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-rw-r--r--generic/tclGet.c328
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diff --git a/generic/tclGet.c b/generic/tclGet.c
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+/*
+ * tclGet.c --
+ *
+ * This file contains procedures to convert strings into
+ * other forms, like integers or floating-point numbers or
+ * booleans, doing syntax checking along the way.
+ *
+ * Copyright (c) 1990-1993 The Regents of the University of California.
+ * Copyright (c) 1994-1995 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: @(#) tclGet.c 1.33 97/05/14 16:42:19
+ */
+
+#include "tclInt.h"
+#include "tclPort.h"
+
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetInt --
+ *
+ * Given a string, produce the corresponding integer value.
+ *
+ * Results:
+ * The return value is normally TCL_OK; in this case *intPtr
+ * will be set to the integer value equivalent to string. If
+ * string is improperly formed then TCL_ERROR is returned and
+ * an error message will be left in interp->result.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_GetInt(interp, string, intPtr)
+ Tcl_Interp *interp; /* Interpreter to use for error reporting. */
+ char *string; /* String containing a (possibly signed)
+ * integer in a form acceptable to strtol. */
+ int *intPtr; /* Place to store converted result. */
+{
+ char *end, *p;
+ long i;
+
+ /*
+ * Note: use strtoul instead of strtol for integer conversions
+ * to allow full-size unsigned numbers, but don't depend on strtoul
+ * to handle sign characters; it won't in some implementations.
+ */
+
+ errno = 0;
+ for (p = string; isspace(UCHAR(*p)); p++) {
+ /* Empty loop body. */
+ }
+ if (*p == '-') {
+ p++;
+ i = -((long)strtoul(p, &end, 0));
+ } else if (*p == '+') {
+ p++;
+ i = strtoul(p, &end, 0);
+ } else {
+ i = strtoul(p, &end, 0);
+ }
+ if (end == p) {
+ badInteger:
+ if (interp != (Tcl_Interp *) NULL) {
+ Tcl_AppendResult(interp, "expected integer but got \"", string,
+ "\"", (char *) NULL);
+ }
+ return TCL_ERROR;
+ }
+
+ /*
+ * The second test below is needed on platforms where "long" is
+ * larger than "int" to detect values that fit in a long but not in
+ * an int.
+ */
+
+ if ((errno == ERANGE) || (((long)(int) i) != i)) {
+ if (interp != (Tcl_Interp *) NULL) {
+ Tcl_SetResult(interp, "integer value too large to represent",
+ TCL_STATIC);
+ Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
+ interp->result, (char *) NULL);
+ }
+ return TCL_ERROR;
+ }
+ while ((*end != '\0') && isspace(UCHAR(*end))) {
+ end++;
+ }
+ if (*end != 0) {
+ goto badInteger;
+ }
+ *intPtr = (int) i;
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * TclGetLong --
+ *
+ * Given a string, produce the corresponding long integer value.
+ * This routine is a version of Tcl_GetInt but returns a "long"
+ * instead of an "int".
+ *
+ * Results:
+ * The return value is normally TCL_OK; in this case *longPtr
+ * will be set to the long integer value equivalent to string. If
+ * string is improperly formed then TCL_ERROR is returned and
+ * an error message will be left in interp->result.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+TclGetLong(interp, string, longPtr)
+ Tcl_Interp *interp; /* Interpreter used for error reporting. */
+ char *string; /* String containing a (possibly signed)
+ * long integer in a form acceptable to
+ * strtoul. */
+ long *longPtr; /* Place to store converted long result. */
+{
+ char *end, *p;
+ long i;
+
+ /*
+ * Note: don't depend on strtoul to handle sign characters; it won't
+ * in some implementations.
+ */
+
+ errno = 0;
+ for (p = string; isspace(UCHAR(*p)); p++) {
+ /* Empty loop body. */
+ }
+ if (*p == '-') {
+ p++;
+ i = -(int)strtoul(p, &end, 0);
+ } else if (*p == '+') {
+ p++;
+ i = strtoul(p, &end, 0);
+ } else {
+ i = strtoul(p, &end, 0);
+ }
+ if (end == p) {
+ badInteger:
+ if (interp != (Tcl_Interp *) NULL) {
+ Tcl_AppendResult(interp, "expected integer but got \"", string,
+ "\"", (char *) NULL);
+ }
+ return TCL_ERROR;
+ }
+ if (errno == ERANGE) {
+ if (interp != (Tcl_Interp *) NULL) {
+ Tcl_SetResult(interp, "integer value too large to represent",
+ TCL_STATIC);
+ Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
+ interp->result, (char *) NULL);
+ }
+ return TCL_ERROR;
+ }
+ while ((*end != '\0') && isspace(UCHAR(*end))) {
+ end++;
+ }
+ if (*end != 0) {
+ goto badInteger;
+ }
+ *longPtr = i;
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetDouble --
+ *
+ * Given a string, produce the corresponding double-precision
+ * floating-point value.
+ *
+ * Results:
+ * The return value is normally TCL_OK; in this case *doublePtr
+ * will be set to the double-precision value equivalent to string.
+ * If string is improperly formed then TCL_ERROR is returned and
+ * an error message will be left in interp->result.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_GetDouble(interp, string, doublePtr)
+ Tcl_Interp *interp; /* Interpreter used for error reporting. */
+ char *string; /* String containing a floating-point number
+ * in a form acceptable to strtod. */
+ double *doublePtr; /* Place to store converted result. */
+{
+ char *end;
+ double d;
+
+ errno = 0;
+ d = strtod(string, &end);
+ if (end == string) {
+ badDouble:
+ if (interp != (Tcl_Interp *) NULL) {
+ Tcl_AppendResult(interp,
+ "expected floating-point number but got \"",
+ string, "\"", (char *) NULL);
+ }
+ return TCL_ERROR;
+ }
+ if (errno != 0) {
+ if (interp != (Tcl_Interp *) NULL) {
+ TclExprFloatError(interp, d); /* sets interp->objResult */
+
+ /*
+ * Move the interpreter's object result to the string result,
+ * then reset the object result.
+ * FAILS IF OBJECT RESULT'S STRING REPRESENTATION HAS NULLS.
+ */
+
+ Tcl_SetResult(interp,
+ TclGetStringFromObj(Tcl_GetObjResult(interp),
+ (int *) NULL),
+ TCL_VOLATILE);
+ }
+ return TCL_ERROR;
+ }
+ while ((*end != 0) && isspace(UCHAR(*end))) {
+ end++;
+ }
+ if (*end != 0) {
+ goto badDouble;
+ }
+ *doublePtr = d;
+ return TCL_OK;
+}
+
+/*
+ *----------------------------------------------------------------------
+ *
+ * Tcl_GetBoolean --
+ *
+ * Given a string, return a 0/1 boolean value corresponding
+ * to the string.
+ *
+ * Results:
+ * The return value is normally TCL_OK; in this case *boolPtr
+ * will be set to the 0/1 value equivalent to string. If
+ * string is improperly formed then TCL_ERROR is returned and
+ * an error message will be left in interp->result.
+ *
+ * Side effects:
+ * None.
+ *
+ *----------------------------------------------------------------------
+ */
+
+int
+Tcl_GetBoolean(interp, string, boolPtr)
+ Tcl_Interp *interp; /* Interpreter used for error reporting. */
+ char *string; /* String containing a boolean number
+ * specified either as 1/0 or true/false or
+ * yes/no. */
+ int *boolPtr; /* Place to store converted result, which
+ * will be 0 or 1. */
+{
+ int i;
+ char lowerCase[10], c;
+ size_t length;
+
+ /*
+ * Convert the input string to all lower-case.
+ */
+
+ for (i = 0; i < 9; i++) {
+ c = string[i];
+ if (c == 0) {
+ break;
+ }
+ if ((c >= 'A') && (c <= 'Z')) {
+ c += (char) ('a' - 'A');
+ }
+ lowerCase[i] = c;
+ }
+ lowerCase[i] = 0;
+
+ length = strlen(lowerCase);
+ c = lowerCase[0];
+ if ((c == '0') && (lowerCase[1] == '\0')) {
+ *boolPtr = 0;
+ } else if ((c == '1') && (lowerCase[1] == '\0')) {
+ *boolPtr = 1;
+ } else if ((c == 'y') && (strncmp(lowerCase, "yes", length) == 0)) {
+ *boolPtr = 1;
+ } else if ((c == 'n') && (strncmp(lowerCase, "no", length) == 0)) {
+ *boolPtr = 0;
+ } else if ((c == 't') && (strncmp(lowerCase, "true", length) == 0)) {
+ *boolPtr = 1;
+ } else if ((c == 'f') && (strncmp(lowerCase, "false", length) == 0)) {
+ *boolPtr = 0;
+ } else if ((c == 'o') && (length >= 2)) {
+ if (strncmp(lowerCase, "on", length) == 0) {
+ *boolPtr = 1;
+ } else if (strncmp(lowerCase, "off", length) == 0) {
+ *boolPtr = 0;
+ } else {
+ goto badBoolean;
+ }
+ } else {
+ badBoolean:
+ if (interp != (Tcl_Interp *) NULL) {
+ Tcl_AppendResult(interp, "expected boolean value but got \"",
+ string, "\"", (char *) NULL);
+ }
+ return TCL_ERROR;
+ }
+ return TCL_OK;
+}
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