1 |
/* Concatenate variable number of strings. |
/* Concatenate variable number of strings. |
2 |
Copyright (C) 1991, 1994 Free Software Foundation, Inc. |
Copyright (C) 1991, 1994, 2001 Free Software Foundation, Inc. |
3 |
Written by Fred Fish @ Cygnus Support |
Written by Fred Fish @ Cygnus Support |
4 |
|
|
5 |
This file is part of the libiberty library. |
This file is part of the libiberty library. |
21 |
|
|
22 |
/* |
/* |
23 |
|
|
24 |
NAME |
@deftypefn Extension char* concat (const char *@var{s1}, const char *@var{s2}, @dots{}, @code{NULL}) |
25 |
|
|
26 |
concat -- concatenate a variable number of strings |
Concatenate zero or more of strings and return the result in freshly |
27 |
|
@code{xmalloc}ed memory. Returns @code{NULL} if insufficient memory is |
28 |
|
available. The argument list is terminated by the first @code{NULL} |
29 |
|
pointer encountered. Pointers to empty strings are ignored. |
30 |
|
|
31 |
SYNOPSIS |
@end deftypefn |
|
|
|
|
#include <varargs.h> |
|
|
|
|
|
char *concat (s1, s2, s3, ..., NULL) |
|
|
|
|
|
DESCRIPTION |
|
|
|
|
|
Concatenate a variable number of strings and return the result |
|
|
in freshly malloc'd memory. |
|
|
|
|
|
Returns NULL if insufficient memory is available. The argument |
|
|
list is terminated by the first NULL pointer encountered. Pointers |
|
|
to empty strings are ignored. |
|
32 |
|
|
33 |
NOTES |
NOTES |
34 |
|
|
40 |
deal with low memory situations itself, it should supply an xmalloc |
deal with low memory situations itself, it should supply an xmalloc |
41 |
that just directly invokes malloc and blindly returns whatever |
that just directly invokes malloc and blindly returns whatever |
42 |
malloc returns. |
malloc returns. |
43 |
|
|
44 |
*/ |
*/ |
45 |
|
|
46 |
|
|
47 |
|
#ifdef HAVE_CONFIG_H |
48 |
|
#include "config.h" |
49 |
|
#endif |
50 |
#include "ansidecl.h" |
#include "ansidecl.h" |
51 |
#include "libiberty.h" |
#include "libiberty.h" |
52 |
|
#include <sys/types.h> /* size_t */ |
53 |
|
|
54 |
#ifdef ANSI_PROTOTYPES |
#ifdef ANSI_PROTOTYPES |
55 |
#include <stdarg.h> |
#include <stdarg.h> |
57 |
#include <varargs.h> |
#include <varargs.h> |
58 |
#endif |
#endif |
59 |
|
|
60 |
#ifdef __STDC__ |
# if HAVE_STRING_H |
61 |
#include <stddef.h> |
# include <string.h> |
62 |
extern size_t strlen (const char *s); |
# else |
63 |
#else |
# if HAVE_STRINGS_H |
64 |
extern int strlen (); |
# include <strings.h> |
65 |
#endif |
# endif |
66 |
|
# endif |
67 |
|
|
68 |
|
#if HAVE_STDLIB_H |
69 |
|
#include <stdlib.h> |
70 |
|
#endif |
71 |
|
|
72 |
|
static inline unsigned long vconcat_length PARAMS ((const char *, va_list)); |
73 |
|
static inline unsigned long |
74 |
|
vconcat_length (first, args) |
75 |
|
const char *first; |
76 |
|
va_list args; |
77 |
|
{ |
78 |
|
unsigned long length = 0; |
79 |
|
const char *arg; |
80 |
|
|
81 |
#define NULLP (char *)0 |
for (arg = first; arg ; arg = va_arg (args, const char *)) |
82 |
|
length += strlen (arg); |
83 |
|
|
84 |
|
return length; |
85 |
|
} |
86 |
|
|
87 |
|
static inline char *vconcat_copy PARAMS ((char *, const char *, va_list)); |
88 |
|
static inline char * |
89 |
|
vconcat_copy (dst, first, args) |
90 |
|
char *dst; |
91 |
|
const char *first; |
92 |
|
va_list args; |
93 |
|
{ |
94 |
|
char *end = dst; |
95 |
|
const char *arg; |
96 |
|
|
97 |
|
for (arg = first; arg ; arg = va_arg (args, const char *)) |
98 |
|
{ |
99 |
|
unsigned long length = strlen (arg); |
100 |
|
memcpy (end, arg, length); |
101 |
|
end += length; |
102 |
|
} |
103 |
|
*end = '\000'; |
104 |
|
|
105 |
|
return dst; |
106 |
|
} |
107 |
|
|
108 |
|
/* @undocumented concat_length */ |
109 |
|
|
110 |
|
unsigned long |
111 |
|
concat_length VPARAMS ((const char *first, ...)) |
112 |
|
{ |
113 |
|
unsigned long length; |
114 |
|
|
115 |
|
VA_OPEN (args, first); |
116 |
|
VA_FIXEDARG (args, const char *, first); |
117 |
|
length = vconcat_length (first, args); |
118 |
|
VA_CLOSE (args); |
119 |
|
|
120 |
|
return length; |
121 |
|
} |
122 |
|
|
123 |
|
/* @undocumented concat_copy */ |
124 |
|
|
|
/* VARARGS */ |
|
|
#ifdef ANSI_PROTOTYPES |
|
125 |
char * |
char * |
126 |
concat (const char *first, ...) |
concat_copy VPARAMS ((char *dst, const char *first, ...)) |
127 |
#else |
{ |
128 |
|
char *save_dst; |
129 |
|
|
130 |
|
VA_OPEN (args, first); |
131 |
|
VA_FIXEDARG (args, char *, dst); |
132 |
|
VA_FIXEDARG (args, const char *, first); |
133 |
|
vconcat_copy (dst, first, args); |
134 |
|
save_dst = dst; /* With K&R C, dst goes out of scope here. */ |
135 |
|
VA_CLOSE (args); |
136 |
|
|
137 |
|
return save_dst; |
138 |
|
} |
139 |
|
|
140 |
|
char *libiberty_concat_ptr; |
141 |
|
|
142 |
|
/* @undocumented concat_copy2 */ |
143 |
|
|
144 |
char * |
char * |
145 |
concat (va_alist) |
concat_copy2 VPARAMS ((const char *first, ...)) |
|
va_dcl |
|
|
#endif |
|
146 |
{ |
{ |
147 |
register int length; |
VA_OPEN (args, first); |
148 |
register char *newstr; |
VA_FIXEDARG (args, const char *, first); |
149 |
register char *end; |
vconcat_copy (libiberty_concat_ptr, first, args); |
150 |
register const char *arg; |
VA_CLOSE (args); |
|
va_list args; |
|
|
#ifndef ANSI_PROTOTYPES |
|
|
const char *first; |
|
|
#endif |
|
151 |
|
|
152 |
/* First compute the size of the result and get sufficient memory. */ |
return libiberty_concat_ptr; |
153 |
|
} |
154 |
|
|
155 |
#ifdef ANSI_PROTOTYPES |
char * |
156 |
va_start (args, first); |
concat VPARAMS ((const char *first, ...)) |
157 |
#else |
{ |
158 |
va_start (args); |
char *newstr; |
|
first = va_arg (args, const char *); |
|
|
#endif |
|
159 |
|
|
160 |
if (first == NULLP) |
/* First compute the size of the result and get sufficient memory. */ |
161 |
length = 0; |
VA_OPEN (args, first); |
162 |
else |
VA_FIXEDARG (args, const char *, first); |
163 |
{ |
newstr = (char *) xmalloc (vconcat_length (first, args) + 1); |
164 |
length = strlen (first); |
VA_CLOSE (args); |
|
while ((arg = va_arg (args, const char *)) != NULLP) |
|
|
{ |
|
|
length += strlen (arg); |
|
|
} |
|
|
} |
|
|
newstr = (char *) xmalloc (length + 1); |
|
|
va_end (args); |
|
165 |
|
|
166 |
/* Now copy the individual pieces to the result string. */ |
/* Now copy the individual pieces to the result string. */ |
167 |
|
VA_OPEN (args, first); |
168 |
|
VA_FIXEDARG (args, const char *, first); |
169 |
|
vconcat_copy (newstr, first, args); |
170 |
|
VA_CLOSE (args); |
171 |
|
|
172 |
if (newstr != NULLP) |
return newstr; |
173 |
{ |
} |
174 |
#ifdef ANSI_PROTOTYPES |
|
175 |
va_start (args, first); |
/* |
176 |
#else |
|
177 |
va_start (args); |
@deftypefn Extension char* reconcat (char *@var{optr}, const char *@var{s1}, @dots{}, @code{NULL}) |
178 |
first = va_arg (args, const char *); |
|
179 |
#endif |
Same as @code{concat}, except that if @var{optr} is not @code{NULL} it |
180 |
end = newstr; |
is freed after the string is created. This is intended to be useful |
181 |
if (first != NULLP) |
when you're extending an existing string or building up a string in a |
182 |
{ |
loop: |
183 |
arg = first; |
|
184 |
while (*arg) |
@example |
185 |
{ |
str = reconcat (str, "pre-", str, NULL); |
186 |
*end++ = *arg++; |
@end example |
187 |
} |
|
188 |
while ((arg = va_arg (args, const char *)) != NULLP) |
@end deftypefn |
189 |
{ |
|
190 |
while (*arg) |
*/ |
191 |
{ |
|
192 |
*end++ = *arg++; |
char * |
193 |
} |
reconcat VPARAMS ((char *optr, const char *first, ...)) |
194 |
} |
{ |
195 |
} |
char *newstr; |
|
*end = '\000'; |
|
|
va_end (args); |
|
|
} |
|
196 |
|
|
197 |
return (newstr); |
/* First compute the size of the result and get sufficient memory. */ |
198 |
|
VA_OPEN (args, first); |
199 |
|
VA_FIXEDARG (args, char *, optr); |
200 |
|
VA_FIXEDARG (args, const char *, first); |
201 |
|
newstr = (char *) xmalloc (vconcat_length (first, args) + 1); |
202 |
|
VA_CLOSE (args); |
203 |
|
|
204 |
|
/* Now copy the individual pieces to the result string. */ |
205 |
|
VA_OPEN (args, first); |
206 |
|
VA_FIXEDARG (args, char *, optr); |
207 |
|
VA_FIXEDARG (args, const char *, first); |
208 |
|
vconcat_copy (newstr, first, args); |
209 |
|
if (optr) /* Done before VA_CLOSE so optr stays in scope for K&R C. */ |
210 |
|
free (optr); |
211 |
|
VA_CLOSE (args); |
212 |
|
|
213 |
|
return newstr; |
214 |
} |
} |
215 |
|
|
216 |
#ifdef MAIN |
#ifdef MAIN |
217 |
|
#define NULLP (char *)0 |
218 |
|
|
219 |
/* Simple little test driver. */ |
/* Simple little test driver. */ |
220 |
|
|