| 1 | /* (C) 1998 Red Hat Software, Inc. -- Licensing details are in the COPYING |
| 2 | file accompanying popt source distributions, available from |
| 3 | ftp://ftp.redhat.com/pub/code/popt */ |
| 4 | |
| 5 | #ifdef HAVE_CONFIG_H |
| 6 | #include "config.h" |
| 7 | #endif |
| 8 | |
| 9 | #include <ctype.h> |
| 10 | #include <stdio.h> |
| 11 | #include <stdlib.h> |
| 12 | #include <string.h> |
| 13 | |
| 14 | #include "popt.h" |
| 15 | #include "poptint.h" |
| 16 | |
| 17 | static void displayArgs(poptContext con, enum poptCallbackReason foo, |
| 18 | struct poptOption * key, |
| 19 | const char * arg, void * data) { |
| 20 | if (key->shortName== '?') |
| 21 | poptPrintHelp(con, stderr, 0); |
| 22 | else |
| 23 | poptPrintUsage(con, stderr, 0); |
| 24 | exit(0); |
| 25 | } |
| 26 | |
| 27 | struct poptOption poptHelpOptions[] = { |
| 28 | { NULL, '\0', POPT_ARG_CALLBACK, &displayArgs, '\0', NULL }, |
| 29 | { "help", '?', 0, NULL, '?', N_("Show this help message") }, |
| 30 | { "usage", '\0', 0, NULL, 'u', N_("Display brief usage message") }, |
| 31 | { NULL, '\0', 0, NULL, 0 } |
| 32 | } ; |
| 33 | |
| 34 | static const char * getArgDescrip(const struct poptOption * opt) { |
| 35 | if (!(opt->argInfo & POPT_ARG_MASK)) return NULL; |
| 36 | |
| 37 | if (opt == (poptHelpOptions + 1) || opt == (poptHelpOptions + 2)) |
| 38 | if (opt->argDescrip) return POPT_(opt->argDescrip); |
| 39 | |
| 40 | if (opt->argDescrip) return _(opt->argDescrip); |
| 41 | return POPT_("ARG"); |
| 42 | } |
| 43 | |
| 44 | static void singleOptionHelp(FILE * f, int maxLeftCol, |
| 45 | const struct poptOption * opt) { |
| 46 | int indentLength = maxLeftCol + 5; |
| 47 | int lineLength = 79 - indentLength; |
| 48 | const char * help = _(opt->descrip); |
| 49 | int helpLength; |
| 50 | const char * ch; |
| 51 | char format[10]; |
| 52 | char * left = alloca(maxLeftCol + 1); |
| 53 | const char * argDescrip = getArgDescrip(opt); |
| 54 | |
| 55 | *left = '\0'; |
| 56 | if (opt->longName && opt->shortName) |
| 57 | sprintf(left, "-%c, --%s", opt->shortName, opt->longName); |
| 58 | else if (opt->shortName) |
| 59 | sprintf(left, "-%c", opt->shortName); |
| 60 | else if (opt->longName) |
| 61 | sprintf(left, "--%s", opt->longName); |
| 62 | if (!*left) return ; |
| 63 | if (argDescrip) { |
| 64 | strcat(left, "="); |
| 65 | strcat(left, argDescrip); |
| 66 | } |
| 67 | |
| 68 | if (help) |
| 69 | fprintf(f," %-*s ", maxLeftCol, left); |
| 70 | else { |
| 71 | fprintf(f," %s\n", left); |
| 72 | return; |
| 73 | } |
| 74 | |
| 75 | helpLength = strlen(help); |
| 76 | while (helpLength > lineLength) { |
| 77 | ch = help + lineLength - 1; |
| 78 | while (ch > help && !isspace(*ch)) ch--; |
| 79 | if (ch == help) break; /* give up */ |
| 80 | while (ch > (help + 1) && isspace(*ch)) ch--; |
| 81 | ch++; |
| 82 | |
| 83 | sprintf(format, "%%.%ds\n%%%ds", (int) (ch - help), indentLength); |
| 84 | fprintf(f, format, help, " "); |
| 85 | help = ch; |
| 86 | while (isspace(*help) && *help) help++; |
| 87 | helpLength = strlen(help); |
| 88 | } |
| 89 | |
| 90 | if (helpLength) fprintf(f, "%s\n", help); |
| 91 | } |
| 92 | |
| 93 | static int maxArgWidth(const struct poptOption * opt) { |
| 94 | int max = 0; |
| 95 | int this; |
| 96 | const char * s; |
| 97 | |
| 98 | while (opt->longName || opt->shortName || opt->arg) { |
| 99 | if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) { |
| 100 | this = maxArgWidth(opt->arg); |
| 101 | if (this > max) max = this; |
| 102 | } else if (!(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) { |
| 103 | this = opt->shortName ? 2 : 0; |
| 104 | if (opt->longName) { |
| 105 | if (this) this += 2; |
| 106 | this += strlen(opt->longName) + 2; |
| 107 | } |
| 108 | |
| 109 | s = getArgDescrip(opt); |
| 110 | if (s) |
| 111 | this += strlen(s) + 1; |
| 112 | if (this > max) max = this; |
| 113 | } |
| 114 | |
| 115 | opt++; |
| 116 | } |
| 117 | |
| 118 | return max; |
| 119 | } |
| 120 | |
| 121 | static void singleTableHelp(FILE * f, const struct poptOption * table, |
| 122 | int left) { |
| 123 | const struct poptOption * opt; |
| 124 | |
| 125 | opt = table; |
| 126 | while (opt->longName || opt->shortName || opt->arg) { |
| 127 | if ((opt->longName || opt->shortName) && |
| 128 | !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) |
| 129 | singleOptionHelp(f, left, opt); |
| 130 | opt++; |
| 131 | } |
| 132 | |
| 133 | opt = table; |
| 134 | while (opt->longName || opt->shortName || opt->arg) { |
| 135 | if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) { |
| 136 | if (opt->descrip) |
| 137 | fprintf(f, "\n%s\n", _(opt->descrip)); |
| 138 | singleTableHelp(f, opt->arg, left); |
| 139 | } |
| 140 | opt++; |
| 141 | } |
| 142 | } |
| 143 | |
| 144 | static int showHelpIntro(poptContext con, FILE * f) { |
| 145 | int len = 6; |
| 146 | char * fn; |
| 147 | |
| 148 | fprintf(f, POPT_("Usage:")); |
| 149 | if (!(con->flags & POPT_CONTEXT_KEEP_FIRST)) { |
| 150 | fn = con->optionStack->argv[0]; |
| 151 | if (strchr(fn, '/')) fn = strchr(fn, '/') + 1; |
| 152 | fprintf(f, " %s", fn); |
| 153 | len += strlen(fn) + 1; |
| 154 | } |
| 155 | |
| 156 | return len; |
| 157 | } |
| 158 | |
| 159 | void poptPrintHelp(poptContext con, FILE * f, int flags) { |
| 160 | int leftColWidth; |
| 161 | |
| 162 | showHelpIntro(con, f); |
| 163 | if (con->otherHelp) |
| 164 | fprintf(f, " %s\n", con->otherHelp); |
| 165 | else |
| 166 | fprintf(f, " %s\n", POPT_("[OPTION...]")); |
| 167 | |
| 168 | leftColWidth = maxArgWidth(con->options); |
| 169 | singleTableHelp(f, con->options, leftColWidth); |
| 170 | } |
| 171 | |
| 172 | static int singleOptionUsage(FILE * f, int cursor, |
| 173 | const struct poptOption * opt) { |
| 174 | int len = 3; |
| 175 | char shortStr[2]; |
| 176 | const char * item = shortStr; |
| 177 | const char * argDescrip = getArgDescrip(opt); |
| 178 | |
| 179 | if (opt->shortName) { |
| 180 | if (!(opt->argInfo & POPT_ARG_MASK)) |
| 181 | return cursor; /* we did these already */ |
| 182 | len++; |
| 183 | *shortStr = opt->shortName; |
| 184 | shortStr[1] = '\0'; |
| 185 | } else if (opt->longName) { |
| 186 | len += 1 + strlen(opt->longName); |
| 187 | item = opt->longName; |
| 188 | } |
| 189 | |
| 190 | if (len == 3) return cursor; |
| 191 | |
| 192 | if (argDescrip) |
| 193 | len += strlen(argDescrip) + 1; |
| 194 | |
| 195 | if ((cursor + len) > 79) { |
| 196 | fprintf(f, "\n "); |
| 197 | cursor = 7; |
| 198 | } |
| 199 | |
| 200 | fprintf(f, " [-%s%s%s%s]", opt->shortName ? "" : "-", item, |
| 201 | argDescrip ? (opt->shortName ? " " : "=") : "", |
| 202 | argDescrip ? argDescrip : ""); |
| 203 | |
| 204 | return cursor + len + 1; |
| 205 | } |
| 206 | |
| 207 | int singleTableUsage(FILE * f, int cursor, const struct poptOption * table) { |
| 208 | const struct poptOption * opt; |
| 209 | |
| 210 | opt = table; |
| 211 | while (opt->longName || opt->shortName || opt->arg) { |
| 212 | if ((opt->longName || opt->shortName) && |
| 213 | !(opt->argInfo & POPT_ARGFLAG_DOC_HIDDEN)) |
| 214 | cursor = singleOptionUsage(f, cursor, opt); |
| 215 | else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) |
| 216 | cursor = singleTableUsage(f, cursor, opt->arg); |
| 217 | opt++; |
| 218 | } |
| 219 | |
| 220 | return cursor; |
| 221 | } |
| 222 | |
| 223 | static int showShortOptions(const struct poptOption * opt, FILE * f, |
| 224 | char * str) { |
| 225 | char s[300]; /* this is larger then the ascii set, so |
| 226 | it should do just fine */ |
| 227 | |
| 228 | if (!str) { |
| 229 | str = s; |
| 230 | memset(str, 0, sizeof(str)); |
| 231 | } |
| 232 | |
| 233 | while (opt->longName || opt->shortName || opt->arg) { |
| 234 | if (opt->shortName && !(opt->argInfo & POPT_ARG_MASK)) |
| 235 | str[strlen(str)] = opt->shortName; |
| 236 | else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) |
| 237 | showShortOptions(opt->arg, f, str); |
| 238 | |
| 239 | opt++; |
| 240 | } |
| 241 | |
| 242 | if (s != str || !*s) |
| 243 | return 0; |
| 244 | |
| 245 | fprintf(f, " [-%s]", s); |
| 246 | return strlen(s) + 4; |
| 247 | } |
| 248 | |
| 249 | void poptPrintUsage(poptContext con, FILE * f, int flags) { |
| 250 | int cursor; |
| 251 | |
| 252 | cursor = showHelpIntro(con, f); |
| 253 | cursor += showShortOptions(con->options, f, NULL); |
| 254 | singleTableUsage(f, cursor, con->options); |
| 255 | |
| 256 | if (con->otherHelp) { |
| 257 | cursor += strlen(con->otherHelp) + 1; |
| 258 | if (cursor > 79) fprintf(f, "\n "); |
| 259 | fprintf(f, " %s", con->otherHelp); |
| 260 | } |
| 261 | |
| 262 | fprintf(f, "\n"); |
| 263 | } |
| 264 | |
| 265 | void poptSetOtherOptionHelp(poptContext con, const char * text) { |
| 266 | if (con->otherHelp) free(con->otherHelp); |
| 267 | con->otherHelp = strdup(text); |
| 268 | } |