lib/sstring.c

   1 /* sstring.h - Declaration of "static strings" functions */
   2
   3 #include "sstring.h"
   4 #include "../core/nsmalloc.h"
   5
   6 #include <assert.h>
   7 #include <string.h>
   8
   9 sstring *getsstring(const char *inputstr, int maxlen) {
  10   sstring *retval = NULL;
  11   int length;
  12
  13   /* getsstring() on a NULL pointer returns a NULL sstring.. */
  14   if (inputstr == NULL)
  15     return NULL;
  16
  17   if (inputstr[0] == '\0')
  18     return NULL;
  19
  20   length = strlen(inputstr) + 1;
  21
  22   if (length > maxlen)
  23     length = maxlen + 1;
  24
  25   assert(length <= SSTRING_MAX + 1);
  26
  27   retval = nsmalloc(POOL_SSTRING, sizeof(sstring) + length);
  28
  29   retval->length = length - 1;
  30   strncpy(retval->content, inputstr, length - 1);
  31   retval->content[length - 1] = '\0';
  32
  33   return retval;
  34 }
  35
  36 void freesstring(sstring *inval) {
  37   nsfree(POOL_SSTRING, inval);
  38 }
  39
  40 int sstringcompare(sstring *ss1, sstring *ss2) {
  41   if (ss1->length != ss2->length)
  42     return -1;
  43
  44   return strncmp(ss1->content, ss2->content, ss1->length);
  45 }