88 lines
2.6 KiB
C
88 lines
2.6 KiB
C
/*
|
|
* Copyright (C) 2018 Intel Corporation. All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
*/
|
|
|
|
#ifndef SPRINTF_H
|
|
#define SPRINTF_H
|
|
|
|
/* Command for the emit function: copy string to output. */
|
|
#define PRINT_CMD_COPY 0x00000000U
|
|
|
|
/* Command for the emit function: fill output with first character. */
|
|
#define PRINT_CMD_FILL 0x00000001U
|
|
|
|
/** Structure used to call back emit lived in print_param */
|
|
struct snprint_param {
|
|
/** The destination buffer. */
|
|
char *dst;
|
|
/** The size of the destination buffer. */
|
|
uint32_t sz;
|
|
/** Counter for written chars. */
|
|
uint32_t wrtn;
|
|
};
|
|
|
|
/* Structure used to parse parameters and variables to subroutines. */
|
|
struct print_param {
|
|
/* A pointer to the function that is used to emit characters. */
|
|
void (*emit)(size_t, const char *, uint32_t, struct snprint_param *);
|
|
/* An opaque pointer that is passed as forth argument to the emit
|
|
* function.
|
|
*/
|
|
struct snprint_param *data;
|
|
/* Contains variables which are recalculated for each argument. */
|
|
struct {
|
|
/* A bitfield with the parsed format flags. */
|
|
uint32_t flags;
|
|
/* The parsed format width. */
|
|
uint32_t width;
|
|
/* The parsed format precision. */
|
|
uint32_t precision;
|
|
/* The bitmask for unsigned values. */
|
|
uint64_t mask;
|
|
/* A pointer to the preformated value. */
|
|
const char *value;
|
|
/* The number of characters in the preformated value buffer. */
|
|
uint32_t valuelen;
|
|
/* A pointer to the values prefix. */
|
|
const char *prefix;
|
|
/* The number of characters in the prefix buffer. */
|
|
uint32_t prefixlen;
|
|
} vars;
|
|
};
|
|
|
|
void do_print(const char *fmt_arg, struct print_param *param,
|
|
__builtin_va_list args);
|
|
|
|
/** The well known vsnprintf() function.
|
|
*
|
|
* Formats and writes a string with a max. size to memory.
|
|
*
|
|
* @param dst A pointer to the destination memory.
|
|
* @param sz The size of the destination memory.
|
|
* @param fmt A pointer to the NUL terminated format string.
|
|
* @param args The variable long argument list as va_list.
|
|
* @return The number of bytes which would be written, even if the destination
|
|
* is smaller. On error a negative number is returned.
|
|
*/
|
|
size_t vsnprintf(char *dst_arg, size_t sz_arg, const char *fmt, va_list args);
|
|
|
|
/** The well known snprintf() function.
|
|
*
|
|
* Formats a string and writes it to the console output.
|
|
*
|
|
* @param dest Pointer to the destination memory.
|
|
* @param sz Max. size of dest.
|
|
* @param fmt A pointer to the NUL terminated format string.
|
|
*
|
|
* @return The number of characters would by written or a negative
|
|
* number if an error occurred.
|
|
*
|
|
* @bug sz == 0 doesn't work
|
|
*/
|
|
|
|
size_t snprintf(char *dest, size_t sz, const char *fmt, ...);
|
|
|
|
#endif /* SPRINTF_H */
|