lib/sstring-valgrind.c

   1 #define COMPILING_SSTRING
   2 #include "sstring.h"
   3
   4 #include "../core/hooks.h"
   5 #include "../core/nsmalloc.h"
   6 #include "../core/error.h"
   7
   8 #include <stdio.h>
   9
  10 #include <assert.h>
  11 #include <stdlib.h>
  12 #define __USE_GNU
  13 #include <string.h>
  14
  15 typedef struct sstringlist {
  16   struct sstringlist *prev;
  17   struct sstringlist *next;
  18   sstring s[];
  19 } sstringlist;
  20
  21 static sstringlist *head;
  22
  23 void initsstring() {
  24 }
  25
  26 void finisstring() {
  27   sstringlist *s, *sn;
  28
  29   /* here we deliberately don't free the pointers so valgrind can tell us where they were allocated, in theory */
  30
  31   for(s=head;s;s=sn) {
  32     sn = s->next;
  33     s->next = NULL;
  34     s->prev = NULL;
  35
  36     Error("sstring", ERR_WARNING, "sstring of length %d still allocated: %s", s->s->u.l.length, s->s->content);
  37   }
  38
  39   head = NULL;
  40 }
  41
  42 sstring *getsstring(const char *inputstr, int maxlen) {
  43   sstringlist *s;
  44   size_t len;
  45   char *p;
  46
  47   if(!inputstr)
  48     return NULL;
  49
  50   for(p=(char *)inputstr;*p&&maxlen;maxlen--,p++)
  51     ; /* empty */
  52
  53   len = p - inputstr;
  54   s=(sstringlist *)malloc(sizeof(sstringlist) + sizeof(sstring));
  55
  56   s->s->u.l.length = len;
  57   s->s->content=(char *)malloc(len + 1);
  58
  59   memcpy(s->s->content, inputstr, len);
  60   s->s->content[len] = '\0';
  61
  62   s->next = head;
  63   s->prev = NULL;
  64   if(head)
  65     head->prev = s;
  66   head = s;
  67
  68   return s->s;
  69 }
  70
  71 void freesstring(sstring *inval) {
  72   sstringlist *s;
  73   if(!inval)
  74     return;
  75
  76   s = (sstringlist *)inval - 1;
  77
  78   if(s->prev) {
  79     s->prev->next = s->next;
  80     if(s->next)
  81       s->next->prev = s->prev;
  82   } else {
  83     head = s->next;
  84     if(head)
  85       head->prev = NULL;
  86   }
  87
  88   free(inval->content);
  89   free(s);
  90 }