diff options
Diffstat (limited to 'contrib/tcl/generic/tclCmdMZ.c')
| -rw-r--r-- | contrib/tcl/generic/tclCmdMZ.c | 2107 |
1 files changed, 2107 insertions, 0 deletions
diff --git a/contrib/tcl/generic/tclCmdMZ.c b/contrib/tcl/generic/tclCmdMZ.c new file mode 100644 index 0000000..faf9eed --- /dev/null +++ b/contrib/tcl/generic/tclCmdMZ.c @@ -0,0 +1,2107 @@ +/* + * tclCmdMZ.c -- + * + * This file contains the top-level command routines for most of + * the Tcl built-in commands whose names begin with the letters + * M to Z. It contains only commands in the generic core (i.e. + * those that don't depend much upon UNIX facilities). + * + * Copyright (c) 1987-1993 The Regents of the University of California. + * Copyright (c) 1994-1996 Sun Microsystems, Inc. + * + * See the file "license.terms" for information on usage and redistribution + * of this file, and for a DISCLAIMER OF ALL WARRANTIES. + * + * SCCS: @(#) tclCmdMZ.c 1.65 96/02/09 14:59:52 + */ + +#include "tclInt.h" +#include "tclPort.h" + +/* + * Structure used to hold information about variable traces: + */ + +typedef struct { + int flags; /* Operations for which Tcl command is + * to be invoked. */ + char *errMsg; /* Error message returned from Tcl command, + * or NULL. Malloc'ed. */ + int length; /* Number of non-NULL chars. in command. */ + char command[4]; /* Space for Tcl command to invoke. Actual + * size will be as large as necessary to + * hold command. This field must be the + * last in the structure, so that it can + * be larger than 4 bytes. */ +} TraceVarInfo; + +/* + * Forward declarations for procedures defined in this file: + */ + +static char * TraceVarProc _ANSI_ARGS_((ClientData clientData, + Tcl_Interp *interp, char *name1, char *name2, + int flags)); + +/* + *---------------------------------------------------------------------- + * + * Tcl_PwdCmd -- + * + * This procedure is invoked to process the "pwd" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_PwdCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + char *dirName; + + if (argc != 1) { + Tcl_AppendResult(interp, "wrong # args: should be \"", + argv[0], "\"", (char *) NULL); + return TCL_ERROR; + } + + dirName = TclGetCwd(interp); + if (dirName == NULL) { + return TCL_ERROR; + } + interp->result = dirName; + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_RegexpCmd -- + * + * This procedure is invoked to process the "regexp" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_RegexpCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + int noCase = 0; + int indices = 0; + Tcl_RegExp regExpr; + char **argPtr, *string, *pattern, *start, *end; + int match = 0; /* Initialization needed only to + * prevent compiler warning. */ + int i; + Tcl_DString stringDString, patternDString; + + if (argc < 3) { + wrongNumArgs: + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " ?switches? exp string ?matchVar? ?subMatchVar ", + "subMatchVar ...?\"", (char *) NULL); + return TCL_ERROR; + } + argPtr = argv+1; + argc--; + while ((argc > 0) && (argPtr[0][0] == '-')) { + if (strcmp(argPtr[0], "-indices") == 0) { + indices = 1; + } else if (strcmp(argPtr[0], "-nocase") == 0) { + noCase = 1; + } else if (strcmp(argPtr[0], "--") == 0) { + argPtr++; + argc--; + break; + } else { + Tcl_AppendResult(interp, "bad switch \"", argPtr[0], + "\": must be -indices, -nocase, or --", (char *) NULL); + return TCL_ERROR; + } + argPtr++; + argc--; + } + if (argc < 2) { + goto wrongNumArgs; + } + + /* + * Convert the string and pattern to lower case, if desired, and + * perform the matching operation. + */ + + if (noCase) { + register char *p; + + Tcl_DStringInit(&patternDString); + Tcl_DStringAppend(&patternDString, argPtr[0], -1); + pattern = Tcl_DStringValue(&patternDString); + for (p = pattern; *p != 0; p++) { + if (isupper(UCHAR(*p))) { + *p = (char)tolower(UCHAR(*p)); + } + } + Tcl_DStringInit(&stringDString); + Tcl_DStringAppend(&stringDString, argPtr[1], -1); + string = Tcl_DStringValue(&stringDString); + for (p = string; *p != 0; p++) { + if (isupper(UCHAR(*p))) { + *p = (char)tolower(UCHAR(*p)); + } + } + } else { + pattern = argPtr[0]; + string = argPtr[1]; + } + regExpr = Tcl_RegExpCompile(interp, pattern); + if (regExpr != NULL) { + match = Tcl_RegExpExec(interp, regExpr, string, string); + } + if (noCase) { + Tcl_DStringFree(&stringDString); + Tcl_DStringFree(&patternDString); + } + if (regExpr == NULL) { + return TCL_ERROR; + } + if (match < 0) { + return TCL_ERROR; + } + if (!match) { + interp->result = "0"; + return TCL_OK; + } + + /* + * If additional variable names have been specified, return + * index information in those variables. + */ + + argc -= 2; + for (i = 0; i < argc; i++) { + char *result, info[50]; + + Tcl_RegExpRange(regExpr, i, &start, &end); + if (start == NULL) { + if (indices) { + result = Tcl_SetVar(interp, argPtr[i+2], "-1 -1", 0); + } else { + result = Tcl_SetVar(interp, argPtr[i+2], "", 0); + } + } else { + if (indices) { + sprintf(info, "%d %d", (int)(start - string), + (int)(end - string - 1)); + result = Tcl_SetVar(interp, argPtr[i+2], info, 0); + } else { + char savedChar, *first, *last; + + first = argPtr[1] + (start - string); + last = argPtr[1] + (end - string); + savedChar = *last; + *last = 0; + result = Tcl_SetVar(interp, argPtr[i+2], first, 0); + *last = savedChar; + } + } + if (result == NULL) { + Tcl_AppendResult(interp, "couldn't set variable \"", + argPtr[i+2], "\"", (char *) NULL); + return TCL_ERROR; + } + } + interp->result = "1"; + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_RegsubCmd -- + * + * This procedure is invoked to process the "regsub" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_RegsubCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + int noCase = 0, all = 0; + Tcl_RegExp regExpr; + char *string, *pattern, *p, *firstChar, *newValue, **argPtr; + int match, flags, code, numMatches; + char *start, *end, *subStart, *subEnd; + register char *src, c; + Tcl_DString stringDString, patternDString; + + if (argc < 5) { + wrongNumArgs: + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " ?switches? exp string subSpec varName\"", (char *) NULL); + return TCL_ERROR; + } + argPtr = argv+1; + argc--; + while (argPtr[0][0] == '-') { + if (strcmp(argPtr[0], "-nocase") == 0) { + noCase = 1; + } else if (strcmp(argPtr[0], "-all") == 0) { + all = 1; + } else if (strcmp(argPtr[0], "--") == 0) { + argPtr++; + argc--; + break; + } else { + Tcl_AppendResult(interp, "bad switch \"", argPtr[0], + "\": must be -all, -nocase, or --", (char *) NULL); + return TCL_ERROR; + } + argPtr++; + argc--; + } + if (argc != 4) { + goto wrongNumArgs; + } + + /* + * Convert the string and pattern to lower case, if desired. + */ + + if (noCase) { + Tcl_DStringInit(&patternDString); + Tcl_DStringAppend(&patternDString, argPtr[0], -1); + pattern = Tcl_DStringValue(&patternDString); + for (p = pattern; *p != 0; p++) { + if (isupper(UCHAR(*p))) { + *p = (char)tolower(UCHAR(*p)); + } + } + Tcl_DStringInit(&stringDString); + Tcl_DStringAppend(&stringDString, argPtr[1], -1); + string = Tcl_DStringValue(&stringDString); + for (p = string; *p != 0; p++) { + if (isupper(UCHAR(*p))) { + *p = (char)tolower(UCHAR(*p)); + } + } + } else { + pattern = argPtr[0]; + string = argPtr[1]; + } + regExpr = Tcl_RegExpCompile(interp, pattern); + if (regExpr == NULL) { + code = TCL_ERROR; + goto done; + } + + /* + * The following loop is to handle multiple matches within the + * same source string; each iteration handles one match and its + * corresponding substitution. If "-all" hasn't been specified + * then the loop body only gets executed once. + */ + + flags = 0; + numMatches = 0; + for (p = string; *p != 0; ) { + match = Tcl_RegExpExec(interp, regExpr, p, string); + if (match < 0) { + code = TCL_ERROR; + goto done; + } + if (!match) { + break; + } + numMatches += 1; + + /* + * Copy the portion of the source string before the match to the + * result variable. + */ + + Tcl_RegExpRange(regExpr, 0, &start, &end); + src = argPtr[1] + (start - string); + c = *src; + *src = 0; + newValue = Tcl_SetVar(interp, argPtr[3], argPtr[1] + (p - string), + flags); + *src = c; + flags = TCL_APPEND_VALUE; + if (newValue == NULL) { + cantSet: + Tcl_AppendResult(interp, "couldn't set variable \"", + argPtr[3], "\"", (char *) NULL); + code = TCL_ERROR; + goto done; + } + + /* + * Append the subSpec argument to the variable, making appropriate + * substitutions. This code is a bit hairy because of the backslash + * conventions and because the code saves up ranges of characters in + * subSpec to reduce the number of calls to Tcl_SetVar. + */ + + for (src = firstChar = argPtr[2], c = *src; c != 0; src++, c = *src) { + int index; + + if (c == '&') { + index = 0; + } else if (c == '\\') { + c = src[1]; + if ((c >= '0') && (c <= '9')) { + index = c - '0'; + } else if ((c == '\\') || (c == '&')) { + *src = c; + src[1] = 0; + newValue = Tcl_SetVar(interp, argPtr[3], firstChar, + TCL_APPEND_VALUE); + *src = '\\'; + src[1] = c; + if (newValue == NULL) { + goto cantSet; + } + firstChar = src+2; + src++; + continue; + } else { + continue; + } + } else { + continue; + } + if (firstChar != src) { + c = *src; + *src = 0; + newValue = Tcl_SetVar(interp, argPtr[3], firstChar, + TCL_APPEND_VALUE); + *src = c; + if (newValue == NULL) { + goto cantSet; + } + } + Tcl_RegExpRange(regExpr, index, &subStart, &subEnd); + if ((subStart != NULL) && (subEnd != NULL)) { + char *first, *last, saved; + + first = argPtr[1] + (subStart - string); + last = argPtr[1] + (subEnd - string); + saved = *last; + *last = 0; + newValue = Tcl_SetVar(interp, argPtr[3], first, + TCL_APPEND_VALUE); + *last = saved; + if (newValue == NULL) { + goto cantSet; + } + } + if (*src == '\\') { + src++; + } + firstChar = src+1; + } + if (firstChar != src) { + if (Tcl_SetVar(interp, argPtr[3], firstChar, + TCL_APPEND_VALUE) == NULL) { + goto cantSet; + } + } + if (end == p) { + char tmp[2]; + + /* + * Always consume at least one character of the input string + * in order to prevent infinite loops. + */ + + tmp[0] = argPtr[1][p - string]; + tmp[1] = 0; + newValue = Tcl_SetVar(interp, argPtr[3], tmp, flags); + if (newValue == NULL) { + goto cantSet; + } + p = end + 1; + } else { + p = end; + } + if (!all) { + break; + } + } + + /* + * Copy the portion of the source string after the last match to the + * result variable. + */ + + if ((*p != 0) || (numMatches == 0)) { + if (Tcl_SetVar(interp, argPtr[3], argPtr[1] + (p - string), + flags) == NULL) { + goto cantSet; + } + } + sprintf(interp->result, "%d", numMatches); + code = TCL_OK; + + done: + if (noCase) { + Tcl_DStringFree(&stringDString); + Tcl_DStringFree(&patternDString); + } + return code; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_RenameCmd -- + * + * This procedure is invoked to process the "rename" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_RenameCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + register Command *cmdPtr; + Interp *iPtr = (Interp *) interp; + Tcl_HashEntry *hPtr; + int new; + char *srcName, *dstName; + + if (argc != 3) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " oldName newName\"", (char *) NULL); + return TCL_ERROR; + } + if (argv[2][0] == '\0') { + if (Tcl_DeleteCommand(interp, argv[1]) != 0) { + Tcl_AppendResult(interp, "can't delete \"", argv[1], + "\": command doesn't exist", (char *) NULL); + return TCL_ERROR; + } + return TCL_OK; + } + + srcName = argv[1]; + dstName = argv[2]; + hPtr = Tcl_FindHashEntry(&iPtr->commandTable, dstName); + if (hPtr != NULL) { + Tcl_AppendResult(interp, "can't rename to \"", argv[2], + "\": command already exists", (char *) NULL); + return TCL_ERROR; + } + + /* + * The code below was added in 11/95 to preserve backwards compatibility + * when "tkerror" was renamed "bgerror": we guarantee that the hash + * table entries for both commands refer to a single shared Command + * structure. This code should eventually become unnecessary. + */ + + if ((srcName[0] == 't') && (strcmp(srcName, "tkerror") == 0)) { + srcName = "bgerror"; + } + dstName = argv[2]; + if ((dstName[0] == 't') && (strcmp(dstName, "tkerror") == 0)) { + dstName = "bgerror"; + } + + hPtr = Tcl_FindHashEntry(&iPtr->commandTable, srcName); + if (hPtr == NULL) { + Tcl_AppendResult(interp, "can't rename \"", argv[1], + "\": command doesn't exist", (char *) NULL); + return TCL_ERROR; + } + cmdPtr = (Command *) Tcl_GetHashValue(hPtr); + + /* + * Prevent formation of alias loops through renaming. + */ + + if (TclPreventAliasLoop(interp, interp, dstName, cmdPtr->proc, + cmdPtr->clientData) != TCL_OK) { + return TCL_ERROR; + } + + Tcl_DeleteHashEntry(hPtr); + hPtr = Tcl_CreateHashEntry(&iPtr->commandTable, dstName, &new); + Tcl_SetHashValue(hPtr, cmdPtr); + cmdPtr->hPtr = hPtr; + + /* + * The code below provides more backwards compatibility for the + * "tkerror" => "bgerror" renaming. As with the other compatibility + * code above, it should eventually be removed. + */ + + if ((dstName[0] == 'b') && (strcmp(dstName, "bgerror") == 0)) { + /* + * The destination command is "bgerror"; create a "tkerror" + * command that shares the same Command structure. + */ + + hPtr = Tcl_CreateHashEntry(&iPtr->commandTable, "tkerror", &new); + Tcl_SetHashValue(hPtr, cmdPtr); + } + if ((srcName[0] == 'b') && (strcmp(srcName, "bgerror") == 0)) { + /* + * The source command is "bgerror": delete the hash table + * entry for "tkerror" if it exists. + */ + + Tcl_DeleteHashEntry(Tcl_FindHashEntry(&iPtr->commandTable, "tkerror")); + } + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_ReturnCmd -- + * + * This procedure is invoked to process the "return" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_ReturnCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + Interp *iPtr = (Interp *) interp; + int c, code; + + if (iPtr->errorInfo != NULL) { + ckfree(iPtr->errorInfo); + iPtr->errorInfo = NULL; + } + if (iPtr->errorCode != NULL) { + ckfree(iPtr->errorCode); + iPtr->errorCode = NULL; + } + code = TCL_OK; + for (argv++, argc--; argc > 1; argv += 2, argc -= 2) { + if (strcmp(argv[0], "-code") == 0) { + c = argv[1][0]; + if ((c == 'o') && (strcmp(argv[1], "ok") == 0)) { + code = TCL_OK; + } else if ((c == 'e') && (strcmp(argv[1], "error") == 0)) { + code = TCL_ERROR; + } else if ((c == 'r') && (strcmp(argv[1], "return") == 0)) { + code = TCL_RETURN; + } else if ((c == 'b') && (strcmp(argv[1], "break") == 0)) { + code = TCL_BREAK; + } else if ((c == 'c') && (strcmp(argv[1], "continue") == 0)) { + code = TCL_CONTINUE; + } else if (Tcl_GetInt(interp, argv[1], &code) != TCL_OK) { + Tcl_ResetResult(interp); + Tcl_AppendResult(interp, "bad completion code \"", + argv[1], "\": must be ok, error, return, break, ", + "continue, or an integer", (char *) NULL); + return TCL_ERROR; + } + } else if (strcmp(argv[0], "-errorinfo") == 0) { + iPtr->errorInfo = (char *) ckalloc((unsigned) (strlen(argv[1]) + 1)); + strcpy(iPtr->errorInfo, argv[1]); + } else if (strcmp(argv[0], "-errorcode") == 0) { + iPtr->errorCode = (char *) ckalloc((unsigned) (strlen(argv[1]) + 1)); + strcpy(iPtr->errorCode, argv[1]); + } else { + Tcl_AppendResult(interp, "bad option \"", argv[0], + ": must be -code, -errorcode, or -errorinfo", + (char *) NULL); + return TCL_ERROR; + } + } + if (argc == 1) { + Tcl_SetResult(interp, argv[0], TCL_VOLATILE); + } + iPtr->returnCode = code; + return TCL_RETURN; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_ScanCmd -- + * + * This procedure is invoked to process the "scan" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_ScanCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ +# define MAX_FIELDS 20 + typedef struct { + char fmt; /* Format for field. */ + int size; /* How many bytes to allow for + * field. */ + char *location; /* Where field will be stored. */ + } Field; + Field fields[MAX_FIELDS]; /* Info about all the fields in the + * format string. */ + register Field *curField; + int numFields = 0; /* Number of fields actually + * specified. */ + int suppress; /* Current field is assignment- + * suppressed. */ + int totalSize = 0; /* Number of bytes needed to store + * all results combined. */ + char *results; /* Where scanned output goes. + * Malloced; NULL means not allocated + * yet. */ + int numScanned; /* sscanf's result. */ + register char *fmt; + int i, widthSpecified, length, code; + + /* + * The variables below are used to hold a copy of the format + * string, so that we can replace format specifiers like "%f" + * and "%F" with specifiers like "%lf" + */ + +# define STATIC_SIZE 5 + char copyBuf[STATIC_SIZE], *fmtCopy; + register char *dst; + + if (argc < 3) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " string format ?varName varName ...?\"", (char *) NULL); + return TCL_ERROR; + } + + /* + * This procedure operates in four stages: + * 1. Scan the format string, collecting information about each field. + * 2. Allocate an array to hold all of the scanned fields. + * 3. Call sscanf to do all the dirty work, and have it store the + * parsed fields in the array. + * 4. Pick off the fields from the array and assign them to variables. + */ + + code = TCL_OK; + results = NULL; + length = strlen(argv[2]) * 2 + 1; + if (length < STATIC_SIZE) { + fmtCopy = copyBuf; + } else { + fmtCopy = (char *) ckalloc((unsigned) length); + } + dst = fmtCopy; + for (fmt = argv[2]; *fmt != 0; fmt++) { + *dst = *fmt; + dst++; + if (*fmt != '%') { + continue; + } + fmt++; + if (*fmt == '%') { + *dst = *fmt; + dst++; + continue; + } + if (*fmt == '*') { + suppress = 1; + *dst = *fmt; + dst++; + fmt++; + } else { + suppress = 0; + } + widthSpecified = 0; + while (isdigit(UCHAR(*fmt))) { + widthSpecified = 1; + *dst = *fmt; + dst++; + fmt++; + } + if ((*fmt == 'l') || (*fmt == 'h') || (*fmt == 'L')) { + fmt++; + } + *dst = *fmt; + dst++; + if (suppress) { + continue; + } + if (numFields == MAX_FIELDS) { + interp->result = "too many fields to scan"; + code = TCL_ERROR; + goto done; + } + curField = &fields[numFields]; + numFields++; + switch (*fmt) { + case 'd': + case 'i': + case 'o': + case 'x': + curField->fmt = 'd'; + curField->size = sizeof(int); + break; + + case 'u': + curField->fmt = 'u'; + curField->size = sizeof(int); + break; + + case 's': + curField->fmt = 's'; + curField->size = strlen(argv[1]) + 1; + break; + + case 'c': + if (widthSpecified) { + interp->result = + "field width may not be specified in %c conversion"; + code = TCL_ERROR; + goto done; + } + curField->fmt = 'c'; + curField->size = sizeof(int); + break; + + case 'e': + case 'f': + case 'g': + dst[-1] = 'l'; + dst[0] = 'f'; + dst++; + curField->fmt = 'f'; + curField->size = sizeof(double); + break; + + case '[': + curField->fmt = 's'; + curField->size = strlen(argv[1]) + 1; + do { + fmt++; + if (*fmt == 0) { + interp->result = "unmatched [ in format string"; + code = TCL_ERROR; + goto done; + } + *dst = *fmt; + dst++; + } while (*fmt != ']'); + break; + + default: + sprintf(interp->result, "bad scan conversion character \"%c\"", + *fmt); + code = TCL_ERROR; + goto done; + } + curField->size = TCL_ALIGN(curField->size); + totalSize += curField->size; + } + *dst = 0; + + if (numFields != (argc-3)) { + interp->result = + "different numbers of variable names and field specifiers"; + code = TCL_ERROR; + goto done; + } + + /* + * Step 2: + */ + + results = (char *) ckalloc((unsigned) totalSize); + for (i = 0, totalSize = 0, curField = fields; + i < numFields; i++, curField++) { + curField->location = results + totalSize; + totalSize += curField->size; + } + + /* + * Fill in the remaining fields with NULL; the only purpose of + * this is to keep some memory analyzers, like Purify, from + * complaining. + */ + + for ( ; i < MAX_FIELDS; i++, curField++) { + curField->location = NULL; + } + + /* + * Step 3: + */ + + numScanned = sscanf(argv[1], fmtCopy, + fields[0].location, fields[1].location, fields[2].location, + fields[3].location, fields[4].location, fields[5].location, + fields[6].location, fields[7].location, fields[8].location, + fields[9].location, fields[10].location, fields[11].location, + fields[12].location, fields[13].location, fields[14].location, + fields[15].location, fields[16].location, fields[17].location, + fields[18].location, fields[19].location); + + /* + * Step 4: + */ + + if (numScanned < numFields) { + numFields = numScanned; + } + for (i = 0, curField = fields; i < numFields; i++, curField++) { + switch (curField->fmt) { + char string[TCL_DOUBLE_SPACE]; + + case 'd': + sprintf(string, "%d", *((int *) curField->location)); + if (Tcl_SetVar(interp, argv[i+3], string, 0) == NULL) { + storeError: + Tcl_AppendResult(interp, + "couldn't set variable \"", argv[i+3], "\"", + (char *) NULL); + code = TCL_ERROR; + goto done; + } + break; + + case 'u': + sprintf(string, "%u", *((int *) curField->location)); + if (Tcl_SetVar(interp, argv[i+3], string, 0) == NULL) { + goto storeError; + } + break; + + case 'c': + sprintf(string, "%d", *((char *) curField->location) & 0xff); + if (Tcl_SetVar(interp, argv[i+3], string, 0) == NULL) { + goto storeError; + } + break; + + case 's': + if (Tcl_SetVar(interp, argv[i+3], curField->location, 0) + == NULL) { + goto storeError; + } + break; + + case 'f': + Tcl_PrintDouble(interp, *((double *) curField->location), + string); + if (Tcl_SetVar(interp, argv[i+3], string, 0) == NULL) { + goto storeError; + } + break; + } + } + sprintf(interp->result, "%d", numScanned); + done: + if (results != NULL) { + ckfree(results); + } + if (fmtCopy != copyBuf) { + ckfree(fmtCopy); + } + return code; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_SourceCmd -- + * + * This procedure is invoked to process the "source" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_SourceCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + if (argc != 2) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " fileName\"", (char *) NULL); + return TCL_ERROR; + } + return Tcl_EvalFile(interp, argv[1]); +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_SplitCmd -- + * + * This procedure is invoked to process the "split" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_SplitCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + char *splitChars; + register char *p, *p2; + char *elementStart; + + if (argc == 2) { + splitChars = " \n\t\r"; + } else if (argc == 3) { + splitChars = argv[2]; + } else { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " string ?splitChars?\"", (char *) NULL); + return TCL_ERROR; + } + + /* + * Handle the special case of splitting on every character. + */ + + if (*splitChars == 0) { + char string[2]; + string[1] = 0; + for (p = argv[1]; *p != 0; p++) { + string[0] = *p; + Tcl_AppendElement(interp, string); + } + return TCL_OK; + } + + /* + * Normal case: split on any of a given set of characters. + * Discard instances of the split characters. + */ + + for (p = elementStart = argv[1]; *p != 0; p++) { + char c = *p; + for (p2 = splitChars; *p2 != 0; p2++) { + if (*p2 == c) { + *p = 0; + Tcl_AppendElement(interp, elementStart); + *p = c; + elementStart = p+1; + break; + } + } + } + if (p != argv[1]) { + Tcl_AppendElement(interp, elementStart); + } + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_StringCmd -- + * + * This procedure is invoked to process the "string" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_StringCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + size_t length; + register char *p; + int match, c, first; + int left = 0, right = 0; + + if (argc < 2) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " option arg ?arg ...?\"", (char *) NULL); + return TCL_ERROR; + } + c = argv[1][0]; + length = strlen(argv[1]); + if ((c == 'c') && (strncmp(argv[1], "compare", length) == 0)) { + if (argc != 4) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " compare string1 string2\"", (char *) NULL); + return TCL_ERROR; + } + match = strcmp(argv[2], argv[3]); + if (match > 0) { + interp->result = "1"; + } else if (match < 0) { + interp->result = "-1"; + } else { + interp->result = "0"; + } + return TCL_OK; + } else if ((c == 'f') && (strncmp(argv[1], "first", length) == 0)) { + if (argc != 4) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " first string1 string2\"", (char *) NULL); + return TCL_ERROR; + } + first = 1; + + firstLast: + match = -1; + c = *argv[2]; + length = strlen(argv[2]); + for (p = argv[3]; *p != 0; p++) { + if (*p != c) { + continue; + } + if (strncmp(argv[2], p, length) == 0) { + match = p-argv[3]; + if (first) { + break; + } + } + } + sprintf(interp->result, "%d", match); + return TCL_OK; + } else if ((c == 'i') && (strncmp(argv[1], "index", length) == 0)) { + int index; + + if (argc != 4) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " index string charIndex\"", (char *) NULL); + return TCL_ERROR; + } + if (Tcl_GetInt(interp, argv[3], &index) != TCL_OK) { + return TCL_ERROR; + } + if ((index >= 0) && (index < (int) strlen(argv[2]))) { + interp->result[0] = argv[2][index]; + interp->result[1] = 0; + } + return TCL_OK; + } else if ((c == 'l') && (strncmp(argv[1], "last", length) == 0) + && (length >= 2)) { + if (argc != 4) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " last string1 string2\"", (char *) NULL); + return TCL_ERROR; + } + first = 0; + goto firstLast; + } else if ((c == 'l') && (strncmp(argv[1], "length", length) == 0) + && (length >= 2)) { + if (argc != 3) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " length string\"", (char *) NULL); + return TCL_ERROR; + } + sprintf(interp->result, "%d", strlen(argv[2])); + return TCL_OK; + } else if ((c == 'm') && (strncmp(argv[1], "match", length) == 0)) { + if (argc != 4) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " match pattern string\"", (char *) NULL); + return TCL_ERROR; + } + if (Tcl_StringMatch(argv[3], argv[2]) != 0) { + interp->result = "1"; + } else { + interp->result = "0"; + } + return TCL_OK; + } else if ((c == 'r') && (strncmp(argv[1], "range", length) == 0)) { + int first, last, stringLength; + + if (argc != 5) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " range string first last\"", (char *) NULL); + return TCL_ERROR; + } + stringLength = strlen(argv[2]); + if (Tcl_GetInt(interp, argv[3], &first) != TCL_OK) { + return TCL_ERROR; + } + if ((*argv[4] == 'e') + && (strncmp(argv[4], "end", strlen(argv[4])) == 0)) { + last = stringLength-1; + } else { + if (Tcl_GetInt(interp, argv[4], &last) != TCL_OK) { + Tcl_ResetResult(interp); + Tcl_AppendResult(interp, + "expected integer or \"end\" but got \"", + argv[4], "\"", (char *) NULL); + return TCL_ERROR; + } + } + if (first < 0) { + first = 0; + } + if (last >= stringLength) { + last = stringLength-1; + } + if (last >= first) { + char saved, *p; + + p = argv[2] + last + 1; + saved = *p; + *p = 0; + Tcl_SetResult(interp, argv[2] + first, TCL_VOLATILE); + *p = saved; + } + return TCL_OK; + } else if ((c == 't') && (strncmp(argv[1], "tolower", length) == 0) + && (length >= 3)) { + register char *p; + + if (argc != 3) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " tolower string\"", (char *) NULL); + return TCL_ERROR; + } + Tcl_SetResult(interp, argv[2], TCL_VOLATILE); + for (p = interp->result; *p != 0; p++) { + if (isupper(UCHAR(*p))) { + *p = (char)tolower(UCHAR(*p)); + } + } + return TCL_OK; + } else if ((c == 't') && (strncmp(argv[1], "toupper", length) == 0) + && (length >= 3)) { + register char *p; + + if (argc != 3) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " toupper string\"", (char *) NULL); + return TCL_ERROR; + } + Tcl_SetResult(interp, argv[2], TCL_VOLATILE); + for (p = interp->result; *p != 0; p++) { + if (islower(UCHAR(*p))) { + *p = (char) toupper(UCHAR(*p)); + } + } + return TCL_OK; + } else if ((c == 't') && (strncmp(argv[1], "trim", length) == 0) + && (length == 4)) { + char *trimChars; + register char *p, *checkPtr; + + left = right = 1; + + trim: + if (argc == 4) { + trimChars = argv[3]; + } else if (argc == 3) { + trimChars = " \t\n\r"; + } else { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " ", argv[1], " string ?chars?\"", (char *) NULL); + return TCL_ERROR; + } + p = argv[2]; + if (left) { + for (c = *p; c != 0; p++, c = *p) { + for (checkPtr = trimChars; *checkPtr != c; checkPtr++) { + if (*checkPtr == 0) { + goto doneLeft; + } + } + } + } + doneLeft: + Tcl_SetResult(interp, p, TCL_VOLATILE); + if (right) { + char *donePtr; + + p = interp->result + strlen(interp->result) - 1; + donePtr = &interp->result[-1]; + for (c = *p; p != donePtr; p--, c = *p) { + for (checkPtr = trimChars; *checkPtr != c; checkPtr++) { + if (*checkPtr == 0) { + goto doneRight; + } + } + } + doneRight: + p[1] = 0; + } + return TCL_OK; + } else if ((c == 't') && (strncmp(argv[1], "trimleft", length) == 0) + && (length > 4)) { + left = 1; + argv[1] = "trimleft"; + goto trim; + } else if ((c == 't') && (strncmp(argv[1], "trimright", length) == 0) + && (length > 4)) { + right = 1; + argv[1] = "trimright"; + goto trim; + } else if ((c == 'w') && (strncmp(argv[1], "wordend", length) == 0) + && (length > 4)) { + int length, index, cur; + char *string; + + if (argc != 4) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " ", argv[1], " string index\"", (char *) NULL); + return TCL_ERROR; + } + string = argv[2]; + if (Tcl_GetInt(interp, argv[3], &index) != TCL_OK) { + return TCL_ERROR; + } + length = strlen(argv[2]); + if (index < 0) { + index = 0; + } + if (index >= length) { + cur = length; + goto wordendDone; + } + for (cur = index ; cur < length; cur++) { + c = UCHAR(string[cur]); + if (!isalnum(c) && (c != '_')) { + break; + } + } + if (cur == index) { + cur = index+1; + } + wordendDone: + sprintf(interp->result, "%d", cur); + return TCL_OK; + } else if ((c == 'w') && (strncmp(argv[1], "wordstart", length) == 0) + && (length > 4)) { + int length, index, cur; + char *string; + + if (argc != 4) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " ", argv[1], " string index\"", (char *) NULL); + return TCL_ERROR; + } + string = argv[2]; + if (Tcl_GetInt(interp, argv[3], &index) != TCL_OK) { + return TCL_ERROR; + } + length = strlen(argv[2]); + if (index >= length) { + index = length-1; + } + if (index <= 0) { + cur = 0; + goto wordstartDone; + } + for (cur = index ; cur >= 0; cur--) { + c = UCHAR(string[cur]); + if (!isalnum(c) && (c != '_')) { + break; + } + } + if (cur != index) { + cur += 1; + } + wordstartDone: + sprintf(interp->result, "%d", cur); + return TCL_OK; + } else { + Tcl_AppendResult(interp, "bad option \"", argv[1], + "\": should be compare, first, index, last, length, match, ", + "range, tolower, toupper, trim, trimleft, trimright, ", + "wordend, or wordstart", (char *) NULL); + return TCL_ERROR; + } +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_SubstCmd -- + * + * This procedure is invoked to process the "subst" Tcl command. + * See the user documentation for details on what it does. This + * command is an almost direct copy of an implementation by + * Andrew Payne. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_SubstCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + Interp *iPtr = (Interp *) interp; + Tcl_DString result; + char *p, *old, *value; + int code, count, doVars, doCmds, doBackslashes, i; + size_t length; + char c; + + /* + * Parse command-line options. + */ + + doVars = doCmds = doBackslashes = 1; + for (i = 1; i < (argc-1); i++) { + p = argv[i]; + if (*p != '-') { + break; + } + length = strlen(p); + if (length < 4) { + badSwitch: + Tcl_AppendResult(interp, "bad switch \"", p, + "\": must be -nobackslashes, -nocommands, ", + "or -novariables", (char *) NULL); + return TCL_ERROR; + } + if ((p[3] == 'b') && (strncmp(p, "-nobackslashes", length) == 0)) { + doBackslashes = 0; + } else if ((p[3] == 'c') && (strncmp(p, "-nocommands", length) == 0)) { + doCmds = 0; + } else if ((p[3] == 'v') && (strncmp(p, "-novariables", length) == 0)) { + doVars = 0; + } else { + goto badSwitch; + } + } + if (i != (argc-1)) { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " ?-nobackslashes? ?-nocommands? ?-novariables? string\"", + (char *) NULL); + return TCL_ERROR; + } + + /* + * Scan through the string one character at a time, performing + * command, variable, and backslash substitutions. + */ + + Tcl_DStringInit(&result); + old = p = argv[i]; + while (*p != 0) { + switch (*p) { + case '\\': + if (doBackslashes) { + if (p != old) { + Tcl_DStringAppend(&result, old, p-old); + } + c = Tcl_Backslash(p, &count); + Tcl_DStringAppend(&result, &c, 1); + p += count; + old = p; + } else { + p++; + } + break; + + case '$': + if (doVars) { + if (p != old) { + Tcl_DStringAppend(&result, old, p-old); + } + value = Tcl_ParseVar(interp, p, &p); + if (value == NULL) { + Tcl_DStringFree(&result); + return TCL_ERROR; + } + Tcl_DStringAppend(&result, value, -1); + old = p; + } else { + p++; + } + break; + + case '[': + if (doCmds) { + if (p != old) { + Tcl_DStringAppend(&result, old, p-old); + } + iPtr->evalFlags = TCL_BRACKET_TERM; + code = Tcl_Eval(interp, p+1); + if (code == TCL_ERROR) { + Tcl_DStringFree(&result); + return code; + } + old = p = iPtr->termPtr+1; + Tcl_DStringAppend(&result, iPtr->result, -1); + Tcl_ResetResult(interp); + } else { + p++; + } + break; + + default: + p++; + break; + } + } + if (p != old) { + Tcl_DStringAppend(&result, old, p-old); + } + Tcl_DStringResult(interp, &result); + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_SwitchCmd -- + * + * This procedure is invoked to process the "switch" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_SwitchCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ +#define EXACT 0 +#define GLOB 1 +#define REGEXP 2 + int i, code, mode, matched; + int body; + char *string; + int switchArgc, splitArgs; + char **switchArgv; + + switchArgc = argc-1; + switchArgv = argv+1; + mode = EXACT; + while ((switchArgc > 0) && (*switchArgv[0] == '-')) { + if (strcmp(*switchArgv, "-exact") == 0) { + mode = EXACT; + } else if (strcmp(*switchArgv, "-glob") == 0) { + mode = GLOB; + } else if (strcmp(*switchArgv, "-regexp") == 0) { + mode = REGEXP; + } else if (strcmp(*switchArgv, "--") == 0) { + switchArgc--; + switchArgv++; + break; + } else { + Tcl_AppendResult(interp, "bad option \"", switchArgv[0], + "\": should be -exact, -glob, -regexp, or --", + (char *) NULL); + return TCL_ERROR; + } + switchArgc--; + switchArgv++; + } + if (switchArgc < 2) { + Tcl_AppendResult(interp, "wrong # args: should be \"", + argv[0], " ?switches? string pattern body ... ?default body?\"", + (char *) NULL); + return TCL_ERROR; + } + string = *switchArgv; + switchArgc--; + switchArgv++; + + /* + * If all of the pattern/command pairs are lumped into a single + * argument, split them out again. + */ + + splitArgs = 0; + if (switchArgc == 1) { + code = Tcl_SplitList(interp, switchArgv[0], &switchArgc, &switchArgv); + if (code != TCL_OK) { + return code; + } + splitArgs = 1; + } + + for (i = 0; i < switchArgc; i += 2) { + if (i == (switchArgc-1)) { + interp->result = "extra switch pattern with no body"; + code = TCL_ERROR; + goto cleanup; + } + + /* + * See if the pattern matches the string. + */ + + matched = 0; + if ((*switchArgv[i] == 'd') && (i == switchArgc-2) + && (strcmp(switchArgv[i], "default") == 0)) { + matched = 1; + } else { + switch (mode) { + case EXACT: + matched = (strcmp(string, switchArgv[i]) == 0); + break; + case GLOB: + matched = Tcl_StringMatch(string, switchArgv[i]); + break; + case REGEXP: + matched = Tcl_RegExpMatch(interp, string, switchArgv[i]); + if (matched < 0) { + code = TCL_ERROR; + goto cleanup; + } + break; + } + } + if (!matched) { + continue; + } + + /* + * We've got a match. Find a body to execute, skipping bodies + * that are "-". + */ + + for (body = i+1; ; body += 2) { + if (body >= switchArgc) { + Tcl_AppendResult(interp, "no body specified for pattern \"", + switchArgv[i], "\"", (char *) NULL); + code = TCL_ERROR; + goto cleanup; + } + if ((switchArgv[body][0] != '-') || (switchArgv[body][1] != 0)) { + break; + } + } + code = Tcl_Eval(interp, switchArgv[body]); + if (code == TCL_ERROR) { + char msg[100]; + sprintf(msg, "\n (\"%.50s\" arm line %d)", switchArgv[i], + interp->errorLine); + Tcl_AddErrorInfo(interp, msg); + } + goto cleanup; + } + + /* + * Nothing matched: return nothing. + */ + + code = TCL_OK; + + cleanup: + if (splitArgs) { + ckfree((char *) switchArgv); + } + return code; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_TimeCmd -- + * + * This procedure is invoked to process the "time" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_TimeCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + int count, i, result; + double timePer; + Tcl_Time start, stop; + + if (argc == 2) { + count = 1; + } else if (argc == 3) { + if (Tcl_GetInt(interp, argv[2], &count) != TCL_OK) { + return TCL_ERROR; + } + } else { + Tcl_AppendResult(interp, "wrong # args: should be \"", argv[0], + " command ?count?\"", (char *) NULL); + return TCL_ERROR; + } + TclGetTime(&start); + for (i = count ; i > 0; i--) { + result = Tcl_Eval(interp, argv[1]); + if (result != TCL_OK) { + if (result == TCL_ERROR) { + char msg[60]; + sprintf(msg, "\n (\"time\" body line %d)", + interp->errorLine); + Tcl_AddErrorInfo(interp, msg); + } + return result; + } + } + TclGetTime(&stop); + timePer = (stop.sec - start.sec)*1000000 + (stop.usec - start.usec); + Tcl_ResetResult(interp); + sprintf(interp->result, "%.0f microseconds per iteration", + (count <= 0) ? 0 : timePer/count); + return TCL_OK; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_TraceCmd -- + * + * This procedure is invoked to process the "trace" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_TraceCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + int c; + size_t length; + + if (argc < 2) { + Tcl_AppendResult(interp, "too few args: should be \"", + argv[0], " option [arg arg ...]\"", (char *) NULL); + return TCL_ERROR; + } + c = argv[1][1]; + length = strlen(argv[1]); + if ((c == 'a') && (strncmp(argv[1], "variable", length) == 0) + && (length >= 2)) { + char *p; + int flags, length; + TraceVarInfo *tvarPtr; + + if (argc != 5) { + Tcl_AppendResult(interp, "wrong # args: should be \"", + argv[0], " variable name ops command\"", (char *) NULL); + return TCL_ERROR; + } + + flags = 0; + for (p = argv[3] ; *p != 0; p++) { + if (*p == 'r') { + flags |= TCL_TRACE_READS; + } else if (*p == 'w') { + flags |= TCL_TRACE_WRITES; + } else if (*p == 'u') { + flags |= TCL_TRACE_UNSETS; + } else { + goto badOps; + } + } + if (flags == 0) { + goto badOps; + } + + length = strlen(argv[4]); + tvarPtr = (TraceVarInfo *) ckalloc((unsigned) + (sizeof(TraceVarInfo) - sizeof(tvarPtr->command) + length + 1)); + tvarPtr->flags = flags; + tvarPtr->errMsg = NULL; + tvarPtr->length = length; + flags |= TCL_TRACE_UNSETS; + strcpy(tvarPtr->command, argv[4]); + if (Tcl_TraceVar(interp, argv[2], flags, TraceVarProc, + (ClientData) tvarPtr) != TCL_OK) { + ckfree((char *) tvarPtr); + return TCL_ERROR; + } + } else if ((c == 'd') && (strncmp(argv[1], "vdelete", length) + && (length >= 2)) == 0) { + char *p; + int flags, length; + TraceVarInfo *tvarPtr; + ClientData clientData; + + if (argc != 5) { + Tcl_AppendResult(interp, "wrong # args: should be \"", + argv[0], " vdelete name ops command\"", (char *) NULL); + return TCL_ERROR; + } + + flags = 0; + for (p = argv[3] ; *p != 0; p++) { + if (*p == 'r') { + flags |= TCL_TRACE_READS; + } else if (*p == 'w') { + flags |= TCL_TRACE_WRITES; + } else if (*p == 'u') { + flags |= TCL_TRACE_UNSETS; + } else { + goto badOps; + } + } + if (flags == 0) { + goto badOps; + } + + /* + * Search through all of our traces on this variable to + * see if there's one with the given command. If so, then + * delete the first one that matches. + */ + + length = strlen(argv[4]); + clientData = 0; + while ((clientData = Tcl_VarTraceInfo(interp, argv[2], 0, + TraceVarProc, clientData)) != 0) { + tvarPtr = (TraceVarInfo *) clientData; + if ((tvarPtr->length == length) && (tvarPtr->flags == flags) + && (strncmp(argv[4], tvarPtr->command, + (size_t) length) == 0)) { + Tcl_UntraceVar(interp, argv[2], flags | TCL_TRACE_UNSETS, + TraceVarProc, clientData); + if (tvarPtr->errMsg != NULL) { + ckfree(tvarPtr->errMsg); + } + ckfree((char *) tvarPtr); + break; + } + } + } else if ((c == 'i') && (strncmp(argv[1], "vinfo", length) == 0) + && (length >= 2)) { + ClientData clientData; + char ops[4], *p; + char *prefix = "{"; + + if (argc != 3) { + Tcl_AppendResult(interp, "wrong # args: should be \"", + argv[0], " vinfo name\"", (char *) NULL); + return TCL_ERROR; + } + clientData = 0; + while ((clientData = Tcl_VarTraceInfo(interp, argv[2], 0, + TraceVarProc, clientData)) != 0) { + TraceVarInfo *tvarPtr = (TraceVarInfo *) clientData; + p = ops; + if (tvarPtr->flags & TCL_TRACE_READS) { + *p = 'r'; + p++; + } + if (tvarPtr->flags & TCL_TRACE_WRITES) { + *p = 'w'; + p++; + } + if (tvarPtr->flags & TCL_TRACE_UNSETS) { + *p = 'u'; + p++; + } + *p = '\0'; + Tcl_AppendResult(interp, prefix, (char *) NULL); + Tcl_AppendElement(interp, ops); + Tcl_AppendElement(interp, tvarPtr->command); + Tcl_AppendResult(interp, "}", (char *) NULL); + prefix = " {"; + } + } else { + Tcl_AppendResult(interp, "bad option \"", argv[1], + "\": should be variable, vdelete, or vinfo", + (char *) NULL); + return TCL_ERROR; + } + return TCL_OK; + + badOps: + Tcl_AppendResult(interp, "bad operations \"", argv[3], + "\": should be one or more of rwu", (char *) NULL); + return TCL_ERROR; +} + +/* + *---------------------------------------------------------------------- + * + * TraceVarProc -- + * + * This procedure is called to handle variable accesses that have + * been traced using the "trace" command. + * + * Results: + * Normally returns NULL. If the trace command returns an error, + * then this procedure returns an error string. + * + * Side effects: + * Depends on the command associated with the trace. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +static char * +TraceVarProc(clientData, interp, name1, name2, flags) + ClientData clientData; /* Information about the variable trace. */ + Tcl_Interp *interp; /* Interpreter containing variable. */ + char *name1; /* Name of variable or array. */ + char *name2; /* Name of element within array; NULL means + * scalar variable is being referenced. */ + int flags; /* OR-ed bits giving operation and other + * information. */ +{ + TraceVarInfo *tvarPtr = (TraceVarInfo *) clientData; + char *result; + int code; + Interp dummy; + Tcl_DString cmd; + + result = NULL; + if (tvarPtr->errMsg != NULL) { + ckfree(tvarPtr->errMsg); + tvarPtr->errMsg = NULL; + } + if ((tvarPtr->flags & flags) && !(flags & TCL_INTERP_DESTROYED)) { + + /* + * Generate a command to execute by appending list elements + * for the two variable names and the operation. The five + * extra characters are for three space, the opcode character, + * and the terminating null. + */ + + if (name2 == NULL) { + name2 = ""; + } + Tcl_DStringInit(&cmd); + Tcl_DStringAppend(&cmd, tvarPtr->command, tvarPtr->length); + Tcl_DStringAppendElement(&cmd, name1); + Tcl_DStringAppendElement(&cmd, name2); + if (flags & TCL_TRACE_READS) { + Tcl_DStringAppend(&cmd, " r", 2); + } else if (flags & TCL_TRACE_WRITES) { + Tcl_DStringAppend(&cmd, " w", 2); + } else if (flags & TCL_TRACE_UNSETS) { + Tcl_DStringAppend(&cmd, " u", 2); + } + + /* + * Execute the command. Be careful to save and restore the + * result from the interpreter used for the command. + */ + + if (interp->freeProc == 0) { + dummy.freeProc = (Tcl_FreeProc *) 0; + dummy.result = ""; + Tcl_SetResult((Tcl_Interp *) &dummy, interp->result, TCL_VOLATILE); + } else { + dummy.freeProc = interp->freeProc; + dummy.result = interp->result; + interp->freeProc = (Tcl_FreeProc *) 0; + } + code = Tcl_Eval(interp, Tcl_DStringValue(&cmd)); + Tcl_DStringFree(&cmd); + if (code != TCL_OK) { + tvarPtr->errMsg = (char *) ckalloc((unsigned) (strlen(interp->result) + 1)); + strcpy(tvarPtr->errMsg, interp->result); + result = tvarPtr->errMsg; + Tcl_ResetResult(interp); /* Must clear error state. */ + } + Tcl_SetResult(interp, dummy.result, + (dummy.freeProc == 0) ? TCL_VOLATILE : dummy.freeProc); + } + if (flags & TCL_TRACE_DESTROYED) { + result = NULL; + if (tvarPtr->errMsg != NULL) { + ckfree(tvarPtr->errMsg); + } + ckfree((char *) tvarPtr); + } + return result; +} + +/* + *---------------------------------------------------------------------- + * + * Tcl_WhileCmd -- + * + * This procedure is invoked to process the "while" Tcl command. + * See the user documentation for details on what it does. + * + * Results: + * A standard Tcl result. + * + * Side effects: + * See the user documentation. + * + *---------------------------------------------------------------------- + */ + + /* ARGSUSED */ +int +Tcl_WhileCmd(dummy, interp, argc, argv) + ClientData dummy; /* Not used. */ + Tcl_Interp *interp; /* Current interpreter. */ + int argc; /* Number of arguments. */ + char **argv; /* Argument strings. */ +{ + int result, value; + + if (argc != 3) { + Tcl_AppendResult(interp, "wrong # args: should be \"", + argv[0], " test command\"", (char *) NULL); + return TCL_ERROR; + } + + while (1) { + result = Tcl_ExprBoolean(interp, argv[1], &value); + if (result != TCL_OK) { + return result; + } + if (!value) { + break; + } + result = Tcl_Eval(interp, argv[2]); + if ((result != TCL_OK) && (result != TCL_CONTINUE)) { + if (result == TCL_ERROR) { + char msg[60]; + sprintf(msg, "\n (\"while\" body line %d)", + interp->errorLine); + Tcl_AddErrorInfo(interp, msg); + } + break; + } + } + if (result == TCL_BREAK) { + result = TCL_OK; + } + if (result == TCL_OK) { + Tcl_ResetResult(interp); + } + return result; +} |
