src/common/ezxml.h

/* RCSid $Id: ezxml.h,v 2.1 2009/06/17 20:41:47 greg Exp $ */
/* ezxml.h
 *
 * Copyright 2004-2006 Aaron Voisine <[email protected]>
 *
 * Permission is hereby granted, free of charge, to any person 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, sublicense, 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:
 *
 * The above copyright notice and this permission notice shall be included
 * in all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "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.
 * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
 * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
 * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
 * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#ifndef _EZXML_H
#define _EZXML_H

#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <fcntl.h>

#ifdef __cplusplus
extern "C" {
#endif

/* disable MMAP on CYGWIN, seems to cause problems... */
#ifdef CYGWIN
#define EZXML_NOMMAP
#endif

#define EZXML_BUFSIZE 1024 /* size of internal memory buffers */
#define EZXML_NAMEM   0x80 /* name is malloced */
#define EZXML_TXTM    0x40 /* txt is malloced */
#define EZXML_DUP     0x20 /* attribute name and value are strduped */

typedef struct ezxml *ezxml_t;
struct ezxml {
    char *name;      /* tag name */
    char **attr;     /* tag attributes { name, value, name, value, ... NULL } */
    char *txt;       /* tag character content, empty string if none */
    size_t off;      /* tag offset from start of parent tag character content */
    ezxml_t next;    /* next tag with same name in this section at this depth */
    ezxml_t sibling; /* next tag with different name in same section and depth */
    ezxml_t ordered; /* next tag, same section and depth, in original order */
    ezxml_t child;   /* head of sub tag list, NULL if none */
    ezxml_t parent;  /* parent tag, NULL if current tag is root tag */
    short flags;     /* additional information */
};

/* Given a string of xml data and its length, parses it and creates an ezxml */
/* structure. For efficiency, modifies the data by adding null terminators */
/* and decoding ampersand sequences. If you don't want this, copy the data and */
/* pass in the copy. Returns NULL on failure. */
ezxml_t ezxml_parse_str(char *s, size_t len);

/* A wrapper for ezxml_parse_str() that accepts a file descriptor. First */
/* attempts to mem map the file. Failing that, reads the file into memory. */
/* Returns NULL on failure. */
ezxml_t ezxml_parse_fd(int fd);

/* a wrapper for ezxml_parse_fd() that accepts a file name */
ezxml_t ezxml_parse_file(const char *file);
    
/* Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire */
/* stream into memory and then parses it. For xml files, use ezxml_parse_file() */
/* or ezxml_parse_fd() */
ezxml_t ezxml_parse_fp(FILE *fp);

/* returns the first child tag (one level deeper) with the given name or NULL */
/* if not found */
ezxml_t ezxml_child(ezxml_t xml, const char *name);

/* returns the next tag of the same name in the same section and depth or NULL */
/* if not found */
#define ezxml_next(xml) ((xml) ? xml->next : NULL)

/* Returns the Nth tag with the same name in the same section at the same depth */
/* or NULL if not found. An index of 0 returns the tag given. */
ezxml_t ezxml_idx(ezxml_t xml, int idx);

/* returns the name of the given tag */
#define ezxml_name(xml) ((xml) ? xml->name : NULL)

/* returns the given tag's character content or empty string if none */
#define ezxml_txt(xml) ((xml) ? xml->txt : "")

/* returns the value of the requested tag attribute, or NULL if not found */
const char *ezxml_attr(ezxml_t xml, const char *attr);

/* Traverses the ezxml sturcture to retrieve a specific subtag. Takes a */
/* variable length list of tag names and indexes. The argument list must be */
/* terminated by either an index of -1 or an empty string tag name. Example:  */
/* title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1); */
/* This retrieves the title of the 3rd book on the 1st shelf of library. */
/* Returns NULL if not found. */
ezxml_t ezxml_get(ezxml_t xml, ...);

/* Converts an ezxml structure back to xml. Returns a string of xml data that */
/* must be freed. */
char *ezxml_toxml(ezxml_t xml);

/* returns a NULL terminated array of processing instructions for the given */
/* target */
const char **ezxml_pi(ezxml_t xml, const char *target);

/* frees the memory allocated for an ezxml structure */
void ezxml_free(ezxml_t xml);
    
/* returns parser error message or empty string if none */
const char *ezxml_error(ezxml_t xml);

/* returns a new empty ezxml structure with the given root tag name */
ezxml_t ezxml_new(const char *name);

/* wrapper for ezxml_new() that strdup()s name */
#define ezxml_new_d(name) ezxml_set_flag(ezxml_new(strdup(name)), EZXML_NAMEM)

/* Adds a child tag. off is the offset of the child tag relative to the start */
/* of the parent tag's character content. Returns the child tag. */
ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off);

/* wrapper for ezxml_add_child() that strdup()s name */
#define ezxml_add_child_d(xml, name, off) \
    ezxml_set_flag(ezxml_add_child(xml, strdup(name), off), EZXML_NAMEM)

/* sets the character content for the given tag and returns the tag */
ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt);

/* wrapper for ezxml_set_txt() that strdup()s txt */
#define ezxml_set_txt_d(xml, txt) \
    ezxml_set_flag(ezxml_set_txt(xml, strdup(txt)), EZXML_TXTM)

/* Sets the given tag attribute or adds a new attribute if not found. A value */
/* of NULL will remove the specified attribute. Returns the tag given. */
ezxml_t ezxml_set_attr(ezxml_t xml, const char *name, const char *value);

/* Wrapper for ezxml_set_attr() that strdup()s name/value. Value cannot be NULL */
#define ezxml_set_attr_d(xml, name, value) \
    ezxml_set_attr(ezxml_set_flag(xml, EZXML_DUP), strdup(name), strdup(value))

/* sets a flag for the given tag and returns the tag */
ezxml_t ezxml_set_flag(ezxml_t xml, short flag);

/* removes a tag along with its subtags without freeing its memory */
ezxml_t ezxml_cut(ezxml_t xml);

/* inserts an existing tag into an ezxml structure */
ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off);

/* Moves an existing tag to become a subtag of dest at the given offset from */
/* the start of dest's character content. Returns the moved tag. */
#define ezxml_move(xml, dest, off) ezxml_insert(ezxml_cut(xml), dest, off)

/* removes a tag along with all its subtags */
#define ezxml_remove(xml) ezxml_free(ezxml_cut(xml))

#ifdef __cplusplus
}
#endif

#endif /* _EZXML_H */
Revision:	2.2
Committed:	Wed Jun 1 00:29:40 2011 UTC (12 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
CVS Tags:	rad4R2P2, rad4R2, rad4R1, rad4R2P1
Changes since 2.1:	+64 -64 lines
Log Message:	Fixes to get working version of variable-resolution BSDF
#	User	Rev	Content
1	greg	2.2	/* RCSid $Id: ezxml.h,v 2.1 2009/06/17 20:41:47 greg Exp $ */
2	greg	2.1	/* ezxml.h
3			*
4			* Copyright 2004-2006 Aaron Voisine <[email protected]>
5			*
6			* Permission is hereby granted, free of charge, to any person obtaining
7			* a copy of this software and associated documentation files (the
8			* "Software"), to deal in the Software without restriction, including
9			* without limitation the rights to use, copy, modify, merge, publish,
10			* distribute, sublicense, and/or sell copies of the Software, and to
11			* permit persons to whom the Software is furnished to do so, subject to
12			* the following conditions:
13			*
14			* The above copyright notice and this permission notice shall be included
15			* in all copies or substantial portions of the Software.
16			*
17			* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
18			* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
19			* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
20			* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
21			* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
22			* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
23			* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
24			*/
25
26			#ifndef _EZXML_H
27			#define _EZXML_H
28
29			#include <stdlib.h>
30			#include <stdio.h>
31			#include <stdarg.h>
32			#include <fcntl.h>
33
34			#ifdef __cplusplus
35			extern "C" {
36			#endif
37
38			/* disable MMAP on CYGWIN, seems to cause problems... */
39			#ifdef CYGWIN
40			#define EZXML_NOMMAP
41			#endif
42
43	greg	2.2	#define EZXML_BUFSIZE 1024 /* size of internal memory buffers */
44			#define EZXML_NAMEM 0x80 /* name is malloced */
45			#define EZXML_TXTM 0x40 /* txt is malloced */
46			#define EZXML_DUP 0x20 /* attribute name and value are strduped */
47	greg	2.1
48			typedef struct ezxml *ezxml_t;
49			struct ezxml {
50	greg	2.2	char name; / tag name */
51			char *attr; / tag attributes { name, value, name, value, ... NULL } */
52			char txt; / tag character content, empty string if none */
53			size_t off; /* tag offset from start of parent tag character content */
54			ezxml_t next; /* next tag with same name in this section at this depth */
55			ezxml_t sibling; /* next tag with different name in same section and depth */
56			ezxml_t ordered; /* next tag, same section and depth, in original order */
57			ezxml_t child; /* head of sub tag list, NULL if none */
58			ezxml_t parent; /* parent tag, NULL if current tag is root tag */
59			short flags; /* additional information */
60	greg	2.1	};
61
62	greg	2.2	/* Given a string of xml data and its length, parses it and creates an ezxml */
63			/* structure. For efficiency, modifies the data by adding null terminators */
64			/* and decoding ampersand sequences. If you don't want this, copy the data and */
65			/* pass in the copy. Returns NULL on failure. */
66	greg	2.1	ezxml_t ezxml_parse_str(char *s, size_t len);
67
68	greg	2.2	/* A wrapper for ezxml_parse_str() that accepts a file descriptor. First */
69			/* attempts to mem map the file. Failing that, reads the file into memory. */
70			/* Returns NULL on failure. */
71	greg	2.1	ezxml_t ezxml_parse_fd(int fd);
72
73	greg	2.2	/* a wrapper for ezxml_parse_fd() that accepts a file name */
74	greg	2.1	ezxml_t ezxml_parse_file(const char *file);
75
76	greg	2.2	/* Wrapper for ezxml_parse_str() that accepts a file stream. Reads the entire */
77			/* stream into memory and then parses it. For xml files, use ezxml_parse_file() */
78			/* or ezxml_parse_fd() */
79	greg	2.1	ezxml_t ezxml_parse_fp(FILE *fp);
80
81	greg	2.2	/* returns the first child tag (one level deeper) with the given name or NULL */
82			/* if not found */
83	greg	2.1	ezxml_t ezxml_child(ezxml_t xml, const char *name);
84
85	greg	2.2	/* returns the next tag of the same name in the same section and depth or NULL */
86			/* if not found */
87	greg	2.1	#define ezxml_next(xml) ((xml) ? xml->next : NULL)
88
89	greg	2.2	/* Returns the Nth tag with the same name in the same section at the same depth */
90			/* or NULL if not found. An index of 0 returns the tag given. */
91	greg	2.1	ezxml_t ezxml_idx(ezxml_t xml, int idx);
92
93	greg	2.2	/* returns the name of the given tag */
94	greg	2.1	#define ezxml_name(xml) ((xml) ? xml->name : NULL)
95
96	greg	2.2	/* returns the given tag's character content or empty string if none */
97	greg	2.1	#define ezxml_txt(xml) ((xml) ? xml->txt : "")
98
99	greg	2.2	/* returns the value of the requested tag attribute, or NULL if not found */
100	greg	2.1	const char ezxml_attr(ezxml_t xml, const char attr);
101
102	greg	2.2	/* Traverses the ezxml sturcture to retrieve a specific subtag. Takes a */
103			/* variable length list of tag names and indexes. The argument list must be */
104			/* terminated by either an index of -1 or an empty string tag name. Example: */
105			/* title = ezxml_get(library, "shelf", 0, "book", 2, "title", -1); */
106			/* This retrieves the title of the 3rd book on the 1st shelf of library. */
107			/* Returns NULL if not found. */
108	greg	2.1	ezxml_t ezxml_get(ezxml_t xml, ...);
109
110	greg	2.2	/* Converts an ezxml structure back to xml. Returns a string of xml data that */
111			/* must be freed. */
112	greg	2.1	char *ezxml_toxml(ezxml_t xml);
113
114	greg	2.2	/* returns a NULL terminated array of processing instructions for the given */
115			/* target */
116	greg	2.1	const char *ezxml_pi(ezxml_t xml, const char target);
117
118	greg	2.2	/* frees the memory allocated for an ezxml structure */
119	greg	2.1	void ezxml_free(ezxml_t xml);
120
121	greg	2.2	/* returns parser error message or empty string if none */
122	greg	2.1	const char *ezxml_error(ezxml_t xml);
123
124	greg	2.2	/* returns a new empty ezxml structure with the given root tag name */
125	greg	2.1	ezxml_t ezxml_new(const char *name);
126
127	greg	2.2	/* wrapper for ezxml_new() that strdup()s name */
128	greg	2.1	#define ezxml_new_d(name) ezxml_set_flag(ezxml_new(strdup(name)), EZXML_NAMEM)
129
130	greg	2.2	/* Adds a child tag. off is the offset of the child tag relative to the start */
131			/* of the parent tag's character content. Returns the child tag. */
132	greg	2.1	ezxml_t ezxml_add_child(ezxml_t xml, const char *name, size_t off);
133
134	greg	2.2	/* wrapper for ezxml_add_child() that strdup()s name */
135	greg	2.1	#define ezxml_add_child_d(xml, name, off) \
136			ezxml_set_flag(ezxml_add_child(xml, strdup(name), off), EZXML_NAMEM)
137
138	greg	2.2	/* sets the character content for the given tag and returns the tag */
139	greg	2.1	ezxml_t ezxml_set_txt(ezxml_t xml, const char *txt);
140
141	greg	2.2	/* wrapper for ezxml_set_txt() that strdup()s txt */
142	greg	2.1	#define ezxml_set_txt_d(xml, txt) \
143			ezxml_set_flag(ezxml_set_txt(xml, strdup(txt)), EZXML_TXTM)
144
145	greg	2.2	/* Sets the given tag attribute or adds a new attribute if not found. A value */
146			/* of NULL will remove the specified attribute. Returns the tag given. */
147	greg	2.1	ezxml_t ezxml_set_attr(ezxml_t xml, const char name, const char value);
148
149	greg	2.2	/* Wrapper for ezxml_set_attr() that strdup()s name/value. Value cannot be NULL */
150	greg	2.1	#define ezxml_set_attr_d(xml, name, value) \
151			ezxml_set_attr(ezxml_set_flag(xml, EZXML_DUP), strdup(name), strdup(value))
152
153	greg	2.2	/* sets a flag for the given tag and returns the tag */
154	greg	2.1	ezxml_t ezxml_set_flag(ezxml_t xml, short flag);
155
156	greg	2.2	/* removes a tag along with its subtags without freeing its memory */
157	greg	2.1	ezxml_t ezxml_cut(ezxml_t xml);
158
159	greg	2.2	/* inserts an existing tag into an ezxml structure */
160	greg	2.1	ezxml_t ezxml_insert(ezxml_t xml, ezxml_t dest, size_t off);
161
162	greg	2.2	/* Moves an existing tag to become a subtag of dest at the given offset from */
163			/* the start of dest's character content. Returns the moved tag. */
164	greg	2.1	#define ezxml_move(xml, dest, off) ezxml_insert(ezxml_cut(xml), dest, off)
165
166	greg	2.2	/* removes a tag along with all its subtags */
167	greg	2.1	#define ezxml_remove(xml) ezxml_free(ezxml_cut(xml))
168
169			#ifdef __cplusplus
170			}
171			#endif
172
173	greg	2.2	#endif /* _EZXML_H */