linux/tools/perf/util/strlist.c
Namhyung Kim 7d16c63423 perf tools: Fix build error due to zfree() cast
It failed to build perf on my ubuntu 10.04 box (gcc 4.4.3):

    CC       util/strlist.o
  cc1: warnings being treated as errors
  util/strlist.c: In function ‘str_node__delete’:
  util/strlist.c:42: error: dereferencing type-punned pointer will break strict-aliasing rules
  util/strlist.c:42: error: dereferencing type-punned pointer will break strict-aliasing rules
    CC       util/strfilter.o
  make: *** [util/strlist.o] Error 1

    CC       util/srcline.o
  cc1: warnings being treated as errors
  util/srcline.c: In function ‘addr2line_init’:
  util/srcline.c:132: error: dereferencing type-punned pointer will break strict-aliasing rules
  util/srcline.c:132: error: dereferencing type-punned pointer will break strict-aliasing rules
  util/srcline.c: In function ‘addr2line_cleanup’:
  util/srcline.c:143: error: dereferencing type-punned pointer will break strict-aliasing rules
  util/srcline.c:143: error: dereferencing type-punned pointer will break strict-aliasing rules
  make: *** [util/srcline.o] Error 1

It seems it only allows to remove 'const' qualifier.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung.kim@lge.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lkml.kernel.org/r/1389276479-9047-1-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-01-15 15:10:04 -03:00

174 lines
3.5 KiB
C

/*
* (c) 2009 Arnaldo Carvalho de Melo <acme@redhat.com>
*
* Licensed under the GPLv2.
*/
#include "strlist.h"
#include "util.h"
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
static
struct rb_node *strlist__node_new(struct rblist *rblist, const void *entry)
{
const char *s = entry;
struct rb_node *rc = NULL;
struct strlist *strlist = container_of(rblist, struct strlist, rblist);
struct str_node *snode = malloc(sizeof(*snode));
if (snode != NULL) {
if (strlist->dupstr) {
s = strdup(s);
if (s == NULL)
goto out_delete;
}
snode->s = s;
rc = &snode->rb_node;
}
return rc;
out_delete:
free(snode);
return NULL;
}
static void str_node__delete(struct str_node *snode, bool dupstr)
{
if (dupstr)
zfree((char **)&snode->s);
free(snode);
}
static
void strlist__node_delete(struct rblist *rblist, struct rb_node *rb_node)
{
struct strlist *slist = container_of(rblist, struct strlist, rblist);
struct str_node *snode = container_of(rb_node, struct str_node, rb_node);
str_node__delete(snode, slist->dupstr);
}
static int strlist__node_cmp(struct rb_node *rb_node, const void *entry)
{
const char *str = entry;
struct str_node *snode = container_of(rb_node, struct str_node, rb_node);
return strcmp(snode->s, str);
}
int strlist__add(struct strlist *slist, const char *new_entry)
{
return rblist__add_node(&slist->rblist, new_entry);
}
int strlist__load(struct strlist *slist, const char *filename)
{
char entry[1024];
int err;
FILE *fp = fopen(filename, "r");
if (fp == NULL)
return errno;
while (fgets(entry, sizeof(entry), fp) != NULL) {
const size_t len = strlen(entry);
if (len == 0)
continue;
entry[len - 1] = '\0';
err = strlist__add(slist, entry);
if (err != 0)
goto out;
}
err = 0;
out:
fclose(fp);
return err;
}
void strlist__remove(struct strlist *slist, struct str_node *snode)
{
rblist__remove_node(&slist->rblist, &snode->rb_node);
}
struct str_node *strlist__find(struct strlist *slist, const char *entry)
{
struct str_node *snode = NULL;
struct rb_node *rb_node = rblist__find(&slist->rblist, entry);
if (rb_node)
snode = container_of(rb_node, struct str_node, rb_node);
return snode;
}
static int strlist__parse_list_entry(struct strlist *slist, const char *s)
{
if (strncmp(s, "file://", 7) == 0)
return strlist__load(slist, s + 7);
return strlist__add(slist, s);
}
int strlist__parse_list(struct strlist *slist, const char *s)
{
char *sep;
int err;
while ((sep = strchr(s, ',')) != NULL) {
*sep = '\0';
err = strlist__parse_list_entry(slist, s);
*sep = ',';
if (err != 0)
return err;
s = sep + 1;
}
return *s ? strlist__parse_list_entry(slist, s) : 0;
}
struct strlist *strlist__new(bool dupstr, const char *list)
{
struct strlist *slist = malloc(sizeof(*slist));
if (slist != NULL) {
rblist__init(&slist->rblist);
slist->rblist.node_cmp = strlist__node_cmp;
slist->rblist.node_new = strlist__node_new;
slist->rblist.node_delete = strlist__node_delete;
slist->dupstr = dupstr;
if (list && strlist__parse_list(slist, list) != 0)
goto out_error;
}
return slist;
out_error:
free(slist);
return NULL;
}
void strlist__delete(struct strlist *slist)
{
if (slist != NULL)
rblist__delete(&slist->rblist);
}
struct str_node *strlist__entry(const struct strlist *slist, unsigned int idx)
{
struct str_node *snode = NULL;
struct rb_node *rb_node;
rb_node = rblist__entry(&slist->rblist, idx);
if (rb_node)
snode = container_of(rb_node, struct str_node, rb_node);
return snode;
}