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comparison bootmatch/comp_ranges.c @ 9:bfcc8180cf3c

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bootmatch compiler written
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 10 Jun 2023 02:55:29 +0000
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8:304ac8119c8a 9:bfcc8180cf3c
1 /*
2 * Bootmatch compiler: here we read and parse the *.ranges file.
3 */
4
5 #include <sys/types.h>
6 #include <ctype.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include "comp_defs.h"
10
11 extern struct range range_list[MAX_RANGES];
12 extern unsigned range_count;
13
14 static void
15 process_line(line, filename, lineno)
16 char *line, *filename;
17 {
18 char *cp;
19 struct range *rp;
20 u_long hex_start, hex_end;
21
22 for (cp = line; isspace(*cp); cp++)
23 ;
24 if (*cp == '\0' || *cp == '#')
25 return;
26 if (!isxdigit(*cp)) {
27 inv_syntax: fprintf(stderr, "%s line %d: invalid syntax\n",
28 filename, lineno);
29 exit(1);
30 }
31 hex_start = strtoul(cp, &cp, 16);
32 if (!isspace(*cp))
33 goto inv_syntax;
34 while (isspace(*cp))
35 cp++;
36 if (!isxdigit(*cp))
37 goto inv_syntax;
38 hex_end = strtoul(cp, &cp, 16);
39 if (*cp && !isspace(*cp))
40 goto inv_syntax;
41 while (isspace(*cp))
42 cp++;
43 if (*cp && *cp != '#')
44 goto inv_syntax;
45 if (hex_start >= BOOT_BLOCK_SIZE) {
46 fprintf(stderr, "%s line %d: start offset is out of range\n",
47 filename, lineno);
48 exit(1);
49 }
50 if (hex_end >= BOOT_BLOCK_SIZE) {
51 fprintf(stderr, "%s line %d: end offset is out of range\n",
52 filename, lineno);
53 exit(1);
54 }
55 if (hex_start >= hex_end) {
56 fprintf(stderr,
57 "%s line %d: end offset must be greater than start offset\n",
58 filename, lineno);
59 exit(1);
60 }
61 if (range_count >= MAX_RANGES) {
62 fprintf(stderr, "%s line %d: too many ranges defined\n",
63 filename, lineno);
64 exit(1);
65 }
66 rp = range_list + range_count;
67 rp->offset = hex_start;
68 rp->nbytes = hex_end - hex_start;
69 range_count++;
70 }
71
72 void
73 read_ranges_file(filename)
74 char *filename;
75 {
76 FILE *inf;
77 char linebuf[256];
78 int lineno;
79
80 inf = fopen(filename, "r");
81 if (!inf) {
82 perror(filename);
83 exit(1);
84 }
85 for (lineno = 1; fgets(linebuf, sizeof linebuf, inf); lineno++)
86 process_line(linebuf, filename, lineno);
87 fclose(inf);
88 if (!range_count) {
89 fprintf(stderr, "error: no ranges defined in %s\n", filename);
90 exit(1);
91 }
92 }