1 /* $Id: buff.c 3483 2007-05-07 11:18:56Z mquinson $ */
3 /* strbuff -- string buffers */
5 /* Copyright (c) 2007 Martin Quinson. */
6 /* All rights reserved. */
8 /* This program is free software; you can redistribute it and/or modify it
9 * under the terms of the license (GNU LGPL) which comes with this package. */
11 /* specific to Borland Compiler */
16 #include "xbt/strbuff.h"
18 #define minimal_increment 512
20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(strbuff,xbt,"String buffers");
26 void xbt_strbuff_empty(xbt_strbuff_t b) {
31 xbt_strbuff_t xbt_strbuff_new(void) {
32 xbt_strbuff_t res=malloc(sizeof(s_xbt_strbuff_t));
33 res->data=malloc(512);
35 xbt_strbuff_empty(res);
38 /** @brief creates a new string buffer containing the provided string
40 * Beware, we store the ctn directly, not a copy of it
42 xbt_strbuff_t xbt_strbuff_from(char *ctn) {
43 xbt_strbuff_t res=malloc(sizeof(s_xbt_strbuff_t));
45 res->used=res->size=strlen(ctn);
48 /** @brief frees only the container without touching to the contained string */
49 void xbt_strbuff_free_container(xbt_strbuff_t b) {
52 /** @brief frees the buffer and its content */
53 void xbt_strbuff_free(xbt_strbuff_t b) {
60 void xbt_strbuff_append(xbt_strbuff_t b, const char *toadd) {
65 THROW0(arg_error,0,"Asked to append stuff to NULL buffer");
67 addlen = strlen(toadd);
68 needed_space=b->used+addlen+1;
70 if (needed_space > b->size) {
71 b->data = realloc(b->data, MAX(minimal_increment+b->used, needed_space));
72 b->size = MAX(minimal_increment+b->used, needed_space);
74 strcpy(b->data+b->used, toadd);
77 void xbt_strbuff_chomp(xbt_strbuff_t b) {
78 while (b->data[b->used] == '\n') {
79 b->data[b->used] = '\0';
85 void xbt_strbuff_trim(xbt_strbuff_t b) {
86 xbt_str_trim(b->data," ");
87 b->used = strlen(b->data);
89 /** @brief Replaces a set of variables by their values
91 * @param b buffer to modify
92 * @param patterns variables to substitute in the buffer
94 * Both '$toto' and '${toto}' are valid (and the two writing are equivalent).
96 * If the variable name contains spaces, use the brace version (ie, ${toto tutu})
98 void xbt_strbuff_varsubst(xbt_strbuff_t b, xbt_dict_t patterns) {
100 char *beg, *end; /* pointers around the parsed chunk */
101 int in_simple_quote=0, in_double_quote=0;
104 if (b->data[0] == '\0')
112 /* Protected char; pass the protection */
115 THROW0(arg_error,0,"String ends with \\");
119 if (!in_double_quote) {
120 /* simple quote not protected by double ones, note it */
121 in_simple_quote = !in_simple_quote;
125 if (!in_simple_quote) {
126 /* double quote protected by simple ones, note it */
127 in_double_quote = !in_double_quote;
132 if (!in_simple_quote) {
133 /* Go for the substitution. First search the variable name */
134 char *beg_var,*end_var; /* variable name boundary */
135 char *beg_subst, *end_subst=NULL; /* where value should be written to */
136 char *value, *default_value=NULL;
141 if (*(++end) == '{') {
142 /* the variable name is enclosed in braces. */
144 /* Search name's end */
146 while (*end_var != '\0' && *end_var != '}') {
147 if (*end_var == ':') {
148 /* damn, we have a default value */
150 while (*p != '\0' && *p != '}')
153 THROW0(arg_error,0,"Variable default value not terminated ('}' missing)");
155 default_value = xbt_malloc(p-end_var);
156 memcpy(default_value, end_var+1, p-end_var-1);
157 default_value[p-end_var-1] = '\0';
159 end_subst = p+1; /* eat '}' */
165 if (*end_var == '\0')
166 THROW0(arg_error,0,"Variable name not terminated ('}' missing)");
168 if (!end_subst) /* already set if there's a default value */
169 end_subst = end_var+1; /* also kill the } in the name */
171 if (end_var == beg_var)
172 THROW0(arg_error,0,"Variable name empty (${} is not valid)");
176 /* name given directly */
179 while (*end_var != '\0' && *end_var != ' ' && *end_var != '\t' && *end_var != '\n')
182 if (end_var == beg_var)
183 THROW0(arg_error,0,"Variable name empty ($ is not valid)");
185 // DEBUG1("End_var = %s",end_var);
187 /* ok, we now have the variable name. Search the dictionary for the substituted value */
188 value = xbt_dict_get_or_null_ext(patterns,beg_var,end_var-beg_var);
189 // DEBUG4("Search for %.*s, found %s (default value = %s)\n",
190 // end_var-beg_var,beg_var,
191 // (value?value:"NULL"),
192 // (default_value?default_value:"NULL"));
195 value = xbt_strdup(value);
197 value = xbt_strdup(default_value);
200 value = xbt_strdup("");
202 /* En route for the actual substitution */
203 val_len = strlen(value);
204 // DEBUG2("val_len = %d, key_len=%d",val_len,end_subst-beg_subst);
205 if (val_len <= end_subst-beg_subst) {
206 /* enough room to do the substitute in place */
207 // INFO3("Substitute '%s' with '%s' for %d chars",beg_subst,value, val_len);
208 memmove(beg_subst,value,val_len); /* substitute */
209 // INFO3("Substitute '%s' with '%s' for %d chars",beg_subst+val_len,end_subst, b->used-(end_subst-b->data)+1);
210 memmove(beg_subst+val_len,end_subst, b->used-(end_subst - b->data)+1); /* move the end of the string closer */
211 b->used -= end_subst-beg_subst-val_len; /* update string buffer used size */
213 /* we have to extend the data area */
214 int tooshort = val_len-(end_subst-beg_subst) +1/*don't forget \0*/;
215 int newused = b->used + tooshort;
216 // DEBUG2("Too short (by %d chars; %d chars left in area)",val_len- (end_subst-beg_subst), b->size - b->used);
217 if (newused > b->size) {
218 /* We have to realloc the data area before (because b->size is too small). We have to update our pointers, too */
219 char *newdata = realloc(b->data, b->used + MAX(minimal_increment,tooshort));
220 int offset = newdata - b->data;
222 b->size = b->used + MAX(minimal_increment,tooshort);
226 memmove(beg_subst+val_len,end_subst, b->used-(end_subst - b->data)+1); /* move the end of the string a bit further */
227 memmove(beg_subst,value,val_len); /* substitute */
244 #include "xbt/strbuff.h"
246 /* buffstr have 512 chars by default. Adding 1000 chars like this will force a resize, allowing us to test that b->used and b->size are consistent */
247 #define force_resize \
248 "1.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
249 "2.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
250 "3.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
251 "4.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
252 "5.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
253 "6.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
254 "7.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
255 "8.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
256 "9.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
257 "0.........1.........2.........3.........4.........5.........6.........7.........8.........9........."
259 static void mytest(const char *name, const char *input, const char *patterns, const char *expected) {
260 xbt_dynar_t dyn_patterns; /* splited string */
261 xbt_dict_t p; /* patterns */
262 unsigned int cpt; char *str; /*foreach*/
263 xbt_strbuff_t sb; /* what we test */
267 dyn_patterns=xbt_str_split(patterns," ");
268 xbt_dynar_foreach(dyn_patterns,cpt,str) {
269 xbt_dynar_t keyvals = xbt_str_split(str,"=");
270 char *key = xbt_dynar_get_as(keyvals,0,char*);
271 char *val = xbt_dynar_get_as(keyvals,1,char*);
272 xbt_str_subst(key,'_',' ',0); // to put space in names without breaking the enclosing dynar_foreach
273 xbt_dict_set(p,key,xbt_strdup(val),free);
274 xbt_dynar_free(&keyvals);
276 xbt_dynar_free(&dyn_patterns);
277 sb = xbt_strbuff_new();
278 xbt_strbuff_append(sb,input);
279 xbt_strbuff_varsubst(sb, p);
281 xbt_test_assert4(!strcmp(sb->data,expected),
282 "Input (%s) with patterns (%s) leads to (%s) instead of (%s)",
283 input,patterns,sb->data,expected);
284 xbt_strbuff_free(sb);
287 XBT_TEST_SUITE("xbt_strbuff","String Buffers");
288 XBT_TEST_UNIT("xbt_strbuff_substitute",test_strbuff_substitute, "test the function xbt_strbuff_substitute") {
289 mytest("Empty", "", "", "");
291 mytest("Value shorter, no braces, only variable", "$tutu", "tutu=t", "t");
292 mytest("Value shorter, braces, only variable", "${tutu}", "tutu=t", "t");
293 mytest("Value shorter, no braces, data after", "$tutu toto", "tutu=t", "t toto");
294 mytest("Value shorter, braces, data after", "${tutu} toto", "tutu=t", "t toto");
295 mytest("Value shorter, no braces, data before", "toto $tutu", "tutu=t", "toto t");
296 mytest("Value shorter, braces, data before", "toto ${tutu}", "tutu=t", "toto t");
297 mytest("Value shorter, no braces, data before and after", "toto $tutu tata", "tutu=t", "toto t tata");
298 mytest("Value shorter, braces, data before and after", "toto ${tutu} tata", "tutu=t", "toto t tata");
300 mytest("Value as long, no braces, only variable", "$tutu", "tutu=12345", "12345");
301 mytest("Value as long, braces, only variable", "${tutu}", "tutu=1234567", "1234567");
302 mytest("Value as long, no braces, data after", "$tutu toto", "tutu=12345", "12345 toto");
303 mytest("Value as long, braces, data after", "${tutu} toto", "tutu=1234567", "1234567 toto");
304 mytest("Value as long, no braces, data before", "toto $tutu", "tutu=12345", "toto 12345");
305 mytest("Value as long, braces, data before", "toto ${tutu}", "tutu=1234567", "toto 1234567");
306 mytest("Value as long, no braces, data before and after", "toto $tutu tata", "tutu=12345", "toto 12345 tata");
307 mytest("Value as long, braces, data before and after", "toto ${tutu} tata", "tutu=1234567", "toto 1234567 tata");
309 mytest("Value longer, no braces, only variable", "$t", "t=tututu", "tututu");
310 mytest("Value longer, braces, only variable", "${t}", "t=tututu", "tututu");
311 mytest("Value longer, no braces, data after", "$t toto", "t=tututu", "tututu toto");
312 mytest("Value longer, braces, data after", "${t} toto", "t=tututu", "tututu toto");
313 mytest("Value longer, no braces, data before", "toto $t", "t=tututu", "toto tututu");
314 mytest("Value longer, braces, data before", "toto ${t}", "t=tututu", "toto tututu");
315 mytest("Value longer, no braces, data before and after", "toto $t tata", "t=tututu", "toto tututu tata");
316 mytest("Value longer, braces, data before and after", "toto ${t} tata", "t=tututu", "toto tututu tata");
318 mytest("Value much longer, no braces, only variable", "$t", "t=" force_resize, force_resize);
319 mytest("Value much longer, braces, only variable", "${t}", "t=" force_resize, force_resize);
320 mytest("Value much longer, no braces, data after", "$t toto", "t=" force_resize, force_resize " toto");
321 mytest("Value much longer, braces, data after", "${t} toto", "t=" force_resize, force_resize " toto");
322 mytest("Value much longer, no braces, data before", "toto $t", "t=" force_resize, "toto " force_resize);
323 mytest("Value much longer, braces, data before", "toto ${t}", "t=" force_resize, "toto " force_resize);
324 mytest("Value much longer, no braces, data before and after", "toto $t tata", "t=" force_resize, "toto " force_resize " tata");
325 mytest("Value much longer, braces, data before and after", "toto ${t} tata", "t=" force_resize, "toto " force_resize " tata");
327 mytest("Escaped $", "\\$tutu", "tutu=t", "\\$tutu");
328 mytest("Space in var name (with braces)", "${tu ti}", "tu_ti=t", "t");
330 // Commented: I'm too lazy to do a memmove in var name to remove the backslash after use.
331 // Users should use braces.
332 // mytest("Escaped space in var name", "$tu\\ ti", "tu_ti=t", "t");
334 mytest("Default value", "${t:toto}", "", "toto");
335 mytest("Useless default value (variable already defined)", "${t:toto}", "t=TRUC", "TRUC");
339 #endif /* SIMGRID_TEST */