shared_source/c_tcl_base_7_5_w_mods/tclget.c

/* $Header$ */
/* 
 * 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) 1994-1997 Sun Microsystems, Inc.
 *
 * See the file "license.terms" for information on usage and redistribution
 * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
 *
 * RCS: @(#) $Id: tclget.c,v 1.1.1.1 2001/06/13 04:39:21 dtashley Exp $
 */

#include "tclInt.h"
#include "tclPort.h"
#include "tclMath.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 the interp's 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++) { /* INTL: ISO space. */
        /* Empty loop body. */
    }
    if (*p == '-') {
        p++;
        i = -((long)strtoul(p, &end, 0)); /* INTL: Tcl source. */
    } else if (*p == '+') {
        p++;
        i = strtoul(p, &end, 0); /* INTL: Tcl source. */
    } else {
        i = strtoul(p, &end, 0); /* INTL: Tcl source. */
    }
    if (end == p) {
        badInteger:
        if (interp != (Tcl_Interp *) NULL) {
            Tcl_AppendResult(interp, "expected integer but got \"", string,
                    "\"", (char *) NULL);
            TclCheckBadOctal(interp, string);
        }
        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",
                    Tcl_GetStringResult(interp), (char *) NULL);
        }
        return TCL_ERROR;
    }
    while ((*end != '\0') && isspace(UCHAR(*end))) { /* INTL: ISO space. */
        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 the interp's result if interp
 *      is non-NULL. 
 *
 * Side effects:
 *      None.
 *
 *----------------------------------------------------------------------
 */

int
TclGetLong(interp, string, longPtr)
    Tcl_Interp *interp;         /* Interpreter used for error reporting
                                 * if not NULL. */
    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++) { /* INTL: ISO space. */
        /* Empty loop body. */
    }
    if (*p == '-') {
        p++;
        i = -(int)strtoul(p, &end, 0); /* INTL: Tcl source. */
    } else if (*p == '+') {
        p++;
        i = strtoul(p, &end, 0); /* INTL: Tcl source. */
    } else {
        i = strtoul(p, &end, 0); /* INTL: Tcl source. */
    }
    if (end == p) {
        badInteger:
        if (interp != (Tcl_Interp *) NULL) {
            Tcl_AppendResult(interp, "expected integer but got \"", string,
                    "\"", (char *) NULL);
            TclCheckBadOctal(interp, string);
        }
        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",
                    Tcl_GetStringResult(interp), (char *) NULL);
        }
        return TCL_ERROR;
    }
    while ((*end != '\0') && isspace(UCHAR(*end))) { /* INTL: ISO space. */
        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 the interp's 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); /* INTL: Tcl source. */
    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 && (d == HUGE_VAL || d == -HUGE_VAL || d == 0)) {
        if (interp != (Tcl_Interp *) NULL) {
            TclExprFloatError(interp, d); 
        }
        return TCL_ERROR;
    }
    while ((*end != 0) && isspace(UCHAR(*end))) { /* INTL: ISO space. */
        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 the interp's 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. 
     * INTL: This code will work on UTF strings.
     */

    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;
}

/* End of tclget.c */
1	/* $Header$ */
2	/*
3	* tclGet.c --
4	*
5	* This file contains procedures to convert strings into
6	* other forms, like integers or floating-point numbers or
7	* booleans, doing syntax checking along the way.
8	*
9	* Copyright (c) 1990-1993 The Regents of the University of California.
10	* Copyright (c) 1994-1997 Sun Microsystems, Inc.
11	*
12	* See the file "license.terms" for information on usage and redistribution
13	* of this file, and for a DISCLAIMER OF ALL WARRANTIES.
14	*
15	* RCS: @(#) $Id: tclget.c,v 1.1.1.1 2001/06/13 04:39:21 dtashley Exp $
16	*/
17
18	#include "tclInt.h"
19	#include "tclPort.h"
20	#include "tclMath.h"
21
22
23	/*
24	*----------------------------------------------------------------------
25	*
26	* Tcl_GetInt --
27	*
28	* Given a string, produce the corresponding integer value.
29	*
30	* Results:
31	* The return value is normally TCL_OK; in this case *intPtr
32	* will be set to the integer value equivalent to string. If
33	* string is improperly formed then TCL_ERROR is returned and
34	* an error message will be left in the interp's result.
35	*
36	* Side effects:
37	* None.
38	*
39	*----------------------------------------------------------------------
40	*/
41
42	int
43	Tcl_GetInt(interp, string, intPtr)
44	Tcl_Interp interp; / Interpreter to use for error reporting. */
45	char string; / String containing a (possibly signed)
46	* integer in a form acceptable to strtol. */
47	int intPtr; / Place to store converted result. */
48	{
49	char end, p;
50	long i;
51
52	/*
53	* Note: use strtoul instead of strtol for integer conversions
54	* to allow full-size unsigned numbers, but don't depend on strtoul
55	* to handle sign characters; it won't in some implementations.
56	*/
57
58	errno = 0;
59	for (p = string; isspace(UCHAR(p)); p++) { / INTL: ISO space. */
60	/* Empty loop body. */
61	}
62	if (*p == '-') {
63	p++;
64	i = -((long)strtoul(p, &end, 0)); /* INTL: Tcl source. */
65	} else if (*p == '+') {
66	p++;
67	i = strtoul(p, &end, 0); /* INTL: Tcl source. */
68	} else {
69	i = strtoul(p, &end, 0); /* INTL: Tcl source. */
70	}
71	if (end == p) {
72	badInteger:
73	if (interp != (Tcl_Interp *) NULL) {
74	Tcl_AppendResult(interp, "expected integer but got \"", string,
75	"\"", (char *) NULL);
76	TclCheckBadOctal(interp, string);
77	}
78	return TCL_ERROR;
79	}
80
81	/*
82	* The second test below is needed on platforms where "long" is
83	* larger than "int" to detect values that fit in a long but not in
84	* an int.
85	*/
86
87	if ((errno == ERANGE) \|\| (((long)(int) i) != i)) {
88	if (interp != (Tcl_Interp *) NULL) {
89	Tcl_SetResult(interp, "integer value too large to represent",
90	TCL_STATIC);
91	Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
92	Tcl_GetStringResult(interp), (char *) NULL);
93	}
94	return TCL_ERROR;
95	}
96	while ((end != '\0') && isspace(UCHAR(end))) { /* INTL: ISO space. */
97	end++;
98	}
99	if (*end != 0) {
100	goto badInteger;
101	}
102	*intPtr = (int) i;
103	return TCL_OK;
104	}
105
106	/*
107	*----------------------------------------------------------------------
108	*
109	* TclGetLong --
110	*
111	* Given a string, produce the corresponding long integer value.
112	* This routine is a version of Tcl_GetInt but returns a "long"
113	* instead of an "int".
114	*
115	* Results:
116	* The return value is normally TCL_OK; in this case *longPtr
117	* will be set to the long integer value equivalent to string. If
118	* string is improperly formed then TCL_ERROR is returned and
119	* an error message will be left in the interp's result if interp
120	* is non-NULL.
121	*
122	* Side effects:
123	* None.
124	*
125	*----------------------------------------------------------------------
126	*/
127
128	int
129	TclGetLong(interp, string, longPtr)
130	Tcl_Interp interp; / Interpreter used for error reporting
131	* if not NULL. */
132	char string; / String containing a (possibly signed)
133	* long integer in a form acceptable to
134	* strtoul. */
135	long longPtr; / Place to store converted long result. */
136	{
137	char end, p;
138	long i;
139
140	/*
141	* Note: don't depend on strtoul to handle sign characters; it won't
142	* in some implementations.
143	*/
144
145	errno = 0;
146	for (p = string; isspace(UCHAR(p)); p++) { / INTL: ISO space. */
147	/* Empty loop body. */
148	}
149	if (*p == '-') {
150	p++;
151	i = -(int)strtoul(p, &end, 0); /* INTL: Tcl source. */
152	} else if (*p == '+') {
153	p++;
154	i = strtoul(p, &end, 0); /* INTL: Tcl source. */
155	} else {
156	i = strtoul(p, &end, 0); /* INTL: Tcl source. */
157	}
158	if (end == p) {
159	badInteger:
160	if (interp != (Tcl_Interp *) NULL) {
161	Tcl_AppendResult(interp, "expected integer but got \"", string,
162	"\"", (char *) NULL);
163	TclCheckBadOctal(interp, string);
164	}
165	return TCL_ERROR;
166	}
167	if (errno == ERANGE) {
168	if (interp != (Tcl_Interp *) NULL) {
169	Tcl_SetResult(interp, "integer value too large to represent",
170	TCL_STATIC);
171	Tcl_SetErrorCode(interp, "ARITH", "IOVERFLOW",
172	Tcl_GetStringResult(interp), (char *) NULL);
173	}
174	return TCL_ERROR;
175	}
176	while ((end != '\0') && isspace(UCHAR(end))) { /* INTL: ISO space. */
177	end++;
178	}
179	if (*end != 0) {
180	goto badInteger;
181	}
182	*longPtr = i;
183	return TCL_OK;
184	}
185
186	/*
187	*----------------------------------------------------------------------
188	*
189	* Tcl_GetDouble --
190	*
191	* Given a string, produce the corresponding double-precision
192	* floating-point value.
193	*
194	* Results:
195	* The return value is normally TCL_OK; in this case *doublePtr
196	* will be set to the double-precision value equivalent to string.
197	* If string is improperly formed then TCL_ERROR is returned and
198	* an error message will be left in the interp's result.
199	*
200	* Side effects:
201	* None.
202	*
203	*----------------------------------------------------------------------
204	*/
205
206	int
207	Tcl_GetDouble(interp, string, doublePtr)
208	Tcl_Interp interp; / Interpreter used for error reporting. */
209	char string; / String containing a floating-point number
210	* in a form acceptable to strtod. */
211	double doublePtr; / Place to store converted result. */
212	{
213	char *end;
214	double d;
215
216	errno = 0;
217	d = strtod(string, &end); /* INTL: Tcl source. */
218	if (end == string) {
219	badDouble:
220	if (interp != (Tcl_Interp *) NULL) {
221	Tcl_AppendResult(interp,
222	"expected floating-point number but got \"",
223	string, "\"", (char *) NULL);
224	}
225	return TCL_ERROR;
226	}
227	if (errno != 0 && (d == HUGE_VAL \|\| d == -HUGE_VAL \|\| d == 0)) {
228	if (interp != (Tcl_Interp *) NULL) {
229	TclExprFloatError(interp, d);
230	}
231	return TCL_ERROR;
232	}
233	while ((end != 0) && isspace(UCHAR(end))) { /* INTL: ISO space. */
234	end++;
235	}
236	if (*end != 0) {
237	goto badDouble;
238	}
239	*doublePtr = d;
240	return TCL_OK;
241	}
242
243	/*
244	*----------------------------------------------------------------------
245	*
246	* Tcl_GetBoolean --
247	*
248	* Given a string, return a 0/1 boolean value corresponding
249	* to the string.
250	*
251	* Results:
252	* The return value is normally TCL_OK; in this case *boolPtr
253	* will be set to the 0/1 value equivalent to string. If
254	* string is improperly formed then TCL_ERROR is returned and
255	* an error message will be left in the interp's result.
256	*
257	* Side effects:
258	* None.
259	*
260	*----------------------------------------------------------------------
261	*/
262
263	int
264	Tcl_GetBoolean(interp, string, boolPtr)
265	Tcl_Interp interp; / Interpreter used for error reporting. */
266	char string; / String containing a boolean number
267	* specified either as 1/0 or true/false or
268	* yes/no. */
269	int boolPtr; / Place to store converted result, which
270	* will be 0 or 1. */
271	{
272	int i;
273	char lowerCase[10], c;
274	size_t length;
275
276	/*
277	* Convert the input string to all lower-case.
278	* INTL: This code will work on UTF strings.
279	*/
280
281	for (i = 0; i < 9; i++) {
282	c = string[i];
283	if (c == 0) {
284	break;
285	}
286	if ((c >= 'A') && (c <= 'Z')) {
287	c += (char) ('a' - 'A');
288	}
289	lowerCase[i] = c;
290	}
291	lowerCase[i] = 0;
292
293	length = strlen(lowerCase);
294	c = lowerCase[0];
295	if ((c == '0') && (lowerCase[1] == '\0')) {
296	*boolPtr = 0;
297	} else if ((c == '1') && (lowerCase[1] == '\0')) {
298	*boolPtr = 1;
299	} else if ((c == 'y') && (strncmp(lowerCase, "yes", length) == 0)) {
300	*boolPtr = 1;
301	} else if ((c == 'n') && (strncmp(lowerCase, "no", length) == 0)) {
302	*boolPtr = 0;
303	} else if ((c == 't') && (strncmp(lowerCase, "true", length) == 0)) {
304	*boolPtr = 1;
305	} else if ((c == 'f') && (strncmp(lowerCase, "false", length) == 0)) {
306	*boolPtr = 0;
307	} else if ((c == 'o') && (length >= 2)) {
308	if (strncmp(lowerCase, "on", length) == 0) {
309	*boolPtr = 1;
310	} else if (strncmp(lowerCase, "off", length) == 0) {
311	*boolPtr = 0;
312	} else {
313	goto badBoolean;
314	}
315	} else {
316	badBoolean:
317	if (interp != (Tcl_Interp *) NULL) {
318	Tcl_AppendResult(interp, "expected boolean value but got \"",
319	string, "\"", (char *) NULL);
320	}
321	return TCL_ERROR;
322	}
323	return TCL_OK;
324	}
325
326	/* End of tclget.c */