2 * The PCI Library -- Parsing of the ID list
4 * Copyright (c) 1997--2008 Martin Mares <mj@ucw.cz>
6 * Can be freely distributed and used under the terms of the GNU GPL v2+.
8 * SPDX-License-Identifier: GPL-2.0-or-later
19 #ifdef PCI_COMPRESSED_IDS
21 typedef gzFile pci_file;
22 #define pci_gets(f, l, s) gzgets(f, l, s)
23 #define pci_eof(f) gzeof(f)
25 static pci_file pci_open(struct pci_access *a)
31 result = gzopen(a->id_file_name, "rb");
34 len = strlen(a->id_file_name);
35 if (len < 3 || memcmp(a->id_file_name + len - 3, ".gz", 3) != 0)
37 new_name = malloc(len - 2);
38 memcpy(new_name, a->id_file_name, len - 3);
39 new_name[len - 3] = 0;
40 pci_set_name_list_path(a, new_name, 1);
41 return gzopen(a->id_file_name, "rb");
44 #define pci_close(f) gzclose(f)
45 #define PCI_ERROR(f, err) \
48 gzerror(f, &errnum); \
49 if (errnum >= 0) err = NULL; \
50 else if (errnum == Z_ERRNO) err = "I/O error"; \
51 else err = zError(errnum); \
54 typedef FILE * pci_file;
55 #define pci_gets(f, l, s) fgets(l, s, f)
56 #define pci_eof(f) feof(f)
57 #define pci_open(a) fopen(a->id_file_name, "r")
58 #define pci_close(f) fclose(f)
59 #define PCI_ERROR(f, err) if (!err && ferror(f)) err = "I/O error";
62 static int id_hex(char *p, int cnt)
68 if (*p >= '0' && *p <= '9')
70 else if (*p >= 'a' && *p <= 'f')
72 else if (*p >= 'A' && *p <= 'F')
81 static inline int id_white_p(int c)
83 return (c == ' ') || (c == '\t');
87 static const char *id_parse_list(struct pci_access *a, pci_file f, int *lino)
91 int id1=0, id2=0, id3=0, id4=0;
94 static const char parse_error[] = "Parse error";
97 while (pci_gets(f, line, sizeof(line)))
101 while (*p && *p != '\n' && *p != '\r')
103 if (!*p && !pci_eof(f))
104 return "Line too long";
106 if (p > line && (p[-1] == ' ' || p[-1] == '\t'))
110 while (id_white_p(*p))
112 if (!*p || *p == '#')
120 if (!nest) /* Top-level entries */
122 if (p[0] == 'C' && p[1] == ' ') /* Class block */
124 if ((id1 = id_hex(p+2, 2)) < 0 || !id_white_p(p[4]))
129 else if (p[0] == 'S' && p[1] == ' ')
130 { /* Generic subsystem block */
131 if ((id1 = id_hex(p+2, 4)) < 0 || p[6])
133 if (!pci_id_lookup(a, 0, ID_VENDOR, id1, 0, 0, 0))
134 return "Vendor does not exist";
135 cat = ID_GEN_SUBSYSTEM;
138 else if (p[0] >= 'A' && p[0] <= 'Z' && p[1] == ' ')
139 { /* Unrecognized block (RFU) */
145 if ((id1 = id_hex(p, 4)) < 0 || !id_white_p(p[4]))
152 else if (cat == ID_UNKNOWN) /* Nested entries in RFU blocks are skipped */
154 else if (nest == 1) /* Nesting level 1 */
160 if ((id2 = id_hex(p, 4)) < 0 || !id_white_p(p[4]))
166 case ID_GEN_SUBSYSTEM:
167 if ((id2 = id_hex(p, 4)) < 0 || !id_white_p(p[4]))
175 if ((id2 = id_hex(p, 2)) < 0 || !id_white_p(p[2]))
184 else if (nest == 2) /* Nesting level 2 */
189 if ((id3 = id_hex(p, 4)) < 0 || !id_white_p(p[4]) || (id4 = id_hex(p+5, 4)) < 0 || !id_white_p(p[9]))
197 if ((id3 = id_hex(p, 2)) < 0 || !id_white_p(p[2]))
206 else /* Nesting level 3 or more */
208 while (id_white_p(*p))
212 if (pci_id_insert(a, cat, id1, id2, id3, id4, p, SRC_LOCAL))
213 return "Duplicate entry";
219 pci_load_name_list(struct pci_access *a)
225 pci_free_name_list(a);
226 a->id_load_attempted = 1;
227 if (!(f = pci_open(a)))
229 err = id_parse_list(a, f, &lino);
233 a->error("%s at %s, line %d\n", err, a->id_file_name, lino);
238 pci_free_name_list(struct pci_access *a)
240 pci_id_cache_flush(a);
243 a->id_load_attempted = 0;
247 pci_set_name_list_path(struct pci_access *a, char *name, int to_be_freed)
250 free(a->id_file_name);
251 a->id_file_name = name;
252 a->free_id_name = to_be_freed;