libs/libgroff/string.cpp

28 static char *salloc(int len, int *sizep);
30 static char *sfree_alloc(char *ptr, int size, int len, int *sizep);
33 static char *salloc(int len, int *sizep)
35   if (len == 0) {
40     return new char[*sizep = len*2];
48 static char *sfree_alloc(char *ptr, int oldsz, int len, int *sizep)
50   if (oldsz >= len) {
55   if (len == 0) {
60     return new char[*sizep = len*2];
83 string::string() : ptr(0), len(0), sz(0)
87 string::string(const char *p, int n) : len(n)
98     len = 0;
103     len = strlen(p);
104     ptr = salloc(len, &sz);
105     memcpy(ptr, p, len);
109 string::string(char c) : len(1)
115 string::string(const string &s) : len(s.len)
117   ptr = salloc(len, &sz);
118   if (len != 0)
119     memcpy(ptr, s.ptr, len);
129   ptr = sfree_alloc(ptr, sz, s.len, &sz);
130   len = s.len;
131   if (len != 0)
132     memcpy(ptr, s.ptr, len);
139     sfree(ptr, len);
140     len = 0;
147     len = slen;
148     memcpy(ptr, p, len);
156   len = 1;
165   len = s.len;
168   s.len = 0;
174   ptr = srealloc(ptr, sz, len, len + 1, &sz);
181     int newlen = len + n;
183       ptr = srealloc(ptr, sz, len, newlen, &sz);
184     memcpy(ptr + len, p, n);
185     len = newlen;
192   if (s.len != 0) {
193     int newlen = len + s.len;
195       ptr = srealloc(ptr, sz, len, newlen, &sz);
196     memcpy(ptr + len, s.ptr, s.len);
197     len = newlen;
205     int newlen = len + n;
207       ptr = srealloc(ptr, sz, len, newlen, &sz);
208     memcpy(ptr + len, p, n);
209     len = newlen;
216   len = n1 + n2;
217   if (len == 0) {
222     ptr = salloc(len, &sz);
235   return (s1.len <= s2.len
236 	  ? s1.len == 0 || memcmp(s1.ptr, s2.ptr, s1.len) <= 0
237 	  : s2.len != 0 && memcmp(s1.ptr, s2.ptr, s2.len) < 0);
242   return (s1.len < s2.len
243 	  ? s1.len == 0 || memcmp(s1.ptr, s2.ptr, s1.len) <= 0
244 	  : s2.len != 0 && memcmp(s1.ptr, s2.ptr, s2.len) < 0);
249   return (s1.len >= s2.len
250 	  ? s2.len == 0 || memcmp(s1.ptr, s2.ptr, s2.len) >= 0
251 	  : s1.len != 0 && memcmp(s1.ptr, s2.ptr, s1.len) > 0);
256   return (s1.len > s2.len
257 	  ? s2.len == 0 || memcmp(s1.ptr, s2.ptr, s2.len) >= 0
258 	  : s1.len != 0 && memcmp(s1.ptr, s2.ptr, s1.len) > 0);
265     ptr = srealloc(ptr, sz, len, i, &sz);
266   len = i;
271   len = 0;
276   char *p = ptr ? (char *)memchr(ptr, c, len) : NULL;
285   int n = len;
302   int l = len - 1;
311   if (len - 1 != l) {
313       len = l + 1;
314       char *tmp = new char[len];
315       memcpy(tmp, p, len);
320       len = 0;
331   int len = s.length();
333   for (int i = 0; i < len; i++)