Fixed keyboard bug where keypresses were not being registered, working on libreadline

[tpg/acess2.git] / Usermode / Libraries / libc.so_src / string.c

diff --git a/Usermode/Libraries/libc.so_src/string.c b/Usermode/Libraries/libc.so_src/string.c
index 07c2017..98692b2 100644 (file)
--- a/Usermode/Libraries/libc.so_src/string.c
+++ b/Usermode/Libraries/libc.so_src/string.c
@@ -34,6 +34,35 @@ EXPORT char *strcpy(char *dst, const char *src)
        return _dst;
 }
 
+/**
+ * \fn EXPORT char *strncpy(char *dst, const char *src)
+ * \brief Copy at most \a num characters from \a src to \a dst
+ * \return \a dst
+ */
+EXPORT char *strncpy(char *dst, const char *src, size_t num)
+{
+       char *to = dst;
+       while(*src && num--)    *to++ = *src++;
+       *to = '\0';
+       return dst;
+}
+
+/**
+ * \fn EXPORT char *strcat(char *dst, const char *src)
+ * \brief Append a string onto another
+ */
+EXPORT char *strcat(char *dst, const char *src)
+{
+       char    *to = dst;
+       // Find the end
+       while(*to)      to++;
+       // Copy
+       while(*src)     *to++ = *src++;
+       // End string
+       *to = '\0';
+       return dst;
+}
+
 /**
  * \fn EXPORT int strlen(const char *str)
  * \brief Get the length of a string
@@ -72,6 +101,52 @@ EXPORT char *strdup(const char *str)
        return ret;
 }
 
+/**
+ * \fn EXPORT char *strchr(char *str, int character)
+ * \brief Locate a character in a string
+ */
+EXPORT char *strchr(char *str, int character)
+{
+       while(*str)
+       {
+               if(*str == character)   return str;
+       }
+       return NULL;
+}
+
+/**
+ * \fn EXPORT char *strrchr(char *str, int character)
+ * \brief Locate the last occurance of a character in a string
+ */
+EXPORT char *strrchr(char *str, int character)
+{
+        int    i;
+       i = strlen(str)-1;
+       while(i--)
+       {
+               if(str[i] == character) return &str[i];
+       }
+       return NULL;
+}
+
+/**
+ * \fn EXPORT char *strstr(char *str1, const char *str2)
+ * \brief Search a \a str1 for the first occurance of \a str2
+ */
+EXPORT char *strstr(char *str1, const char *str2)
+{
+       const char      *test = str2;
+       
+       while(*str1)
+       {
+               if(*test == '\0')       return str1;
+               if(*str1 == *test)      test++;
+               else    test = str2;
+               str1 ++;
+       }
+       return NULL;
+}
+
 // --- Memory ---
 /**
  * \fn EXPORT void *memset(void *dest, int val, size_t num)
@@ -111,3 +186,40 @@ EXPORT void *memmove(void *dest, const void *src, size_t count)
        for(;count--;) *dp++ = *sp++;
     return dest;
 }
+
+/**
+ * \fn EXPORT int memcmp(const void *mem1, const void *mem2, size_t count)
+ * \brief Compare two regions of memory
+ * \param mem1 Region 1
+ * \param mem2 Region 2
+ * \param count        Number of bytes to check
+ */
+EXPORT int memcmp(const void *mem1, const void *mem2, size_t count)
+{
+       while(count--)
+       {
+               if( *(unsigned char*)mem1 != *(unsigned char*)mem2 )
+                       return *(unsigned char*)mem1 - *(unsigned char*)mem2;
+               mem1 ++;
+               mem2 ++;
+       }
+       return 0;
+}
+
+/**
+ * \fn EXPORT void *memchr(void *ptr, int value, size_t num)
+ * \brief Locates the first occurence of \a value starting at \a ptr
+ * \param ptr  Starting memory location
+ * \param value        Value to find
+ * \param num  Size of memory area to check
+ */
+EXPORT void *memchr(void *ptr, int value, size_t num)
+{
+       while(num--)
+       {
+               if( *(unsigned char*)ptr == (unsigned char)value )
+                       return ptr;
+               ptr ++;
+       }
+       return NULL;
+}