diff options
| -rw-r--r-- | Makefile | 2 | ||||
| -rw-r--r-- | util.c | 31 | ||||
| -rw-r--r-- | util.h | 65 |
3 files changed, 97 insertions, 1 deletions
@@ -2,7 +2,7 @@ P = nios2sim-ng VERSION = 0.1 OBJS = main.o image.o elf.o srec.o nios2.o memory.o instruction.o simulator.o \ - device.o uart.o jtag_uart.o + device.o uart.o jtag_uart.o util.o #OBJS += load_image.o nor_flash.o simulator.o simulator.o niosii.o i_type_handler.o j_type_handler.o \ # r_type_handler.o custom_instr.o timer.o @@ -0,0 +1,31 @@ +/* + * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch> + * + * This file is part of nios2sim-ng. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#include <stdlib.h> +#include <string.h> + +#include "nios2sim-ng.h" +#include "util.h" + +/** + * Allocate memory which is set to zero. + * + * @param size requested size of memory in bytes + * @return pointer to the allocated and zeroed memory on success, NULL on + * error + */ +void *zalloc(const size_t size) +{ + void *ret = malloc(size); + + if (likely(ret != NULL)) + memset(ret, 0x00, size); + return ret; +} @@ -0,0 +1,65 @@ +/* + * Copyright (C) 2010 Tobias Klauser <tklauser@distanz.ch> + * + * This file is part of nios2sim-ng. + * + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + */ + +#ifndef _UTIL_H_ +#define _UTIL_H_ + +#include <string.h> + +/* + * Memory allocation + */ + +extern void *zalloc(const size_t size); + +/* + * String handling and manipulation + */ + +/** + * Check whether two strings match exactly. + * + * @param ctx the reference string (usually a defined constant or string under + * the programs control) + * @param arg the string to match against the reference string (usually the + * user-supplied string) + * @return true if the strings match + */ +static inline bool xstrmatch(const char *ctx, const char *arg) +{ + size_t len = strlen(ctx); + return (strlen(arg) == len && strncmp(arg, ctx, len) == 0); +} + +/** + * Check whether a string is empty (either NULL or empty string). + * + * @param str string to check for emptiness + * @return true if the string is empty + */ +static inline bool xstrisempty(const char *str) +{ + return ((str == NULL) || (xstrmatch("", str))); +} + + +/* + * Stringification macro (taken from Linux Kernel source code) + */ + +/* Indirect stringification. Doing two levels allows the parameter to be a + * macro itself. For example, compile with -DFOO=bar, __stringify(FOO) + * converts to "bar". + */ + +#define __stringify_1(x...) #x +#define __stringify(x...) __stringify_1(x) + +#endif /* _UTIL_H_ */ |