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Annotation of embedaddon/libpdel/tmpl/tmpl.c, revision 1.1

1.1     ! misho       1: 
        !             2: /*
        !             3:  * Copyright (c) 2001-2002 Packet Design, LLC.
        !             4:  * All rights reserved.
        !             5:  * 
        !             6:  * Subject to the following obligations and disclaimer of warranty,
        !             7:  * use and redistribution of this software, in source or object code
        !             8:  * forms, with or without modifications are expressly permitted by
        !             9:  * Packet Design; provided, however, that:
        !            10:  * 
        !            11:  *    (i)  Any and all reproductions of the source or object code
        !            12:  *         must include the copyright notice above and the following
        !            13:  *         disclaimer of warranties; and
        !            14:  *    (ii) No rights are granted, in any manner or form, to use
        !            15:  *         Packet Design trademarks, including the mark "PACKET DESIGN"
        !            16:  *         on advertising, endorsements, or otherwise except as such
        !            17:  *         appears in the above copyright notice or in the software.
        !            18:  * 
        !            19:  * THIS SOFTWARE IS BEING PROVIDED BY PACKET DESIGN "AS IS", AND
        !            20:  * TO THE MAXIMUM EXTENT PERMITTED BY LAW, PACKET DESIGN MAKES NO
        !            21:  * REPRESENTATIONS OR WARRANTIES, EXPRESS OR IMPLIED, REGARDING
        !            22:  * THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY AND ALL IMPLIED
        !            23:  * WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE,
        !            24:  * OR NON-INFRINGEMENT.  PACKET DESIGN DOES NOT WARRANT, GUARANTEE,
        !            25:  * OR MAKE ANY REPRESENTATIONS REGARDING THE USE OF, OR THE RESULTS
        !            26:  * OF THE USE OF THIS SOFTWARE IN TERMS OF ITS CORRECTNESS, ACCURACY,
        !            27:  * RELIABILITY OR OTHERWISE.  IN NO EVENT SHALL PACKET DESIGN BE
        !            28:  * LIABLE FOR ANY DAMAGES RESULTING FROM OR ARISING OUT OF ANY USE
        !            29:  * OF THIS SOFTWARE, INCLUDING WITHOUT LIMITATION, ANY DIRECT,
        !            30:  * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, PUNITIVE, OR CONSEQUENTIAL
        !            31:  * DAMAGES, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, LOSS OF
        !            32:  * USE, DATA OR PROFITS, HOWEVER CAUSED AND UNDER ANY THEORY OF
        !            33:  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
        !            34:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF
        !            35:  * THE USE OF THIS SOFTWARE, EVEN IF PACKET DESIGN IS ADVISED OF
        !            36:  * THE POSSIBILITY OF SUCH DAMAGE.
        !            37:  *
        !            38:  * Author: Archie Cobbs <archie@freebsd.org>
        !            39:  */
        !            40: 
        !            41: #include "tmpl_internal.h"
        !            42: 
        !            43: /* Internal functions */
        !            44: static struct  tmpl *tmpl_create_internal(FILE *input, void *addr,
        !            45:                        size_t len, int *num_errors, const char *mtype);
        !            46: 
        !            47: /*
        !            48:  * Create a new template object.
        !            49:  */
        !            50: struct tmpl *
        !            51: tmpl_create(FILE *input, int *num_errors, const char *mtype)
        !            52: {
        !            53:        return (tmpl_create_internal(input, NULL, 0, num_errors, mtype));
        !            54: }
        !            55: 
        !            56: /*
        !            57:  * Create a new template object using mmap().
        !            58:  */
        !            59: struct tmpl *
        !            60: tmpl_create_mmap(const char *path, int *num_errors, const char *mtype)
        !            61: {
        !            62:        struct tmpl *tmpl;
        !            63:        struct stat sb;
        !            64:        void *addr;
        !            65:        int esave;
        !            66:        FILE *fp;
        !            67:        int fd;
        !            68: 
        !            69:        /* Open and memory map file */
        !            70:        if ((fd = open(path, O_RDONLY)) == -1)
        !            71:                return (NULL);
        !            72:        if (fstat(fd, &sb) == -1) {
        !            73:                close(fd);
        !            74:                return (NULL);
        !            75:        }
        !            76:        if ((addr = mmap(NULL, sb.st_size,
        !            77:            PROT_READ, MAP_SHARED, fd, 0)) == NULL) {
        !            78:                close(fd);
        !            79:                return (NULL);
        !            80:        }
        !            81:        close(fd);
        !            82: 
        !            83:        /* Parse file */
        !            84:        if ((fp = fopen(path, "r")) == NULL)
        !            85:                return (NULL);
        !            86:        if ((tmpl = tmpl_create_internal(fp, addr,
        !            87:            sb.st_size, num_errors, mtype)) == NULL) {
        !            88:                esave = errno;
        !            89:                fclose(fp);
        !            90:                errno = esave;
        !            91:                return (NULL);
        !            92:        }
        !            93: 
        !            94:        /* Done */
        !            95:        return (tmpl);
        !            96: }
        !            97: 
        !            98: /*
        !            99:  * Create a new template object.
        !           100:  */
        !           101: static struct tmpl *
        !           102: tmpl_create_internal(FILE *input, void *addr, size_t len,
        !           103:        int *num_errors, const char *mtype)
        !           104: {
        !           105:        struct tmpl *tmpl;
        !           106:        int dummy;
        !           107:        int r;
        !           108: 
        !           109:        /* Sanity check */
        !           110:        if (input == NULL) {
        !           111:                errno = EINVAL;
        !           112:                return (NULL);
        !           113:        }
        !           114:        if (num_errors == NULL)
        !           115:                num_errors = &dummy;
        !           116: 
        !           117:        /* Initialize template object */
        !           118:        if ((tmpl = MALLOC(mtype, sizeof(*tmpl))) == NULL)
        !           119:                return (NULL);
        !           120:        memset(tmpl, 0, sizeof(*tmpl));
        !           121:        tmpl->mmap_addr = addr;
        !           122:        tmpl->mmap_len = len;
        !           123:        if (mtype != NULL) {
        !           124:                strlcpy(tmpl->mtype_buf, mtype, sizeof(tmpl->mtype_buf));
        !           125:                tmpl->mtype = tmpl->mtype_buf;
        !           126:        }
        !           127: 
        !           128:        /* Parse template; cleanup if thread is canceled */
        !           129:        pthread_cleanup_push((void (*)(void *))tmpl_destroy, &tmpl);
        !           130:        r = _tmpl_parse(tmpl, input, num_errors);
        !           131:        pthread_cleanup_pop(0);
        !           132: 
        !           133:        /* Check for error */
        !           134:        if (r == -1) {
        !           135:                tmpl_destroy(&tmpl);
        !           136:                return (NULL);
        !           137:        }
        !           138: 
        !           139:        /* Done */
        !           140:        return (tmpl);
        !           141: }
        !           142: 
        !           143: /*
        !           144:  * Destroy a template object.
        !           145:  */
        !           146: void
        !           147: tmpl_destroy(struct tmpl **tmplp)
        !           148: {
        !           149:        struct tmpl *const tmpl = *tmplp;
        !           150: 
        !           151:        if (tmpl == NULL)
        !           152:                return;
        !           153:        *tmplp = NULL;
        !           154:        _tmpl_free_elems(tmpl->mtype,
        !           155:            tmpl->eblock, tmpl->elems, tmpl->num_elems);
        !           156:        if (tmpl->mmap_addr != NULL)
        !           157:                munmap(tmpl->mmap_addr, tmpl->mmap_len);
        !           158:        FREE(tmpl->mtype, tmpl);
        !           159: }
        !           160: