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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 1.24 96/02/15 11:42:47
*/
#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;
int 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 = -(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) {
interp->result = "integer value too large to represent";
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 = 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 to use 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);
}
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 to use 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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