Contains variables which are recalculated for each argument. */
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struct {
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/* A bitfield with the parsed format flags. */
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int flags;
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/* The parsed format width. */
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int width;
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/* The parsed format precision. */
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int precision;
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/* The bitmask for unsigned values. */
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unsigned long long mask;
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/* A pointer to the preformated value. */
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const char *value;
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/* The number of characters in the preformated value buffer. */
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uint32_t valuelen;
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/* A pointer to the values prefix. */
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const char *prefix;
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/* The number of characters in the prefix buffer. */
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uint32_t prefixlen;
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} vars;
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};
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int do_print(const char *fmt, struct print_param *param,
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__builtin_va_list args);
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/** The well known vsnprintf() function.
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*
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* Formats and writes a string with a max. size to memory.
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*
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* @param dst A pointer to the destination memory.
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* @param sz The size of the destination memory.
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* @param fmt A pointer to the NUL terminated format string.
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* @param args The variable long argument list as va_list.
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* @return The number of bytes which would be written, even if the destination
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* is smaller. On error a negative number is returned.
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*/
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int vsnprintf(char *dst, int sz, const char *fmt, va_list args);
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/** The well known snprintf() function.
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*
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* Formats a string and writes it to the console output.
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*
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* @param dest Pointer to the destination memory.
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* @param sz Max. size of dest.
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* @param fmt A pointer to the NUL terminated format string.
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*
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* @return The number of characters would by written or a negative
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* number if an error occurred.
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*
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* @bug sz == 0 doesn't work
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*/
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int snprintf(char *dest, int sz, const char *fmt, ...);
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#endif /* SPRINTF_H */
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