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/*
* prof_file.c ---- routines that manipulate an individual profile file.
*/
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include <string.h>
#include "prof_int.h"
#ifndef NO_SYS_TYPES_H
#include <sys/types.h>
#endif
#ifndef NO_SYS_STAT_H
#include <sys/stat.h>
#endif
#include <errno.h>
#if defined(_MSDOS) || defined(_WIN32)
#define stat _stat
#endif
errcode_t profile_open_file(filename, ret_prof)
const char *filename;
prf_file_t *ret_prof;
{
prf_file_t prf;
errcode_t retval;
prf = malloc(sizeof(struct _prf_file_t));
if (!prf)
return ENOMEM;
memset(prf, 0, sizeof(struct _prf_file_t));
prf->filename = malloc(strlen(filename)+1);
if (!prf->filename) {
free(prf);
return ENOMEM;
}
strcpy(prf->filename, filename);
prf->magic = PROF_MAGIC_FILE;
retval = profile_update_file(prf);
if (retval) {
profile_close_file(prf);
return retval;
}
*ret_prof = prf;
return 0;
}
errcode_t profile_update_file(prf)
prf_file_t prf;
{
errcode_t retval;
#ifdef HAVE_STAT
struct stat st;
#endif
FILE *f;
#ifdef HAVE_STAT
if (stat(prf->filename, &st))
return errno;
if (st.st_mtime == prf->timestamp)
return 0;
if (prf->root) {
profile_free_node(prf->root);
prf->root = 0;
}
if (prf->comment) {
free(prf->comment);
prf->comment = 0;
}
#else
/*
* If we don't have the stat() call, assume that our in-core
* memory image is correct. That is, we won't reread the
* profile file if it changes.
*/
if (prf->root)
return 0;
#endif
f = fopen(prf->filename, "r");
if (f == NULL)
return errno;
prf->upd_serial++;
retval = profile_parse_file(f, &prf->root);
fclose(f);
if (retval)
return retval;
#ifdef HAVE_STAT
prf->timestamp = st.st_mtime;
#endif
return 0;
}
errcode_t profile_close_file(prf)
prf_file_t prf;
{
if (prf->filename)
free(prf->filename);
if (prf->root)
profile_free_node(prf->root);
if (prf->comment)
free(prf->comment);
prf->magic = 0;
free(prf);
return 0;
}
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