| /* $Id$ */ |
| /* |
| * Copyright (C)2003-2007 Benny Prijono <benny@prijono.org> |
| * |
| * 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| #include <pj/errno.h> |
| #include <pj/string.h> |
| #include <pj/compat/string.h> |
| #include <pj/assert.h> |
| |
| /* Prototype for platform specific error message, which will be defined |
| * in separate file. |
| */ |
| PJ_BEGIN_DECL |
| |
| PJ_DECL(int) platform_strerror(pj_os_err_type code, |
| char *buf, pj_size_t bufsize ); |
| PJ_END_DECL |
| |
| #define PJLIB_MAX_ERR_MSG_HANDLER 8 |
| |
| /* Error message handler. */ |
| static unsigned err_msg_hnd_cnt; |
| static struct err_msg_hnd |
| { |
| pj_status_t begin; |
| pj_status_t end; |
| pj_str_t (*strerror)(pj_status_t, char*, pj_size_t); |
| |
| } err_msg_hnd[PJLIB_MAX_ERR_MSG_HANDLER]; |
| |
| /* PJLIB's own error codes/messages */ |
| #if defined(PJ_HAS_ERROR_STRING) && PJ_HAS_ERROR_STRING!=0 |
| |
| static const struct |
| { |
| int code; |
| const char *msg; |
| } err_str[] = |
| { |
| PJ_BUILD_ERR(PJ_EUNKNOWN, "Unknown Error" ), |
| PJ_BUILD_ERR(PJ_EPENDING, "Pending operation" ), |
| PJ_BUILD_ERR(PJ_ETOOMANYCONN, "Too many connecting sockets" ), |
| PJ_BUILD_ERR(PJ_EINVAL, "Invalid value or argument" ), |
| PJ_BUILD_ERR(PJ_ENAMETOOLONG, "Name too long" ), |
| PJ_BUILD_ERR(PJ_ENOTFOUND, "Not found" ), |
| PJ_BUILD_ERR(PJ_ENOMEM, "Not enough memory" ), |
| PJ_BUILD_ERR(PJ_EBUG, "BUG DETECTED!" ), |
| PJ_BUILD_ERR(PJ_ETIMEDOUT, "Operation timed out" ), |
| PJ_BUILD_ERR(PJ_ETOOMANY, "Too many objects of the specified type"), |
| PJ_BUILD_ERR(PJ_EBUSY, "Object is busy"), |
| PJ_BUILD_ERR(PJ_ENOTSUP, "Option/operation is not supported"), |
| PJ_BUILD_ERR(PJ_EINVALIDOP, "Invalid operation"), |
| PJ_BUILD_ERR(PJ_ECANCELLED, "Operation cancelled"), |
| PJ_BUILD_ERR(PJ_EEXISTS, "Object already exists" ), |
| PJ_BUILD_ERR(PJ_EEOF, "End of file" ), |
| PJ_BUILD_ERR(PJ_ETOOBIG, "Size is too big"), |
| PJ_BUILD_ERR(PJ_ERESOLVE, "gethostbyname() has returned error"), |
| PJ_BUILD_ERR(PJ_ETOOSMALL, "Size is too short"), |
| PJ_BUILD_ERR(PJ_EIGNORED, "Ignored"), |
| PJ_BUILD_ERR(PJ_EIPV6NOTSUP, "IPv6 is not supported"), |
| PJ_BUILD_ERR(PJ_EAFNOTSUP, "Unsupported address family") |
| }; |
| #endif /* PJ_HAS_ERROR_STRING */ |
| |
| |
| /* |
| * pjlib_error() |
| * |
| * Retrieve message string for PJLIB's own error code. |
| */ |
| static int pjlib_error(pj_status_t code, char *buf, pj_size_t size) |
| { |
| #if defined(PJ_HAS_ERROR_STRING) && PJ_HAS_ERROR_STRING!=0 |
| unsigned i; |
| |
| for (i=0; i<sizeof(err_str)/sizeof(err_str[0]); ++i) { |
| if (err_str[i].code == code) { |
| pj_size_t len = strlen(err_str[i].msg); |
| if (len >= size) len = size-1; |
| pj_memcpy(buf, err_str[i].msg, len); |
| buf[len] = '\0'; |
| return len; |
| } |
| } |
| #endif |
| |
| return pj_ansi_snprintf( buf, size, "Unknown pjlib error %d", code); |
| } |
| |
| #define IN_RANGE(val,start,end) ((val)>=(start) && (val)<(end)) |
| |
| /* Register strerror handle. */ |
| PJ_DEF(pj_status_t) pj_register_strerror( pj_status_t start, |
| pj_status_t space, |
| pj_error_callback f) |
| { |
| unsigned i; |
| |
| /* Check arguments. */ |
| PJ_ASSERT_RETURN(start && space && f, PJ_EINVAL); |
| |
| /* Check if there aren't too many handlers registered. */ |
| PJ_ASSERT_RETURN(err_msg_hnd_cnt < PJ_ARRAY_SIZE(err_msg_hnd), |
| PJ_ETOOMANY); |
| |
| /* Start error must be greater than PJ_ERRNO_START_USER */ |
| PJ_ASSERT_RETURN(start >= PJ_ERRNO_START_USER, PJ_EEXISTS); |
| |
| /* Check that no existing handler has covered the specified range. */ |
| for (i=0; i<err_msg_hnd_cnt; ++i) { |
| if (IN_RANGE(start, err_msg_hnd[i].begin, err_msg_hnd[i].end) || |
| IN_RANGE(start+space-1, err_msg_hnd[i].begin, err_msg_hnd[i].end)) |
| { |
| return PJ_EEXISTS; |
| } |
| } |
| |
| /* Register the handler. */ |
| err_msg_hnd[err_msg_hnd_cnt].begin = start; |
| err_msg_hnd[err_msg_hnd_cnt].end = start + space; |
| err_msg_hnd[err_msg_hnd_cnt].strerror = f; |
| |
| ++err_msg_hnd_cnt; |
| |
| return PJ_SUCCESS; |
| } |
| |
| /* Internal PJLIB function called by pj_shutdown() to clear error handlers */ |
| void pj_errno_clear_handlers(void) |
| { |
| err_msg_hnd_cnt = 0; |
| pj_bzero(err_msg_hnd, sizeof(err_msg_hnd)); |
| } |
| |
| |
| /* |
| * pj_strerror() |
| */ |
| PJ_DEF(pj_str_t) pj_strerror( pj_status_t statcode, |
| char *buf, pj_size_t bufsize ) |
| { |
| int len = -1; |
| pj_str_t errstr; |
| |
| pj_assert(buf && bufsize); |
| |
| if (statcode == PJ_SUCCESS) { |
| len = pj_ansi_snprintf( buf, bufsize, "Success"); |
| |
| } else if (statcode < PJ_ERRNO_START + PJ_ERRNO_SPACE_SIZE) { |
| len = pj_ansi_snprintf( buf, bufsize, "Unknown error %d", statcode); |
| |
| } else if (statcode < PJ_ERRNO_START_STATUS + PJ_ERRNO_SPACE_SIZE) { |
| len = pjlib_error(statcode, buf, bufsize); |
| |
| } else if (statcode < PJ_ERRNO_START_SYS + PJ_ERRNO_SPACE_SIZE) { |
| len = platform_strerror(PJ_STATUS_TO_OS(statcode), buf, bufsize); |
| |
| } else { |
| unsigned i; |
| |
| /* Find user handler to get the error message. */ |
| for (i=0; i<err_msg_hnd_cnt; ++i) { |
| if (IN_RANGE(statcode, err_msg_hnd[i].begin, err_msg_hnd[i].end)) { |
| return (*err_msg_hnd[i].strerror)(statcode, buf, bufsize); |
| } |
| } |
| |
| /* Handler not found! */ |
| len = pj_ansi_snprintf( buf, bufsize, "Unknown error %d", statcode); |
| } |
| |
| if (len < 1) { |
| *buf = '\0'; |
| len = 0; |
| } |
| |
| errstr.ptr = buf; |
| errstr.slen = len; |
| |
| return errstr; |
| } |
| |