用 Python 批量转换 C 源码遇到问题

有 40 多个 C 源码文件，每一个里面都有 main 函数，都是从 stdin 或者文件读取参数，结果直接 print 到 stdout 或者 stderr 。 我想把它全部改写成普通函数，直接传参数调用函数，然后返回状态码(编译成动态链接库然后从 Python 里面调用)。 我尝试用正则替换实现，但是只能做到把 errorprint 函数提取出来，读取参数和输出不知道怎么处理。 求 V 友们指点，非常感谢！

样本 1 ：

#include <stdio.h>
#include <math.h>
#include <stdlib.h>

#define Pi 3.141592654


double aa[4096];
void error_print();

void main(int argc, char *argv[]){
    double *x, dum;
    int i ,  nn,  j, im, jm ;
    long ik;
    FILE *fr ;

    if (argc< 2 || argc >2 ){
        error_print(argv[0]);
        exit(1);
    }



    fr=fopen(argv[1],"r");
    x = (double *) calloc( 1, sizeof(double) );

    ik=0;
    while ((fscanf(fr,"%le", &dum))!= EOF){
        x = (double *) realloc ( x, sizeof(double)*(ik+1));

        if(x == NULL ){
            fprintf(stderr,"%s: Allocation error while reading, exiting\n", argv[0]);
            exit(1);
        }
        x[ik]=dum;	 
	/* fprintf(stderr," %e \n", x[ik]); */
        ik++;
    }
    nn=(int) sqrt( (double) ik);
   fclose(fr); 


    
    for(i=1; i<=nn; i++){
      im = nn+1-i;
      
        for (j=1; j<=nn; j++){
	  double fdd=0;
	  jm=nn+1-j;
	
	  ik=(i-1)*nn+j-1;
	  fdd += x[ik];
	  ik=(j-1)*nn+i-1;
	  fdd += x[ik];	  
	  ik=(j-1)*nn+im-1; 
	  fdd += x[ik];
	  ik=(i-1)*nn+jm-1; 
	  fdd += x[ik];

/*	  ik=(j-1)*nn+i-1;
	  fdd += x[ik];
	  ik=(j-1)*nn+im-1;  
	  fdd += x[ik];	  */
	    printf("%g\n", fdd);
	    }
      printf("\n");
}


    free(x);

    fclose(fr);
}

void error_print(char *arr) { 

    fprintf(stderr,"\n%s  converts the intensity file into sum of itself three times rotated 90 degrees\n", arr);

    fprintf(stderr,"\nUSAGE: %s F > M_F  where F is the file in gnuplot format, M_F is the output file in the gnuplot format\n\n", arr);

}

样本 2

 
#include "pipes.h"
#include <math.h>
#include <string.h>

void main(int argc, char *argv[]){
    void error_print();

    int i,j, n2;
    double sum, sum1r, sum1i, sum1, sum2, dx,dx2, s_p, x,y, x_c, y_c;
    double sum1x, sum1y;
    long ik1;



    /* Processing the command line argument  */

    if (argc!= 2){
        error_print(argv[0]);
        exit(1);
    }


    read_field();

    dx =field.size/(field.number);
    dx2 = dx*dx;
    n2=field.number/2+1;



    /* Calculating the power */
    sum=sum1r=sum1i=sum2=0.;
    ik1=0;
    for (i=1;i<=field.number ;i++){
        for (j=1;j<=field.number ;j++){



            
	      s_p=(field.real[ik1]*field.real[ik1]+ \
field.imaginary[ik1]*field.imaginary[ik1]);
	    sum2 += s_p;
	    sum += sqrt(s_p);
            sum1r += field.real[ik1];
            sum1i += field.imaginary[ik1];
            ik1++;
        }
    }
    sum1=(sum1r*sum1r+sum1i*sum1i);


    if (sum == 0) {

fprintf(stderr,"Strehl: Zero beam power, program terminated\n");
        exit(1);
			      }

if(strstr(argv[1], "y")!= NULL)fprintf(stderr,"Strehl: ratio= %e energy= %e\n",sum1/sum/sum, sum2*dx2);

/* Calculating the center of gravity: */
 sum=sum1r=sum1i=sum2=0.;
 ik1=0;
    for (i=1;i<=field.number ;i++){
      y=(i-n2)*dx;
        for (j=1;j<=field.number ;j++){
	  x=(j-n2)*dx;
	  sum2=(field.real[ik1]*field.real[ik1]\
+field.imaginary[ik1]*field.imaginary[ik1]);
	  sum1r += sum2*x;
	  sum1i += sum2*y;
	  sum += sum2;

            ik1++;
        }
    }

    x_c=sum1r/sum;
    y_c=sum1i/sum;

   fprintf(stderr,"Center_of_gravity: x= %e y= %e\n", x_c, y_c);
  

/* Calculating moments of the distribution */
 sum1r=sum1x=sum1y=0.;
 ik1=0;
    for (i=1;i<=field.number ;i++){
      double y_y_c;
      y=(i-n2)*dx;
      y_y_c=y-y_c;
      
        for (j=1;j<=field.number ;j++){
	  double temp_int, x_x_c;
	  x=(j-n2)*dx;
	  x_x_c=x-x_c;
	  temp_int = (field.real[ik1]*field.real[ik1]\
+field.imaginary[ik1]*field.imaginary[ik1]);
	  sum1r += temp_int*(x_x_c*x_x_c+y_y_c*y_y_c);
	  sum1x += temp_int*(x_x_c*x_x_c);
	  sum1y += temp_int*(y_y_c*y_y_c);

            ik1++;
        }
    }


   fprintf(stderr,"Standard deviation:  S_r=%e S_x= %e S_y= %e\n", sqrt(sum1r/sum), sqrt(sum1x/sum), sqrt(sum1y/sum));
 fprintf(stderr,"Grid size: %e, Grid sampling: %d\n", field.size, field.number); 


    write_field();


}


void error_print(char *arr) { 

    fprintf(stderr,"\n%s: prints the general info to the stderr\n",arr);


    fprintf(stderr,"\n%s y, y prevents arrival of this message\n\n",arr);




}