init - 初始化项目

3rdparty/libjasper/jas_tvp.c

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+/*
+ * Copyright (c) 2001-2002 Michael David Adams.
+ * All rights reserved.
+ */
+
+/* __START_OF_JASPER_LICENSE__
+ *
+ * JasPer License Version 2.0
+ *
+ * Copyright (c) 2001-2006 Michael David Adams
+ * Copyright (c) 1999-2000 Image Power, Inc.
+ * Copyright (c) 1999-2000 The University of British Columbia
+ *
+ * All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person (the
+ * "User") obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without restriction,
+ * including without limitation the rights to use, copy, modify, merge,
+ * publish, distribute, and/or sell copies of the Software, and to permit
+ * persons to whom the Software is furnished to do so, subject to the
+ * following conditions:
+ *
+ * 1.  The above copyright notices and this permission notice (which
+ * includes the disclaimer below) shall be included in all copies or
+ * substantial portions of the Software.
+ *
+ * 2.  The name of a copyright holder shall not be used to endorse or
+ * promote products derived from the Software without specific prior
+ * written permission.
+ *
+ * THIS DISCLAIMER OF WARRANTY CONSTITUTES AN ESSENTIAL PART OF THIS
+ * LICENSE.  NO USE OF THE SOFTWARE IS AUTHORIZED HEREUNDER EXCEPT UNDER
+ * THIS DISCLAIMER.  THE SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS
+ * "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING
+ * BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
+ * PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS.  IN NO
+ * EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
+ * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
+ * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
+ * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
+ * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.  NO ASSURANCES ARE
+ * PROVIDED BY THE COPYRIGHT HOLDERS THAT THE SOFTWARE DOES NOT INFRINGE
+ * THE PATENT OR OTHER INTELLECTUAL PROPERTY RIGHTS OF ANY OTHER ENTITY.
+ * EACH COPYRIGHT HOLDER DISCLAIMS ANY LIABILITY TO THE USER FOR CLAIMS
+ * BROUGHT BY ANY OTHER ENTITY BASED ON INFRINGEMENT OF INTELLECTUAL
+ * PROPERTY RIGHTS OR OTHERWISE.  AS A CONDITION TO EXERCISING THE RIGHTS
+ * GRANTED HEREUNDER, EACH USER HEREBY ASSUMES SOLE RESPONSIBILITY TO SECURE
+ * ANY OTHER INTELLECTUAL PROPERTY RIGHTS NEEDED, IF ANY.  THE SOFTWARE
+ * IS NOT FAULT-TOLERANT AND IS NOT INTENDED FOR USE IN MISSION-CRITICAL
+ * SYSTEMS, SUCH AS THOSE USED IN THE OPERATION OF NUCLEAR FACILITIES,
+ * AIRCRAFT NAVIGATION OR COMMUNICATION SYSTEMS, AIR TRAFFIC CONTROL
+ * SYSTEMS, DIRECT LIFE SUPPORT MACHINES, OR WEAPONS SYSTEMS, IN WHICH
+ * THE FAILURE OF THE SOFTWARE OR SYSTEM COULD LEAD DIRECTLY TO DEATH,
+ * PERSONAL INJURY, OR SEVERE PHYSICAL OR ENVIRONMENTAL DAMAGE ("HIGH
+ * RISK ACTIVITIES").  THE COPYRIGHT HOLDERS SPECIFICALLY DISCLAIM ANY
+ * EXPRESS OR IMPLIED WARRANTY OF FITNESS FOR HIGH RISK ACTIVITIES.
+ *
+ * __END_OF_JASPER_LICENSE__
+ */
+
+/*
+ * Tag-Value Parser Library
+ *
+ * $Id: jas_tvp.c,v 1.2 2008-05-26 09:40:52 vp153 Exp $
+ */
+
+/******************************************************************************\
+* Includes.
+\******************************************************************************/
+
+#include <assert.h>
+#include <stdio.h>
+#include <ctype.h>
+#include <stdlib.h>
+
+#include "jasper/jas_malloc.h"
+#include "jasper/jas_string.h"
+#include "jasper/jas_tvp.h"
+
+/******************************************************************************\
+* Macros.
+\******************************************************************************/
+
+/* Is the specified character valid for a tag name? */
+#define	JAS_TVP_ISTAG(x) \
+    (isalpha(x) || (x) == '_' || isdigit(x))
+
+/******************************************************************************\
+* Code for creating and destroying a tag-value parser.
+\******************************************************************************/
+
+jas_tvparser_t *jas_tvparser_create(const char *s)
+{
+    jas_tvparser_t *tvp;
+    if (!(tvp = jas_malloc(sizeof(jas_tvparser_t)))) {
+        return 0;
+    }
+    if (!(tvp->buf = jas_strdup(s))) {
+        jas_tvparser_destroy(tvp);
+        return 0;
+    }
+    tvp->pos = tvp->buf;
+    tvp->tag = 0;
+    tvp->val = 0;
+    return tvp;
+}
+
+void jas_tvparser_destroy(jas_tvparser_t *tvp)
+{
+    if (tvp->buf) {
+        jas_free(tvp->buf);
+    }
+    jas_free(tvp);
+}
+
+/******************************************************************************\
+* Main parsing code.
+\******************************************************************************/
+
+/* Get the next tag-value pair. */
+int jas_tvparser_next(jas_tvparser_t *tvp)
+{
+    char *p;
+    char *tag;
+    char *val;
+
+    /* Skip any leading whitespace. */
+    p = tvp->pos;
+    while (*p != '\0' && isspace(*p)) {
+        ++p;
+    }
+
+    /* Has the end of the input data been reached? */
+    if (*p == '\0') {
+        /* No more tags are present. */
+        tvp->pos = p;
+        return 1;
+    }
+
+    /* Does the tag name begin with a valid character? */
+    if (!JAS_TVP_ISTAG(*p)) {
+        return -1;
+    }
+
+    /* Remember where the tag name begins. */
+    tag = p;
+
+    /* Find the end of the tag name. */
+    while (*p != '\0' && JAS_TVP_ISTAG(*p)) {
+        ++p;
+    }
+
+    /* Has the end of the input data been reached? */
+    if (*p == '\0') {
+        /* The value field is empty. */
+        tvp->tag = tag;
+        tvp->val = "";
+        tvp->pos = p;
+        return 0;
+    }
+
+    /* Is a value field not present? */
+    if (*p != '=') {
+        if (*p != '\0' && !isspace(*p)) {
+            return -1;
+        }
+        *p++ = '\0';
+        tvp->tag = tag;
+        tvp->val = "";
+        tvp->pos = p;
+        return 0;
+    }
+
+    *p++ = '\0';
+
+    val = p;
+    while (*p != '\0' && !isspace(*p)) {
+        ++p;
+    }
+
+    if (*p != '\0') {
+        *p++ = '\0';
+    }
+
+    tvp->pos = p;
+    tvp->tag = tag;
+    tvp->val = val;
+
+    return 0;
+}
+
+/******************************************************************************\
+* Code for querying the current tag/value.
+\******************************************************************************/
+
+/* Get the current tag. */
+char *jas_tvparser_gettag(jas_tvparser_t *tvp)
+{
+    return tvp->tag;
+}
+
+/* Get the current value. */
+char *jas_tvparser_getval(jas_tvparser_t *tvp)
+{
+    return tvp->val;
+}
+
+/******************************************************************************\
+* Miscellaneous code.
+\******************************************************************************/
+
+/* Lookup a tag by name. */
+jas_taginfo_t *jas_taginfos_lookup(jas_taginfo_t *taginfos, const char *name)
+{
+    jas_taginfo_t *taginfo;
+    taginfo = taginfos;
+    while (taginfo->id >= 0) {
+        if (!strcmp(taginfo->name, name)) {
+            return taginfo;
+        }
+        ++taginfo;
+    }
+    return 0;
+}
+
+/* This function is simply for convenience. */
+/* One can avoid testing for the special case of a null pointer, by
+  using this function.   This function never returns a null pointer.  */
+jas_taginfo_t *jas_taginfo_nonull(jas_taginfo_t *taginfo)
+{
+    static jas_taginfo_t invalidtaginfo = {
+        -1, 0
+    };
+
+    return taginfo ? taginfo : &invalidtaginfo;
+}