brealloc -- basic

brealloc

basic

EMF

Synopsis

Reallocate a block of memory.

Prototype

 #include "uemf.h"

 void *brealloc(B_ARGS_DEC, void* mp, int newsize);

Parameters

B_ARGS_DEC	Callers source file name and line number. Really two arguments.
mp	Pointer to a previously allocated memory block using balloc.
newsize	New size in bytes.

Description

The GoAhead equivalent of realloc.

Note: Allows NULL pointers. Will just do a balloc on the size if that is the case.

Return Value

Return pointer to newly allocated block. If the realloc fails, NULL is returned and the previous buffer is preserved.

Example

/***********************************************************************/
/*
 *    Add a character to a string buffer
 */

static void put_char(strbuf_t *buf, char_t c)
{
    if (buf->count >= buf->size) {
        if (! (buf->flags & STR_REALLOC)) {
            return;
        }
        buf->size += STR_INC;
        if (buf->size > buf->max && buf->size > STR_INC) {
            a_assert(buf->size <= buf->max);
            buf->size -= STR_INC;
            return;
        }
        if (buf->s == NULL) {
            buf->s = balloc(B_L, buf->size * sizeof(char_t));
        } else {
            buf->s = brealloc(B_L, buf->s, buf->size * sizeof(char_t));
        }
    }
    buf->s[buf->count] = c;
    ++buf->count;
}

Stability Classification

Stable.