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1.1 ! noro 1: #include "dlfcn.h"
! 2:
! 3: #define INCL_BASE
! 4: #include <os2.h>
! 5: #include <float.h>
! 6:
! 7: static ULONG retcode;
! 8: static char fail[300];
! 9:
! 10: static ULONG dllHandle;
! 11: static char dllname[80];
! 12: static int handle_found;
! 13: static int handle_loaded;
! 14:
! 15: #ifdef DLOPEN_INITTERM
! 16: unsigned long _DLL_InitTerm(unsigned long modHandle, unsigned long flag)
! 17: {
! 18: switch (flag) {
! 19: case 0: /* INIT */
! 20: /* Save handle */
! 21: dllHandle = modHandle;
! 22: handle_found = 1;
! 23: return TRUE;
! 24:
! 25: case 1: /* TERM */
! 26: handle_found = 0;
! 27: dllHandle = (unsigned long)NULLHANDLE;
! 28: return TRUE;
! 29: }
! 30:
! 31: return FALSE;
! 32: }
! 33:
! 34: #endif
! 35:
! 36: void *
! 37: dlopen(char *path, int mode)
! 38: {
! 39: HMODULE handle;
! 40: char tmp[260], *beg, *dot;
! 41: ULONG rc;
! 42: unsigned fpflag = _control87(0,0);
! 43:
! 44: fail[0] = 0;
! 45: if (!path) { /* Our own handle. */
! 46: if (handle_found) {
! 47: if (handle_loaded)
! 48: return (void*)dllHandle;
! 49: rc = DosQueryModuleName(dllHandle, sizeof(dllname), dllname);
! 50: if (rc) {
! 51: strcpy(fail, "can't find my DLL name by the handle");
! 52: return 0;
! 53: }
! 54: rc = DosLoadModule(fail, sizeof fail, dllname, &handle);
! 55: if (rc) {
! 56: strcpy(fail, "can't load my own DLL");
! 57: return 0;
! 58: }
! 59: handle_loaded = 1;
! 60: goto ret;
! 61: }
! 62: strcpy(fail, "can't load from myself: compiled without -DDLOPEN_INITTERM");
! 63: return 0;
! 64: }
! 65: if ((rc = DosLoadModule(fail, sizeof fail, path, &handle)) == 0)
! 66: goto ret;
! 67:
! 68: retcode = rc;
! 69:
! 70: /* Not found. Check for non-FAT name and try truncated name. */
! 71: /* Don't know if this helps though... */
! 72: for (beg = dot = path + strlen(path);
! 73: beg > path && !strchr(":/\\", *(beg-1));
! 74: beg--)
! 75: if (*beg == '.')
! 76: dot = beg;
! 77: if (dot - beg > 8) {
! 78: int n = beg+8-path;
! 79: memmove(tmp, path, n);
! 80: memmove(tmp+n, dot, strlen(dot)+1);
! 81: if (DosLoadModule(fail, sizeof fail, tmp, &handle) == 0)
! 82: goto ret;
! 83: }
! 84: handle = 0;
! 85:
! 86: ret:
! 87: _control87(fpflag, MCW_EM); /* Some modules reset FP flags on load */
! 88: return (void *)handle;
! 89: }
! 90:
! 91: void *
! 92: dlsym(void *handle, char *symbol)
! 93: {
! 94: ULONG rc, type;
! 95: PFN addr;
! 96:
! 97: fail[0] = 0;
! 98: rc = DosQueryProcAddr((HMODULE)handle, 0, symbol, &addr);
! 99: if (rc == 0) {
! 100: rc = DosQueryProcType((HMODULE)handle, 0, symbol, &type);
! 101: if (rc == 0 && type == PT_32BIT)
! 102: return (void *)addr;
! 103: rc = ERROR_CALL_NOT_IMPLEMENTED;
! 104: }
! 105: retcode = rc;
! 106: return NULL;
! 107: }
! 108:
! 109: char *
! 110: dlerror(void)
! 111: {
! 112: static char buf[700];
! 113: ULONG len;
! 114:
! 115: if (retcode == 0)
! 116: return NULL;
! 117: if (DosGetMessage(NULL, 0, buf, sizeof buf - 1, retcode,
! 118: "OSO001.MSG", &len)) {
! 119: if (fail[0])
! 120: sprintf(buf,
! 121: "OS/2 system error code %d, possible problematic module: '%s'",
! 122: (int)retcode, fail);
! 123: else
! 124: sprintf(buf, "OS/2 system error code %d", (int)retcode);
! 125: } else {
! 126: buf[len] = '\0';
! 127: if (len && buf[len - 1] == '\n')
! 128: buf[--len] = 0;
! 129: if (len && buf[len - 1] == '\r')
! 130: buf[--len] = 0;
! 131: if (len && buf[len - 1] == '.')
! 132: buf[--len] = 0;
! 133: if (fail[0] && len < 300)
! 134: sprintf(buf + len, ", possible problematic module: '%s'",
! 135: fail);
! 136: }
! 137: retcode = 0;
! 138: return buf;
! 139: }
! 140:
! 141: int
! 142: dlclose(void *handle)
! 143: {
! 144: ULONG rc;
! 145:
! 146: if ((rc = DosFreeModule((HMODULE)handle)) == 0) return 0;
! 147:
! 148: retcode = rc;
! 149: return 2;
! 150: }