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authorPaul Kocialkowski <contact@paulk.fr>2014-07-26 18:49:31 +0200
committerPaul Kocialkowski <contact@paulk.fr>2014-07-26 18:49:31 +0200
commit379045ee0cc5d136639504cbf9c57de4ee9078d4 (patch)
tree6a1253d52f63bb3091a98399cff29e1a3615342e
parentbfb20b0c1fb891360524f02eed79c8dbe7278626 (diff)
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utils: Dedicated function for length/size
-rw-r--r--include/samsung-ipc.h4
-rw-r--r--samsung-ipc/utils.c53
2 files changed, 46 insertions, 11 deletions
diff --git a/include/samsung-ipc.h b/include/samsung-ipc.h
index 5be2ac9..3aa6808 100644
--- a/include/samsung-ipc.h
+++ b/include/samsung-ipc.h
@@ -139,8 +139,10 @@ int sysfs_value_read(const char *path);
int sysfs_value_write(const char *path, int value);
char *sysfs_string_read(const char *path, size_t length);
int sysfs_string_write(const char *path, const char *buffer, size_t length);
+size_t data2string_length(const void *data, size_t size);
char *data2string(const void *data, size_t size);
-void *string2data(const char *string, size_t *size_p);
+size_t string2data_size(const char *string);
+void *string2data(const char *string);
/*
* Samsung-IPC protocol
diff --git a/samsung-ipc/utils.c b/samsung-ipc/utils.c
index d6481c2..d0cc059 100644
--- a/samsung-ipc/utils.c
+++ b/samsung-ipc/utils.c
@@ -331,6 +331,18 @@ complete:
return rc;
}
+size_t data2string_length(const void *data, size_t size)
+{
+ size_t length;
+
+ if (data == NULL || size == 0)
+ return 0;
+
+ length = size * 2 + 1;
+
+ return length;
+}
+
char *data2string(const void *data, size_t size)
{
char *string;
@@ -341,7 +353,10 @@ char *data2string(const void *data, size_t size)
if (data == NULL || size == 0)
return NULL;
- length = size * 2 + 1;
+ length = data2string_length(data, size);
+ if (length == 0)
+ return NULL;
+
string = (char *) calloc(1, length);
p = string;
@@ -354,7 +369,27 @@ char *data2string(const void *data, size_t size)
return string;
}
-void *string2data(const char *string, size_t *size_p)
+size_t string2data_size(const char *string)
+{
+ size_t length;
+ size_t size;
+
+ if (string == NULL)
+ return 0;
+
+ length = strlen(string);
+ if (length == 0)
+ return 0;
+
+ if (length % 2 == 0)
+ size = length / 2;
+ else
+ size = (length - (length % 2)) / 2 + 1;
+
+ return size;
+}
+
+void *string2data(const char *string)
{
void *data;
size_t size;
@@ -372,13 +407,14 @@ void *string2data(const char *string, size_t *size_p)
if (length == 0)
return NULL;
- if (length % 2 == 0) {
- size = length / 2;
+ if (length % 2 == 0)
shift = 0;
- } else {
- size = (length - (length % 2)) / 2 + 1;
+ else
shift = 1;
- }
+
+ size = string2data_size(string);
+ if (size == 0)
+ return NULL;
data = calloc(1, size);
@@ -397,9 +433,6 @@ void *string2data(const char *string, size_t *size_p)
shift++;
}
- if (size_p != NULL)
- *size_p = size;
-
return data;
}