btrfs-progs: dump-super: check array_size in print_sys_chunk_array

[platform/upstream/btrfs-progs.git] / utils.c

diff --git a/utils.c b/utils.c
index e7bbefb..d2489e7 100644 (file)
--- a/utils.c
+++ b/utils.c
@@ -2266,6 +2266,32 @@ unsigned int get_unit_mode_from_arg(int *argc, char *argv[], int df_mode)
        return unit_mode;
 }
 
+u64 div_factor(u64 num, int factor)
+{
+       if (factor == 10)
+               return num;
+       num *= factor;
+       num /= 10;
+       return num;
+}
+/*
+ * Get the length of the string converted from a u64 number.
+ *
+ * Result is equal to log10(num) + 1, but without the use of math library.
+ */
+int count_digits(u64 num)
+{
+       int ret = 0;
+
+       if (num == 0)
+               return 1;
+       while (num > 0) {
+               ret++;
+               num /= 10;
+       }
+       return ret;
+}
+
 int string_is_numerical(const char *str)
 {
        if (!str)
@@ -2279,6 +2305,15 @@ int string_is_numerical(const char *str)
        return 1;
 }
 
+int prefixcmp(const char *str, const char *prefix)
+{
+       for (; ; str++, prefix++)
+               if (!*prefix)
+                       return 0;
+               else if (*str != *prefix)
+                       return (unsigned char)*prefix - (unsigned char)*str;
+}
+
 /* Subvolume helper functions */
 /*
  * test if name is a correct subvolume name
@@ -2397,6 +2432,7 @@ out:
        return ret;
 }
 
+/* Set the seed manually */
 void init_rand_seed(u64 seed)
 {
        int i;
@@ -2446,6 +2482,7 @@ u32 rand_u32(void)
        return (u32)jrand48(rand_seed);
 }
 
+/* Return random number in range [0, upper) */
 unsigned int rand_range(unsigned int upper)
 {
        __init_seed();
@@ -2456,6 +2493,31 @@ unsigned int rand_range(unsigned int upper)
        return (unsigned int)(jrand48(rand_seed) % upper);
 }
 
+int rand_int(void)
+{
+       return (int)(rand_u32());
+}
+
+u64 rand_u64(void)
+{
+       u64 ret = 0;
+
+       ret += rand_u32();
+       ret <<= 32;
+       ret += rand_u32();
+       return ret;
+}
+
+u16 rand_u16(void)
+{
+       return (u16)(rand_u32());
+}
+
+u8 rand_u8(void)
+{
+       return (u8)(rand_u32());
+}
+
 void btrfs_config_init(void)
 {
 }