nasm/rdoff/rdlib.c
H. Peter Anvin 12c0702824 rdoff/rdlib.c: Remove unused function rdl_close()
The function rdl_close() is never used, remove it.

Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
2015-01-05 15:21:43 -08:00

293 lines
8.0 KiB
C

/* ----------------------------------------------------------------------- *
*
* Copyright 1996-2014 The NASM Authors - All Rights Reserved
* See the file AUTHORS included with the NASM distribution for
* the specific copyright holders.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following
* conditions are met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above
* copyright notice, this list of conditions and the following
* disclaimer in the documentation and/or other materials provided
* with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
* EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
* ----------------------------------------------------------------------- */
/*
* rdlib.c - routines for manipulating RDOFF libraries (.rdl)
*/
#include "compiler.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define RDOFF_UTILS
#include "rdoff.h"
#include "rdlib.h"
#include "rdlar.h"
/* See Texinfo documentation about new RDOFF libraries format */
int rdl_error = 0;
char *rdl_errors[5] = {
"no error", "could not open file", "invalid file structure",
"file contains modules of an unsupported RDOFF version",
"module not found"
};
int rdl_verify(const char *filename)
{
FILE *fp;
char buf[257];
int i;
int32_t length;
static char lastverified[256];
static int lastresult = -1;
if (lastresult != -1 && !strcmp(filename, lastverified))
return lastresult;
fp = fopen(filename, "rb");
strcpy(lastverified, filename);
if (!fp)
return (rdl_error = lastresult = 1);
while (!feof(fp)) {
i = 0;
while (fread(buf + i, 1, 1, fp) == 1 && i < 257 && buf[i])
i++;
if (feof(fp))
break;
if (buf[0] == '.') {
/*
* A special module, eg a signature block or a directory.
* Format of such a module is defined to be:
* six char type identifier
* int32_t count bytes content
* content
* so we can handle it uniformaly with RDOFF2 modules.
*/
fread(buf, 6, 1, fp);
buf[6] = 0;
/* Currently, nothing useful to do with signature block.. */
} else {
fread(buf, 6, 1, fp);
buf[6] = 0;
if (strncmp(buf, "RDOFF", 5)) {
fclose(fp);
return rdl_error = lastresult = 2;
} else if (buf[5] != '2') {
fclose(fp);
return rdl_error = lastresult = 3;
}
}
fread(&length, 4, 1, fp);
fseek(fp, length, SEEK_CUR); /* skip over the module */
}
fclose(fp);
return lastresult = 0; /* library in correct format */
}
int rdl_open(struct librarynode *lib, const char *name)
{
int i = rdl_verify(name);
if (i)
return i;
lib->fp = NULL;
lib->name = strdup(name);
lib->referenced = 0;
lib->next = NULL;
return 0;
}
int rdl_searchlib(struct librarynode *lib, const char *label, rdffile * f)
{
char buf[512];
int i, t;
void *hdr;
rdfheaderrec *r;
int32_t l;
rdl_error = 0;
lib->referenced++;
if (!lib->fp) {
lib->fp = fopen(lib->name, "rb");
if (!lib->fp) {
rdl_error = 1;
return 0;
}
} else
rewind(lib->fp);
while (!feof(lib->fp)) {
/*
* read the module name from the file, and prepend
* the library name and '.' to it.
*/
strcpy(buf, lib->name);
i = strlen(lib->name);
buf[i++] = '.';
t = i;
while (fread(buf + i, 1, 1, lib->fp) == 1 && i < 512 && buf[i])
i++;
buf[i] = 0;
if (feof(lib->fp))
break;
if (!strcmp(buf + t, ".dir")) { /* skip over directory */
fread(&l, 4, 1, lib->fp);
fseek(lib->fp, l, SEEK_CUR);
continue;
}
/*
* open the RDOFF module
*/
if (rdfopenhere(f, lib->fp, &lib->referenced, buf)) {
rdl_error = 16 * rdf_errno;
return 0;
}
/*
* read in the header, and scan for exported symbols
*/
hdr = malloc(f->header_len);
rdfloadseg(f, RDOFF_HEADER, hdr);
while ((r = rdfgetheaderrec(f))) {
if (r->type != 3) /* not an export */
continue;
if (!strcmp(r->e.label, label)) { /* match! */
free(hdr); /* reset to 'just open' */
f->header_loc = NULL; /* state... */
f->header_fp = 0;
return 1;
}
}
/* find start of next module... */
i = f->eof_offset;
rdfclose(f);
fseek(lib->fp, i, SEEK_SET);
}
/*
* close the file if nobody else is using it
*/
lib->referenced--;
if (!lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return 0;
}
int rdl_openmodule(struct librarynode *lib, int moduleno, rdffile * f)
{
char buf[512];
int i, cmod, t;
int32_t length;
lib->referenced++;
if (!lib->fp) {
lib->fp = fopen(lib->name, "rb");
if (!lib->fp) {
lib->referenced--;
return (rdl_error = 1);
}
} else
rewind(lib->fp);
cmod = -1;
while (!feof(lib->fp)) {
strcpy(buf, lib->name);
i = strlen(buf);
buf[i++] = '.';
t = i;
while (fread(buf + i, 1, 1, lib->fp) == 1 && i < 512 && buf[i])
i++;
buf[i] = 0;
if (feof(lib->fp))
break;
if (buf[t] != '.') /* special module - not counted in the numbering */
cmod++; /* of RDOFF modules - must be referred to by name */
if (cmod == moduleno) {
rdl_error = 16 *
rdfopenhere(f, lib->fp, &lib->referenced, buf);
lib->referenced--;
if (!lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return rdl_error;
}
fread(buf, 6, 1, lib->fp);
buf[6] = 0;
if (buf[t] == '.') {
/* do nothing */
} else if (strncmp(buf, "RDOFF", 5)) {
if (!--lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return rdl_error = 2;
} else if (buf[5] != '2') {
if (!--lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return rdl_error = 3;
}
fread(&length, 4, 1, lib->fp);
fseek(lib->fp, length, SEEK_CUR); /* skip over the module */
}
if (!--lib->referenced) {
fclose(lib->fp);
lib->fp = NULL;
}
return rdl_error = 4; /* module not found */
}
void rdl_perror(const char *apname, const char *filename)
{
if (rdl_error >= 16)
rdfperror(apname, filename);
else
fprintf(stderr, "%s:%s:%s\n", apname, filename,
rdl_errors[rdl_error]);
}