[kernel] move std libc related to rtklibc.h

1 files changed, 686 insertions, 0 deletions

diff --git a/src/klibc/kstdio.c b/src/klibc/kstdio.c
new file mode 100644
index 0000000000..8ed1a9298d
--- /dev/null
+++ b/src/klibc/kstdio.c
@@ -0,0 +1,686 @@
+/*
+ * Copyright (c) 2006-2024, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2024-03-10     Meco Man     the first version
+ */
+
+#include <rtdef.h>
+#include <rtcompiler.h>
+#include <rtklibc.h>
+#include <rtm.h>
+
+#define DBG_TAG           "kernel.stdio"
+#ifdef RT_DEBUG_DEVICE
+#define DBG_LVL           DBG_LOG
+#else
+#define DBG_LVL           DBG_WARNING
+#endif /* defined (RT_DEBUG_DEVICE) */
+#include <rtdbg.h>
+
+/* private function */
+#define _ISDIGIT(c)  ((unsigned)((c) - '0') < 10)
+
+/**
+ * @brief  This function will duplicate a string.
+ *
+ * @param  n is the string to be duplicated.
+ *
+ * @param  base is support divide instructions value.
+ *
+ * @return the duplicated string pointer.
+ */
+#ifdef RT_KPRINTF_USING_LONGLONG
+rt_inline int divide(unsigned long long *n, int base)
+#else
+rt_inline int divide(unsigned long *n, int base)
+#endif /* RT_KPRINTF_USING_LONGLONG */
+{
+    int res;
+
+    /* optimized for processor which does not support divide instructions. */
+#ifdef RT_KPRINTF_USING_LONGLONG
+    res = (int)((*n) % base);
+    *n = (long long)((*n) / base);
+#else
+    res = (int)((*n) % base);
+    *n = (long)((*n) / base);
+#endif
+
+    return res;
+}
+
+rt_inline int skip_atoi(const char **s)
+{
+    int i = 0;
+    while (_ISDIGIT(**s))
+        i = i * 10 + *((*s)++) - '0';
+
+    return i;
+}
+
+#define ZEROPAD     (1 << 0)    /* pad with zero */
+#define SIGN        (1 << 1)    /* unsigned/signed long */
+#define PLUS        (1 << 2)    /* show plus */
+#define SPACE       (1 << 3)    /* space if plus */
+#define LEFT        (1 << 4)    /* left justified */
+#define SPECIAL     (1 << 5)    /* 0x */
+#define LARGE       (1 << 6)    /* use 'ABCDEF' instead of 'abcdef' */
+
+static char *print_number(char *buf,
+                          char *end,
+#ifdef RT_KPRINTF_USING_LONGLONG
+                          unsigned long long  num,
+#else
+                          unsigned long  num,
+#endif /* RT_KPRINTF_USING_LONGLONG */
+                          int   base,
+                          int   qualifier,
+                          int   s,
+                          int   precision,
+                          int   type)
+{
+    char c = 0, sign = 0;
+#ifdef RT_KPRINTF_USING_LONGLONG
+    char tmp[64] = {0};
+#else
+    char tmp[32] = {0};
+#endif /* RT_KPRINTF_USING_LONGLONG */
+    int precision_bak = precision;
+    const char *digits = RT_NULL;
+    static const char small_digits[] = "0123456789abcdef";
+    static const char large_digits[] = "0123456789ABCDEF";
+    int i = 0;
+    int size = 0;
+
+    size = s;
+
+    digits = (type & LARGE) ? large_digits : small_digits;
+    if (type & LEFT)
+    {
+        type &= ~ZEROPAD;
+    }
+
+    c = (type & ZEROPAD) ? '0' : ' ';
+
+    /* get sign */
+    sign = 0;
+    if (type & SIGN)
+    {
+        switch (qualifier)
+        {
+        case 'h':
+            if ((rt_int16_t)num < 0)
+            {
+                sign = '-';
+                num = (rt_uint16_t)-num;
+            }
+            break;
+        case 'L':
+        case 'l':
+            if ((long)num < 0)
+            {
+                sign = '-';
+                num = (unsigned long)-num;
+            }
+            break;
+        case 0:
+        default:
+            if ((rt_int32_t)num < 0)
+            {
+                sign = '-';
+                num = (rt_uint32_t)-num;
+            }
+            break;
+        }
+
+        if (sign != '-')
+        {
+            if (type & PLUS)
+            {
+                sign = '+';
+            }
+            else if (type & SPACE)
+            {
+                sign = ' ';
+            }
+        }
+    }
+
+    if (type & SPECIAL)
+    {
+        if (base == 2 || base == 16)
+        {
+            size -= 2;
+        }
+        else if (base == 8)
+        {
+            size--;
+        }
+    }
+
+    i = 0;
+    if (num == 0)
+    {
+        tmp[i++] = '0';
+    }
+    else
+    {
+        while (num != 0)
+            tmp[i++] = digits[divide(&num, base)];
+    }
+
+    if (i > precision)
+    {
+        precision = i;
+    }
+    size -= precision;
+
+    if (!(type & (ZEROPAD | LEFT)))
+    {
+        if ((sign) && (size > 0))
+        {
+            size--;
+        }
+
+        while (size-- > 0)
+        {
+            if (buf < end)
+            {
+                *buf = ' ';
+            }
+
+            ++ buf;
+        }
+    }
+
+    if (sign)
+    {
+        if (buf < end)
+        {
+            *buf = sign;
+        }
+        -- size;
+        ++ buf;
+    }
+
+    if (type & SPECIAL)
+    {
+        if (base == 2)
+        {
+            if (buf < end)
+                *buf = '0';
+            ++ buf;
+            if (buf < end)
+                *buf = 'b';
+            ++ buf;
+        }
+        else if (base == 8)
+        {
+            if (buf < end)
+                *buf = '0';
+            ++ buf;
+        }
+        else if (base == 16)
+        {
+            if (buf < end)
+            {
+                *buf = '0';
+            }
+
+            ++ buf;
+            if (buf < end)
+            {
+                *buf = type & LARGE ? 'X' : 'x';
+            }
+            ++ buf;
+        }
+    }
+
+    /* no align to the left */
+    if (!(type & LEFT))
+    {
+        while (size-- > 0)
+        {
+            if (buf < end)
+            {
+                *buf = c;
+            }
+
+            ++ buf;
+        }
+    }
+
+    while (i < precision--)
+    {
+        if (buf < end)
+        {
+            *buf = '0';
+        }
+
+        ++ buf;
+    }
+
+    /* put number in the temporary buffer */
+    while (i-- > 0 && (precision_bak != 0))
+    {
+        if (buf < end)
+        {
+            *buf = tmp[i];
+        }
+
+        ++ buf;
+    }
+
+    while (size-- > 0)
+    {
+        if (buf < end)
+        {
+            *buf = ' ';
+        }
+
+        ++ buf;
+    }
+
+    return buf;
+}
+
+#if defined(__GNUC__) && !defined(__ARMCC_VERSION) /* GCC */
+#pragma GCC diagnostic push
+/* ignore warning: this statement may fall through */
+#pragma GCC diagnostic ignored "-Wimplicit-fallthrough"
+#endif /* defined(__GNUC__) && !defined(__ARMCC_VERSION) */
+/**
+ * @brief  This function will fill a formatted string to buffer.
+ *
+ * @param  buf is the buffer to save formatted string.
+ *
+ * @param  size is the size of buffer.
+ *
+ * @param  fmt is the format parameters.
+ *
+ * @param  args is a list of variable parameters.
+ *
+ * @return The number of characters actually written to buffer.
+ */
+rt_weak int rt_vsnprintf(char *buf, rt_size_t size, const char *fmt, va_list args)
+{
+#ifdef RT_KPRINTF_USING_LONGLONG
+    unsigned long long num = 0;
+#else
+    unsigned long num = 0;
+#endif /* RT_KPRINTF_USING_LONGLONG */
+    int i = 0, len = 0;
+    char *str = RT_NULL, *end = RT_NULL, c = 0;
+    const char *s = RT_NULL;
+
+    rt_uint8_t base = 0;            /* the base of number */
+    rt_uint8_t flags = 0;           /* flags to print number */
+    rt_uint8_t qualifier = 0;       /* 'h', 'l', or 'L' for integer fields */
+    rt_int32_t field_width = 0;     /* width of output field */
+    int precision = 0;      /* min. # of digits for integers and max for a string */
+
+    str = buf;
+    end = buf + size;
+
+    /* Make sure end is always >= buf */
+    if (end < buf)
+    {
+        end  = ((char *) - 1);
+        size = end - buf;
+    }
+
+    for (; *fmt ; ++fmt)
+    {
+        if (*fmt != '%')
+        {
+            if (str < end)
+            {
+                *str = *fmt;
+            }
+
+            ++ str;
+            continue;
+        }
+
+        /* process flags */
+        flags = 0;
+
+        while (1)
+        {
+            /* skips the first '%' also */
+            ++fmt;
+            if (*fmt == '-') flags |= LEFT;
+            else if (*fmt == '+') flags |= PLUS;
+            else if (*fmt == ' ') flags |= SPACE;
+            else if (*fmt == '#') flags |= SPECIAL;
+            else if (*fmt == '0') flags |= ZEROPAD;
+            else break;
+        }
+
+        /* get field width */
+        field_width = -1;
+        if (_ISDIGIT(*fmt))
+        {
+            field_width = skip_atoi(&fmt);
+        }
+        else if (*fmt == '*')
+        {
+            ++fmt;
+            /* it's the next argument */
+            field_width = va_arg(args, int);
+            if (field_width < 0)
+            {
+                field_width = -field_width;
+                flags |= LEFT;
+            }
+        }
+
+        /* get the precision */
+        precision = -1;
+        if (*fmt == '.')
+        {
+            ++fmt;
+            if (_ISDIGIT(*fmt))
+            {
+                precision = skip_atoi(&fmt);
+            }
+            else if (*fmt == '*')
+            {
+                ++fmt;
+                /* it's the next argument */
+                precision = va_arg(args, int);
+            }
+            if (precision < 0)
+            {
+                precision = 0;
+            }
+        }
+
+        qualifier = 0; /* get the conversion qualifier */
+
+        if (*fmt == 'h' || *fmt == 'l' ||
+#ifdef RT_KPRINTF_USING_LONGLONG
+            *fmt == 'L' ||
+#endif /* RT_KPRINTF_USING_LONGLONG */
+            *fmt == 'z')
+        {
+            qualifier = *fmt;
+            ++fmt;
+#ifdef RT_KPRINTF_USING_LONGLONG
+            if (qualifier == 'l' && *fmt == 'l')
+            {
+                qualifier = 'L';
+                ++fmt;
+            }
+#endif /* RT_KPRINTF_USING_LONGLONG */
+            if (qualifier == 'h' && *fmt == 'h')
+            {
+                qualifier = 'H';
+                ++fmt;
+            }
+        }
+
+        /* the default base */
+        base = 10;
+
+        switch (*fmt)
+        {
+        case 'c':
+            if (!(flags & LEFT))
+            {
+                while (--field_width > 0)
+                {
+                    if (str < end) *str = ' ';
+                    ++ str;
+                }
+            }
+
+            /* get character */
+            c = (rt_uint8_t)va_arg(args, int);
+            if (str < end)
+            {
+                *str = c;
+            }
+            ++ str;
+
+            /* put width */
+            while (--field_width > 0)
+            {
+                if (str < end) *str = ' ';
+                ++ str;
+            }
+            continue;
+
+        case 's':
+            s = va_arg(args, char *);
+            if (!s)
+            {
+                s = "(NULL)";
+            }
+
+            for (len = 0; (len != field_width) && (s[len] != '\0'); len++);
+
+            if (precision > 0 && len > precision)
+            {
+                len = precision;
+            }
+
+            if (!(flags & LEFT))
+            {
+                while (len < field_width--)
+                {
+                    if (str < end) *str = ' ';
+                    ++ str;
+                }
+            }
+
+            for (i = 0; i < len; ++i)
+            {
+                if (str < end) *str = *s;
+                ++ str;
+                ++ s;
+            }
+
+            while (len < field_width--)
+            {
+                if (str < end) *str = ' ';
+                ++ str;
+            }
+            continue;
+
+        case 'p':
+            if (field_width == -1)
+            {
+                field_width = sizeof(void *) << 1;
+                field_width += 2; /* `0x` prefix */
+                flags |= SPECIAL;
+                flags |= ZEROPAD;
+            }
+            str = print_number(str, end, (unsigned long)va_arg(args, void *),
+                               16, qualifier, field_width, precision, flags);
+            continue;
+
+        case '%':
+            if (str < end)
+            {
+                *str = '%';
+            }
+            ++ str;
+            continue;
+
+        /* integer number formats - set up the flags and "break" */
+        case 'b':
+            base = 2;
+            break;
+        case 'o':
+            base = 8;
+            break;
+
+        case 'X':
+            flags |= LARGE;
+        case 'x':
+            base = 16;
+            break;
+
+        case 'd':
+        case 'i':
+            flags |= SIGN;
+        case 'u':
+            break;
+
+        case 'e':
+        case 'E':
+        case 'G':
+        case 'g':
+        case 'f':
+        case 'F':
+            va_arg(args, double);
+        default:
+            if (str < end)
+            {
+                *str = '%';
+            }
+            ++ str;
+
+            if (*fmt)
+            {
+                if (str < end)
+                {
+                    *str = *fmt;
+                }
+                ++ str;
+            }
+            else
+            {
+                -- fmt;
+            }
+            continue;
+        }
+
+        if (qualifier == 'L')
+        {
+            num = va_arg(args, unsigned long long);
+        }
+        else if (qualifier == 'l')
+        {
+            num = va_arg(args, unsigned long);
+        }
+        else if (qualifier == 'H')
+        {
+            num = (rt_int8_t)va_arg(args, rt_int32_t);
+            if (flags & SIGN)
+            {
+                num = (rt_int8_t)num;
+            }
+        }
+        else if (qualifier == 'h')
+        {
+            num = (rt_uint16_t)va_arg(args, rt_int32_t);
+            if (flags & SIGN)
+            {
+                num = (rt_int16_t)num;
+            }
+        }
+        else if (qualifier == 'z')
+        {
+            num = va_arg(args, rt_size_t);
+            if (flags & SIGN)
+            {
+                num = (rt_ssize_t)num;
+            }
+        }
+        else
+        {
+            num = (rt_uint32_t)va_arg(args, unsigned long);
+        }
+        str = print_number(str, end, num, base, qualifier, field_width, precision, flags);
+    }
+
+    if (size > 0)
+    {
+        if (str < end)
+        {
+            *str = '\0';
+        }
+        else
+        {
+            end[-1] = '\0';
+        }
+    }
+
+    /* the trailing null byte doesn't count towards the total
+    * ++str;
+    */
+    return str - buf;
+}
+RTM_EXPORT(rt_vsnprintf);
+#if defined(__GNUC__) && !defined(__ARMCC_VERSION) /* GCC */
+#pragma GCC diagnostic pop /* ignored "-Wimplicit-fallthrough" */
+#endif /* defined(__GNUC__) && !defined(__ARMCC_VERSION) */
+
+/**
+ * @brief  This function will fill a formatted string to buffer.
+ *
+ * @param  buf is the buffer to save formatted string.
+ *
+ * @param  size is the size of buffer.
+ *
+ * @param  fmt is the format parameters.
+ *
+ * @return The number of characters actually written to buffer.
+ */
+int rt_snprintf(char *buf, rt_size_t size, const char *fmt, ...)
+{
+    rt_int32_t n = 0;
+    va_list args;
+
+    va_start(args, fmt);
+    n = rt_vsnprintf(buf, size, fmt, args);
+    va_end(args);
+
+    return n;
+}
+RTM_EXPORT(rt_snprintf);
+
+/**
+ * @brief  This function will fill a formatted string to buffer.
+ *
+ * @param  buf is the buffer to save formatted string.
+ *
+ * @param  format is the format parameters.
+ *
+ * @param  arg_ptr is a list of variable parameters.
+ *
+ * @return The number of characters actually written to buffer.
+ */
+int rt_vsprintf(char *buf, const char *format, va_list arg_ptr)
+{
+    return rt_vsnprintf(buf, (rt_size_t) - 1, format, arg_ptr);
+}
+RTM_EXPORT(rt_vsprintf);
+
+/**
+ * @brief  This function will fill a formatted string to buffer
+ *
+ * @param  buf the buffer to save formatted string.
+ *
+ * @param  format is the format parameters.
+ *
+ * @return The number of characters actually written to buffer.
+ */
+int rt_sprintf(char *buf, const char *format, ...)
+{
+    rt_int32_t n = 0;
+    va_list arg_ptr;
+
+    va_start(arg_ptr, format);
+    n = rt_vsprintf(buf, format, arg_ptr);
+    va_end(arg_ptr);
+
+    return n;
+}
+RTM_EXPORT(rt_sprintf);