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lf.c
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C/C++ Source or Header
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1990-05-02
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4KB
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221 lines
/****************************************************************
* *
* lf.c - list functions in a c source file V1.1 *
* *
* (c) 1989 Jeff Bevis *
* *
****************************************************************
* *
* Command line options *
* *
* -s Suppress line number printing. *
* -c Format output for C function declarations *
* -n Force normal formatting *
* *
****************************************************************/
#include <stdio.h>
FILE *s;
char c,buf[400],cget();
int mode,col,linecount;
char c_flag,s_flag,nofile;
main(argc,argv)
int argc;
char **argv;
{
int t;
if(argc>1)
{
for(t=1;t<argc;t++)
{
if(*argv[t]=='-')
{
int s;
for(s=1;s<strlen(argv[t]);s++)
{
switch(*(argv[t]+s))
{
case 's': s_flag++; break;
case 'c': c_flag++; break;
case 'n': s_flag=0;
c_flag=0; break;
default: if(!c_flag) printf("Unrecognized option: %c\n",*(argv[t]+s));
}
}
continue;
}
s=fopen(argv[t],"r");
if(s)
{
if(c_flag) printf("/*\n * Functions from %s\n */\n",argv[t]);
else printf("FILE: %s\n",argv[t]);
find();
fclose(s);
}
else
{
if(c_flag) printf("/* FILE: %s NOT PRESENT! */\n",argv[t]);
else printf("Can't open file %s.\n",argv[t]);
}
}
}
else
{
if(c_flag) printf("/* No files specified for lf */\n");
else printf("You must specify a C source file.\n");
exit(10);
};
}
find()
{
int comlev=0,depth=0,cnt=0;
linecount=0;
col=0;
c=0;
while(c!=EOF)
{
c=cget(s);
if(comlev==1 && c!='*') comlev=0;
switch(c)
{
case '\n': buf[cnt]='\0';
think(cnt);
cnt=0;
break;
case '#': if(col==1) readtoeol(); /* skip over preprocessor lines */
break;
case '\\': c=cget(s);
break;
case '/': comlev=1;
break;
case '*': if(comlev==1) readto_eocomment();
break;
case '\"': readto_eoquote();
break;
case '\'': readto_eochar();
break;
case '{': depth++;
break;
case '}': depth--;
break;
}
if(depth==0 && comlev==0 && c!=EOF && c!='\n') buf[cnt++]=c;
}
}
readtoeol()
{
c=cget(s);
while(c!=EOF && c!='\n') c=cget(s);
}
readto_eocomment()
{
c=cget(s);
while(c!=EOF)
{
if(c=='*')
{
c=cget(s);
if(c=='/') return;
}
else c=cget(s);
}
}
readto_eoquote()
{
c=cget(s);
while(c!=EOF && c!='\"') c=cget(s);
}
readto_eochar()
{
c=cget(s);
while(c!=EOF && c!='\'') c=cget(s);
}
think(cnt)
{
int z;
z=cnt;
if(z>2)
{
z--;
while((buf[z]==' ' || buf[z]=='\t') && z>1) z--;
buf[z+1]='\0';
if(buf[z]==')')
{
if(c_flag)
{
int tc,r,tspot=0,vd=1,validchar=0,checknow=0;
for(r=z;r>0;r--) /* find first space before function parentheses */
{
if(buf[r]==' ' || buf[r]=='\t') /* if a whitespace */
{
if(validchar) /* and we're ready to accept one */
{
tspot=r; /* remember the tab-spot */
vd=0;
break; /* leave loop */
}
}
else if(checknow) validchar=1; /* if first non-space before parentheses, must be function name. OK to look for leading space now */
else if(buf[r]=='(') checknow=1; /* see if we left the function parentheses */
}
for(r=tspot;r<=z;r++) /* find leftmost parentheses of function decl after tspot */
{
if(buf[r]=='(')
{
buf[r+1]=')';
buf[r+2]='\0';
break;
}
}
if(vd) printf("void\t\t\t%s;\n",buf);
else
{
for(r=0;r<tspot;r++) putchar((int)buf[r]);
tc=3-(tspot>>3); /* tab size of 8, 2^3) */
for(r=0;r<tc;r++) putchar('\t');
printf("%s;\n",buf+tspot+1);
}
}
else if(s_flag) printf("%s\n",buf); /* no line num */
else printf("\t%4d: %s\n",linecount,buf); /* default mode */
return;
}
}
}
char cget(f)
FILE *f;
{
char c;
c=getc(f);
if(c=='\n')
{
linecount++;
col=0;
}
else col++;
if(c=='\\') /* if escape slash is read, */
{
c=getc(f); /* get char after escape */
return(cget(f)); /* return next non-escape char after that */
}
return(c);
}