154 lines
2.7 KiB
C
154 lines
2.7 KiB
C
/* string_extras.c */
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/*
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This file is part of the ARM-Crypto-Lib.
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Copyright (C) 2008 Daniel Otte (daniel.otte@rub.de)
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/**
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* \file string_extras.c
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* \author Daniel Otte
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* \date 2006-05-16
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* \license GPLv3 or later
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*
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*/
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#include <stdint.h>
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#include <stdlib.h>
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#include <ctype.h>
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#include <string.h>
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#include "cli.h"
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uint32_t stridentcnt(const char* a, const char* b){
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uint16_t i=0;
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for(;;){
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if(*a != *b || *b=='\0')
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return i;
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i++;
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a++;
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b++;
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}
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}
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uint16_t firstword_length(const char* s){
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uint16_t ret=0;
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if(!s){
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return 0;
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}
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int c;
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while(c=*s++, isgraph(c)){
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ret++;
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}
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return ret;
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}
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char* strstrip(char* str){
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if(!str)
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return str;
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char* endptr;
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while(*str && (*str==' ' || *str=='\t'))
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++str;
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endptr=str;
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while(*endptr)
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++endptr;
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do{
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--endptr;
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}while(*endptr==' ' || *endptr=='\t');
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endptr[1]='\0';
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return str;
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}
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void str_reverse(char* buffer){
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char *i, *j;
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char c;
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i=buffer;
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j=buffer + strlen(buffer)-1;
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while(i<j){
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c = *i;
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*i = *j;
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*j = c;
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++i;
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--j;
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}
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}
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char* ultoa(unsigned long a, char* buffer, uint8_t radix){
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if(radix<2 || radix>36){
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return NULL;
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}
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char* ptr=buffer;
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div_t result;
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if(a==0){
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ptr[0] = '0';
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ptr[1] = '\0';
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return buffer;
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}
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while(a){
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result = div(a, radix);
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*ptr = result.rem;
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if(result.rem<10){
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*ptr += '0';
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}else{
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*ptr += 'a'-10;
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}
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++ptr;
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a = result.quot;
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}
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*ptr = '\0';
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str_reverse(buffer);
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return buffer;
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}
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char* ulltoa(unsigned long long a, char* buffer, uint8_t radix){
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if(radix<2 || radix>36){
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return NULL;
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}
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char* ptr=buffer;
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uint8_t rem;
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unsigned long long quot;
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if(a==0){
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ptr[0] = '0';
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ptr[1] = '\0';
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return buffer;
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}
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while(a){
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rem = a % radix;
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quot = a / radix;
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if(rem<10){
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rem += '0';
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}else{
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rem += 'a'-10;
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}
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*ptr++ =rem;
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a = quot;
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}
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*ptr = '\0';
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str_reverse(buffer);
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return buffer;
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}
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char* ustoa(unsigned short a, char* buffer, uint8_t radix){
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return ultoa((unsigned long)a, buffer, radix);
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}
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/*
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void strlwr(char* s){
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while(*s){
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*s = tolower(*s);
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s++;
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}
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}
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*/
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