FreeCalypso > hg > tcs211-patches

annotate tool/readspec.c @ 0:12e230d431f0

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started writing libpatch tool
author Space Falcon <falcon@ivan.Harhan.ORG>
date Wed, 03 Jun 2015 07:40:00 +0000
parents
children
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0
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Space Falcon <falcon@ivan.Harhan.ORG>
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1 /*
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2 * This module contains the code that reads and parses the patch
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3 * description or specification ASCII text file.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <ctype.h>
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8 #include <stdio.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include "patchinfo.h"
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13 #include "globals.h"
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14
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15 static int lineno;
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16 static struct patch_module_desc **module_add_ptr = &patch_module_list;
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17 static struct patch_desc **patch_add_ptr;
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18
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19 static void
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20 set_module(name)
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21 char *name;
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22 {
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23 int len;
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24 char *buf;
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25 struct patch_module_desc *newmod;
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26
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27 len = sizeof(struct patch_module_desc) + strlen(name) + 1;
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28 buf = malloc(len);
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29 if (!buf) {
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30 perror("malloc");
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31 exit(1);
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32 }
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33 newmod = (struct patch_module_desc *) buf;
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34 newmod->member_name = buf + sizeof(struct patch_module_desc);
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35 strcpy(newmod->member_name, name);
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36 newmod->patches = 0;
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37 newmod->next = 0;
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38 *module_add_ptr = newmod;
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39 module_add_ptr = &newmod->next;
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40 patch_add_ptr = &newmod->patches;
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41 }
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42
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43 static void
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44 add_patch(argline)
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45 char *argline;
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46 {
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47 char *cp, *args[3];
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48 int i, len;
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49 char *buf;
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50 struct patch_desc *rec;
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51
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52 for (cp = argline, i = 0; i < 3; i++) {
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53 while (isspace(*cp))
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54 cp++;
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55 if (!*cp) {
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56 fprintf(stderr, "%s line %d: too few fields\n",
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57 patch_desc_filename, lineno);
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58 exit(1);
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59 }
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60 args[i] = cp;
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61 while (*cp && !isspace(*cp))
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62 cp++;
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63 if (*cp)
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64 *cp++ = '\0';
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65 }
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66 while (isspace(*cp))
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67 cp++;
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68 if (*cp) {
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69 fprintf(stderr, "%s line %d: too many fields\n",
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70 patch_desc_filename, lineno);
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71 exit(1);
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72 }
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73 if (!patch_add_ptr) {
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74 fprintf(stderr,
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75 "error: patch given before module (%s line %d)\n",
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76 patch_desc_filename, lineno);
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77 exit(1);
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78 }
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79 len = sizeof(struct patch_desc) + strlen(args[0]) + 1;
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80 buf = malloc(len);
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81 if (!buf) {
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82 perror("malloc");
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83 exit(1);
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84 }
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85 rec = (struct patch_desc *) buf;
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86 rec->section = buf + sizeof(struct patch_desc);
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87 strcpy(rec->section, args[0]);
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88 rec->offset = strtoul(args[1], 0, 16);
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89 rec->new_byte = strtoul(args[2], 0, 16);
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90 rec->next = 0;
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91 *patch_add_ptr = rec;
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92 patch_add_ptr = &rec->next;
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93 }
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94
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95 read_spec_file()
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96 {
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97 FILE *f;
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98 char linebuf[128], *cp, *np;
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99
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100 f = fopen(patch_desc_filename, "r");
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101 if (!f) {
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102 perror(patch_desc_filename);
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103 exit(1);
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104 }
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105 for (lineno = 1; fgets(linebuf, sizeof linebuf, f); lineno++) {
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106 for (cp = linebuf; isspace(*cp); cp++)
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107 ;
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108 if (!*cp || *cp == '#')
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109 continue;
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110 if (*cp == '[') {
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111 np = ++cp;
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112 cp = index(cp, ']');
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113 if (!cp) {
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114 fprintf(stderr,
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115 "%s line %d: unmatched bracket\n",
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116 patch_desc_filename, lineno);
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117 exit(1);
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118 }
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119 *cp = '\0';
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120 set_module(np);
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121 } else
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122 add_patch(cp);
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123 }
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124 fclose(f);
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125 return(0);
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126 }