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elinks/src/dom/string.h
2006-02-10 01:25:48 +01:00

77 lines
2.2 KiB
C

#ifndef EL_DOM_STRING_H
#define EL_DOM_STRING_H
#include "util/memory.h"
/* For now DOM has it's own little string library. Mostly because there are
* some memory overhead associated with util/string's block-based allocation
* scheme which is optimized for building strings and quickly dispose of it.
* Also, at some point we need to switch to use mainly UTF-8 strings for DOM
* and it needs to be possible to adapt the string library to that. --jonas */
struct dom_string {
unsigned int length;
unsigned char *string;
};
#define INIT_DOM_STRING(strvalue, strlength) \
{ (strlength), (strvalue) }
#define STATIC_DOM_STRING(strvalue) \
{ sizeof(strvalue) - 1, (strvalue) }
static inline void
set_dom_string(struct dom_string *string, unsigned char *value, size_t length)
{
string->string = value;
string->length = length == -1 ? strlen(value) : length;
}
static inline int
dom_string_casecmp(const struct dom_string *string1, const struct dom_string *string2)
{
size_t length = int_min(string1->length, string2->length);
size_t string_diff = strncasecmp(string1->string, string2->string, length);
/* If the lengths or strings don't match strncasecmp() does the
* job else return which ever is bigger. */
return string_diff ? string_diff : string1->length - string2->length;
}
static inline int
dom_string_ncasecmp(struct dom_string *string1, struct dom_string *string2, size_t length)
{
return strncasecmp(string1->string, string2->string, length);
}
#define copy_dom_string(string1, string2) \
set_dom_string(string1, (string2)->string, (string2)->length)
static inline struct dom_string *
add_to_dom_string(struct dom_string *string, unsigned char *str, size_t len)
{
unsigned char *newstring;
newstring = mem_realloc(string->string, string->length + len + 1);
if (!newstring)
return NULL;
string->string = newstring;
memcpy(string->string + string->length, str, len);
string->length += len;
string->string[string->length] = 0;
return string;
}
#define init_dom_string(string, str, len) add_to_dom_string(string, str, len)
#define is_dom_string_set(str) ((str)->string && (str)->length)
#define done_dom_string(str) \
do { mem_free_set(&(str)->string, NULL); (str)->length = 0; } while (0)
#define isquote(c) ((c) == '"' || (c) == '\'')
#endif