Changeset 3f1d9b5

Timestamp:

Jul 20, 2020, 1:20:06 PM (4 years ago)

Author:

Thierry Delisle <tdelisle@…>

Branches:

ADT, arm-eh, ast-experimental, enum, forall-pointer-decay, jacob/cs343-translation, master, new-ast, new-ast-unique-expr, pthread-emulation, qualifiedEnum

Children:

28d73c1, 7d94bfe3

Parents:

03ed863

Message:

Parse args help now properly formats on narrow terminals

File:

• benchmark/io/http/parseargs.cfa (modified) (6 diffs)

benchmark/io/http/parseargs.cfa

@@ -3 +3 @@
 // #include <stdio.h>
 // #include <stdlib.h>
+#include <errno.h>
 #include <string.h>
+#include <unistd.h>
 extern "C" {
         #include <getopt.h>
+        #include <sys/ioctl.h>
 
         struct FILE;
@@ -11 +14 @@
         extern FILE * stdout;
 
+        extern int fileno(FILE *stream);
+
         extern int fprintf ( FILE * stream, const char * format, ... );
 
         extern          long long int strtoll (const char* str, char** endptr, int base);
         extern unsigned long long int strtoull(const char* str, char** endptr, int base);
+}
+
+#include <common.hfa>
+#include <limits.hfa>
+
+void printopt(FILE * out, int width, int max, char sn, const char * ln, const char * help) {
+        int hwidth = max - (11 + width);
+        if(hwidth <= 0) hwidth = max;
+
+        fprintf(out, "  -%c, --%-*s   %.*s\n", sn, width, ln, hwidth, help);
+        for() {
+                help += min(strlen(help), hwidth);
+                if('\0' == *help) break;
+                fprintf(out, "%*s%.*s\n", width + 11, "", hwidth, help);
+        }
 }
 
@@ -27 +47 @@
         struct option optarr[opt_count + 2];
         int width = 0;
+        int max_width = 1_000_000;
         {
                 int idx = 0;
@@ -95 +116 @@
         }
 
-        USAGE:
+        USAGE:;
+        int outfd = fileno(out);
+        if(isatty(outfd)) {
+                struct winsize size;
+                int ret = ioctl(outfd, TIOCGWINSZ, &size);
+                if(ret < 0) abort( "ioctl error: (%d) %s\n", (int)errno, strerror(errno) );
+                max_width = size.ws_col;
+        }
+
         fprintf(out, "Usage:\n  %s %s\n", argv[0], usage);
 
         for(i; opt_count) {
-                fprintf(out, "  -%c, --%-*s   %s\n", options[i].short_name, width, options[i].long_name, options[i].help);
+                printopt(out, width, max_width, options[i].short_name, options[i].long_name, options[i].help);
         }
         fprintf(out, "  -%c, --%-*s   %s\n", 'h', width, "help", "print this help message");
@@ -138 +167 @@
         unsigned long long int r = strtoull(arg, &end, 10);
         if(*end != '\0') return false;
-#warning not checking max
+        if(r > (unsigned)MAX) return false;
 
         value = r;
@@ -148 +177 @@
         unsigned long long int r = strtoull(arg, &end, 10);
         if(*end != '\0') return false;
-#warning not checking max
+        if(r > (size_t)MAX) return false;
 
         value = r;