1 | /* |
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2 | ** fmtxref.c |
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3 | ** |
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4 | ** format the output of the C cross referencer. |
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5 | ** this program relies on the fact that its input |
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6 | ** is sorted and uniq-ed. |
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7 | ** |
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8 | ** Arnold Robbins, Information and Computer Science, Georgia Tech |
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9 | ** gatech!arnold |
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10 | ** Copyright (c) 1984 by Arnold Robbins. |
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11 | ** All rights reserved. |
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12 | ** This program may not be sold, but may be distributed |
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13 | ** provided this header is included. |
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14 | */ |
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15 | |
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16 | #include <stdio.h> |
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17 | #include <ctype.h> |
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18 | |
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19 | #define TRUE 1 |
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20 | #define FALSE 0 |
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21 | |
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22 | #define MAXID 121 /* maximum lengths of identifiers, file names, etc. */ |
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23 | #define MAXFILE 15 |
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24 | #define MAXLINE 121 |
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25 | #define MAXNUM 7 |
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26 | |
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27 | #define ID 1 /* return codes to indicate what is new on input line */ |
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28 | #define NEWFILE 2 |
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29 | #define LINE 3 |
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30 | #define ERROR 4 |
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31 | |
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32 | #define WIDTH 80 /* default line output width */ |
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33 | |
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34 | int width = WIDTH; |
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35 | |
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36 | char prev_id[MAXID] = ""; |
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37 | char prev_file[MAXFILE] = ""; |
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38 | |
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39 | char id[MAXID] = ""; |
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40 | char file[MAXFILE] = ""; |
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41 | char line[MAXNUM] = ""; |
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42 | |
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43 | char *name; |
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44 | char *basename(); /* strips leading path name */ |
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45 | |
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46 | main(argc, argv) |
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47 | int argc; |
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48 | char **argv; |
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49 | { |
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50 | char in_line[BUFSIZ]; |
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51 | char *gets(); |
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52 | int val; |
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53 | |
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54 | name = basename(argv[0]); |
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55 | |
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56 | /* |
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57 | * since this program is ONLY called by the cxref driver, |
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58 | * we know that it will be called "fmtxref -w width" |
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59 | * so we don't have to do complicated argument parsing. |
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60 | * we also know that cxref makes sure we get a valid width. |
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61 | */ |
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62 | |
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63 | if (argc > 1) |
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64 | if (argc == 3) |
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65 | if (strcmp(argv[1], "-w") == 0) |
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66 | width = atoi(argv[2]); |
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67 | else |
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68 | usage(); |
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69 | else |
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70 | usage(); |
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71 | /* else |
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72 | use default width */ |
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73 | |
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74 | if(gets(in_line) == NULL) |
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75 | { |
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76 | fprintf(stderr, "%s: standard input is empty.\n", name); |
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77 | exit(1); |
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78 | } |
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79 | |
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80 | if((val = breakup(in_line)) == ERROR) |
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81 | { |
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82 | fprintf(stderr, "%s: malformed input '%s'\n", name, in_line); |
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83 | exit(2); |
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84 | } |
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85 | |
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86 | output(val); /* does proper formatting */ |
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87 | |
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88 | while(gets(in_line) != NULL && val != ERROR) |
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89 | { |
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90 | val = breakup(in_line); |
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91 | output(val); |
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92 | } |
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93 | |
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94 | if(val == ERROR) |
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95 | { |
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96 | fprintf(stderr, "%s: malformed input '%s'\n", name, in_line); |
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97 | exit(2); |
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98 | } |
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99 | |
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100 | putchar('\n'); |
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101 | } |
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102 | |
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103 | breakup(text) |
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104 | char *text; |
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105 | { |
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106 | int retval; |
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107 | int i, j; |
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108 | |
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109 | if(text[0] == '"' || text[0] == '\'') |
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110 | { |
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111 | /* quoted stuff, break the line up by hand */ |
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112 | |
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113 | i = 0; |
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114 | id[i++] = text[0]; |
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115 | |
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116 | for(j = 1; text[j] != text[0]; i++, j++) |
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117 | { |
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118 | id[i] = text[j]; |
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119 | if(id[i] == '\\') |
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120 | id[++i] = text[++j]; /* e.g. \" */ |
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121 | } |
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122 | id[i++] = text[0]; |
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123 | id[i] = '\0'; |
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124 | j++; /* skip close quote */ |
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125 | |
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126 | while(isspace(text[j])) |
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127 | j++; |
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128 | |
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129 | for(i = 0; !isspace(text[j]); i++, j++) |
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130 | file[i] = text[j]; |
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131 | file[i] = '\0'; |
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132 | |
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133 | |
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134 | while(isspace(text[j])) |
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135 | j++; |
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136 | |
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137 | for(i = 0; !isspace(text[j]) && text[j] != '\0'; i++, j++) |
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138 | line[i] = text[j]; |
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139 | line[i] = '\0'; |
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140 | } |
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141 | else |
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142 | { |
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143 | if(sscanf(text, "%s %s %s", id, file, line) != 3) |
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144 | return(ERROR); |
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145 | } |
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146 | |
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147 | /* now decide about return code for formatting */ |
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148 | |
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149 | if(strcmp(prev_id, id) != 0) /* different identifiers */ |
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150 | { |
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151 | strcpy(prev_id, id); |
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152 | strcpy(prev_file, file); |
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153 | retval = ID; |
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154 | } |
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155 | else if(strcmp(prev_file, file) != 0) /* different files */ |
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156 | { |
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157 | strcpy(prev_file, file); |
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158 | retval = NEWFILE; |
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159 | } |
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160 | else |
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161 | retval = LINE; |
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162 | |
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163 | return(retval); |
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164 | } |
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165 | |
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166 | output(val) |
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167 | int val; |
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168 | { |
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169 | static int curpos = 1; |
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170 | static int first = TRUE; |
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171 | int line_len = strlen(line); |
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172 | |
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173 | switch(val) { |
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174 | case ID: |
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175 | if(! first) |
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176 | putchar('\n'); /* finish off last line of prev id */ |
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177 | else |
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178 | first = FALSE; |
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179 | |
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180 | printf("%-20.20s\t%-14.14s\t%s", id, file, line); |
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181 | curpos = 40 + line_len; |
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182 | break; |
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183 | |
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184 | case NEWFILE: |
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185 | printf("\n\t\t\t%-14.14s\t%s", file, line); |
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186 | curpos = 40 + line_len; |
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187 | break; |
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188 | |
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189 | case LINE: |
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190 | if(curpos + line_len + 2 < width) |
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191 | { |
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192 | printf(", %s", line); /* same output line */ |
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193 | curpos += 2 + line_len; |
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194 | } |
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195 | else |
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196 | { |
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197 | printf(",\n\t\t\t\t\t%s", line); /* new line */ |
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198 | curpos = 40 + line_len; |
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199 | } |
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200 | break; |
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201 | |
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202 | case ERROR: |
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203 | /* shouldn't come to here */ |
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204 | fprintf(stderr, "%s: internal error: output() called with %s\n", |
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205 | name, "a value of ERROR"); |
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206 | fprintf(stderr, "%s: id == '%s'\tfile == '%s'\tline == '%s'\n", |
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207 | name, id, file, line); |
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208 | break; |
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209 | |
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210 | default: |
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211 | /* shouldn't come to here either */ |
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212 | fprintf(stderr, "%s: internal error: output() called with %s %d\n", |
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213 | name, "the unknown value", val); |
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214 | fprintf(stderr, "%s: id == '%s'\tfile == '%s'\tline == '%s'\n", |
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215 | name, id, file, line); |
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216 | break; |
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217 | } |
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218 | } |
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219 | |
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220 | usage() |
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221 | { |
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222 | char *basename(); |
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223 | |
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224 | fprintf(stderr, "usage: %s [-w width]\n", basename(name)); |
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225 | exit (1); |
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226 | } |
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227 | |
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228 | #include "basename.c" |
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