// SPDX-License-Identifier: LGPL-2.1 /* * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> * */ #ifndef _TRACE_SEQ_H #define _TRACE_SEQ_H #include <stdarg.h> #include <stdio.h> /* ----------------------- trace_seq ----------------------- */ #ifndef TRACE_SEQ_BUF_SIZE #define TRACE_SEQ_BUF_SIZE 4096 #endif enum trace_seq_fail { TRACE_SEQ__GOOD, TRACE_SEQ__BUFFER_POISONED, TRACE_SEQ__MEM_ALLOC_FAILED, }; /* * Trace sequences are used to allow a function to call several other functions * to create a string of data to use (up to a max of PAGE_SIZE). */ struct trace_seq { char *buffer; unsigned int buffer_size; unsigned int len; unsigned int readpos; enum trace_seq_fail state; }; void trace_seq_init(struct trace_seq *s); void trace_seq_reset(struct trace_seq *s); void trace_seq_destroy(struct trace_seq *s); extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) __attribute__ ((format (printf, 2, 3))); extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) __attribute__ ((format (printf, 2, 0))); extern int trace_seq_puts(struct trace_seq *s, const char *str); extern int trace_seq_putc(struct trace_seq *s, unsigned char c); extern void trace_seq_terminate(struct trace_seq *s); extern int trace_seq_do_fprintf(struct trace_seq *s, FILE *fp); extern int trace_seq_do_printf(struct trace_seq *s); #endif /* _TRACE_SEQ_H */