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Add comments to the rt-thread\components\libc\compilers\common\cstdlib.c #8209

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merged 2 commits into from
Nov 1, 2023
Merged

Add comments to the rt-thread\components\libc\compilers\common\cstdlib.c #8209

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60aaade
Add comments to the rt-thread\components\libc\compilers\common\cstdli…
strongYourSister Oct 31, 2023
f32e0c7
restore indentation to the rt-thread\components\libc\compilers\common…
strongYourSister Nov 1, 2023
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63 changes: 55 additions & 8 deletions components/libc/compilers/common/cstdlib.c
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Original file line number Diff line number Diff line change
Expand Up @@ -14,6 +14,11 @@
#define DBG_LVL DBG_INFO
#include <rtdbg.h>

/**
* @brief This function is called when a thread exits. It can detach the thread and perform cleanup.
*
* @param status is the exit status of the thread.
*/
void __rt_libc_exit(int status)
{
rt_thread_t self = rt_thread_self();
Expand All @@ -22,7 +27,7 @@ void __rt_libc_exit(int status)
{
LOG_W("thread:%s exit:%d!", self->parent.name, status);
#ifdef RT_USING_PTHREADS
if(self->pthread_data != RT_NULL)
if (self->pthread_data != RT_NULL)
{
extern void pthread_exit(void *value);
pthread_exit((void *)status);
Expand All @@ -36,6 +41,13 @@ void __rt_libc_exit(int status)
}

#ifdef RT_USING_MSH
/**
* @brief Execute a command using the Micro-Shell (MSH) subsystem.
*
* @param command is the command string to execute.
*
* @return Returns 0 after executing the command.
*/
int system(const char *command)
{
extern int msh_exec(char *cmd, rt_size_t length);
Expand All @@ -50,6 +62,15 @@ int system(const char *command)
RTM_EXPORT(system);
#endif /* RT_USING_MSH */

/**
* @brief Convert a long integer to a string representation with a specified radix.
*
* @param value is the long integer to convert.
* @param string is the destination string where the result will be stored.
* @param radix is the base of the number system to be used for conversion.
*
* @return Returns a pointer to the destination string.
*/
char *ltoa(long value, char *string, int radix)
{
char tmp[33];
Expand All @@ -61,12 +82,12 @@ char *ltoa(long value, char *string, int radix)

if (string == NULL)
{
return 0 ;
return 0;
}

if (radix > 36 || radix <= 1)
{
return 0 ;
return 0;
}

sign = (radix == 10 && value < 0);
Expand All @@ -84,7 +105,7 @@ char *ltoa(long value, char *string, int radix)
i = v % radix;
v = v / radix;
if (i < 10)
*tp++ = (char)(i+'0');
*tp++ = (char)(i + '0');
else
*tp++ = (char)(i + 'a' - 10);
}
Expand All @@ -100,12 +121,29 @@ char *ltoa(long value, char *string, int radix)
return string;
}

/**
* @brief Convert an integer to a string representation with a specified radix.
*
* @param value is the integer to convert.
* @param string is the destination string where the result will be stored.
* @param radix is the base of the number system to be used for conversion.
*
* @return Returns a pointer to the destination string.
*/
char *itoa(int value, char *string, int radix)
{
return ltoa(value, string, radix) ;
return ltoa(value, string, radix);
}


/**
* @brief Convert an unsigned long integer to a string representation with a specified radix.
*
* @param value is the unsigned long integer to convert.
* @param string is the destination string where the result will be stored.
* @param radix is the base of the number system to be used for conversion.
*
* @return Returns a pointer to the destination string.
*/
char *ultoa(unsigned long value, char *string, int radix)
{
char tmp[33];
Expand All @@ -129,7 +167,7 @@ char *ultoa(unsigned long value, char *string, int radix)
i = v % radix;
v = v / radix;
if (i < 10)
*tp++ = (char)(i+'0');
*tp++ = (char)(i + '0');
else
*tp++ = (char)(i + 'a' - 10);
}
Expand All @@ -143,7 +181,16 @@ char *ultoa(unsigned long value, char *string, int radix)
return string;
}

/**
* @brief Convert an unsigned integer to a string representation with a specified radix.
*
* @param value is the unsigned integer to convert.
* @param string is the destination string where the result will be stored.
* @param radix is the base of the number system to be used for conversion.
*
* @return Returns a pointer to the destination string.
*/
char *utoa(unsigned value, char *string, int radix)
{
return ultoa(value, string, radix) ;
return ultoa(value, string, radix);
}