[libsigrok.git] / error.c

/*
 * This file is part of the sigrok project.
 *
 * Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301 USA
 */

#include "libsigrok.h"

/**
 * @file
 *
 * Error handling in libsigrok.
 */

/**
 * @defgroup grp_error Error handling
 *
 * Error handling in libsigrok.
 *
 * libsigrok functions usually return @ref SR_OK upon success, or a negative
 * error code on failure.
 *
 * @{
 */

/**
 * Return a human-readable error string for the given libsigrok error code.
 *
 * @param error_code A libsigrok error code number, such as SR_ERR_MALLOC.
 *
 * @return A const string containing a short, human-readable (English)
 *         description of the error, such as "memory allocation error".
 *         The string must NOT be free'd by the caller!
 *
 * @see sr_strerror_name
 *
 * @since 0.2.0
 */
SR_API const char *sr_strerror(int error_code)
{
	const char *str;

	/*
	 * Note: All defined SR_* error macros from libsigrok.h should have
	 * an entry in this function, as well as in sr_strerror_name().
	 */

	switch (error_code) {
	case SR_OK:
		str = "no error";
		break;
	case SR_ERR:
		str = "generic/unspecified error";
		break;
	case SR_ERR_MALLOC:
		str = "memory allocation error";
		break;
	case SR_ERR_BUG:
		str = "internal error";
		break;
	case SR_ERR_SAMPLERATE:
		str = "invalid samplerate";
		break;
	default:
		str = "unknown error";
		break;
	}

	return str;
}

/**
 * Return the "name" string of the given libsigrok error code.
 *
 * For example, the "name" of the SR_ERR_MALLOC error code is "SR_ERR_MALLOC",
 * the name of the SR_OK code is "SR_OK", and so on.
 *
 * This function can be used for various purposes where the "name" string of
 * a libsigrok error code is useful.
 *
 * @param error_code A libsigrok error code number, such as SR_ERR_MALLOC.
 *
 * @return A const string containing the "name" of the error code as string.
 *         The string must NOT be free'd by the caller!
 *
 * @see sr_strerror
 *
 * @since 0.2.0
 */
SR_API const char *sr_strerror_name(int error_code)
{
	const char *str;

	/*
	 * Note: All defined SR_* error macros from libsigrok.h should have
	 * an entry in this function, as well as in sr_strerror().
	 */

	switch (error_code) {
	case SR_OK:
		str = "SR_OK";
		break;
	case SR_ERR:
		str = "SR_ERR";
		break;
	case SR_ERR_MALLOC:
		str = "SR_ERR_MALLOC";
		break;
	case SR_ERR_BUG:
		str = "SR_ERR_BUG";
		break;
	case SR_ERR_SAMPLERATE:
		str = "SR_ERR_SAMPLERATE";
		break;
	default:
		str = "unknown error code";
		break;
	}

	return str;
}

/** @} */
Commit	Line	Data
b5a8e848 UH	1	/*
	2	* This file is part of the sigrok project.
	3	*
	4	* Copyright (C) 2012 Uwe Hermann <uwe@hermann-uwe.de>
	5	*
	6	* This program is free software; you can redistribute it and/or modify
	7	* it under the terms of the GNU General Public License as published by
	8	* the Free Software Foundation; either version 2 of the License, or
	9	* (at your option) any later version.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
	19	*/
	20
	21	#include "libsigrok.h"
	22
393fb9cb UH	23	/**
	24	* @file
	25	*
	26	* Error handling in libsigrok.
	27	*/
	28
7b870c38 UH	29	/**
	30	* @defgroup grp_error Error handling
	31	*
	32	* Error handling in libsigrok.
	33	*
f21193fa UH	34	* libsigrok functions usually return @ref SR_OK upon success, or a negative
	35	* error code on failure.
	36	*
7b870c38 UH	37	* @{
	38	*/
	39
b5a8e848 UH	40	/**
	41	* Return a human-readable error string for the given libsigrok error code.
	42	*
	43	* @param error_code A libsigrok error code number, such as SR_ERR_MALLOC.
9fb5f2df	44	*
b5a8e848 UH	45	* @return A const string containing a short, human-readable (English)
	46	* description of the error, such as "memory allocation error".
	47	* The string must NOT be free'd by the caller!
9fb5f2df	48	*
b5a8e848	49	* @see sr_strerror_name
9fb5f2df UH	50	*
9fb5f2df UH	51	* @since 0.2.0
b5a8e848 UH	52	*/
	53	SR_API const char *sr_strerror(int error_code)
	54	{
	55	const char *str;
	56
	57	/*
	58	* Note: All defined SR_* error macros from libsigrok.h should have
	59	* an entry in this function, as well as in sr_strerror_name().
	60	*/
	61
	62	switch (error_code) {
	63	case SR_OK:
	64	str = "no error";
	65	break;
	66	case SR_ERR:
	67	str = "generic/unspecified error";
	68	break;
	69	case SR_ERR_MALLOC:
	70	str = "memory allocation error";
	71	break;
	72	case SR_ERR_BUG:
	73	str = "internal error";
	74	break;
	75	case SR_ERR_SAMPLERATE:
	76	str = "invalid samplerate";
	77	break;
	78	default:
	79	str = "unknown error";
	80	break;
	81	}
	82
	83	return str;
	84	}
	85
	86	/**
	87	* Return the "name" string of the given libsigrok error code.
	88	*
	89	* For example, the "name" of the SR_ERR_MALLOC error code is "SR_ERR_MALLOC",
	90	* the name of the SR_OK code is "SR_OK", and so on.
	91	*
	92	* This function can be used for various purposes where the "name" string of
	93	* a libsigrok error code is useful.
	94	*
	95	* @param error_code A libsigrok error code number, such as SR_ERR_MALLOC.
9fb5f2df	96	*
b5a8e848 UH	97	* @return A const string containing the "name" of the error code as string.
b5a8e848 UH	98	* The string must NOT be free'd by the caller!
9fb5f2df	99	*
b5a8e848	100	* @see sr_strerror
9fb5f2df UH	101	*
9fb5f2df UH	102	* @since 0.2.0
b5a8e848 UH	103	*/
	104	SR_API const char *sr_strerror_name(int error_code)
	105	{
	106	const char *str;
	107
	108	/*
	109	* Note: All defined SR_* error macros from libsigrok.h should have
	110	* an entry in this function, as well as in sr_strerror().
	111	*/
	112
	113	switch (error_code) {
	114	case SR_OK:
	115	str = "SR_OK";
	116	break;
	117	case SR_ERR:
	118	str = "SR_ERR";
	119	break;
	120	case SR_ERR_MALLOC:
	121	str = "SR_ERR_MALLOC";
	122	break;
	123	case SR_ERR_BUG:
	124	str = "SR_ERR_BUG";
	125	break;
	126	case SR_ERR_SAMPLERATE:
	127	str = "SR_ERR_SAMPLERATE";
	128	break;
	129	default:
	130	str = "unknown error code";
	131	break;
	132	}
	133
	134	return str;
	135	}
7b870c38 UH	136
7b870c38 UH	137	/** @} */