1 /*-------------------------------------------------------------------------
2 SDCCutil.c - Small utility functions.
4 Written By - Sandeep Dutta . sandeep.dutta@usa.net (1999)
6 This program is free software; you can redistribute it and/or modify it
7 under the terms of the GNU General Public License as published by the
8 Free Software Foundation; either version 2, or (at your option) any
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program; if not, write to the Free Software
18 Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
20 In other words, you are welcome to use, share and improve this program.
21 You are forbidden to forbid anyone else to use, share and improve
22 what you give them. Help stamp out software-hoarding!
23 -------------------------------------------------------------------------*/
30 #include "SDCCglobl.h"
31 #include "SDCCmacro.h"
35 /** Given an array of name, value string pairs creates a new hash
36 containing all of the pairs.
39 populateStringHash(const char **pin)
45 shash_add (&pret, pin[0], pin[1]);
52 /** Given an array of string pointers and another string, adds the
53 string to the end of the list. The end of the list is assumed to
54 be the first NULL pointer.
57 addToList (const char **list, const char *str)
59 /* This is the bad way to do things :) */
62 *list = Safe_strdup (str);
65 werror (E_OUT_OF_MEM, __FILE__, 0);
71 /** Given an array of string pointers returns a string containing all
72 of the strings seperated by spaces. The returned string is on the
73 heap. The join stops when a NULL pointer is hit.
76 join(const char **pplist)
82 strncatz(buffer, *pplist, PATH_MAX);
83 strncatz(buffer, " ", PATH_MAX);
90 /** Given an array of string pointers, returns a string containing all
91 of the strings seperated by spaces. The returned string is on the
92 heap. n is the number of strings in the list.
95 joinn(char **pplist, int n)
101 strncatz(buffer, *pplist, PATH_MAX);
102 strncatz(buffer, " ", PATH_MAX);
109 /** Returns TRUE if for the host the two path characters are
113 pathCharsEquivalent(char c1, char c2)
116 /* win32 is case insensitive */
117 if (tolower(c1) == tolower(c2))
121 /* And / is equivalent to \ */
122 else if (c1 == '/' && c2 == '\\')
126 else if (c1 == '\\' && c2 == '/')
135 /* Assume a Unix host where they must match exactly. */
141 pathCharTransform(char c)
146 return DIR_SEPARATOR_CHAR;
157 /** Fixes up a potentially mixed path to the proper representation for
158 the host. Fixes up in place.
167 *p = pathCharTransform(*p);
175 /** Returns the characters in p2 past the last matching characters in
179 getPathDifference (char *pinto, const char *p1, const char *p2)
184 /* win32 can have a path at the start. */
187 p2 = strchr(p2, ':')+1;
191 while (*p1 != '\0' && *p2 != '\0')
193 if (pathCharsEquivalent(*p1, *p2) == FALSE)
206 return fixupPath(pinto);
210 /** Given a file with path information in the binary files directory,
211 returns the directory component. Used for discovery of bin
212 directory of SDCC installation. Returns NULL if the path is
217 getBinPath(const char *prel)
221 static char path[PATH_MAX];
223 /* try DOS and *nix dir separator on WIN32 */
224 if (NULL != (p = strrchr(prel, DIR_SEPARATOR_CHAR)) ||
225 NULL != (p = strrchr(prel, UNIX_DIR_SEPARATOR_CHAR))) {
226 len = min((sizeof path) - 1, p - prel);
227 strncpy(path, prel, len);
231 /* not enough info in prel; do it with module name */
232 else if (0 != GetModuleFileName(NULL, path, sizeof path) != 0 &&
233 NULL != (p = strrchr(path, DIR_SEPARATOR_CHAR))) {
242 getBinPath(const char *prel)
246 static char path[PATH_MAX];
248 if ((p = strrchr(prel, DIR_SEPARATOR_CHAR)) == NULL)
251 len = min((sizeof path) - 1, p - prel);
252 strncpy(path, prel, len);
259 /** Returns true if the given path exists.
262 pathExists (const char *ppath)
266 return stat (ppath, &s) == 0;
269 static hTab *_mainValues;
272 setMainValue (const char *pname, const char *pvalue)
276 shash_add (&_mainValues, pname, pvalue);
280 buildCmdLine2 (char *pbuffer, const char *pcmd, size_t len)
283 assert(pbuffer && pcmd);
286 poutcmd = msprintf(_mainValues, pcmd);
287 strncpyz(pbuffer, poutcmd, len);
291 populateMainValues (const char **ppin)
293 _mainValues = populateStringHash(ppin);
296 /** Returns true if sz starts with the string given in key.
299 startsWith (const char *sz, const char *key)
301 return !strncmp (sz, key, strlen (key));
304 /** Removes any newline characters from the string. Not strictly the
305 same as perl's chomp.
311 while ((nl = strrchr (sz, '\n')))
316 getRuntimeVariables(void)
322 /* strncpy() with guaranteed NULL termination. */
323 char *strncpyz(char *dest, const char *src, size_t n)
331 fprintf(stderr, "strncpyz prevented buffer overrun!\n");
334 strncpy(dest, src, n);
339 /* like strncat() with guaranteed NULL termination
340 * The passed size should be the size of the dest buffer, not the number of
343 char *strncatz(char *dest, const char *src, size_t n)
346 size_t destLen = strlen(dest);
351 maxToCopy = n - destLen - 1;
354 if (strlen(src) + destLen >= n)
356 fprintf(stderr, "strncatz prevented buffer overrun!\n");
359 strncat(dest, src, maxToCopy);
365 #if defined(HAVE_VSNPRINTF) || defined(HAVE_VSPRINTF)
366 size_t SDCCsnprintf(char *dst, size_t n, const char *fmt, ...)
373 # if defined(HAVE_VSNPRINTF)
374 len = vsnprintf(dst, n, fmt, args);
376 vsprintf(dst, fmt, args);
377 len = strlen(dst) + 1;
382 /* on some gnu systems, vsnprintf returns -1 if output is truncated.
383 * In the C99 spec, vsnprintf returns the number of characters that
384 * would have been written, were space available.
386 if ((len < 0) || (size_t) len >= n) {
387 fprintf(stderr, "internal error: sprintf truncated.\n");