/* ezxml.h * * Copyright 2004-2006 Aaron Voisine * * 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 #include #include #include #ifdef HAVE_UNISTD_H #include #endif #ifdef __cplusplus extern "C" { #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*/