comparison: src/format.cc
src/format.cc
- changeset 72
- 03e4d9db3fd9
- child 73
- 1ee9b312dc18
equal
deleted
inserted
replaced
| 71:11f23fabf8a6 | 72:03e4d9db3fd9 |
|---|---|
| 1 #include <cstdio> | |
| 2 #include "main.h" | |
| 3 #include "format.h" | |
| 4 | |
| 5 static void draw_pos (const string& fmt, int pos) | |
| 6 { | |
| 7 string rep (fmt); | |
| 8 rep.replace ("\n", "↵"); | |
| 9 rep.replace ("\t", "⇥"); | |
| 10 | |
| 11 fprintf (stderr, "%s\n", rep.chars()); | |
| 12 | |
| 13 for (int x = 0; x < pos; ++x) | |
| 14 fprintf (stderr, "-"); | |
| 15 | |
| 16 fprintf (stderr, "^\n"); | |
| 17 } | |
| 18 | |
| 19 string format_args (const list<format_arg>& args) | |
| 20 { | |
| 21 const string& fmtstr = args[0].as_string(); | |
| 22 assert (args.size() >= 1); | |
| 23 | |
| 24 if (args.size() == 1) | |
| 25 return args[0].as_string(); | |
| 26 | |
| 27 string fmt = fmtstr; | |
| 28 string out; | |
| 29 int pos = 0; | |
| 30 | |
| 31 while ((pos = fmt.first ("%", pos)) != -1) | |
| 32 { | |
| 33 if (fmt[pos + 1] == '%') | |
| 34 { | |
| 35 fmt.replace (pos, 2, "%"); | |
| 36 pos++; | |
| 37 continue; | |
| 38 } | |
| 39 | |
| 40 int ofs = 1; | |
| 41 char mod = '\0'; | |
| 42 | |
| 43 // handle modifiers | |
| 44 if (fmt[ pos + ofs ] == 's' || fmt[ pos + ofs ] == 'x') | |
| 45 { | |
| 46 mod = fmt[ pos + ofs ]; | |
| 47 ofs++; | |
| 48 } | |
| 49 | |
| 50 if (!isdigit (fmt[ pos + ofs ])) | |
| 51 { | |
| 52 fprintf (stderr, "bad format string, expected digit with optional " | |
| 53 "modifier after '%%':\n"); | |
| 54 draw_pos (fmt, pos); | |
| 55 return fmt; | |
| 56 } | |
| 57 | |
| 58 int i = fmt[ pos + ofs ] - '0'; | |
| 59 | |
| 60 if (i >= args.size()) | |
| 61 { | |
| 62 fprintf (stderr, "format arg #%d used but not defined: %s\n", i, fmtstr.chars()); | |
| 63 return fmt; | |
| 64 } | |
| 65 | |
| 66 string repl = args[i].as_string(); | |
| 67 | |
| 68 if (mod == 's') | |
| 69 { | |
| 70 repl = (repl == "1") ? "" : "s"; | |
| 71 } | |
| 72 | |
| 73 elif (mod == 'd') | |
| 74 { | |
| 75 repl.sprintf ("%d", repl[0]); | |
| 76 } | |
| 77 elif (mod == 'x') | |
| 78 { | |
| 79 // modifier x: reinterpret the argument as hex | |
| 80 repl.sprintf ("0x%X", strtol (repl.chars(), null, 10)); | |
| 81 } | |
| 82 | |
| 83 fmt.replace (pos, 1 + ofs, repl); | |
| 84 pos += repl.length(); | |
| 85 } | |
| 86 | |
| 87 return fmt; | |
| 88 } | |
| 89 | |
| 90 void print_args (FILE* fp, const list<format_arg>& args) | |
| 91 { | |
| 92 string out = format_args (args); | |
| 93 fprintf (fp, "%s", out.chars()); | |
| 94 } |
