add more helper functions to deal with C string (strstr, strtol, strtoul, ...)
This commit is contained in:
Stefan Lankes
parent
187140ae99
commit
719b54b05a
8 changed files with 484 additions and 8 deletions
129
include/eduos/ctype.h
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129
include/eduos/ctype.h
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@ -0,0 +1,129 @@
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/****************************************************************************************
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*
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* Author: Stefan Lankes
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* Chair for Operating Systems, RWTH Aachen University
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* Date: 24/03/2011
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*
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****************************************************************************************
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*
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* Written by the Chair for Operating Systems, RWTH Aachen University
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*
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* NO Copyright (C) 2010, Stefan Lankes,
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* consider these trivial functions to be public domain.
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*
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* These functions are distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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*/
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/**
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* @author Stefan Lankes
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* @file include/eduos/ctype.h
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* @brief Functions related to alphanumerical character values
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*
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* This file contains functions helping to determine
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* the type of alphanumerical character values.
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*/
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#ifndef __CTYPE_H_
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#define __CYTPE_H_
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/** Returns true if the value of 'c' is an ASCII-charater */
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static inline int isascii(int c)
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{
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return (((unsigned char)(c))<=0x7f);
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}
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/** Applies an and-operation to
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* push the value of 'c' into the ASCII-range */
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static inline int toascii(int c)
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{
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return (((unsigned char)(c))&0x7f);
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}
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/** Returns true if the value of 'c' is the
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* space character or a control character */
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static inline int isspace(int c)
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{
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if (!isascii(c))
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return 0;
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if (' ' == (unsigned char) c)
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return 1;
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if ('\n' == (unsigned char) c)
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return 1;
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if ('\r' == (unsigned char) c)
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return 1;
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if ('\t' == (unsigned char) c)
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return 1;
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if ('\v' == (unsigned char) c)
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return 1;
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if ('\f' == (unsigned char) c)
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return 1;
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return 0;
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}
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/** Returns true if the value of 'c' is a number */
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static inline int isdigit(int c)
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{
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if (!isascii(c))
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return 0;
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if (((unsigned char) c >= '0') && ((unsigned char) c <= '9'))
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return 1;
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return 0;
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}
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/** Returns true if the value of 'c' is a lower case letter */
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static inline int islower(int c)
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{
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if (!isascii(c))
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return 0;
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if (((unsigned char) c >= 'a') && ((unsigned char) c <= 'z'))
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return 1;
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return 0;
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}
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/** Returns true if the value of 'c' is an upper case letter */
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static inline int isupper(int c)
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{
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if (!isascii(c))
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return 0;
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if (((unsigned char) c >= 'A') && ((unsigned char) c <= 'Z'))
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return 1;
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return 0;
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}
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/** Returns true if the value of 'c' is an alphabetic character */
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static inline int isalpha(int c)
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{
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if (isupper(c) || islower(c))
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return 1;
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return 0;
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}
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/** Makes the input character lower case.\n Will do nothing if it
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* was something different than an upper case letter before. */
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static inline unsigned char tolower(unsigned char c)
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{
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if (isupper(c))
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c -= 'A'-'a';
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return c;
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}
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/** Makes the input character upper case.\n Will do nothing if it
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* was something different than a lower case letter before. */
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static inline unsigned char toupper(unsigned char c)
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{
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if (islower(c))
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c -= 'a'-'A';
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return c;
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}
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#endif
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@ -38,7 +38,7 @@
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#define __STDLIB_H__
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#include <eduos/config.h>
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#include <asm/stddef.h>
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#include <eduos/stddef.h>
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#ifdef __cplusplus
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extern "C" {
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@ -50,6 +50,29 @@ extern "C" {
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*/
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void* create_stack(tid_t id);
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/** @brief String to long
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*
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* @return Long value of the parsed numerical string
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*/
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long strtol(const char* str, char** endptr, int base);
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/** @brief String to unsigned long
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*
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* @return Unsigned long value of the parsed numerical string
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*/
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unsigned long strtoul(const char* nptr, char** endptr, int base);
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/** @brief ASCII to integer
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*
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* Convenience function using strtol().
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*
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* @return Integer value of the parsed numerical string
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*/
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static inline int atoi(const char *str)
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{
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return (int)strtol(str, (char **)NULL, 10);
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}
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#ifdef __cplusplus
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}
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#endif
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@ -54,11 +54,11 @@ size_t strlen(const char *str);
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#endif
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#ifndef HAVE_ARCH_STRNCPY
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char* strncpy(char *dest, const char *src, size_t n);
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char *strncpy(char *dest, const char *src, size_t n);
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#endif
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#ifndef HAVE_ARCH_STRCPY
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char* strcpy(char *dest, const char *src);
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char *strcpy(char *dest, const char *src);
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#endif
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#ifndef HAVE_ARCH_STRCMP
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@ -69,6 +69,8 @@ int strcmp(const char *s1, const char *s2);
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int strncmp(const char *s1, const char *s2, size_t n);
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#endif
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char *strstr(const char *s, const char *find);
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#ifdef __cplusplus
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}
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#endif
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@ -1,4 +1,4 @@
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C_source := string.c stdio.c printf.c sprintf.c moddi3.c umoddi3.c divdi3.c udivdi3.c qdivrem.c
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C_source := string.c stdio.c printf.c sprintf.c strtol.c strtoul.c strstr.c moddi3.c umoddi3.c divdi3.c udivdi3.c qdivrem.c
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MODULE := libkern
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include $(TOPDIR)/Makefile.inc
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@ -31,6 +31,7 @@
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#include <eduos/spinlock.h>
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#include <asm/atomic.h>
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#include <asm/processor.h>
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#include <asm/multiboot.h>
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#ifdef CONFIG_VGA
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#include <asm/vga.h>
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#endif
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@ -56,6 +57,11 @@ int koutput_init(void)
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#ifdef CONFIG_VGA
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vga_init();
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#endif
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#ifdef CONFIG_UART
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if (mb_info && (mb_info->flags & MULTIBOOT_INFO_CMDLINE))
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if (!uart_early_init((char*) mb_info->cmdline))
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early_print |= UART_EARLY_PRINT;
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#endif
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return 0;
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}
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@ -114,12 +120,14 @@ int kputs(const char *str)
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int koutput_add_uart(void)
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{
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#ifdef CONFIG_UART
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uint32_t i;
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if (!(early_print & UART_EARLY_PRINT)) {
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uint32_t i;
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early_print |= UART_EARLY_PRINT;
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early_print |= UART_EARLY_PRINT;
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for(i=0; i<atomic_int32_read(&kmsg_counter); i++)
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uart_putchar(kmessages[i % KMSG_SIZE]);
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for(i=0; i<atomic_int32_read(&kmsg_counter); i++)
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uart_putchar(kmessages[i % KMSG_SIZE]);
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}
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return 0;
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#else
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69
libkern/strstr.c
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69
libkern/strstr.c
Normal file
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@ -0,0 +1,69 @@
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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/*
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* The code has been taken from FreeBSD (sys/libkern/strstr.c) and is therefore
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* BSD-licensed. Unnecessary functions have been removed and all typedefs required
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* have been added.
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*/
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/* eduOS prelude */
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#include <eduos/stdlib.h>
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#include <eduos/string.h>
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#include <eduos/ctype.h>
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#include <asm/limits.h>
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/*
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* Find the first occurrence of find in s.
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*/
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char *
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strstr(const char *s, const char *find)
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{
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char c, sc;
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size_t len;
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if ((c = *find++) != 0) {
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len = strlen(find);
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do {
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do {
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if ((sc = *s++) == 0)
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return (NULL);
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} while (sc != c);
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} while (strncmp(s, find, len) != 0);
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s--;
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}
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return ((char *) s);
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}
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133
libkern/strtol.c
Normal file
133
libkern/strtol.c
Normal file
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@ -0,0 +1,133 @@
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/*-
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* Copyright (c) 1990, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
|
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
|
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* notice, this list of conditions and the following disclaimer in the
|
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* documentation and/or other materials provided with the distribution.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* From: @(#)strtol.c 8.1 (Berkeley) 6/4/93
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*/
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/*
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* The code has been taken from FreeBSD (sys/libkern/strtol.c) and is therefore
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* BSD-licensed. Unnecessary functions have been removed and all typedefs required
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* have been added.
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*/
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/* eduOS prelude */
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#include <eduos/stddef.h>
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#include <eduos/ctype.h>
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#include <asm/limits.h>
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/*
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* Convert a string to a long integer.
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*
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* Ignores `locale' stuff. Assumes that the upper and lower case
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* alphabets and digits are each contiguous.
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*/
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long
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strtol(nptr, endptr, base)
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const char *nptr;
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char **endptr;
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int base;
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{
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const char *s = nptr;
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unsigned long acc;
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unsigned char c;
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unsigned long cutoff;
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int neg = 0, any, cutlim;
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/*
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* Skip white space and pick up leading +/- sign if any.
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* If base is 0, allow 0x for hex and 0 for octal, else
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* assume decimal; if base is already 16, allow 0x.
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*/
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do {
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c = *s++;
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} while (isspace(c));
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if (c == '-') {
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neg = 1;
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c = *s++;
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} else if (c == '+')
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c = *s++;
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if ((base == 0 || base == 16) &&
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c == '0' && (*s == 'x' || *s == 'X')) {
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c = s[1];
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s += 2;
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base = 16;
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}
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if (base == 0)
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base = c == '0' ? 8 : 10;
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/*
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* Compute the cutoff value between legal numbers and illegal
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* numbers. That is the largest legal value, divided by the
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* base. An input number that is greater than this value, if
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* followed by a legal input character, is too big. One that
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* is equal to this value may be valid or not; the limit
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* between valid and invalid numbers is then based on the last
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* digit. For instance, if the range for longs is
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* [-2147483648..2147483647] and the input base is 10,
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* cutoff will be set to 214748364 and cutlim to either
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* 7 (neg==0) or 8 (neg==1), meaning that if we have accumulated
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* a value > 214748364, or equal but the next digit is > 7 (or 8),
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* the number is too big, and we will return a range error.
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*
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* Set any if any `digits' consumed; make it negative to indicate
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* overflow.
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*/
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cutoff = neg ? -(unsigned long)LONG_MIN : LONG_MAX;
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cutlim = cutoff % (unsigned long)base;
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cutoff /= (unsigned long)base;
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for (acc = 0, any = 0;; c = *s++) {
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if (!isascii(c))
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break;
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if (isdigit(c))
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c -= '0';
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else if (isalpha(c))
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c -= isupper(c) ? 'A' - 10 : 'a' - 10;
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else
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break;
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if (c >= base)
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break;
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if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
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any = -1;
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else {
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any = 1;
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acc *= base;
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acc += c;
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}
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}
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if (any < 0) {
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acc = neg ? LONG_MIN : LONG_MAX;
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} else if (neg)
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acc = -acc;
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if (endptr != 0)
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*((const char **)endptr) = any ? s - 1 : nptr;
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return (acc);
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}
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112
libkern/strtoul.c
Normal file
112
libkern/strtoul.c
Normal file
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@ -0,0 +1,112 @@
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/*-
|
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* Copyright (c) 1990, 1993
|
||||
* The Regents of the University of California. All rights reserved.
|
||||
*
|
||||
* This code is derived from software contributed to Berkeley by
|
||||
* Chris Torek.
|
||||
*
|
||||
* Redistribution and use in source and binary forms, with or without
|
||||
* modification, are permitted provided that the following conditions
|
||||
* are met:
|
||||
* 1. Redistributions of source code must retain the above copyright
|
||||
* notice, this list of conditions and the following disclaimer.
|
||||
* 2. Redistributions in binary form must reproduce the above copyright
|
||||
* notice, this list of conditions and the following disclaimer in the
|
||||
* documentation and/or other materials provided with the distribution.
|
||||
* 4. Neither the name of the University nor the names of its contributors
|
||||
* may be used to endorse or promote products derived from this software
|
||||
* without specific prior written permission.
|
||||
*
|
||||
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
||||
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
||||
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
||||
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
||||
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
||||
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
||||
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
||||
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
||||
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
||||
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
||||
* SUCH DAMAGE.
|
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*
|
||||
* From: @(#)strtoul.c 8.1 (Berkeley) 6/4/93
|
||||
*/
|
||||
|
||||
/*
|
||||
* The code has been taken from FreeBSD (sys/libkern/strtoul.c) and is therefore
|
||||
* BSD-licensed. Unnecessary functions have been removed and all typedefs required
|
||||
* have been added.
|
||||
*/
|
||||
|
||||
/* eduOS prelude */
|
||||
#include <eduos/stddef.h>
|
||||
#include <eduos/ctype.h>
|
||||
#include <asm/limits.h>
|
||||
|
||||
/*
|
||||
* Convert a string to an unsigned long integer.
|
||||
*
|
||||
* Ignores `locale' stuff. Assumes that the upper and lower case
|
||||
* alphabets and digits are each contiguous.
|
||||
*/
|
||||
unsigned long
|
||||
strtoul(nptr, endptr, base)
|
||||
const char *nptr;
|
||||
char **endptr;
|
||||
int base;
|
||||
{
|
||||
const char *s = nptr;
|
||||
unsigned long acc;
|
||||
unsigned char c;
|
||||
unsigned long cutoff;
|
||||
int neg = 0, any, cutlim;
|
||||
|
||||
/*
|
||||
* See strtol for comments as to the logic used.
|
||||
*/
|
||||
do {
|
||||
c = *s++;
|
||||
} while (isspace(c));
|
||||
if (c == '-') {
|
||||
neg = 1;
|
||||
c = *s++;
|
||||
} else if (c == '+')
|
||||
c = *s++;
|
||||
if ((base == 0 || base == 16) &&
|
||||
c == '0' && (*s == 'x' || *s == 'X')) {
|
||||
c = s[1];
|
||||
s += 2;
|
||||
base = 16;
|
||||
}
|
||||
if (base == 0)
|
||||
base = c == '0' ? 8 : 10;
|
||||
cutoff = (unsigned long)ULONG_MAX / (unsigned long)base;
|
||||
cutlim = (unsigned long)ULONG_MAX % (unsigned long)base;
|
||||
for (acc = 0, any = 0;; c = *s++) {
|
||||
if (!isascii(c))
|
||||
break;
|
||||
if (isdigit(c))
|
||||
c -= '0';
|
||||
else if (isalpha(c))
|
||||
c -= isupper(c) ? 'A' - 10 : 'a' - 10;
|
||||
else
|
||||
break;
|
||||
if (c >= base)
|
||||
break;
|
||||
if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
|
||||
any = -1;
|
||||
else {
|
||||
any = 1;
|
||||
acc *= base;
|
||||
acc += c;
|
||||
}
|
||||
}
|
||||
if (any < 0) {
|
||||
acc = ULONG_MAX;
|
||||
} else if (neg)
|
||||
acc = -acc;
|
||||
if (endptr != 0)
|
||||
*((const char **)endptr) = any ? s - 1 : nptr;
|
||||
return (acc);
|
||||
}
|
||||
|
||||
Loading…
Add table
Reference in a new issue