1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
|
/* str.c
*
* Copyright (C) 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1999,
* 2001, 2002, 2005 by Larry Wall and others
*
* You may distribute under the terms of either the GNU General Public
* License or the Artistic License, as specified in the README file.
*/
#include "EXTERN.h"
#include "a2p.h"
#include "util.h"
void
str_numset(register STR *str, double num)
{
str->str_nval = num;
str->str_pok = 0; /* invalidate pointer */
str->str_nok = 1; /* validate number */
}
char *
str_2ptr(register STR *str)
{
register char *s;
if (!str)
return (char *)""; /* probably safe - won't be written to */
GROWSTR(&(str->str_ptr), &(str->str_len), 24);
s = str->str_ptr;
if (str->str_nok) {
snprintf(s,str->str_len,"%.20g",str->str_nval);
while (*s) s++;
}
*s = '\0';
str->str_cur = s - str->str_ptr;
str->str_pok = 1;
#ifdef DEBUGGING
if (debug & 32)
fprintf(stderr,"0x%lx ptr(%s)\n",(unsigned long)str,str->str_ptr);
#endif
return str->str_ptr;
}
void
str_sset(STR *dstr, register STR *sstr)
{
if (!sstr)
str_nset(dstr,No,0);
else if (sstr->str_nok)
str_numset(dstr,sstr->str_nval);
else if (sstr->str_pok)
str_nset(dstr,sstr->str_ptr,sstr->str_cur);
else
str_nset(dstr,"",0);
}
void
str_nset(register STR *str, register const char *ptr, register int len)
{
GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
memcpy(str->str_ptr,ptr,len);
str->str_cur = len;
*(str->str_ptr+str->str_cur) = '\0';
str->str_nok = 0; /* invalidate number */
str->str_pok = 1; /* validate pointer */
}
void
str_set(register STR *str, register const char *ptr)
{
register int len;
if (!ptr)
ptr = "";
len = strlen(ptr);
GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
memcpy(str->str_ptr,ptr,len+1);
str->str_cur = len;
str->str_nok = 0; /* invalidate number */
str->str_pok = 1; /* validate pointer */
}
void
str_ncat(register STR *str, register const char *ptr, register int len)
{
if (!(str->str_pok))
str_2ptr(str);
GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
memcpy(str->str_ptr+str->str_cur, ptr, len);
str->str_cur += len;
*(str->str_ptr+str->str_cur) = '\0';
str->str_nok = 0; /* invalidate number */
str->str_pok = 1; /* validate pointer */
}
void
str_scat(STR *dstr, register STR *sstr)
{
if (!(sstr->str_pok))
str_2ptr(sstr);
if (sstr)
str_ncat(dstr,sstr->str_ptr,sstr->str_cur);
}
void
str_cat(register STR *str, register const char *ptr)
{
register int len;
if (!ptr)
return;
if (!(str->str_pok))
str_2ptr(str);
len = strlen(ptr);
GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + len + 1);
memcpy(str->str_ptr+str->str_cur, ptr, len+1);
str->str_cur += len;
str->str_nok = 0; /* invalidate number */
str->str_pok = 1; /* validate pointer */
}
STR *
str_new(int len)
{
register STR *str;
if (freestrroot) {
str = freestrroot;
freestrroot = str->str_link.str_next;
}
else {
str = (STR *) safemalloc(sizeof(STR));
memset((char*)str,0,sizeof(STR));
}
if (len)
GROWSTR(&(str->str_ptr), &(str->str_len), len + 1);
return str;
}
/* make str point to what nstr did */
void
str_free(register STR *str)
{
if (!str)
return;
if (str->str_len)
str->str_ptr[0] = '\0';
str->str_cur = 0;
str->str_nok = 0;
str->str_pok = 0;
str->str_link.str_next = freestrroot;
freestrroot = str;
}
int
str_len(register STR *str)
{
if (!str)
return 0;
if (!(str->str_pok))
str_2ptr(str);
if (str->str_len)
return str->str_cur;
else
return 0;
}
char *
str_gets(register STR *str, register FILE *fp)
{
#if defined(USE_STDIO_PTR) && defined(STDIO_PTR_LVALUE) && defined(STDIO_CNT_LVALUE)
/* Here is some breathtakingly efficient cheating */
register char *bp; /* we're going to steal some values */
register int cnt; /* from the stdio struct and put EVERYTHING */
register STDCHAR *ptr; /* in the innermost loop into registers */
register char newline = '\n'; /* (assuming at least 6 registers) */
int i;
int bpx;
#if defined(VMS)
/* An ungetc()d char is handled separately from the regular
* buffer, so we getc() it back out and stuff it in the buffer.
*/
i = getc(fp);
if (i == EOF) return NULL;
*(--((*fp)->_ptr)) = (unsigned char) i;
(*fp)->_cnt++;
#endif
cnt = FILE_cnt(fp); /* get count into register */
str->str_nok = 0; /* invalidate number */
str->str_pok = 1; /* validate pointer */
if (str->str_len <= cnt) /* make sure we have the room */
GROWSTR(&(str->str_ptr), &(str->str_len), cnt+1);
bp = str->str_ptr; /* move these two too to registers */
ptr = (STDCHAR*)FILE_ptr(fp);
for (;;) {
while (--cnt >= 0) {
if ((*bp++ = *ptr++) == newline) {
if (bp <= str->str_ptr || bp[-2] != '\\')
goto thats_all_folks;
else {
line++;
bp -= 2;
}
}
}
FILE_cnt(fp) = cnt; /* deregisterize cnt and ptr */
FILE_ptr(fp) = (void*)ptr; /* LHS STDCHAR* cast non-portable */
i = getc(fp); /* get more characters */
cnt = FILE_cnt(fp);
ptr = (STDCHAR*)FILE_ptr(fp); /* reregisterize cnt and ptr */
bpx = bp - str->str_ptr; /* prepare for possible relocation */
GROWSTR(&(str->str_ptr), &(str->str_len), str->str_cur + cnt + 1);
bp = str->str_ptr + bpx; /* reconstitute our pointer */
if (i == newline) { /* all done for now? */
*bp++ = i;
goto thats_all_folks;
}
else if (i == EOF) /* all done for ever? */
goto thats_all_folks;
*bp++ = i; /* now go back to screaming loop */
}
thats_all_folks:
FILE_cnt(fp) = cnt; /* put these back or we're in trouble */
FILE_ptr(fp) = (void*)ptr; /* LHS STDCHAR* cast non-portable */
*bp = '\0';
str->str_cur = bp - str->str_ptr; /* set length */
#else /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
/* The big, slow, and stupid way */
static char buf[4192];
if (fgets(buf, sizeof buf, fp) != NULL)
str_set(str, buf);
else
str_set(str, No);
#endif /* USE_STDIO_PTR && STDIO_PTR_LVALUE && STDIO_CNT_LVALUE */
return str->str_cur ? str->str_ptr : NULL;
}
STR *
str_make(const char *s)
{
register STR *str = str_new(0);
str_set(str,s);
return str;
}
|
