guest/mesa/src/util/u_printf.h

//
// Copyright 2020 Serge Martin
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the "Software"),
// to deal in the Software without restriction, including without limitation
// the rights to use, copy, modify, merge, publish, distribute, sublicense,
// and/or sell copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in
// all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
// THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
// OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.
//
#ifndef U_PRINTF_H
#define U_PRINTF_H

#include <stdarg.h>
#include <stddef.h>

#ifdef __cplusplus
extern "C" {
#endif

typedef struct u_printf_info {
   unsigned num_args;
   unsigned *arg_sizes;
   unsigned string_size;
   char *strings;
} u_printf_info;

/* find next valid printf specifier in a C string wrapper */
size_t util_printf_next_spec_pos(const char *str, size_t pos);

/* Return the length of the string that would be generated by a printf-style
 * format and argument list, not including the \0 byte.
 * The untouched_args parameter is left untouched so it can be re-used by the
 * caller in a vsnprintf() call or similar.
 */
size_t u_printf_length(const char *fmt, va_list untouched_args);

void u_printf(FILE *out, const char *buffer, size_t buffer_size,
              const u_printf_info*, unsigned info_size);

#ifdef __cplusplus
}
#endif

#endif