1 /* $Id: buff.c 3483 2007-05-07 11:18:56Z mquinson $ */
3 /* strbuff -- string buffers */
5 /* Copyright (c) 2007, 2008, 2009, 2010. The SimGrid Team.
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 XBT_INLINE void xbt_strbuff_empty(xbt_strbuff_t b)
32 xbt_strbuff_t xbt_strbuff_new(void)
34 xbt_strbuff_t res = malloc(sizeof(s_xbt_strbuff_t));
35 res->data = malloc(512);
37 xbt_strbuff_empty(res);
41 /** @brief creates a new string buffer containing the provided string
43 * Beware, we store the ctn directly, not a copy of it
45 XBT_INLINE xbt_strbuff_t xbt_strbuff_new_from(char *ctn)
47 xbt_strbuff_t res = malloc(sizeof(s_xbt_strbuff_t));
49 res->used = res->size = strlen(ctn);
53 /** @brief frees only the container without touching to the contained string */
54 XBT_INLINE void xbt_strbuff_free_container(xbt_strbuff_t b)
59 /** @brief frees the buffer and its content */
60 XBT_INLINE void xbt_strbuff_free(xbt_strbuff_t b)
69 void xbt_strbuff_append(xbt_strbuff_t b, const char *toadd)
75 THROWF(arg_error, 0, "Asked to append stuff to NULL buffer");
77 addlen = strlen(toadd);
78 needed_space = b->used + addlen + 1;
80 if (needed_space > b->size) {
82 realloc(b->data, MAX(minimal_increment + b->used, needed_space));
83 b->size = MAX(minimal_increment + b->used, needed_space);
85 strcpy(b->data + b->used, toadd);
89 XBT_INLINE void xbt_strbuff_chomp(xbt_strbuff_t b)
91 while (b->used && b->data[b->used - 1] == '\n') {
93 b->data[b->used] = '\0';
97 XBT_INLINE void xbt_strbuff_trim(xbt_strbuff_t b)
99 xbt_str_trim(b->data, " ");
100 b->used = strlen(b->data);
103 /** @brief Replaces a set of variables by their values
105 * @param b buffer to modify
106 * @param patterns variables to substitute in the buffer
108 * Both '$toto' and '${toto}' are valid (and the two writing are equivalent).
110 * If the variable name contains spaces, use the brace version (ie, ${toto tutu})
112 * You can provide a default value to use if the variable is not set in the dict by using
113 * '${var:=default}' or '${var:-default}'. These two forms are equivalent, even if they
114 * shouldn't to respect the shell standard (:= form should set the value in the dict,
115 * but does not) (BUG).
117 void xbt_strbuff_varsubst(xbt_strbuff_t b, xbt_dict_t patterns)
120 char *end; /* pointers around the parsed chunk */
121 int in_simple_quote = 0, in_double_quote = 0;
124 if (b->data[0] == '\0')
131 /* Protected char; pass the protection */
134 THROWF(arg_error, 0, "String ends with \\");
138 if (!in_double_quote) {
139 /* simple quote not protected by double ones, note it */
140 in_simple_quote = !in_simple_quote;
144 if (!in_simple_quote) {
145 /* double quote protected by simple ones, note it */
146 in_double_quote = !in_double_quote;
151 if (!in_simple_quote) {
152 /* Go for the substitution. First search the variable name */
153 char *beg_var, *end_var; /* variable name boundary */
154 char *beg_subst, *end_subst = NULL; /* where value should be written to */
155 char *value, *default_value = NULL;
160 if (*(++end) == '{') {
161 /* the variable name is enclosed in braces. */
163 /* Search name's end */
165 while (*end_var != '\0' && *end_var != '}') {
166 /* TODO: we do not respect the standard for ":=", we should set this value in the dict */
168 && ((*(end_var + 1) == '=') || (*(end_var + 1) == '-'))) {
169 /* damn, we have a default value */
170 char *p = end_var + 1;
171 while (*p != '\0' && *p != '}')
175 "Variable default value not terminated ('}' missing)");
177 default_value = xbt_malloc(p - end_var - 1);
178 memcpy(default_value, end_var + 2, p - end_var - 2);
179 default_value[p - end_var - 2] = '\0';
181 end_subst = p + 1; /* eat '}' */
187 if (*end_var == '\0')
189 "Variable name not terminated ('}' missing)");
191 if (!end_subst) /* already set if there's a default value */
192 end_subst = end_var + 1; /* also kill the } in the name */
194 if (end_var == beg_var)
195 THROWF(arg_error, 0, "Variable name empty (${} is not valid)");
199 /* name given directly */
202 while (*end_var != '\0' && *end_var != ' ' && *end_var != '\t'
206 if (end_var == beg_var)
207 THROWF(arg_error, 0, "Variable name empty ($ is not valid)");
209 /* XBT_DEBUG("var='%.*s'; subst='%.*s'; End_var = '%s'",
210 end_var-beg_var,beg_var,
211 end_subst-beg_subst,beg_subst,
214 /* ok, we now have the variable name. Search the dictionary for the substituted value */
216 xbt_dict_get_or_null_ext(patterns, beg_var, end_var - beg_var);
217 /* XBT_DEBUG("Deal with '%s'",b->data);
218 XBT_DEBUG("Search for %.*s, found %s (default value = %s)\n",
219 end_var-beg_var,beg_var,
220 (value?value:"(no value)"),
221 (default_value?default_value:"(no value)"));*/
224 value = xbt_strdup(value);
225 else if (default_value)
226 value = xbt_strdup(default_value);
228 value = xbt_strdup("");
230 /* En route for the actual substitution */
231 val_len = strlen(value);
232 // XBT_DEBUG("val_len = %d, key_len=%d",val_len,end_subst-beg_subst);
233 if (val_len <= end_subst - beg_subst) {
234 /* enough room to do the substitute in place */
235 // XBT_DEBUG("Substitute key name by its value: ie '%.*s' by '%.*s'",end_subst-beg_subst,beg_subst,val_len,value);
236 memmove(beg_subst, value, val_len); /* substitute */
237 // XBT_DEBUG("String is now: '%s'",b->data);
238 /* XBT_DEBUG("Move end of string closer (%d chars moved) :\n-'%.*s%.*s'\n+'%.*s%s'",
239 b->used - (end_subst - b->data) + 1,
240 beg_subst-b->data,b->data,
241 b->used-(end_subst-b->data)+1,beg_subst+val_len,
242 beg_subst-b->data,b->data,
244 memmove(beg_subst + val_len, end_subst, b->used - (end_subst - b->data) + 1); /* move the end of the string closer */
245 // XBT_DEBUG("String is now: '%s'",b->data);
246 end = beg_subst + val_len; /* update the currently explored char in the overall loop */
247 // XBT_DEBUG("end of substituted section is now '%s'",end);
248 b->used -= end_subst - beg_subst - val_len; /* update string buffer used size */
249 // XBT_DEBUG("Used:%d end:%d ending char:%d",b->used,end-b->data,*end);
251 /* we have to extend the data area */
253 val_len - (end_subst - beg_subst) + 1 /*don't forget \0 */ ;
254 int newused = b->used + tooshort;
255 end += tooshort; /* update the pointer of the overall loop */
256 // XBT_DEBUG("Too short (by %d chars; %d chars left in area)",val_len- (end_subst-beg_subst), b->size - b->used);
257 if (newused > b->size) {
258 /* We have to realloc the data area before (because b->size is too small). We have to update our pointers, too */
259 char *newdata = realloc(b->data,
260 b->used + MAX(minimal_increment,
262 int offset = newdata - b->data;
264 b->size = b->used + MAX(minimal_increment, tooshort);
269 memmove(beg_subst + val_len, end_subst, b->used - (end_subst - b->data) + 1); /* move the end of the string a bit further */
270 memmove(beg_subst, value, val_len); /* substitute */
272 // XBT_DEBUG("String is now: %s",b->data);
279 end--; /* compensate the next end++ */
291 #include "xbt/strbuff.h"
293 /* 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 */
294 #define force_resize \
295 "1.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
296 "2.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
297 "3.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
298 "4.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
299 "5.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
300 "6.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
301 "7.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
302 "8.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
303 "9.........1.........2.........3.........4.........5.........6.........7.........8.........9........." \
304 "0.........1.........2.........3.........4.........5.........6.........7.........8.........9........."
306 static void mytest(const char *input, const char *patterns,
307 const char *expected)
309 xbt_dynar_t dyn_patterns; /* splited string */
310 xbt_dict_t p; /* patterns */
312 char *str; /*foreach */
313 xbt_strbuff_t sb; /* what we test */
316 dyn_patterns = xbt_str_split(patterns, " ");
317 xbt_dynar_foreach(dyn_patterns, cpt, str) {
318 xbt_dynar_t keyvals = xbt_str_split(str, "=");
319 char *key = xbt_dynar_get_as(keyvals, 0, char *);
320 char *val = xbt_dynar_get_as(keyvals, 1, char *);
321 xbt_str_subst(key, '_', ' ', 0); // to put space in names without breaking the enclosing dynar_foreach
322 xbt_dict_set(p, key, xbt_strdup(val), free);
323 xbt_dynar_free(&keyvals);
325 xbt_dynar_free(&dyn_patterns);
326 sb = xbt_strbuff_new();
327 xbt_strbuff_append(sb, input);
328 xbt_strbuff_varsubst(sb, p);
330 xbt_test_assert(!strcmp(sb->data, expected),
331 "Input (%s) with patterns (%s) leads to (%s) instead of (%s)",
332 input, patterns, sb->data, expected);
333 xbt_strbuff_free(sb);
336 XBT_TEST_SUITE("xbt_strbuff", "String Buffers");
337 XBT_TEST_UNIT("xbt_strbuff_substitute", test_strbuff_substitute, "test the function xbt_strbuff_substitute")
339 xbt_test_add("Empty");
342 xbt_test_add("Value shorter, no braces, only variable");
343 mytest("$tutu", "tutu=t", "t");
344 xbt_test_add("Value shorter, braces, only variable");
345 mytest("${tutu}", "tutu=t", "t");
346 xbt_test_add("Value shorter, no braces, data after");
347 mytest("$tutu toto", "tutu=t", "t toto");
348 xbt_test_add("Value shorter, braces, data after");
349 mytest("${tutu} toto", "tutu=t", "t toto");
350 xbt_test_add("Value shorter, no braces, data before");
351 mytest("toto $tutu", "tutu=t", "toto t");
352 xbt_test_add("Value shorter, braces, data before");
353 mytest("toto ${tutu}", "tutu=t", "toto t");
354 xbt_test_add("Value shorter, no braces, data before and after");
355 mytest("toto $tutu tata", "tutu=t", "toto t tata");
356 xbt_test_add("Value shorter, braces, data before and after");
357 mytest("toto ${tutu} tata", "tutu=t", "toto t tata");
359 xbt_test_add("Value as long, no braces, only variable");
360 mytest("$tutu", "tutu=12345", "12345");
361 xbt_test_add("Value as long, braces, only variable");
362 mytest("${tutu}", "tutu=1234567", "1234567");
363 xbt_test_add("Value as long, no braces, data after");
364 mytest("$tutu toto", "tutu=12345", "12345 toto");
365 xbt_test_add("Value as long, braces, data after");
366 mytest("${tutu} toto", "tutu=1234567", "1234567 toto");
367 xbt_test_add("Value as long, no braces, data before");
368 mytest("toto $tutu", "tutu=12345", "toto 12345");
369 xbt_test_add("Value as long, braces, data before");
370 mytest("toto ${tutu}", "tutu=1234567", "toto 1234567");
371 xbt_test_add("Value as long, no braces, data before and after");
372 mytest("toto $tutu tata", "tutu=12345", "toto 12345 tata");
373 xbt_test_add("Value as long, braces, data before and after");
374 mytest("toto ${tutu} tata", "tutu=1234567", "toto 1234567 tata");
376 xbt_test_add("Value longer, no braces, only variable");
377 mytest("$t", "t=tututu", "tututu");
378 xbt_test_add("Value longer, braces, only variable");
379 mytest("${t}", "t=tututu", "tututu");
380 xbt_test_add("Value longer, no braces, data after");
381 mytest("$t toto", "t=tututu", "tututu toto");
382 xbt_test_add("Value longer, braces, data after");
383 mytest("${t} toto", "t=tututu", "tututu toto");
384 xbt_test_add("Value longer, no braces, data before");
385 mytest("toto $t", "t=tututu", "toto tututu");
386 xbt_test_add("Value longer, braces, data before");
387 mytest("toto ${t}", "t=tututu", "toto tututu");
388 xbt_test_add("Value longer, no braces, data before and after");
389 mytest("toto $t tata", "t=tututu", "toto tututu tata");
390 xbt_test_add("Value longer, braces, data before and after");
391 mytest("toto ${t} tata", "t=tututu", "toto tututu tata");
393 xbt_test_add("Value much longer, no braces, only variable");
394 mytest("$t", "t=" force_resize, force_resize);
395 xbt_test_add("Value much longer, no braces, data after");
396 mytest("$t toto", "t=" force_resize, force_resize " toto");
397 xbt_test_add("Value much longer, braces, data after");
398 mytest("${t} toto", "t=" force_resize, force_resize " toto");
399 xbt_test_add("Value much longer, no braces, data before");
400 mytest("toto $t", "t=" force_resize, "toto " force_resize);
401 xbt_test_add("Value much longer, braces, data before");
402 mytest("toto ${t}", "t=" force_resize, "toto " force_resize);
403 xbt_test_add("Value much longer, no braces, data before and after");
404 mytest("toto $t tata", "t=" force_resize, "toto " force_resize " tata");
405 xbt_test_add("Value much longer, braces, data before and after");
406 mytest("toto ${t} tata", "t=" force_resize,
407 "toto " force_resize " tata");
409 xbt_test_add("Escaped $");
410 mytest("\\$tutu", "tutu=t", "\\$tutu");
411 xbt_test_add("Space in var name (with braces)");
412 mytest("${tu ti}", "tu_ti=t", "t");
414 xbt_test_add("Two variables");
415 mytest("$toto $tutu", "toto=1 tutu=2", "1 2");
417 // Commented: I'm too lazy to do a memmove in var name to remove the backslash after use.
418 // Users should use braces.
419 // xbt_test_add("Escaped space in var name", "$tu\\ ti", "tu_ti=t", "t");
421 xbt_test_add("Default value");
422 mytest("${t:-toto}", "", "toto");
423 xbt_test_add("Useless default value (variable already defined)");
424 mytest("${t:-toto}", "t=TRUC", "TRUC");
428 #endif /* SIMGRID_TEST */