refactor, improve exception message

1 files changed, 40 insertions, 21 deletions

diff --git a/include/lib.h b/include/lib.h
index 43b95a6..1b6d1f4 100644
--- a/include/lib.h
+++ b/include/lib.h
@@ -1,92 +1,111 @@
 #pragma once
 
+#include <stddef.h>
+
 /**
  * The  memcmp() function compares the first n bytes (each interpreted as unsigned char) of the memory
  * areas s1 and s2.
  */
-extern int memcmp(const void *restrict s1, const void *restrict s2, unsigned long n);
+int memcmp(const void *restrict s1, const void *restrict s2, unsigned long n);
 
 /**
  * The  memcpy()  function  copies n bytes from memory area src to memory area dest.
  * The memory areas must not overlap.
  */
-extern void *memcpy(void *restrict dest, const void *restrict src, unsigned long n);
+void *memcpy(void *restrict dest, const void *restrict src, unsigned long n);
 
 /**
  * The  memmove()  function copies n bytes from memory area src to memory area dest.  The memory areas
  * may overlap: copying takes place as though the bytes in src are first copied into a temporary array
  * that does not overlap src or dest, and the bytes are then copied from the temporary array to dest.
  */
-extern void *memmove(void *dest, const void *src, unsigned long n);
+void *memmove(void *dest, const void *src, unsigned long n);
 
 /**
  * The  memset() function fills the first n bytes of the memory area pointed to by s with the constant
  * byte c.
  */
-extern void *memset(void *restrict dest, int c, unsigned long n);
+void *memset(void *restrict dest, int c, unsigned long n);
 
 /**
  * The  strcmp()  function  compares  the two strings s1 and s2.  The locale is not taken into account
  * (for a locale-aware comparison, see strcoll(3)).  The comparison is done using unsigned characters.
  */
-extern int strncmp(const char *restrict s1, const char *restrict s2, unsigned long n);
+int strncmp(const char *restrict s1, const char *restrict s2, unsigned long n);
 
 /**
  * Copys the string pointed to by src , into a string at the buffer pointer to by dest.
  * The dest buffer must be long enough to hold src.
  */
-extern char *strcpy(char *restrict dest, const char *restrict src);
+char *strcpy(char *restrict dest, const char *restrict src);
 
 /**
  * Copys the string pointed to by src , into a string at the buffer pointer to by dest.
  * The dest buffer must be long enough to hold src or size n.
  */
-extern char *strncpy(char *restrict dest, const char *restrict src, unsigned long n);
+char *strncpy(char *restrict dest, const char *restrict src, unsigned long n);
+
+/**
+ * Calculates the length of the string pointed to by str, excluding
+ * the terminating null byte
+ * @param str - the string pointer
+ * @returns the length of the string in bytes
+ */
+size_t strlen(const char *str);
+
+/**
+ * Concatenate the string pointed to by src after the string pointed
+ * to by dst.
+ * @param dst - the pointer to the destination string
+ * @param src - the pointer to the source string
+ * @returns dst
+ */
+char *strcat(char *restrict dst, const char *restrict src);
 
 /**
  * @returns 1 if c is a space
  */
-extern int isspace(int c);
+int isspace(int c);
 
 /**
  * @returns 1 if c is a digit (0 - 9)
  */
-extern int isdigit(int c);
+int isdigit(int c);
 
 /**
  * converts single digit int to base 36
  * @param i - int
  * @returns c - base 36 char
  */
-extern char itoc(int i);
+char itoc(int i);
 
 /**
  * converts single base 36 chat into int
  * @param c - base 36 char
  * @returns i - int
  */
-extern int ctoi(char c);
+int ctoi(char c);
 
 /**
  * Converts the initial portiion of the string pointed to by s to int.
  * @param s - the string to convert
  * @returns the number inside s or 0 on error
  */
-extern int atoi(const char* s);
+int atoi(const char* s);
 
 /**
  * Converts the initial portiion of the string pointed to by s to long.
  * @param s - the string to convert
  * @returns the number inside s or 0 on error
  */
-extern long int atol(const char* s);
+long int atol(const char* s);
 
 /**
  * Converts the initial portiion of the string pointed to by s to long long.
  * @param s - the string to convert
  * @returns the number inside s or 0 on error
  */
-extern long long int atoll(const char* s);
+long long int atoll(const char* s);
 
 /**
  * Converts a integer to asci inside a string with a given radix (base).
@@ -94,7 +113,7 @@ extern long long int atoll(const char* s);
  * @param buffer - the string buffer
  * @param radix - the base to convert
  */
-extern char *itoa(int n, char *buffer, int radix);
+char *itoa(int n, char *buffer, int radix);
 
 /**
  * Converts a long to asci inside a string with a given radix (base).
@@ -102,7 +121,7 @@ extern char *itoa(int n, char *buffer, int radix);
  * @param buffer - the string buffer
  * @param radix - the base to convert
  */
-extern char *ltoa(long int n, char *buffer, int radix);
+char *ltoa(long int n, char *buffer, int radix);
 
 /**
  * Converts a unsigned integer to asci inside a string with a given radix (base).
@@ -110,7 +129,7 @@ extern char *ltoa(long int n, char *buffer, int radix);
  * @param buffer - the string buffer
  * @param radix - the base to convert
  */
-extern char *utoa(unsigned int n, char *buffer, int radix);
+char *utoa(unsigned int n, char *buffer, int radix);
 
 /**
  * Converts a unsigned long to asci inside a string with a given radix (base).
@@ -118,7 +137,7 @@ extern char *utoa(unsigned int n, char *buffer, int radix);
  * @param buffer - the string buffer
  * @param radix - the base to convert
  */
-extern char *ultoa(unsigned long int n, char *buffer, int radix);
+char *ultoa(unsigned long int n, char *buffer, int radix);
 
 /**
  * Converts the string in str to an int value based on the given base.
@@ -128,7 +147,7 @@ extern char *ultoa(unsigned long int n, char *buffer, int radix);
  * @param base - the base to convert to
  * @returns 0 on error or success, error if endptr is still equal to str
  */
-extern int strtoi(const char *str, char **endptr, int base);
+int strtoi(const char *str, char **endptr, int base);
 
 /**
  * Converts the string in str to an long value based on the given base.
@@ -138,7 +157,7 @@ extern int strtoi(const char *str, char **endptr, int base);
  * @param base - the base to convert to
  * @returns 0 on error or success, error if endptr is still equal to str
  */
-extern long int strtol(const char *str, char **endptr, int base);
+long int strtol(const char *str, char **endptr, int base);
 
 /**
  * Converts the string in str to an long long value based on the given base.
@@ -148,4 +167,4 @@ extern long int strtol(const char *str, char **endptr, int base);
  * @param base - the base to convert to
  * @returns 0 on error or success, error if endptr is still equal to str
  */
-extern long long int strtoll(const char *str, char **endptr, int base);
+long long int strtoll(const char *str, char **endptr, int base);