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Review libc dependencies and remove when possible

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Just for clarification, no plans to remove libc dependency, just did some code analysis to see how much raylib depend on stardard C library. My conclusions:

 - stdlib.h: primary dependency is for malloc() and free()
 - stdio.h: primary dependency is for FILE access, maybe it could go through a custom ABI?
 - string.h: just around 8 functions required
 - math.h: just around 8 functions required
 - others: 1-2 functions required for some other headers
This commit is contained in:
Ray 2020-02-04 16:55:24 +01:00
parent 3cd9e3896a
commit b5fe41f41a
11 changed files with 73 additions and 67 deletions
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7
src/gestures.h
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@ -152,8 +152,7 @@ float GetGesturePinchAngle(void); // Get gesture pinch ang
#include <sys/time.h> // Required for: timespec
#include <time.h> // Required for: clock_gettime()
#include <math.h> // Required for: atan2(), sqrt()
#include <stdint.h> // Required for: uint64_t
#include <math.h> // Required for: sqrtf(), atan2f()
#endif
#if defined(__APPLE__) // macOS also defines __MACH__
@ -533,7 +532,7 @@ static double GetCurrentTime(void)
// NOTE: Only for Linux-based systems
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
uint64_t nowTime = (uint64_t)now.tv_sec*1000000000LLU + (uint64_t)now.tv_nsec; // Time in nanoseconds
(unsigned long long int) nowTime = ((unsigned long long int))now.tv_sec*1000000000LLU + ((unsigned long long int))now.tv_nsec; // Time in nanoseconds
time = ((double)nowTime/1000000.0); // Time in miliseconds
#endif
@ -549,7 +548,7 @@ static double GetCurrentTime(void)
// NOTE: OS X does not have clock_gettime(), using clock_get_time()
clock_get_time(cclock, &now);
mach_port_deallocate(mach_task_self(), cclock);
uint64_t nowTime = (uint64_t)now.tv_sec*1000000000LLU + (uint64_t)now.tv_nsec; // Time in nanoseconds
(unsigned long long int) nowTime = ((unsigned long long int))now.tv_sec*1000000000LLU + ((unsigned long long int))now.tv_nsec; // Time in nanoseconds
time = ((double)nowTime/1000000.0); // Time in miliseconds
#endif