What is user gcc's purpose in requesting code possibly like this?
- by James Morris
In the question between syntax, are there any equal function the user gcc is requesting only what I can imagine to be the following code:
#include <stdio.h>
#include <string.h>
/* estimated magic values */
#define MAXFUNCS 8
#define MAXFUNCLEN 3
int the_mainp_compare_func(char** mainp)
{
char mainp0[MAXFUNCS][MAXFUNCLEN] = { 0 };
char mainp1[MAXFUNCS][MAXFUNCLEN] = { 0 };
char* psrc, *pdst;
int i = 0;
int func = 0;
psrc = mainp[0];
printf("scanning mainp[0] for functions...\n");
while(*psrc)
{
if (*psrc == '\0')
break;
else if (*psrc == ',')
++psrc;
else
{
mainp0[func][0] = *psrc++;
if (*psrc == ',')
{
mainp0[func][1] = '\0';
psrc++;
}
else if (*psrc !='\0')
{
mainp0[func][1] = *psrc++;
mainp0[func][2] = '\0';
}
printf("function: '%s'\n", mainp0[func]);
}
++func;
}
printf("\nscanning mainp[1] for functions...\n");
psrc = mainp[1];
func = 0;
while(*psrc)
{
if (*psrc == '\0')
break;
else if (*psrc == ',')
++psrc;
else
{
mainp1[func][0] = *psrc++;
if (*psrc == ',')
{
mainp1[func][1] = '\0';
psrc++;
}
else if (*psrc !='\0')
{
mainp1[func][1] = *psrc++;
mainp1[func][2] = '\0';
}
printf("function: '%s'\n", mainp1[func]);
}
++func;
}
printf("\ncomparing functions in '%s' with those in '%s'\n",
mainp[0], mainp[1] );
int func2;
func = 0;
while (*mainp0[func] != '\0')
{
func2 = 0;
while(*mainp1[func2] != '\0')
{
printf("comparing %s with %s\n", mainp0[func], mainp1[func2]);
if (strcmp(mainp0[func], mainp1[func2++]) == 0)
return 1; /* not sure what to return here */
}
++func;
}
/* no matches == failure */
return -1; /* not sure what to return on failure */
}
int main(int argc, char** argv)
{
char* mainp[] = { "P,-Q,Q,-R", "R,A,P,B,F" };
if (the_mainp_compare_func(mainp) == 1)
printf("a match was found, but I don't know what to do with it!\n");
else
printf("no match found, and I'm none the wiser!\n");
return 0;
}
My question is, what is it's purpose?
