src/dom/string.h

   1 #ifndef EL_DOM_STRING_H
   2 #define EL_DOM_STRING_H
   3
   4 #include "util/memory.h"
   5
   6 /* For now DOM has it's own little string library. Mostly because there are
   7  * some memory overhead associated with util/string's block-based allocation
   8  * scheme which is optimized for building strings and quickly dispose of it.
   9  * Also, at some point we need to switch to use mainly UTF-8 strings for DOM
  10  * and it needs to be possible to adapt the string library to that. --jonas */
  11
  12 struct dom_string {
  13         unsigned int length;
  14         unsigned char *string;
  15 };
  16
  17 #define INIT_DOM_STRING(strvalue, strlength) \
  18         { (strlength), (strvalue) }
  19
  20 #define STATIC_DOM_STRING(strvalue) \
  21         { sizeof(strvalue) - 1, (strvalue) }
  22
  23 static inline void
  24 set_dom_string(struct dom_string *string, unsigned char *value, size_t length)
  25 {
  26         string->string = value;
  27         string->length = length == -1 ? strlen(value) : length;
  28 }
  29
  30 static inline int
  31 dom_string_casecmp(const struct dom_string *string1, const struct dom_string *string2)
  32 {
  33         size_t length = int_min(string1->length, string2->length);
  34         size_t string_diff = strncasecmp(string1->string, string2->string, length);
  35
  36         /* If the lengths or strings don't match strncasecmp() does the
  37          * job else return which ever is bigger. */
  38         return string_diff ? string_diff : string1->length - string2->length;
  39 }
  40
  41 static inline int
  42 dom_string_ncasecmp(struct dom_string *string1, struct dom_string *string2, size_t length)
  43 {
  44         return strncasecmp(string1->string, string2->string, length);
  45 }
  46
  47 #define copy_dom_string(string1, string2) \
  48         set_dom_string(string1, (string2)->string, (string2)->length)
  49
  50 static inline struct dom_string *
  51 add_to_dom_string(struct dom_string *string, unsigned char *str, size_t len)
  52 {
  53         unsigned char *newstring;
  54
  55         newstring = mem_realloc(string->string, string->length + len + 1);
  56         if (!newstring)
  57                 return NULL;
  58
  59         string->string = newstring;
  60         memcpy(string->string + string->length, str, len);
  61         string->length += len;
  62         string->string[string->length] = 0;
  63
  64         return string;
  65 }
  66
  67 #define init_dom_string(string, str, len) add_to_dom_string(string, str, len)
  68
  69 #define is_dom_string_set(str) ((str)->string && (str)->length)
  70
  71 #define done_dom_string(str) \
  72         do { mem_free_set(&(str)->string, NULL); (str)->length = 0; } while (0)
  73
  74 #define isquote(c)      ((c) == '"' || (c) == '\'')
  75
  76 #endif