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How to printf uint64_t? Fails with: “spurious trailing ‘%’ in format”
I wrote a very simple test code of printf uint64_t:
3 Answers
3
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iPhone Data Usage Tracking/Monitoring
...erence between two readings. This is because ifi_obytes and ifi_ibytes are uint_32 and their max value is 4294967295.
Also, I recommend using unsigned ints for the variables containing the data sent and received. Regular ints have half the max value of an unsigned integer, so when adding ifi_obytes...
Create a pointer to two-dimensional array
...
Here you wanna make a pointer to the first element of the array
uint8_t (*matrix_ptr)[20] = l_matrix;
With typedef, this looks cleaner
typedef uint8_t array_of_20_uint8_t[20];
array_of_20_uint8_t *matrix_ptr = l_matrix;
Then you can enjoy life again :)
matrix_ptr[0][1] = ...;
Bewa...
printf format specifiers for uint32_t and size_t
...ning splint I get the following: 1) printf (%u) expects unsigned int gets uint32_t: i 2) printf (%u) expects unsigned int gets size_t: k
– ant2009
Jul 2 '10 at 18:45
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How to measure time in milliseconds using ANSI C?
...m interested in measuring
clock_gettime(CLOCK_MONOTONIC, &end);
uint64_t timeElapsed = timespecDiff(&end, &start);
}
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How to detect total available/free disk space on the iPhone/iPad device?
... them.
Original answer:
I found the following solution working for me:
-(uint64_t)getFreeDiskspace {
uint64_t totalSpace = 0;
uint64_t totalFreeSpace = 0;
NSError *error = nil;
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
...
OceanBase使用libeasy原理源码分析：服务器端 - 数据库(内核) - 清泛网 - ...
...um;<br> //如果为1，则所有线程可以监听同一个地址
uint8_t reuseport : 1;
// 监听地址
easy_addr_t addr;
//各种回调函数的集合
easy_io_handler_pt *handler;
// 多个io线程竞争listen的锁
easy_atomi...
How do I base64 encode (decode) in C?
... return NULL;
for (int i = 0, j = 0; i < input_length;) {
uint32_t octet_a = i < input_length ? (unsigned char)data[i++] : 0;
uint32_t octet_b = i < input_length ? (unsigned char)data[i++] : 0;
uint32_t octet_c = i < input_length ? (unsigned char)data[i++] :...
Quickly find whether a value is present in a C array?
... the last entry in the array, then return true
Return false
bool check(uint32_t theArray[], uint32_t compareVal)
{
uint32_t i;
uint32_t x = theArray[SIZE-1];
if (x == compareVal)
return true;
theArray[SIZE-1] = compareVal;
for (i = 0; theArray[i] != compareVal; i++);
...
How do I detect unsigned integer multiply overflow?
...the largest operand's highest one-bit. For example:
bool addition_is_safe(uint32_t a, uint32_t b) {
size_t a_bits=highestOneBitPosition(a), b_bits=highestOneBitPosition(b);
return (a_bits<32 && b_bits<32);
}
For multiplication, any two operands will result in (at most) the s...