rle_putcom.c File Reference

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

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Functions
static char *	match (char *n, char *v)
const char *	rle_putcom (char *value, rle_hdr *the_hdr) const
const char *	rle_delcom (char *name, the_hdr) const

Function Documentation

static char* match ( char *  n, char *  v  )

static

Definition at line 50 of file rle_putcom.c.

{
    for ( ; *n != '\0' && *n != '=' && *n == *v; n++, v++ )
    ;
    if (*n == '\0' || *n == '=') {
    if ( *v == '\0' )
        return v;
    else if ( *v == '=' )
        return ++v;
    }

    return NULL;
}

const char* rle_delcom	(	char *	name,
		the_hdr
	)		const

Definition at line 140 of file rle_putcom.c.

{
    register CONST_DECL char ** cp;
    CONST_DECL char * v = NULL;

    if ( the_hdr->comments == NULL )
    return NULL;
    else
    {
    for ( cp = the_hdr->comments; *cp != NULL; cp++ )
        if ( match( name, *cp ) != NULL )
        {
        v = *cp;
        for ( ; *cp != NULL; cp++ )
            *cp = cp[1];
        break;
        }
    /* Not found */
    }

    if ( *the_hdr->comments == NULL )
    the_hdr->comments = NULL;

    return v;
}

const char* rle_putcom	(	char *	value,
		rle_hdr *	the_hdr
	)		const

Definition at line 82 of file rle_putcom.c.

Referenced by find_most_used(), and write_rle_header().

{
    register CONST_DECL char ** cp, ** old_comments;
    CONST_DECL char * v;
    int i;

    if ( the_hdr->comments == NULL )
    {
    the_hdr->comments = (CONST_DECL char **)malloc( 2 * sizeof(char *) );
    the_hdr->comments[0] = value;
    the_hdr->comments[1] = NULL;
    }
    else
    {
    for ( i = 2, cp = the_hdr->comments; *cp != NULL; i++, cp++ )
        if ( match( value, *cp ) != NULL )
        {
        v = *cp;
        *cp = value;
        return v;
        }
    /* Not found */
    /* Can't realloc because somebody else might be pointing to this
     * comments block.  Of course, if this were true, then the
     * assignment above would change the comments for two headers.
     * But at least, that won't crash the program.  Realloc will.
     * This would work a lot better in C++, where hdr1 = hdr2
     * could copy the pointers, too.
     */
    old_comments = the_hdr->comments;
    the_hdr->comments = (CONST_DECL char **)malloc(i * sizeof(char *) );
    the_hdr->comments[--i] = NULL;
    the_hdr->comments[--i] = value;
    for ( i--; i >= 0; i-- )
        the_hdr->comments[i] = old_comments[i];
    }

    return NULL;
}

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