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authorCristian Rodríguez <crrodriguez@opensuse.org>2013-04-01 03:08:05 -0300
committerZbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>2013-04-01 23:43:48 -0400
commit9607d9470eec07df817e58f64d312ccb5ac4cfcc (patch)
treed0d933b13ec47e4d22dcee3078af94e89a998e6e
parente5ec62c56963d997edaffa904af5dc45dac23988 (diff)
Always use our own MAX/MIN definitions
code in src/shared/macro.h only defined MAX/MIN in case they were not defined previously. however the MAX/MIN macros implemented in glibc are not of the "safe" kind but defined as: define MIN(a,b) (((a)<(b))?(a):(b)) define MAX(a,b) (((a)>(b))?(a):(b)) Avoid nasty side effects by using our own versions instead. Also fix the warnings derived from this change. [zj: - modify MAX3 macro to fix warning about _a shadowing _a, - do bootchart/svg.c too, - remove unused MIN3.]
-rw-r--r--src/bootchart/svg.c19
-rw-r--r--src/journal/journal-file.c2
-rw-r--r--src/libsystemd-bus/bus-socket.c2
-rw-r--r--src/shared/macro.h26
-rw-r--r--src/shared/prioq.c2
-rw-r--r--src/shared/util.c2
-rw-r--r--src/systemctl/systemctl.c12
7 files changed, 30 insertions, 35 deletions
diff --git a/src/bootchart/svg.c b/src/bootchart/svg.c
index 0fb9fffd9b..a4086c5227 100644
--- a/src/bootchart/svg.c
+++ b/src/bootchart/svg.c
@@ -44,9 +44,6 @@
#define kb_to_graph(m) ((m) * arg_scale_y * 0.0001)
#define to_color(n) (192.0 - ((n) * 192.0))
-#define max(x, y) (((x) > (y)) ? (x) : (y))
-#define min(x, y) (((x) < (y)) ? (x) : (y))
-
static char str[8092];
#define svg(a...) do { snprintf(str, 8092, ## a); fputs(str, of); fflush(of); } while (0)
@@ -441,8 +438,8 @@ static void svg_io_bi_bar(void) {
int stop;
double tot;
- start = max(i - ((range / 2) - 1), 0);
- stop = min(i + (range / 2), samples - 1);
+ start = MAX(i - ((range / 2) - 1), 0);
+ stop = MIN(i + (range / 2), samples - 1);
tot = (double)(blockstat[stop].bi - blockstat[start].bi)
/ (stop - start);
@@ -463,8 +460,8 @@ static void svg_io_bi_bar(void) {
double tot;
double pbi;
- start = max(i - ((range / 2) - 1), 0);
- stop = min(i + (range / 2), samples);
+ start = MAX(i - ((range / 2) - 1), 0);
+ stop = MIN(i + (range / 2), samples);
tot = (double)(blockstat[stop].bi - blockstat[start].bi)
/ (stop - start);
@@ -517,8 +514,8 @@ static void svg_io_bo_bar(void) {
int stop;
double tot;
- start = max(i - ((range / 2) - 1), 0);
- stop = min(i + (range / 2), samples - 1);
+ start = MAX(i - ((range / 2) - 1), 0);
+ stop = MIN(i + (range / 2), samples - 1);
tot = (double)(blockstat[stop].bi - blockstat[start].bi)
/ (stop - start);
@@ -539,8 +536,8 @@ static void svg_io_bo_bar(void) {
double tot;
double pbo;
- start = max(i - ((range / 2) - 1), 0);
- stop = min(i + (range / 2), samples);
+ start = MAX(i - ((range / 2) - 1), 0);
+ stop = MIN(i + (range / 2), samples);
tot = (double)(blockstat[stop].bo - blockstat[start].bo)
/ (stop - start);
diff --git a/src/journal/journal-file.c b/src/journal/journal-file.c
index 5b077be0da..a44e126c0e 100644
--- a/src/journal/journal-file.c
+++ b/src/journal/journal-file.c
@@ -1325,7 +1325,7 @@ int journal_file_append_entry(JournalFile *f, const dual_timestamp *ts, const st
#endif
/* alloca() can't take 0, hence let's allocate at least one */
- items = alloca(sizeof(EntryItem) * MAX(1, n_iovec));
+ items = alloca(sizeof(EntryItem) * MAX(1u, n_iovec));
for (i = 0; i < n_iovec; i++) {
uint64_t p;
diff --git a/src/libsystemd-bus/bus-socket.c b/src/libsystemd-bus/bus-socket.c
index 5b5a731233..c68c7bca68 100644
--- a/src/libsystemd-bus/bus-socket.c
+++ b/src/libsystemd-bus/bus-socket.c
@@ -455,7 +455,7 @@ static int bus_socket_read_auth(sd_bus *b) {
if (r != 0)
return r;
- n = MAX(256, b->rbuffer_size * 2);
+ n = MAX(256u, b->rbuffer_size * 2);
if (n > BUS_AUTH_SIZE_MAX)
n = BUS_AUTH_SIZE_MAX;
diff --git a/src/shared/macro.h b/src/shared/macro.h
index 898784ac83..4e5d0f4f2f 100644
--- a/src/shared/macro.h
+++ b/src/shared/macro.h
@@ -71,29 +71,27 @@ static inline size_t ALIGN_TO(size_t l, size_t ali) {
const typeof( ((type *)0)->member ) *__mptr = (ptr); \
(type *)( (char *)__mptr - offsetof(type,member) );})
-#ifndef MAX
-#define MAX(a,b) \
- __extension__ ({ \
- typeof(a) _a = (a); \
- typeof(b) _b = (b); \
- _a > _b ? _a : _b; \
+#undef MAX
+#define MAX(a,b) \
+ __extension__ ({ \
+ typeof(a) _a = (a); \
+ typeof(b) _b = (b); \
+ _a > _b ? _a : _b; \
})
-#endif
-#define MAX3(a,b,c) \
- MAX(MAX(a,b),c)
+#define MAX3(x,y,z) \
+ __extension__ ({ \
+ typeof(x) _c = MAX(x,y); \
+ MAX(_c, z); \
+ })
-#ifndef MIN
+#undef MIN
#define MIN(a,b) \
__extension__ ({ \
typeof(a) _a = (a); \
typeof(b) _b = (b); \
_a < _b ? _a : _b; \
})
-#endif
-
-#define MIN3(a,b,c) \
- MIN(MIN(a,b),c)
#ifndef CLAMP
#define CLAMP(x, low, high) \
diff --git a/src/shared/prioq.c b/src/shared/prioq.c
index 64c44aef82..a2205719b4 100644
--- a/src/shared/prioq.c
+++ b/src/shared/prioq.c
@@ -159,7 +159,7 @@ int prioq_put(Prioq *q, void *data, unsigned *idx) {
unsigned n;
struct prioq_item *j;
- n = MAX((q->n_items+1) * 2, 16);
+ n = MAX((q->n_items+1) * 2, 16u);
j = realloc(q->items, sizeof(struct prioq_item) * n);
if (!j)
return -ENOMEM;
diff --git a/src/shared/util.c b/src/shared/util.c
index b516b9b053..46c20bec9c 100644
--- a/src/shared/util.c
+++ b/src/shared/util.c
@@ -5862,7 +5862,7 @@ void* greedy_realloc(void **p, size_t *allocated, size_t need) {
if (*allocated >= need)
return *p;
- a = MAX(64, need * 2);
+ a = MAX(64u, need * 2);
q = realloc(*p, a);
if (!q)
return NULL;
diff --git a/src/systemctl/systemctl.c b/src/systemctl/systemctl.c
index 328b91bc35..6bd2e34f58 100644
--- a/src/systemctl/systemctl.c
+++ b/src/systemctl/systemctl.c
@@ -328,7 +328,7 @@ static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
if (!arg_full) {
unsigned basic_len;
- id_len = MIN(max_id_len, 25);
+ id_len = MIN(max_id_len, 25u);
basic_len = 5 + id_len + 5 + active_len + sub_len;
if (job_count)
basic_len += job_len + 1;
@@ -337,7 +337,7 @@ static void output_units_list(const struct unit_info *unit_infos, unsigned c) {
extra_len = columns() - basic_len;
/* Either UNIT already got 25, or is fully satisfied.
* Grant up to 25 to DESC now. */
- incr = MIN(extra_len, 25);
+ incr = MIN(extra_len, 25u);
desc_len += incr;
extra_len -= incr;
/* split the remaining space between UNIT and DESC,
@@ -463,7 +463,7 @@ static int get_unit_list(DBusConnection *bus, DBusMessage **reply,
if (*c >= n_units) {
struct unit_info *w;
- n_units = MAX(2 * *c, 16);
+ n_units = MAX(2 * *c, 16u);
w = realloc(*unit_infos, sizeof(struct unit_info) * n_units);
if (!w)
return log_oom();
@@ -543,7 +543,7 @@ static void output_unit_file_list(const UnitFileList *units, unsigned c) {
if (!arg_full) {
unsigned basic_cols;
- id_cols = MIN(max_id_len, 25);
+ id_cols = MIN(max_id_len, 25u);
basic_cols = 1 + id_cols + state_cols;
if (basic_cols < (unsigned) columns())
id_cols += MIN(columns() - basic_cols, max_id_len - id_cols);
@@ -657,7 +657,7 @@ static int list_unit_files(DBusConnection *bus, char **args) {
if (c >= n_units) {
UnitFileList *w;
- n_units = MAX(2*c, 16);
+ n_units = MAX(2*c, 16u);
w = realloc(units, sizeof(struct UnitFileList) * n_units);
if (!w)
return log_oom();
@@ -694,7 +694,7 @@ static int list_dependencies_print(const char *name, int level, unsigned int bra
int i;
_cleanup_free_ char *n = NULL;
size_t len = 0;
- size_t max_len = MAX(columns(),20);
+ size_t max_len = MAX(columns(),20u);
for (i = level - 1; i >= 0; i--) {
len += 2;