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authormidipix <writeonce@midipix.org>2016-03-04 13:32:05 -0500
committermidipix <writeonce@midipix.org>2016-03-08 14:21:05 -0500
commit9ca8c4c3c1b2cb1b22a3ff04c1c37b0863dd87f6 (patch)
treed1659a6814efef596730d6da5247b3fdd58d179b /src/internal/argv
parent0ff546cab29192407bf991bf915dce52c049c387 (diff)
downloadslibtool-9ca8c4c3c1b2cb1b22a3ff04c1c37b0863dd87f6.tar.bz2
slibtool-9ca8c4c3c1b2cb1b22a3ff04c1c37b0863dd87f6.tar.xz
created skeleton.
Diffstat (limited to 'src/internal/argv')
-rw-r--r--src/internal/argv/argv.h1053
1 files changed, 1053 insertions, 0 deletions
diff --git a/src/internal/argv/argv.h b/src/internal/argv/argv.h
new file mode 100644
index 0000000..4f037fb
--- /dev/null
+++ b/src/internal/argv/argv.h
@@ -0,0 +1,1053 @@
+/****************************************************************************/
+/* argv.h: a thread-safe argument vector parser and usage screen generator */
+/* Copyright (C) 2015--2016 Z. Gilboa */
+/* Released under the Standard MIT License; see COPYING.SOFORT. */
+/* This file is (also) part of sofort: portable software project template. */
+/****************************************************************************/
+
+#ifndef ARGV_H
+#define ARGV_H
+
+#include <stdbool.h>
+#include <stdint.h>
+#include <stddef.h>
+#include <errno.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
+
+#define ARGV_VERBOSITY_NONE 0x00
+#define ARGV_VERBOSITY_ERRORS 0x01
+#define ARGV_VERBOSITY_STATUS 0x02
+#define ARGV_CLONE_VECTOR 0x80
+
+#ifndef ARGV_TAB_WIDTH
+#define ARGV_TAB_WIDTH 8
+#endif
+
+/*******************************************/
+/* */
+/* support of hybrid options */
+/* ------------------------- */
+/* hybrid options are very similar to */
+/* long options, yet are prefixed by */
+/* a single dash rather than two */
+/* (i.e. -std, -isystem). */
+/* hybrid options are supported by this */
+/* driver for compatibility with legacy */
+/* tools; note, however, that the use */
+/* of hybrid options should be strongly */
+/* discouraged due to the limitations */
+/* they impose on short options (for */
+/* example, a driver implementing -std */
+/* may not provide -s as a short option */
+/* that takes an arbitrary value). */
+/* */
+/* SPACE: -hybrid VALUE (i.e. -MF file) */
+/* EQUAL: -hybrid=VALUE (i.e. -std=c99) */
+/* COMMA: -hybrid,VALUE (i.e. -Wl,<arg>) */
+/* ONLY: -opt accepted, --opt rejected */
+/* JOINED: -optVALUE */
+/* */
+/*******************************************/
+
+
+#define ARGV_OPTION_HYBRID_NONE 0x00
+#define ARGV_OPTION_HYBRID_ONLY 0x01
+#define ARGV_OPTION_HYBRID_SPACE 0x02
+#define ARGV_OPTION_HYBRID_EQUAL 0x04
+#define ARGV_OPTION_HYBRID_COMMA 0x08
+#define ARGV_OPTION_HYBRID_JOINED 0x10
+#define ARGV_OPTION_HYBRID_CIRCUS (ARGV_OPTION_HYBRID_SPACE \
+ | ARGV_OPTION_HYBRID_JOINED)
+#define ARGV_OPTION_HYBRID_DUAL (ARGV_OPTION_HYBRID_SPACE \
+ | ARGV_OPTION_HYBRID_EQUAL)
+#define ARGV_OPTION_HYBRID_SWITCH (ARGV_OPTION_HYBRID_SPACE \
+ | ARGV_OPTION_HYBRID_EQUAL \
+ | ARGV_OPTION_HYBRID_COMMA \
+ | ARGV_OPTION_HYBRID_JOINED)
+
+enum argv_optarg {
+ ARGV_OPTARG_NONE,
+ ARGV_OPTARG_REQUIRED,
+ ARGV_OPTARG_OPTIONAL,
+};
+
+enum argv_mode {
+ ARGV_MODE_SCAN,
+ ARGV_MODE_COPY,
+};
+
+enum argv_error {
+ ARGV_ERROR_OK,
+ ARGV_ERROR_INTERNAL,
+ ARGV_ERROR_SHORT_OPTION,
+ ARGV_ERROR_LONG_OPTION,
+ ARGV_ERROR_OPTARG_NONE,
+ ARGV_ERROR_OPTARG_REQUIRED,
+ ARGV_ERROR_OPTARG_PARADIGM,
+ ARGV_ERROR_HYBRID_NONE,
+ ARGV_ERROR_HYBRID_ONLY,
+ ARGV_ERROR_HYBRID_SPACE,
+ ARGV_ERROR_HYBRID_EQUAL,
+ ARGV_ERROR_HYBRID_COMMA,
+};
+
+struct argv_option {
+ const char * long_name;
+ const char short_name;
+ int tag;
+ enum argv_optarg optarg;
+ int flags;
+ const char * paradigm;
+ const char * argname;
+ const char * description;
+};
+
+struct argv_entry {
+ const char * arg;
+ int tag;
+ bool fopt;
+ bool fval;
+ bool fnoscan;
+ enum argv_error errcode;
+};
+
+struct argv_meta {
+ char ** argv;
+ struct argv_entry * entries;
+};
+
+struct argv_meta_impl {
+ char ** argv;
+ char * strbuf;
+ struct argv_meta meta;
+};
+
+struct argv_ctx {
+ int flags;
+ int mode;
+ int nentries;
+ int unitidx;
+ int erridx;
+ enum argv_error errcode;
+ const char * errch;
+ const struct argv_option * erropt;
+ const char * program;
+};
+
+#ifdef ARGV_DRIVER
+
+static const char * argv_program_name(const char *);
+
+static void argv_usage(
+ FILE *,
+ const char * header,
+ const struct argv_option[],
+ const char * mode);
+
+static struct argv_meta * argv_get(
+ char **,
+ const struct argv_option[],
+ int flags);
+
+static void argv_free(struct argv_meta *);
+
+
+
+
+/*------------------------------------*/
+/* implementation of static functions */
+/*------------------------------------*/
+
+static const struct argv_option * argv_short_option(
+ const char * ch,
+ const struct argv_option options[],
+ struct argv_entry * entry)
+{
+ const struct argv_option * option;
+
+ for (option=options; option->long_name || option->short_name; option++) {
+ if (option->short_name == *ch) {
+ entry->tag = option->tag;
+ entry->fopt = true;
+ return option;
+ }
+ }
+
+ return 0;
+}
+
+static const struct argv_option * argv_long_option(
+ const char * ch,
+ const struct argv_option options[],
+ struct argv_entry * entry)
+{
+ const struct argv_option * option;
+ const char * arg;
+ size_t len;
+
+ for (option=options; option->long_name || option->short_name; option++) {
+ len = option->long_name ? strlen(option->long_name) : 0;
+
+ if (len && !(strncmp(option->long_name,ch,len))) {
+ arg = ch + len;
+
+ if (!*arg
+ || (*arg == '=')
+ || (option->flags & ARGV_OPTION_HYBRID_JOINED)
+ || ((option->flags & ARGV_OPTION_HYBRID_COMMA)
+ && (*arg == ','))) {
+ entry->tag = option->tag;
+ entry->fopt = true;
+ return option;
+ }
+ }
+ }
+
+ return 0;
+}
+
+static inline bool is_short_option(const char * arg)
+{
+ return (arg[0]=='-') && arg[1] && (arg[1]!='-');
+}
+
+static inline bool is_long_option(const char * arg)
+{
+ return (arg[0]=='-') && (arg[1]=='-') && arg[2];
+}
+
+static inline bool is_last_option(const char * arg)
+{
+ return (arg[0]=='-') && (arg[1]=='-') && !arg[2];
+}
+
+static inline bool is_hybrid_option(
+ const char * arg,
+ const struct argv_option options[])
+{
+ const struct argv_option * option;
+ struct argv_entry entry;
+
+ if (!is_short_option(arg))
+ return false;
+
+ if (!(option = argv_long_option(++arg,options,&entry)))
+ return false;
+
+ if (!(option->flags & ARGV_OPTION_HYBRID_SWITCH))
+ if (argv_short_option(arg,options,&entry))
+ return false;
+
+ return true;
+}
+
+static inline bool is_arg_in_paradigm(const char * arg, const char * paradigm)
+{
+ size_t len;
+ const char * ch;
+
+ for (ch=paradigm,len=strlen(arg); ch; ) {
+ if (!strncmp(arg,ch,len)) {
+ if (!*(ch += len))
+ return true;
+ else if (*ch == '|')
+ return true;
+ }
+
+ if ((ch = strchr(ch,'|')))
+ ch++;
+ }
+
+ return false;
+}
+
+static inline const struct argv_option * option_from_tag(
+ const struct argv_option options[],
+ int tag)
+{
+ const struct argv_option * option;
+
+ for (option=options; option->short_name || option->long_name; option++)
+ if (option->tag == tag)
+ return option;
+ return 0;
+}
+
+static void argv_scan(
+ char ** argv,
+ const struct argv_option options[],
+ struct argv_ctx * ctx,
+ struct argv_meta * meta)
+{
+ char ** parg;
+ const char * ch;
+ const char * val;
+ const struct argv_option * option;
+ struct argv_entry entry;
+ struct argv_entry * mentry;
+ enum argv_error ferr;
+ bool fval;
+ bool fnext;
+ bool fshort;
+ bool fhybrid;
+ bool fnoscan;
+
+ parg = &argv[1];
+ ch = *parg;
+ ferr = ARGV_ERROR_OK;
+ fshort = false;
+ fnoscan = false;
+ fval = false;
+ mentry = meta ? meta->entries : 0;
+
+ ctx->unitidx = 0;
+ ctx->erridx = 0;
+
+ while (ch && (ferr == ARGV_ERROR_OK)) {
+ option = 0;
+ fhybrid = false;
+
+ if (fnoscan)
+ fval = true;
+
+ else if (is_last_option(ch))
+ fnoscan = true;
+
+ else if (!fshort && is_hybrid_option(ch,options))
+ fhybrid = true;
+
+ if (!fnoscan && !fhybrid && (fshort || is_short_option(ch))) {
+ if (!fshort)
+ ch++;
+
+ if ((option = argv_short_option(ch,options,&entry))) {
+ if (ch[1]) {
+ ch++;
+ fnext = false;
+ fshort = (option->optarg == ARGV_OPTARG_NONE);
+ } else {
+ parg++;
+ ch = *parg;
+ fnext = true;
+ fshort = false;
+ }
+
+ if (option->optarg == ARGV_OPTARG_NONE) {
+ if (!fnext && ch && (*ch == '-'))
+ ferr = ARGV_ERROR_OPTARG_NONE;
+ else
+ fval = false;
+ } else if (!fnext)
+ fval = true;
+ else if (option->optarg == ARGV_OPTARG_REQUIRED) {
+ if (ch && is_short_option(ch))
+ ferr = ARGV_ERROR_OPTARG_REQUIRED;
+ else if (ch && is_long_option(ch))
+ ferr = ARGV_ERROR_OPTARG_REQUIRED;
+ else if (ch && is_last_option(ch))
+ ferr = ARGV_ERROR_OPTARG_REQUIRED;
+ else if (ch)
+ fval = true;
+ else
+ ferr = ARGV_ERROR_OPTARG_REQUIRED;
+ } else {
+ /* ARGV_OPTARG_OPTIONAL */
+ if (ch && is_short_option(ch))
+ fval = false;
+ else if (ch && is_long_option(ch))
+ fval = false;
+ else if (ch && is_last_option(ch))
+ fval = false;
+ else
+ fval = ch;
+ }
+ } else
+ ferr = ARGV_ERROR_SHORT_OPTION;
+
+ } else if (!fnoscan && (fhybrid || is_long_option(ch))) {
+ ch += (fhybrid ? 1 : 2);
+
+ if ((option = argv_long_option(ch,options,&entry))) {
+ val = ch + strlen(option->long_name);
+
+ /* val[0] is either '=' (or ',') or '\0' */
+ if (!val[0]) {
+ parg++;
+ ch = *parg;
+ }
+
+ if (fhybrid && !(option->flags & ARGV_OPTION_HYBRID_SWITCH))
+ ferr = ARGV_ERROR_HYBRID_NONE;
+ else if (option->optarg == ARGV_OPTARG_NONE) {
+ if (val[0]) {
+ ferr = ARGV_ERROR_OPTARG_NONE;
+ ctx->errch = val + 1;
+ } else
+ fval = false;
+ } else if (!fhybrid && (option->flags & ARGV_OPTION_HYBRID_ONLY))
+ ferr = ARGV_ERROR_HYBRID_ONLY;
+ else if (val[0] && (option->flags & ARGV_OPTION_HYBRID_JOINED)) {
+ fval = true;
+ ch = val;
+ } else if (fhybrid && !val[0] && !(option->flags & ARGV_OPTION_HYBRID_SPACE))
+ ferr = ARGV_ERROR_HYBRID_SPACE;
+ else if (fhybrid && (val[0]=='=') && !(option->flags & ARGV_OPTION_HYBRID_EQUAL))
+ ferr = ARGV_ERROR_HYBRID_EQUAL;
+ else if (fhybrid && (val[0]==',') && !(option->flags & ARGV_OPTION_HYBRID_COMMA))
+ ferr = ARGV_ERROR_HYBRID_COMMA;
+ else if (!fhybrid && (val[0]==','))
+ ferr = ARGV_ERROR_HYBRID_COMMA;
+ else if (val[0] && !val[1])
+ ferr = ARGV_ERROR_OPTARG_REQUIRED;
+ else if (val[0] && val[1]) {
+ fval = true;
+ ch = ++val;
+ } else if (option->optarg == ARGV_OPTARG_REQUIRED) {
+ if (!val[0] && !*parg)
+ ferr = ARGV_ERROR_OPTARG_REQUIRED;
+ else if (*parg && is_short_option(*parg))
+ ferr = ARGV_ERROR_OPTARG_REQUIRED;
+ else if (*parg && is_long_option(*parg))
+ ferr = ARGV_ERROR_OPTARG_REQUIRED;
+ else if (*parg && is_last_option(*parg))
+ ferr = ARGV_ERROR_OPTARG_REQUIRED;
+ else
+ fval = true;
+ } else {
+ /* ARGV_OPTARG_OPTIONAL */
+ fval = val[0];
+ }
+ } else
+ ferr = ARGV_ERROR_LONG_OPTION;
+ }
+
+ if (ferr == ARGV_ERROR_OK)
+ if (option && fval && option->paradigm)
+ if (!is_arg_in_paradigm(ch,option->paradigm))
+ ferr = ARGV_ERROR_OPTARG_PARADIGM;
+
+ if (ferr == ARGV_ERROR_OK)
+ if (!option && !ctx->unitidx)
+ ctx->unitidx = parg - argv;
+
+ if (ferr != ARGV_ERROR_OK) {
+ ctx->errcode = ferr;
+ ctx->errch = ctx->errch ? ctx->errch : ch;
+ ctx->erropt = option;
+ ctx->erridx = parg - argv;
+ return;
+ } else if (ctx->mode == ARGV_MODE_SCAN) {
+ if (!fnoscan)
+ ctx->nentries++;
+ else if (fval)
+ ctx->nentries++;
+
+ if (fval || !option) {
+ parg++;
+ ch = *parg;
+ }
+ } else if (ctx->mode == ARGV_MODE_COPY) {
+ if (fnoscan) {
+ if (fval) {
+ mentry->arg = ch;
+ mentry->fnoscan = true;
+ mentry++;
+ }
+
+ parg++;
+ ch = *parg;
+ } else if (option) {
+ mentry->arg = fval ? ch : 0;
+ mentry->tag = option->tag;
+ mentry->fopt = true;
+ mentry->fval = fval;
+ mentry++;
+
+ if (fval) {
+ parg++;
+ ch = *parg;
+ }
+ } else {
+ mentry->arg = ch;
+ mentry++;
+ parg++;
+ ch = *parg;
+ }
+ }
+ }
+}
+
+static const char * argv_program_name(const char * program_path)
+{
+ const char * ch;
+
+ if (program_path) {
+ if ((ch = strrchr(program_path,'/')))
+ return *(++ch) ? ch : 0;
+
+ if ((ch = strrchr(program_path,'\\')))
+ return *(++ch) ? ch : 0;
+ }
+
+ return program_path;
+}
+
+static void argv_show_error(struct argv_ctx * ctx)
+{
+ fprintf(stderr,"%s: error: ",ctx->program);
+
+ switch (ctx->errcode) {
+ case ARGV_ERROR_SHORT_OPTION:
+ fprintf(stderr,"'-%c' is not a valid short option\n",*ctx->errch);
+ break;
+
+ case ARGV_ERROR_LONG_OPTION:
+ fprintf(stderr,"'--%s' is not a valid long option\n",ctx->errch);
+ break;
+
+ case ARGV_ERROR_OPTARG_NONE:
+ fprintf(stderr,"'%s' is not a valid option value for [%s%c%s%s%s] "
+ "(option values may not be specified)\n",
+ ctx->errch,
+ ctx->erropt->short_name ? "-" : "",
+ ctx->erropt->short_name,
+ ctx->erropt->short_name ? "," : "",
+ ctx->erropt->long_name ? "--" : "",
+ ctx->erropt->long_name);
+ break;
+
+ case ARGV_ERROR_OPTARG_REQUIRED:
+ fprintf(stderr,"option [%s%c%s%s%s] requires %s %s%s%s\n",
+ ctx->erropt->short_name ? "-" : "",
+ ctx->erropt->short_name,
+ ctx->erropt->short_name ? "," : "",
+ ctx->erropt->long_name ? "--" : "",
+ ctx->erropt->long_name,
+ ctx->erropt->paradigm ? "one of the following values:" : "a value",
+ ctx->erropt->paradigm ? "{" : "",
+ ctx->erropt->paradigm ? ctx->erropt->paradigm : "",
+ ctx->erropt->paradigm ? "}" : "");
+ break;
+
+ case ARGV_ERROR_OPTARG_PARADIGM:
+ fprintf(stderr,"'%s' is not a valid option value for [%s%c%s%s%s]={%s}\n",
+ ctx->errch,
+ ctx->erropt->short_name ? "-" : "",
+ ctx->erropt->short_name,
+ ctx->erropt->short_name ? "," : "",
+ ctx->erropt->long_name ? "--" : "",
+ ctx->erropt->long_name,
+ ctx->erropt->paradigm);
+ break;
+
+ case ARGV_ERROR_HYBRID_NONE:
+ fprintf(stderr,"-%s is not a synonym for --%s\n",
+ ctx->erropt->long_name,
+ ctx->erropt->long_name);
+ break;
+
+ case ARGV_ERROR_HYBRID_ONLY:
+ fprintf(stderr,"--%s is not a synonym for -%s\n",
+ ctx->erropt->long_name,
+ ctx->erropt->long_name);
+ break;
+
+ case ARGV_ERROR_HYBRID_SPACE:
+ case ARGV_ERROR_HYBRID_EQUAL:
+ case ARGV_ERROR_HYBRID_COMMA:
+ fprintf(stderr,"-%s: illegal value assignment; valid syntax is "
+ "-%s%sVAL\n",
+ ctx->erropt->long_name,
+ ctx->erropt->long_name,
+ (ctx->erropt->flags & ARGV_OPTION_HYBRID_SPACE)
+ ? " " : (ctx->erropt->flags & ARGV_OPTION_HYBRID_EQUAL)
+ ? "=" : (ctx->erropt->flags & ARGV_OPTION_HYBRID_COMMA)
+ ? "," : "");
+
+ break;
+
+ case ARGV_ERROR_INTERNAL:
+ fputs("internal error",stderr);
+ break;
+
+ default:
+ break;
+ }
+}
+
+static void argv_show_status(
+ const struct argv_option options[],
+ struct argv_ctx * ctx,
+ struct argv_meta * meta)
+{
+ int argc;
+ char ** argv;
+ struct argv_entry * entry;
+ const struct argv_option * option;
+ char short_name[2] = {0};
+ const char * space = "";
+
+ fputs("\n\nconcatenated command line:\n",stderr);
+ for (argv=meta->argv; *argv; argv++) {
+ fprintf(stderr,"%s%s",space,*argv);
+ space = " ";
+ }
+
+ fputs("\n\nargument vector:\n",stderr);
+ for (argc=0,argv=meta->argv; *argv; argc++,argv++)
+ fprintf(stderr,"argv[%d]: %s\n",argc,*argv);
+
+ fputs("\n\nparsed entries:\n",stderr);
+ for (entry=meta->entries; entry->arg || entry->fopt; entry++)
+ if (entry->fopt) {
+ option = option_from_tag(options,entry->tag);
+ short_name[0] = option->short_name;
+
+ if (entry->fval)
+ fprintf(stderr,"[-%s,--%s] := %s\n",
+ short_name,option->long_name,entry->arg);
+ else
+ fprintf(stderr,"[-%s,--%s]\n",
+ short_name,option->long_name);
+ } else
+ fprintf(stderr,"<program arg> := %s\n",entry->arg);
+
+ fputs("\n\n",stderr);
+}
+
+static struct argv_meta * argv_free_impl(struct argv_meta_impl * imeta)
+{
+ if (imeta->argv)
+ free(imeta->argv);
+
+ if (imeta->strbuf)
+ free(imeta->strbuf);
+
+ if (imeta->meta.entries)
+ free(imeta->meta.entries);
+
+ free(imeta);
+ return 0;
+}
+
+static struct argv_meta * argv_alloc(char ** argv, struct argv_ctx * ctx)
+{
+ struct argv_meta_impl * imeta;
+ char ** vector;
+ char * dst;
+ size_t size;
+ int argc;
+ int i;
+
+ if (!(imeta = calloc(1,sizeof(*imeta))))
+ return 0;
+
+ if (ctx->flags & ARGV_CLONE_VECTOR) {
+ for (vector=argv,argc=0,size=0; *vector; vector++) {
+ size += strlen(*vector) + 1;
+ argc++;
+ }
+
+ if (!(imeta->argv = calloc(argc+1,sizeof(char *))))
+ return argv_free_impl(imeta);
+ else if (!(imeta->strbuf = calloc(1,size+1)))
+ return argv_free_impl(imeta);
+
+ for (i=0,dst=imeta->strbuf; i<argc; i++) {
+ strcpy(dst,argv[i]);
+ imeta->argv[i] = dst;
+ dst += strlen(dst)+1;
+ }
+
+ imeta->meta.argv = imeta->argv;
+ } else
+ imeta->meta.argv = argv;
+
+ if (!(imeta->meta.entries = calloc(
+ ctx->nentries+1,
+ sizeof(struct argv_entry))))
+ return argv_free_impl(imeta);
+ else
+ return &imeta->meta;
+}
+
+static struct argv_meta * argv_get(
+ char * argv[],
+ const struct argv_option options[],
+ int flags)
+{
+ struct argv_meta * meta;
+ struct argv_ctx ctx = {flags,ARGV_MODE_SCAN,0,0,0,0,0,0,0};
+
+ argv_scan(argv,options,&ctx,0);
+
+ if (ctx.errcode != ARGV_ERROR_OK) {
+ if (!ctx.program)
+ ctx.program = argv_program_name(argv[0]);
+
+ if (ctx.flags & ARGV_VERBOSITY_ERRORS)
+ argv_show_error(&ctx);
+
+ return 0;
+ }
+
+ if (!(meta = argv_alloc(argv,&ctx)))
+ return 0;
+
+ ctx.mode = ARGV_MODE_COPY;
+ argv_scan(meta->argv,options,&ctx,meta);
+
+ if (ctx.errcode != ARGV_ERROR_OK) {
+ if (!ctx.program)
+ ctx.program = argv[0];
+
+ ctx.errcode = ARGV_ERROR_INTERNAL;
+ argv_show_error(&ctx);
+ argv_free(meta);
+
+ return 0;
+ }
+
+ if (ctx.flags & ARGV_VERBOSITY_STATUS)
+ argv_show_status(options,&ctx,meta);
+
+ return meta;
+}
+
+static void argv_free(struct argv_meta * xmeta)
+{
+ struct argv_meta_impl * imeta;
+ uintptr_t addr;
+
+ if (xmeta) {
+ addr = (uintptr_t)xmeta - offsetof(struct argv_meta_impl,meta);
+ imeta = (struct argv_meta_impl *)addr;
+ argv_free_impl(imeta);
+ }
+}
+
+static void argv_usage(
+ FILE * file,
+ const char * header,
+ const struct argv_option options[],
+ const char * mode)
+{
+ const struct argv_option * option;
+ bool fshort,flong;
+ bool fnewline;
+ size_t len,optlen;
+ size_t paralen,rparalen,mparalen;
+ size_t desclen,rdesclen;
+
+ char * para;
+ char * next_para;
+ char * desc;
+ char * next_desc;
+ char * paradigm;
+ char * buf;
+ size_t buflen;
+ const char * sdescription;
+ const char * sargname;
+
+ const char indent[] = " ";
+ const int rblen = sizeof("}") - sizeof(char);
+ const int rbblen = sizeof("{]") - sizeof(char);
+ const int brcklen= sizeof("[]") - sizeof(char);
+ const int solen = sizeof("-") - sizeof(char);
+ const int lolen = sizeof("--") - sizeof(char);
+ const int slolen = sizeof("-X,--") - sizeof(char);
+
+ fshort = mode ? !strcmp(mode,"short") : 0;
+ flong = fshort ? 0 : mode && !strcmp(mode,"long");
+
+ if (header)
+ fprintf(stdout,"%s",header);
+
+ optlen = 0;
+ paralen = 0;
+
+ for (option=options; option->short_name || option->long_name; option++) {
+ if (fshort)
+ len = option->short_name ? sizeof(char) + solen : 0;
+ else if (flong)
+ len = option->long_name ? strlen(option->long_name) + lolen : 0;
+ else
+ len = option->long_name ? strlen(option->long_name) + slolen : 0;
+
+ if (len) {
+ if (len > optlen)
+ optlen = len;
+
+ if (option->argname)
+ len = strlen(option->argname);
+ else if (option->paradigm)
+ len = strlen(option->paradigm) + strlen("{}");
+ else if (option->optarg != ARGV_OPTARG_NONE)
+ len = strlen("<val>");
+
+ if (option->optarg == ARGV_OPTARG_OPTIONAL)
+ len += strlen("[]");
+
+ if (len > paralen)
+ paralen = len;
+ }
+ }
+
+ optlen += ARGV_TAB_WIDTH;
+ optlen &= (~(ARGV_TAB_WIDTH-1));
+
+ paradigm = next_para = buf = 0;
+ fnewline = false;
+ rparalen = 0;
+ mparalen = 0;
+
+ if (paralen) {
+ paralen += (ARGV_TAB_WIDTH);
+ paralen &= (~(ARGV_TAB_WIDTH-1));
+ mparalen = paralen + 2*rbblen;
+
+ if (optlen + paralen > 64)
+ paralen = 32;
+ }
+
+ /* account for ' ','\t', try to fit in 80 or 96 columns */
+ if (optlen+paralen+2+ARGV_TAB_WIDTH < 80-32)
+ desclen = 80 - (optlen+paralen+2+ARGV_TAB_WIDTH);
+ else if (optlen+paralen+2+ARGV_TAB_WIDTH < 96-32)
+ desclen = 96 - (optlen+paralen+2+ARGV_TAB_WIDTH);
+ else
+ desclen = 32;
+
+ buflen = 0;
+ rdesclen = 1;
+
+ for (option=options; option->short_name || option->long_name; option++) {
+ if (fshort && !option->short_name)
+ continue;
+ else if (flong && !option->long_name)
+ continue;
+
+ if (option->paradigm) {
+ if (option->optarg == ARGV_OPTARG_OPTIONAL)
+ rparalen = strlen(option->paradigm) - 2*rbblen;
+ else
+ rparalen = strlen(option->paradigm) - 2*rblen;
+ }
+
+ sdescription = option->description ? option->description : "";
+ sargname = option->argname ? option->argname : "";
+
+ if (option->paradigm)
+ rdesclen = snprintf(buf,buflen,sdescription,option->paradigm);
+ else
+ rdesclen = snprintf(buf,buflen,sdescription,sargname);
+
+ if (fnewline)
+ (void)0;
+
+ if ((rparalen > paralen) || (rdesclen > desclen)) {
+ if (!fnewline) {
+ (void)0;
+ fnewline = true;
+ }
+ } else
+ fnewline = false;
+
+ if (fshort)
+ fprintf(file,"%s-%-*c",indent,(int)(optlen-solen),option->short_name);
+ else if (flong)
+ fprintf(file,
+ (option->flags & ARGV_OPTION_HYBRID_ONLY)
+ ? "%s -%-*s"
+ : "%s--%-*s",
+ indent,(int)(optlen-lolen),option->long_name);
+ else {
+ if (option->short_name && option->long_name)
+ fprintf(file,
+ (option->flags & ARGV_OPTION_HYBRID_ONLY)
+ ? "%s-%c, -%-*s"
+ : "%s-%c,--%-*s",
+ indent,option->short_name,
+ (int)(optlen-slolen),option->long_name);
+ else if (option->short_name)
+ fprintf(file,"%s-%-*c",
+ indent,(int)(optlen-solen),option->short_name);
+ else
+ fprintf(file,
+ (option->flags & ARGV_OPTION_HYBRID_ONLY)
+ ? "%s%3s -%-*s"
+ : "%s%3s--%-*s",
+ indent,"",
+ (int)(optlen-slolen),option->long_name);
+ }
+
+ if (rdesclen > buflen) {
+ if (buf) {
+ free(buf);
+ buf = 0;
+ }
+
+ len = rdesclen + 512;
+ len &= (~511);
+
+ if ((buf = calloc(1,len))) {
+ buflen = len;
+
+ if (option->paradigm)
+ rdesclen = snprintf(buf,buflen,
+ option->description,
+ option->paradigm);
+ else
+ rdesclen = snprintf(buf,buflen,
+ option->description,
+ option->argname);
+ } else {
+ buflen = 0;
+ continue;
+ }
+ }
+
+ if (option->argname) {
+ if (option->optarg == ARGV_OPTARG_OPTIONAL)
+ fprintf(file,"[%s]%-*c",
+ option->argname,
+ (int)(paralen-strlen(option->argname)-brcklen),' ');
+ else
+ fprintf(file,"%s%-*c",
+ option->argname,
+ (int)(paralen-strlen(option->argname)),' ');
+ para = (char *)0;
+ } else if (option->paradigm && (rparalen <= paralen)) {
+ if (option->optarg == ARGV_OPTARG_OPTIONAL)
+ fprintf(file,"[{%s}]%-*c",
+ option->paradigm,
+ (int)(paralen-strlen(option->paradigm)-2*rbblen),' ');
+ else
+ fprintf(file,"{%s}%-*c",
+ option->paradigm,
+ (int)(paralen-strlen(option->paradigm)-rbblen),' ');
+ para = (char *)0;
+ } else if (option->paradigm) {
+ if (!paradigm && !(paradigm = calloc(1,mparalen))) {
+ fputc('\n',file);
+ continue;
+ } else
+ para = strcpy(paradigm,option->paradigm);
+
+ if (option->optarg == ARGV_OPTARG_OPTIONAL) {
+ fputs("[{",file);
+ rparalen = paralen - rbblen;
+ } else {
+ fputc('{',file);
+ rparalen = paralen - rblen;
+ }
+ } else {
+ fprintf(file,"%-*c",(int)paralen,' ');
+ para = (char *)0;
+ }
+
+
+ if (!para && option->description && rdesclen <= desclen) {
+ fputc('\t',file);
+ fputs(buf,file);
+ desc = (char *)0;
+ } else if (option->description)
+ desc = buf;
+ else
+ desc = (char *)0;
+
+ while (para || desc) {
+ if (para) {
+ next_para = para+rparalen-1;
+
+ for (; (next_para>para) && (*next_para!='|'); )
+ next_para--;
+
+ if (para > paradigm) {
+ if (option->optarg == ARGV_OPTARG_OPTIONAL)
+ fputs(" ",file);
+ else
+ fputc(' ',file);
+ }
+
+ if (*next_para != '|') {
+ fprintf(file,"%s",para);
+ para = (char *)0;
+ } else if (next_para > para) {
+ *next_para = '\0';
+ fprintf(file,"%-*s",(int)rparalen,para);
+ *next_para = '|';
+ para = next_para;
+ rparalen = strlen(para);
+
+ /* 2*rbblen,2*rblen, etc.: account for indentation */
+ if (option->optarg == ARGV_OPTARG_OPTIONAL)
+ rparalen = (rparalen+2*rbblen > paralen)
+ ? paralen-rbblen
+ : rparalen;
+ else
+ rparalen = (rparalen+2*rblen > paralen)
+ ? paralen-rblen
+ : rparalen;
+ } else {
+ if (option->optarg == ARGV_OPTARG_OPTIONAL)
+ fprintf(file,"%s}]%-*c",para,
+ (int)(paralen-strlen(para)-rbblen),' ');
+ else
+ fprintf(file,"%s}%-*c",para,
+ (int)(paralen-strlen(para)-rblen),' ');
+ para = (char *)0;
+ }
+ } else if (desc > buf)
+ fprintf(file,"%-*c",(int)paralen,' ');
+
+ if (desc) {
+ if (desc > buf)
+ fputs("\t ",file);
+ else
+ fputc('\t',file);
+
+ if ((rdesclen = strlen(desc)+(desc>buf)) <= desclen) {
+ fputs(desc,file);
+ desc = (char *)0;
+ } else {
+ next_desc = desc + desclen - 1;
+
+ for (; (next_desc > desc)
+ && (*next_desc != ' ')
+ && (*next_desc != '\n'); )
+ next_desc--;
+
+ if ((*next_desc != ' ') && (*next_desc!='\n')) {
+ fputs(desc,file);
+ desc = (char *)0;
+ } else if (next_desc > desc) {
+ *next_desc = '\0';
+ fputs(desc,file);
+ desc = ++next_desc;
+ } else {
+ fputs(desc,file);
+ desc = (char *)0;
+ }
+ }
+ }
+
+ if (para || desc)
+ fprintf(file,"\n%s%-*c",indent,(int)optlen,' ');
+ }
+
+ fputc('\n',file);
+ }
+
+ if (paradigm)
+ free(paradigm);
+
+ if (buf)
+ free(buf);
+}
+
+#endif
+
+#endif