Diff: util/ntlibc.c

Revision:

0:e91b984e285d

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/util/ntlibc.c	Sun Feb 05 03:55:01 2017 +0000
@@ -0,0 +1,283 @@
+/**
+ * @file      ntlibc.c
+ * @author    Shinichiro Nakamura (CuBeatSystems)
+ * ===============================================================
+ * MicroShell (Version 0.0.1)
+ * Copyright (c) 2016, 2017 Shinichiro Nakamura (CuBeatSystems)
+ * ===============================================================
+ * The MIT License : https://opensource.org/licenses/MIT
+ *
+ * Copyright (c) 2016, 2017 Shinichiro Nakamura (CuBeatSystems)
+ *
+ * Permission is hereby granted, free of charge, to any person
+ * obtaining a copy of this software and associated documentation
+ * files (the "Software"), to deal in the Software without
+ * restriction, including without limitation the rights to use,
+ * copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following
+ * conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
+ * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+ * OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#include "ntlibc.h"
+
+int ntlibc_strlen(const char *s)
+{
+    const char *p = s;
+    int cnt = 0;
+    while (*p) {
+        cnt++;
+        p++;
+    }
+    return cnt;
+}
+
+char *ntlibc_strcpy(char *des, const char *src)
+{
+    char *d = des;
+    const char *s = src;
+    while (*s) {
+        *d = *s;
+        d++;
+        s++;
+    }
+    *d = '\0';
+    return des;
+}
+
+char *ntlibc_strcat(char *des, const char *src)
+{
+    char *d = des;
+    const char *s = src;
+    while (*d) {
+        d++;
+    }
+    while (*s) {
+        *d = *s;
+        d++;
+        s++;
+    }
+    *d = '\0';
+    return des;
+}
+
+int ntlibc_strcmp(const char *s1, const char *s2)
+{
+    char *p1 = (char *)s1;
+    char *p2 = (char *)s2;
+    while (*p1 || *p2) {
+        if (*p1 != *p2) {
+            return (*p1 < *p2) ? -1 : 1;
+        }
+        p1++;
+        p2++;
+    }
+    if (*p1 == *p2) {
+        return 0;
+    } else {
+        return (*p1 < *p2) ? -1 : 1;
+    }
+}
+
+int ntlibc_stricmp(const char *s1, const char *s2)
+{
+    char *p1 = (char *)s1;
+    char *p2 = (char *)s2;
+    while (*p1 || *p2) {
+        if (ntlibc_toupper(*p1) != ntlibc_toupper(*p2)) {
+            return (*p1 < *p2) ? -1 : 1;
+        }
+        p1++;
+        p2++;
+    }
+    if (*p1 == *p2) {
+        return 0;
+    } else {
+        return (*p1 < *p2) ? -1 : 1;
+    }
+}
+
+int ntlibc_strncmp(const char *s1, const char *s2, int n)
+{
+    char *p1 = (char *)s1;
+    char *p2 = (char *)s2;
+    int len = 0;
+    while (*p1 || *p2) {
+        if (n <= len) {
+            break;
+        }
+        if (*p1 != *p2) {
+            return (*p1 < *p2) ? -1 : 1;
+        }
+        p1++;
+        p2++;
+        len++;
+    }
+    return 0;
+}
+
+int ntlibc_isdigit(int c)
+{
+  if (('0' <= c) && (c <= '9')) {
+    return 1;
+  }
+  return 0;
+}
+
+int ntlibc_isalpha(int c)
+{
+  if (('A' <= c) && (c <= 'Z')) {
+    return 1;
+  }
+  if (('a' <= c) && (c <= 'z')) {
+    return 1;
+  }
+  return 0;
+}
+
+int ntlibc_iscntrl(int c)
+{
+  if (c == 0x07) { return 0; }
+  if (c == 0x08) { return 0; }
+  if (c == 0x09) { return 0; }
+  if (c == 0x0a) { return 0; }
+  if (c == 0x0b) { return 0; }
+  if (c == 0x0c) { return 0; }
+  if (c == 0x0d) { return 0; }
+  if ((0x00 <= c) && (c <= 0x1f)) {
+    return 1;
+  }
+  return 0;
+}
+
+int ntlibc_toupper(int c)
+{
+  if (('a' <= c) && (c <= 'z')) {
+    int diff = 'a' - 'A';
+    return c - diff;
+  }
+  return c;
+}
+
+int ntlibc_tolower(int c)
+{
+  if (('A' <= c) && (c <= 'Z')) {
+    int diff = 'a' - 'A';
+    return c + diff;
+  }
+  return c;
+}
+
+int ntlibc_atoi(const char *nptr)
+{
+  int cnt;
+  int num = 0;
+  int ofs = 0;
+  int sign = 0;
+  int scnt = 0;
+  char *p = (char *)nptr;
+  while (*p != '\0') {
+    if (!ntlibc_isdigit(*p)) {
+      if (*p == ' ') {
+        ofs++;
+      }
+      if (*p == '+') {
+        sign = 0;
+        ofs++;
+        if (scnt++ > 0) {
+          return 0;
+        }
+      }
+      if (*p == '-') {
+        sign = 1;
+        ofs++;
+        if (scnt++ > 0) {
+          return 0;
+        }
+      }
+    }
+    p++;
+  }
+  for (cnt = ofs; (nptr[cnt] >= '0') && (nptr[cnt] <= '9'); cnt++) {
+    num = 10 * num + (nptr[cnt] - '0');
+  }
+  if (sign) {
+    return -num;
+  } else {
+    return num;
+  }
+}
+
+char *ntlibc_strchr(const char *s, int c)
+{
+  char *p = (char *)s;
+  while (*p) {
+    if (*p == c) {
+      return p;
+    }
+    p++;
+  }
+  return 0;
+}
+
+char *ntlibc_utoa(unsigned int value, char *s, int radix)
+{
+  char *s1 = s;
+  char *s2 = s;
+
+  do {
+    *s2++ = "0123456789abcdefghijklmnopqrstuvwxyz"[value % radix];
+    value /= radix;
+  } while (value > 0);
+
+  *s2-- = '\0';
+
+  while (s1 < s2) {
+    char c = *s1;
+    *s1++ = *s2;
+    *s2-- = c;
+  }
+
+  return s;
+}
+
+char *ntlibc_itoa(int value, char *s, int radix)
+{
+    char *ptr = s, *ptr1 = s, tmp_char;
+    int tmp_value;
+
+    if ((radix < 2) || (radix > 36)) {
+        *s = '\0';
+        return s;
+    }
+    do {
+        tmp_value = value;
+        value /= radix;
+        *ptr++ = "zyxwvutsrqponmlkjihgfedcba9876543210123456789abcdefghijklmnopqrstuvwxyz" [35 + (tmp_value - value * radix)];
+    } while (value);
+
+    if (tmp_value < 0) {
+        *ptr++ = '-';
+    }
+    *ptr-- = '\0';
+    while (ptr1 < ptr) {
+        tmp_char = *ptr;
+        *ptr--= *ptr1;
+        *ptr1++ = tmp_char;
+    }
+    return s;
+}
+
+