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| 2 | /***********************************************************************
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| 3 |
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| 4 | $Id: commafmt.c 551 2007-02-28 01:33:51Z gyoung $
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| 5 |
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| 6 | Command formatting tools
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| 7 |
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| 8 | Copyright (c) 1993-98 M. Kimes
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| 9 | Copyright (c) 2004, 2005 Steven H. Levine
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| 10 |
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| 11 | 06 Jan 04 SHL Disable hundfmt, clean commafmt
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| 12 | 25 May 05 SHL Drop hundfmt
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| 13 | 25 May 05 SHL Add CommaFmtULL, CommaFmtUL
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| 14 |
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| 15 | ***********************************************************************/
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| 16 |
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| 17 | /*
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| 18 | ** COMMAFMT.C
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| 19 | ** Public domain by Bob Stout
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| 20 | **
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| 21 | ** Notes: 1. Use static buffer to eliminate error checks on buffer overflow
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| 22 | ** and reduce code size.
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| 23 | ** 2. By making the numeric argument a long and prototyping it before
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| 24 | ** use, passed numeric arguments will be implicitly cast to longs
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| 25 | ** thereby avoiding int overflow.
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| 26 | ** 3. Use the thousands grouping and thousands separator from the
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| 27 | ** ANSI locale to make this more robust.
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| 28 | */
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| 29 |
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| 30 | #pragma alloc_text(MISC8,commafmt,CommaFmtU64)
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| 31 |
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| 32 | #define INCL_LONGLONG
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| 33 | #include <os2.h>
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| 34 |
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| 35 | #include <stdlib.h>
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| 36 | #include <stdio.h>
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| 37 | #include <string.h>
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| 38 |
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| 39 | size_t commafmt(char *pszBuf, // Output buffer
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| 40 | UINT cBufSize, // Buffer size, including nul
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| 41 | long lNumber) // Number to convert
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| 42 | {
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| 43 | UINT cChars = 1; // Number of characters generated (excluding nul)
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| 44 | UINT cDigits = 1; // For commas
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| 45 | INT sign = 1;
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| 46 |
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| 47 | char *pch = pszBuf + cBufSize - 1;
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| 48 |
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| 49 | if (cBufSize < 2)
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| 50 | goto ABORT;
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| 51 |
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| 52 | *pch-- = 0; // Stuff terminator
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| 53 | --cBufSize;
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| 54 | if (lNumber < 0) {
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| 55 | sign = -1;
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| 56 | lNumber = -lNumber;
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| 57 | }
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| 58 |
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| 59 | for (; cChars <= cBufSize; ++cChars, ++cDigits) {
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| 60 | *pch-- = (CHAR) (lNumber % 10 + '0');
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| 61 | lNumber /= 10;
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| 62 | if (!lNumber)
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| 63 | break;
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| 64 | if (cDigits % 3 == 0) {
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| 65 | *pch-- = ',';
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| 66 | ++cChars;
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| 67 | }
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| 68 | if (cChars >= cBufSize)
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| 69 | goto ABORT;
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| 70 | } // for
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| 71 |
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| 72 | if (sign < 0) {
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| 73 | if (cBufSize == 0)
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| 74 | goto ABORT;
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| 75 | *pch-- = '-';
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| 76 | ++cChars;
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| 77 | }
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| 78 |
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| 79 | strcpy(pszBuf, ++pch); // Left align
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| 80 |
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| 81 | return cChars;
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| 82 |
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| 83 | ABORT:
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| 84 | *pszBuf = 0;
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| 85 | return 0;
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| 86 | }
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| 87 |
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| 88 | //=== CommaFmtULL: format long long number with commas and SI unit suffix ===
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| 89 |
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| 90 | size_t CommaFmtULL(char *pszBuf, // Output buffer
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| 91 | UINT cBufSize, // Buffer size, including nul
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| 92 | ULONGLONG ullNumber, // Number to convert
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| 93 | CHAR chPreferred) // Preferred suffix, blank, K, M
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| 94 | {
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| 95 | CHAR chSuffix = ' ';
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| 96 | size_t c;
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| 97 |
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| 98 | if (ullNumber >= 1ULL << 31 || (chPreferred != ' ' && ullNumber >= 1024)) {
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| 99 | ullNumber = (ullNumber + 1023) >> 10;
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| 100 | chSuffix = 'K';
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| 101 | if (ullNumber >= 1ULL << 31 || (chPreferred == 'M' && ullNumber >= 1024)) {
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| 102 | ullNumber = (ullNumber + 1023) >> 10;
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| 103 | chSuffix = 'M';
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| 104 | }
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| 105 | }
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| 106 |
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| 107 | c = commafmt(pszBuf, cBufSize, (LONG) ullNumber);
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| 108 |
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| 109 | if (chSuffix != ' ') {
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| 110 | if (c + 4 > cBufSize) {
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| 111 | *pszBuf = 0;
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| 112 | c = 0;
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| 113 | }
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| 114 | else {
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| 115 | pszBuf += c;
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| 116 | *pszBuf++ = chSuffix;
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| 117 | *pszBuf++ = 'i';
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| 118 | *pszBuf++ = 'B';
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| 119 | c += 3;
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| 120 | *pszBuf = 0;
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| 121 | }
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| 122 | }
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| 123 | return c;
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| 124 | }
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| 125 |
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| 126 | //=== CommaFmtUL: format unsigned long number with commas and SI unit suffix ===
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| 127 |
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| 128 | size_t CommaFmtUL(char *pszBuf, // Output buffer
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| 129 | UINT cBufSize, // Buffer size, including nul
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| 130 | ULONG ulNumber, // Number to convert
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| 131 | CHAR chPreferred) // Preferred suffix, blank, K, M
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| 132 | {
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| 133 | CHAR chSuffix = ' ';
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| 134 | size_t c;
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| 135 |
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| 136 | if (ulNumber >= 1ULL << 31 || (chPreferred != ' ' && ulNumber >= 1024)) {
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| 137 | ulNumber = (ulNumber + 1023) >> 10;
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| 138 | chSuffix = 'K';
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| 139 | if (ulNumber >= 1ULL << 31 || (chPreferred == 'M' && ulNumber >= 1024)) {
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| 140 | ulNumber = (ulNumber + 1023) >> 10;
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| 141 | chSuffix = 'M';
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| 142 | }
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| 143 | }
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| 144 |
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| 145 | c = commafmt(pszBuf, cBufSize, ulNumber);
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| 146 |
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| 147 | if (chSuffix != ' ') {
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| 148 | if (c + 4 > cBufSize) {
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| 149 | *pszBuf = 0;
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| 150 | c = 0;
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| 151 | }
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| 152 | else {
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| 153 | pszBuf += c;
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| 154 | *pszBuf++ = chSuffix;
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| 155 | *pszBuf++ = 'i';
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| 156 | *pszBuf++ = 'B';
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| 157 | c += 3;
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| 158 | *pszBuf = 0;
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| 159 | }
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| 160 | }
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| 161 | return c;
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| 162 | }
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