| Tzvetomir Stoyanov (VMware) | 266b851 | 2018-08-28 18:50:38 -0400 | [diff] [blame] | 1 | // SPDX-License-Identifier: LGPL-2.1 |
| 2 | /* |
| 3 | * Copyright (C) 2009, 2010 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> |
| 4 | * |
| 5 | */ |
| 6 | |
| 7 | #ifndef _TRACE_SEQ_H |
| 8 | #define _TRACE_SEQ_H |
| 9 | |
| 10 | #include <stdarg.h> |
| 11 | #include <stdio.h> |
| 12 | |
| 13 | /* ----------------------- trace_seq ----------------------- */ |
| 14 | |
| 15 | #ifndef TRACE_SEQ_BUF_SIZE |
| 16 | #define TRACE_SEQ_BUF_SIZE 4096 |
| 17 | #endif |
| 18 | |
| 19 | enum trace_seq_fail { |
| 20 | TRACE_SEQ__GOOD, |
| 21 | TRACE_SEQ__BUFFER_POISONED, |
| 22 | TRACE_SEQ__MEM_ALLOC_FAILED, |
| 23 | }; |
| 24 | |
| 25 | /* |
| 26 | * Trace sequences are used to allow a function to call several other functions |
| 27 | * to create a string of data to use (up to a max of PAGE_SIZE). |
| 28 | */ |
| 29 | |
| 30 | struct trace_seq { |
| 31 | char *buffer; |
| 32 | unsigned int buffer_size; |
| 33 | unsigned int len; |
| 34 | unsigned int readpos; |
| 35 | enum trace_seq_fail state; |
| 36 | }; |
| 37 | |
| 38 | void trace_seq_init(struct trace_seq *s); |
| 39 | void trace_seq_reset(struct trace_seq *s); |
| 40 | void trace_seq_destroy(struct trace_seq *s); |
| 41 | |
| 42 | extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...) |
| 43 | __attribute__ ((format (printf, 2, 3))); |
| 44 | extern int trace_seq_vprintf(struct trace_seq *s, const char *fmt, va_list args) |
| 45 | __attribute__ ((format (printf, 2, 0))); |
| 46 | |
| 47 | extern int trace_seq_puts(struct trace_seq *s, const char *str); |
| 48 | extern int trace_seq_putc(struct trace_seq *s, unsigned char c); |
| 49 | |
| 50 | extern void trace_seq_terminate(struct trace_seq *s); |
| 51 | |
| 52 | extern int trace_seq_do_fprintf(struct trace_seq *s, FILE *fp); |
| 53 | extern int trace_seq_do_printf(struct trace_seq *s); |
| 54 | |
| 55 | #endif /* _TRACE_SEQ_H */ |