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| 2 | /***********************************************************************
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| 3 |
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| 4 | $Id: strutil.c 907 2008-01-06 07:26:17Z stevenhl $
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| 5 |
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| 6 | External strings file support
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| 7 |
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| 8 | Copyright (c) 1993-98 M. Kimes
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| 9 | Copyright (c) 2006, 2008 Steven H. Levine
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| 10 |
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| 11 | 22 Jul 06 SHL Comments
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| 12 | 20 Aug 07 GKY Move #pragma alloc_text to end for OpenWatcom compat
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| 13 | 05 Jan 08 SHL Rename from string.c to avoid string.h conflict
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| 14 |
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| 15 | ***********************************************************************/
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| 16 |
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| 17 | #include <stdio.h>
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| 18 | #include <share.h>
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| 19 |
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| 20 | #include "strutil.h"
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| 21 | #include "fm3str.h"
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| 22 | #include "version.h"
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| 23 |
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| 24 | extern PSZ NullStr; // 05 Jan 08 SHL fixme to be in some .h
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| 25 |
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| 26 | static char **strs, *str;
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| 27 | static ULONG numStr;
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| 28 |
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| 29 | //== LoadStrings() load strings from file ==
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| 30 |
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| 31 | BOOL LoadStrings(char *filename)
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| 32 | {
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| 33 | BOOL ok = FALSE;
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| 34 | ULONG size, len, totalsize;
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| 35 | USHORT vermajor = 0, verminor = 0;
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| 36 | register char *p;
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| 37 | register ULONG x;
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| 38 | FILE *fp;
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| 39 | APIRET rc;
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| 40 |
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| 41 | /* Load strings from requested file or FM3RES.STR
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| 42 | * with some quiet error-checking.
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| 43 | * Return TRUE on success, FALSE on error.
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| 44 | */
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| 45 |
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| 46 | if (!filename)
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| 47 | filename = "FM3RES.STR";
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| 48 | numStr = 0;
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| 49 | if (str)
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| 50 | DosFreeMem(str);
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| 51 | strs = NULL;
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| 52 | str = NULL;
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| 53 |
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| 54 | fp = _fsopen(filename, "rb", SH_DENYWR);
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| 55 | if (fp) {
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| 56 | if (fread(&numStr,
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| 57 | sizeof(numStr),
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| 58 | 1,
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| 59 | fp) &&
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| 60 | numStr == IDS_NUMSTRS &&
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| 61 | fread(&len, sizeof(len), 1, fp) &&
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| 62 | fread(&vermajor, sizeof(vermajor), 1, fp) &&
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| 63 | fread(&verminor, sizeof(verminor), 1, fp) &&
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| 64 | (vermajor >= VERMAJORBREAK &&
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| 65 | (vermajor > VERMAJORBREAK || verminor >= VERMINORBREAK))) {
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| 66 | fseek(fp, 0, SEEK_END);
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| 67 | size = ftell(fp) - ((sizeof(ULONG) * 2) + (sizeof(USHORT) * 2));
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| 68 | if (size && size == len) {
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| 69 | fseek(fp, (sizeof(ULONG) * 2) + (sizeof(USHORT) * 2), SEEK_SET);
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| 70 | /* NOTE: Make one memory object for both str and strs
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| 71 | * for efficiency.
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| 72 | */
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| 73 | totalsize = size + sizeof(ULONG);
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| 74 | totalsize += (totalsize % sizeof(ULONG));
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| 75 | len = totalsize;
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| 76 | totalsize += (numStr * sizeof(char *));
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| 77 | totalsize += 4;
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| 78 | rc = DosAllocMem((PPVOID) & str, totalsize,
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| 79 | PAG_COMMIT | PAG_READ | PAG_WRITE);
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| 80 | if (!rc && str) {
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| 81 | strs = (char **)(str + len);
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| 82 | if (fread(str, 1, size, fp) == size) {
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| 83 | p = str;
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| 84 | for (x = 0; x < numStr; x++) {
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| 85 | if (p - str >= size)
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| 86 | break;
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| 87 | strs[x] = p;
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| 88 | while (*p)
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| 89 | p++;
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| 90 | p++;
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| 91 | }
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| 92 | if (x == numStr)
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| 93 | ok = TRUE;
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| 94 | }
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| 95 | if (ok)
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| 96 | /* set pages to readonly */
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| 97 | DosSetMem(str, totalsize, PAG_COMMIT | PAG_READ);
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| 98 | }
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| 99 | }
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| 100 | }
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| 101 | fclose(fp);
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| 102 | }
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| 103 |
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| 104 | if (!ok) {
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| 105 | numStr = 0;
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| 106 | if (str)
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| 107 | DosFreeMem(str);
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| 108 | str = NULL;
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| 109 | strs = NULL;
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| 110 | }
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| 111 |
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| 112 | return ok;
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| 113 | }
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| 114 |
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| 115 | //== GetPString() return a readonly pointer to the requested string in memory ==
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| 116 |
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| 117 | char *GetPString(ULONG id)
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| 118 | {
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| 119 | return id < numStr && str && strs && strs[id] ? strs[id] : NullStr;
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| 120 | }
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| 121 |
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| 122 | //== StringsLoaded() return TRUE is strings loaded
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| 123 |
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| 124 | BOOL StringsLoaded(void)
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| 125 | {
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| 126 | return numStr && str && strs;
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| 127 | }
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| 128 |
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| 129 | #pragma alloc_text(STRINGS,LoadStrings,GetPString)
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