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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "popt.h"
#include "poptint.h"
static void displayArgs(poptContext con, struct poptOption * key,
const char * arg, void * data) {
if (key->shortName== '?')
poptPrintHelp(con, stderr, 0);
else
poptPrintUsage(con, stderr, 0);
exit(0);
}
struct poptOption poptHelpOptions[] = {
{ NULL, '\0', POPT_ARG_CALLBACK, &displayArgs, '\0', NULL },
{ "help", '?', 0, NULL, '?', "Show this help message" },
{ "usage", '\0', 0, NULL, 'u', "Display brief usage message" },
{ NULL, '\0', 0, NULL, 0 }
} ;
static void singleOptionHelp(FILE * f, int maxLeftCol,
const struct poptOption * opt) {
int indentLength = maxLeftCol + 5;
int lineLength = 79 - indentLength;
const char * help = opt->descrip;
int helpLength;
const char * ch;
char format[10];
char * left = alloca(maxLeftCol + 1);
*left = '\0';
if (opt->longName && opt->shortName)
sprintf(left, "-%c, --%s", opt->shortName, opt->longName);
else if (opt->shortName)
sprintf(left, "-%c", opt->shortName);
else if (opt->longName)
sprintf(left, "--%s", opt->longName);
if (!*left) return ;
if (opt->argDescrip) {
strcat(left, "=");
strcat(left, opt->argDescrip);
}
if (help)
fprintf(f," %-*s ", maxLeftCol, left);
else {
fprintf(f," %s\n", left);
return;
}
helpLength = strlen(help);
while (helpLength > lineLength) {
ch = help + lineLength - 1;
while (ch > help && !isspace(*ch)) ch--;
if (ch == help) break; /* give up */
while (ch > (help + 1) && isspace(*ch)) ch--;
ch++;
sprintf(format, "%%.%ds\n%%%ds", (int) (ch - help), indentLength);
fprintf(f, format, help, " ");
help = ch;
while (isspace(*help) && *help) help++;
helpLength = strlen(help);
}
if (helpLength) fprintf(f, "%s\n", help);
}
static int maxArgWidth(const struct poptOption * opt) {
int max = 0;
int this;
while (opt->longName || opt->shortName || opt->arg) {
if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) {
this = maxArgWidth(opt->arg);
} else {
this = opt->shortName ? 2 : 0;
if (opt->longName) {
if (this) this += 2;
this += strlen(opt->longName) + 2;
}
if (opt->argDescrip)
this += strlen(opt->argDescrip) + 1;
}
if (this > max) max = this;
opt++;
}
return max;
}
static void singleTableHelp(FILE * f, const struct poptOption * table,
int left) {
const struct poptOption * opt;
opt = table;
while (opt->longName || opt->shortName || opt->arg) {
if (opt->longName || opt->shortName)
singleOptionHelp(f, left, opt);
opt++;
}
opt = table;
while (opt->longName || opt->shortName || opt->arg) {
if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE) {
if (opt->descrip)
fprintf(f, "\n%s\n", opt->descrip);
singleTableHelp(f, opt->arg, left);
}
opt++;
}
}
static int showHelpIntro(poptContext con, FILE * f) {
int len = 6;
char * fn;
fprintf(f, "Usage:");
if (!(con->flags & POPT_CONTEXT_KEEP_FIRST)) {
fn = con->optionStack->argv[0];
if (strchr(fn, '/')) fn = strchr(fn, '/') + 1;
fprintf(f, " %s", fn);
len += strlen(fn) + 1;
}
return len;
}
void poptPrintHelp(poptContext con, FILE * f, int flags) {
int leftColWidth;
showHelpIntro(con, f);
if (con->otherHelp)
fprintf(f, " %s\n", con->otherHelp);
else
fprintf(f, " [OPTION...]\n");
leftColWidth = maxArgWidth(con->options);
singleTableHelp(f, con->options, leftColWidth);
}
static int singleOptionUsage(FILE * f, int cursor,
const struct poptOption * opt) {
int len = 3;
char shortStr[2];
const char * item = shortStr;
if (opt->shortName) {
if (!(opt->argInfo & POPT_ARG_MASK))
return cursor; /* we did these already */
len++;
*shortStr = opt->shortName;
shortStr[1] = '\0';
} else if (opt->longName) {
len += 1 + strlen(opt->longName);
item = opt->longName;
}
if (len == 3) return cursor;
if (opt->argDescrip)
len += strlen(opt->argDescrip) + 1;
if ((cursor + len) > 79) {
fprintf(f, "\n ");
cursor = 7;
}
fprintf(f, " [-%s%s%s%s]", opt->shortName ? "" : "-", item,
opt->argDescrip ? "=" : "",
opt->argDescrip ? opt->argDescrip : "");
return cursor + len + 1;
}
int singleTableUsage(FILE * f, int cursor, const struct poptOption * table) {
const struct poptOption * opt;
opt = table;
while (opt->longName || opt->shortName || opt->arg) {
if (opt->longName || opt->shortName)
cursor = singleOptionUsage(f, cursor, opt);
else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE)
cursor = singleTableUsage(f, cursor, opt->arg);
opt++;
}
return cursor;
}
static int showShortOptions(const struct poptOption * opt, FILE * f,
char * str) {
char s[300]; /* this is larger then the ascii set, so
it should do just fine */
if (!str) {
str = s;
memset(str, 0, sizeof(str));
}
while (opt->longName || opt->shortName || opt->arg) {
if (opt->shortName && !(opt->argInfo & POPT_ARG_MASK))
str[strlen(str)] = opt->shortName;
else if ((opt->argInfo & POPT_ARG_MASK) == POPT_ARG_INCLUDE_TABLE)
showShortOptions(opt->arg, f, str);
opt++;
}
if (s != str || !*s)
return 0;
fprintf(f, " [-%s]", s);
return strlen(s) + 4;
}
void poptPrintUsage(poptContext con, FILE * f, int flags) {
int cursor;
cursor = showHelpIntro(con, f);
cursor += showShortOptions(con->options, f, NULL);
singleTableUsage(f, cursor, con->options);
if (con->otherHelp) {
cursor += strlen(con->otherHelp) + 1;
if (cursor > 79) fprintf(f, "\n ");
fprintf(f, " %s", con->otherHelp);
}
fprintf(f, "\n");
}
void poptSetOtherOptionHelp(poptContext con, const char * text) {
if (con->otherHelp) free(con->otherHelp);
con->otherHelp = strdup(text);
}
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