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#include "filehash.h"
#include <err.h>
#include <stdlib.h>
#include <string.h>
struct filehash_t
{
const char *hash_program;
const char **argv;
unsigned max_per_invocation;
unsigned next;
};
filehash_t *
filehash_new(const char *hash_program, unsigned max_per_invocation)
{
filehash_t *fh;
fh = malloc(sizeof(filehash_t));
if (!fh)
return NULL;
*fh = (filehash_t){
.hash_program = strdup(hash_program),
.max_per_invocation = max_per_invocation,
.argv = reallocarray(NULL, 1 + max_per_invocation, sizeof(const char *)),
};
if (!fh->argv)
goto fail;
for (int i = 0; i <= max_per_invocation; ++i)
fh->argv[i] = NULL;
if (!fh->hash_program)
goto fail;
return fh;
fail:
filehash_free(fh);
return NULL;
}
#include <stdio.h>
static int run_hash(filehash_t *fh)
{
fputs(fh->hash_program, stderr);
for (int i = 0; i < fh->next; ++i) {
fputc(' ', stderr);
fputs(fh->argv[i], stderr);
}
fputc('\n', stderr);
return 0;
}
filehash_state_t filehash_send(filehash_t *fh, const char *file_name)
{
if (fh->next >= fh->max_per_invocation)
return fhs_rejected;
const char *copy = strdup(file_name);
if (!copy) {
warn("strdup");
return fhs_failure;
}
fh->argv[fh->next++] = copy;
if (fh->next < fh->max_per_invocation)
return fhs_accepts;
if (run_hash(fh) == -1)
return fhs_failure;
return fhs_full;
}
void
filehash_free(filehash_t *fh)
{
if (!fh)
return;
if (fh->argv) {
for (int i = 0; i <= fh->max_per_invocation; ++i)
free((void *)fh->argv[i]);
free(fh->argv);
}
free((void *)fh->hash_program);
free(fh);
}
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