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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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16
src/core.c
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@@ -151,14 +151,12 @@
#define SUPPORT_HIGH_DPI // Force HighDPI support on macOS
#endif
#include <stdio.h> // Standard input / output lib
#include <stdlib.h> // Required for: srand(), rand(), atexit()
#include <stdint.h> // Required for: typedef unsigned long long int uint64_t, used by hi-res timer
#include <stdio.h> // Required for: FILE, fopen(), fseek(), fread(), fwrite(), fclose() [Used in StorageSaveValue()/StorageLoadValue()]
#include <string.h> // Required for: strrchr(), strcmp(), strlen()
#include <time.h> // Required for: time() - Android/RPI hi-res timer (NOTE: Linux only!)
#include <math.h> // Required for: tan() [Used in BeginMode3D() to set perspective]
#include <string.h> // Required for: strrchr(), strcmp()
//#include <errno.h> // Macros for reporting and retrieving error conditions through error codes
#include <ctype.h> // Required for: tolower() [Used in IsFileExtension()]
#include <math.h> // Required for: tan() [Used in BeginMode3D()]
#include <sys/stat.h> // Required for stat() [Used in GetLastWriteTime()]
#if (defined(PLATFORM_DESKTOP) || defined(PLATFORM_UWP)) && defined(_WIN32) && (defined(_MSC_VER) || defined(__TINYC__))
@@ -1635,7 +1633,7 @@ double GetTime(void)
#if defined(PLATFORM_ANDROID) || defined(PLATFORM_RPI)
struct timespec ts;
clock_gettime(CLOCK_MONOTONIC, &ts);
uint64_t time = (uint64_t)ts.tv_sec*1000000000LLU + (uint64_t)ts.tv_nsec;
unsigned long long int time = (unsigned long long int)ts.tv_sec*1000000000LLU + (unsigned long long int)ts.tv_nsec;
return (double)(time - CORE.Time.base)*1e-9; // Elapsed time since InitTimer()
#endif
@@ -2205,7 +2203,7 @@ int StorageLoadValue(int position)
// Get file size
fseek(storageFile, 0, SEEK_END);
int fileSize = ftell(storageFile); // Size in bytes
rewind(storageFile);
fseek(storageFile, 0, SEEK_SET); // Reset file pointer
if (fileSize < (position*4)) TRACELOG(LOG_WARNING, "Storage position could not be found");
else
@@ -3349,7 +3347,7 @@ static void InitTimer(void)
if (clock_gettime(CLOCK_MONOTONIC, &now) == 0) // Success
{
CORE.Time.base = (uint64_t)now.tv_sec*1000000000LLU + (uint64_t)now.tv_nsec;
CORE.Time.base = (unsigned long long int)now.tv_sec*1000000000LLU + (unsigned long long int)now.tv_nsec;
}
else TRACELOG(LOG_WARNING, "No hi-resolution timer available");
#endif