pc-bios/s390-ccw/libc.h

   1 /*
   2  * libc-style definitions and functions
   3  *
   4  * Copyright (c) 2013 Alexander Graf <agraf@suse.de>
   5  *
   6  * This code is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU General Public License as published by the
   8  * Free Software Foundation; either version 2 of the License, or (at your
   9  * option) any later version.
  10  */
  11
  12 #ifndef S390_CCW_LIBC_H
  13 #define S390_CCW_LIBC_H
  14
  15 typedef unsigned long      size_t;
  16 typedef int                bool;
  17 typedef unsigned char      uint8_t;
  18 typedef unsigned short     uint16_t;
  19 typedef unsigned int       uint32_t;
  20 typedef unsigned long long uint64_t;
  21
  22 static inline void *memset(void *s, int c, size_t n)
  23 {
  24     size_t i;
  25     unsigned char *p = s;
  26
  27     for (i = 0; i < n; i++) {
  28         p[i] = c;
  29     }
  30
  31     return s;
  32 }
  33
  34 static inline void *memcpy(void *s1, const void *s2, size_t n)
  35 {
  36     uint8_t *dest = s1;
  37     const uint8_t *src = s2;
  38     size_t i;
  39
  40     for (i = 0; i < n; i++) {
  41         dest[i] = src[i];
  42     }
  43
  44     return s1;
  45 }
  46
  47 static inline int memcmp(const void *s1, const void *s2, size_t n)
  48 {
  49     size_t i;
  50     const uint8_t *p1 = s1, *p2 = s2;
  51
  52     for (i = 0; i < n; i++) {
  53         if (p1[i] != p2[i]) {
  54             return p1[i] > p2[i] ? 1 : -1;
  55         }
  56     }
  57
  58     return 0;
  59 }
  60
  61 static inline size_t strlen(const char *str)
  62 {
  63     size_t i;
  64     for (i = 0; *str; i++) {
  65         str++;
  66     }
  67     return i;
  68 }
  69
  70 static inline char *strcat(char *dest, const char *src)
  71 {
  72     int i;
  73     char *dest_end = dest + strlen(dest);
  74
  75     for (i = 0; i <= strlen(src); i++) {
  76         dest_end[i] = src[i];
  77     }
  78     return dest;
  79 }
  80
  81 static inline int isdigit(int c)
  82 {
  83     return (c >= '0') && (c <= '9');
  84 }
  85
  86 uint64_t atoui(const char *str);
  87 char *uitoa(uint64_t num, char *str, size_t len);
  88
  89 #endif