2 * rdlib.c - routines for manipulating RDOFF libraries (.rdl)
17 /* See Texinfo documentation about new RDOFF libraries format */
21 char *rdl_errors[5] = {
22 "no error", "could not open file", "invalid file structure",
23 "file contains modules of an unsupported RDOFF version",
27 int rdl_verify(const char *filename)
29 FILE *fp = fopen(filename, "rb");
33 static char lastverified[256];
34 static int lastresult = -1;
36 if (lastresult != -1 && !strcmp(filename, lastverified))
39 strcpy(lastverified, filename);
42 return (rdl_error = lastresult = 1);
47 while (fread(buf + i, 1, 1, fp) == 1 && buf[i] && i < 257)
54 * A special module, eg a signature block or a directory.
55 * Format of such a module is defined to be:
56 * six char type identifier
57 * int32_t count bytes content
59 * so we can handle it uniformaly with RDOFF2 modules.
63 /* Currently, nothing useful to do with signature block.. */
67 if (strncmp(buf, "RDOFF", 5)) {
68 return rdl_error = lastresult = 2;
69 } else if (buf[5] != '2') {
70 return rdl_error = lastresult = 3;
73 fread(&length, 4, 1, fp);
74 fseek(fp, length, SEEK_CUR); /* skip over the module */
77 return lastresult = 0; /* library in correct format */
80 int rdl_open(struct librarynode *lib, const char *name)
82 int i = rdl_verify(name);
87 lib->name = strdup(name);
93 void rdl_close(struct librarynode *lib)
100 int rdl_searchlib(struct librarynode *lib, const char *label, rdffile * f)
112 lib->fp = fopen(lib->name, "rb");
121 while (!feof(lib->fp)) {
123 * read the module name from the file, and prepend
124 * the library name and '.' to it.
126 strcpy(buf, lib->name);
128 i = strlen(lib->name);
131 while (fread(buf + i, 1, 1, lib->fp) == 1 && buf[i] && i < 512)
138 if (!strcmp(buf + t, ".dir")) { /* skip over directory */
139 fread(&l, 4, 1, lib->fp);
140 fseek(lib->fp, l, SEEK_CUR);
144 * open the RDOFF module
146 if (rdfopenhere(f, lib->fp, &lib->referenced, buf)) {
147 rdl_error = 16 * rdf_errno;
151 * read in the header, and scan for exported symbols
153 hdr = malloc(f->header_len);
154 rdfloadseg(f, RDOFF_HEADER, hdr);
156 while ((r = rdfgetheaderrec(f))) {
157 if (r->type != 3) /* not an export */
160 if (!strcmp(r->e.label, label)) { /* match! */
161 free(hdr); /* reset to 'just open' */
162 f->header_loc = NULL; /* state... */
168 /* find start of next module... */
171 fseek(lib->fp, i, SEEK_SET);
175 * close the file if nobody else is using it
178 if (!lib->referenced) {
185 int rdl_openmodule(struct librarynode *lib, int moduleno, rdffile * f)
194 lib->fp = fopen(lib->name, "rb");
197 return (rdl_error = 1);
203 while (!feof(lib->fp)) {
204 strcpy(buf, lib->name);
208 while (fread(buf + i, 1, 1, lib->fp) == 1 && buf[i] && i < 512)
214 if (buf[t] != '.') /* special module - not counted in the numbering */
215 cmod++; /* of RDOFF modules - must be referred to by name */
217 if (cmod == moduleno) {
219 rdfopenhere(f, lib->fp, &lib->referenced, buf);
221 if (!lib->referenced) {
228 fread(buf, 6, 1, lib->fp);
232 } else if (strncmp(buf, "RDOFF", 5)) {
233 if (!--lib->referenced) {
237 return rdl_error = 2;
238 } else if (buf[5] != '2') {
239 if (!--lib->referenced) {
243 return rdl_error = 3;
246 fread(&length, 4, 1, lib->fp);
247 fseek(lib->fp, length, SEEK_CUR); /* skip over the module */
249 if (!--lib->referenced) {
253 return rdl_error = 4; /* module not found */
256 void rdl_perror(const char *apname, const char *filename)
259 rdfperror(apname, filename);
261 fprintf(stderr, "%s:%s:%s\n", apname, filename,
262 rdl_errors[rdl_error]);