Add library and makefile sample code

guowenxue

2020-04-13 808fdc2c3745074a941fc73c9e6233d8e41cfdc0

Add library and makefile sample code

 ch7_library/lib/crypto.h

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 ch7_library/makefile

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 ch7_library/src/crypto.c

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 ch7_library/src/crypto.h

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 ch7_library/src/makefile

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 ch7_library/test/main.c

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 ch7_library/test/makefile

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 lib_makefile/encrypto/encrypto.c

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@@ -0,0 +1,66 @@
/*********************************************************************************
 *      Copyright:  (C) 2020 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  encrypto.c
 *    Description:  This file 
 *                 
 *        Version:  1.0.0(2020年04月04日)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "2020年04月04日 21时02分36秒"
 *                 
 ********************************************************************************/

#include <stdio.h>
#include <string.h>

#include "encrypto.h"

int       g_var = 0;

static int test(void)
{
    return 0;
}

int encrypto(char *str, char *ciphertxt, int size) 
{
    int i;

    test();

    if(!str || !ciphertxt || size<strlen(str))
    {
        printf("%s:%d %s(): Invalid input arguments\n", __FILE__, __LINE__, __FUNCTION__);
        return -1;
    }

    for(i=0; i<strlen(str); i++)
    {
        ciphertxt[i]=str[i]+1;
    }


    g_var ++;

    return 0;
}


int decrypto(char *ciphertxt, char *text, int size)
{
    int i;

    if( !ciphertxt || !text || size<strlen(ciphertxt) )
    {
        printf("%s:%d %s(): Invalid input arguments\n", __FILE__, __LINE__, __FUNCTION__);
        return -1;
    }

    for(i=0; i<strlen(ciphertxt); i++)
    {
        text[i]=ciphertxt[i]-1;
    }

    return 0;
}

 lib_makefile/encrypto/encrypto.h

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@@ -0,0 +1,23 @@
/********************************************************************************
 *      Copyright:  (C) 2020 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  encrypto.h
 *    Description:  This head file 
 *
 *        Version:  1.0.0(2020年04月04日)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "2020年04月04日 21时13分05秒"
 *                 
 ********************************************************************************/
#ifndef  _ENCRYPTO_H_
#define  _ENCRYPTO_H_

extern int       g_var ;

int encrypto(char *str, char *ciphertxt, int size);
       
int decrypto(char *ciphertxt, char *text, int size);


#endif   /* ----- #ifndef _ENCRYPTO_H_  ----- */

 lib_makefile/encrypto/makefile

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@@ -0,0 +1,22 @@
LIBNAME=libencrypto

CC=${CROSSTOOL}gcc
LD=${CROSSTOOL}ld
AS=${CROSSTOOL}as
AR=${CROSSTOOL}ar

all: liba
    @rm -f *.o

libso:
    ${CC} -fPIC -shared *.c -o ${LIBNAME}.so

liba:
    ${CC} -c *.c
    ${AR} -rcs ${LIBNAME}.a *.o

clean:
    rm -f ${LIBNAME}.*

distclean: clean
    rm -f *.o

 lib_makefile/main.c

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@@ -0,0 +1,32 @@
/*********************************************************************************
 *      Copyright:  (C) 2020 LingYun IoT System Studio
 *                  All rights reserved.
 *
 *       Filename:  main.c
 *    Description:  This file 
 *                 
 *        Version:  1.0.0(2020年04月04日)
 *         Author:  Guo Wenxue <guowenxue@gmail.com>
 *      ChangeLog:  1, Release initial version on "2020年04月04日 20时57分10秒"
 *                 
 ********************************************************************************/

#include <stdio.h>
#include "encrypto.h"

int main (int argc, char *argv[])
{
    char    *str="hello world"; 
    char     ciphertxt[128];
    char     text[128];

    encrypto(str, ciphertxt, 128);
    printf("cipher text: %s\r\n", ciphertxt);

    decrypto(ciphertxt, text, 128);
    printf("text: %s\r\n", text);


    return 0;
} 


 lib_makefile/makefile

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@@ -0,0 +1,34 @@

APP_NAME=test

CROSSTOOL?=/opt/rpi/arm-bcm2708/arm-linux-gnueabihf/bin/arm-linux-
CC=${CROSSTOOL}gcc
LD=${CROSSTOOL}ld
AS=${CROSSTOOL}as
AR=${CROSSTOOL}ar

# Compile flags
CFLAGS=-Wall -Werror
CFLAGS+=-Iencrypto

# Linker flags
LDFLAGS=-Lencrypto -lencrypto


all: banner libencrypto
    ${CC} ${CFLAGS} main.c -o ${APP_NAME} ${LDFLAGS}

banner:
    @echo "Start to compile ${SRC} by ${CC}"

libencrypto:
    @make CROSSTOOL=${CROSSTOOL} -C encrypto

clean: 
    @make clean -C encrypto
    rm -f ${APP_NAME}

distclean: clean
    @make distclean -C encrypto
    rm -f *.o