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annotate src/libident/support.c @ 239:31ee44f45787

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refactored alias.c heavily especially substituted the loop-based alias_expand() with a recursive approach. Now alias_expand() wraps alias_one() which recursively expands aliases. In principle the ``data processing'' is the same but now it's clearer structured and thus easier to understand IMO. The loop might have been faster but I don't care for speed -- the most simple solution is the best. It's fast enough, that is sufficient.
author markus schnalke <meillo@marmaro.de>
date Mon, 25 Oct 2010 15:35:28 -0300
parents 08114f7dcc23
children
rev   line source
meillo@0 1 /*
meillo@0 2 ** support.c
meillo@0 3 **
meillo@0 4 ** Author: Pr Emanuelsson <pell@lysator.liu.se>
meillo@0 5 ** Hacked by: Peter Eriksson <pen@lysator.liu.se>
meillo@0 6 */
meillo@0 7 #include <stdio.h>
meillo@0 8 #include <ctype.h>
meillo@0 9
meillo@0 10 #ifdef HAVE_ANSIHEADERS
meillo@0 11 # include <stdlib.h>
meillo@0 12 # include <string.h>
meillo@0 13 #else
meillo@0 14 # define strchr(str, c) index(str, c)
meillo@0 15 #endif
meillo@0 16
meillo@0 17 #define IN_LIBIDENT_SRC
meillo@0 18 #include "ident.h"
meillo@0 19
meillo@0 20
meillo@10 21 char*
meillo@10 22 id_strdup __P1(char *, str)
meillo@0 23 {
meillo@10 24 char *cp;
meillo@0 25
meillo@10 26 cp = (char *) malloc(strlen(str) + 1);
meillo@10 27 if (cp == NULL) {
meillo@0 28 #ifdef DEBUG
meillo@10 29 perror("libident: malloc");
meillo@0 30 #endif
meillo@10 31 return NULL;
meillo@10 32 }
meillo@0 33
meillo@10 34 strcpy(cp, str);
meillo@0 35
meillo@10 36 return cp;
meillo@0 37 }
meillo@0 38
meillo@0 39
meillo@10 40 char*
meillo@10 41 id_strtok __P3(char *, cp, char *, cs, char *, dc)
meillo@0 42 {
meillo@10 43 static char *bp = 0;
meillo@10 44
meillo@10 45 if (cp)
meillo@10 46 bp = cp;
meillo@10 47
meillo@10 48 /*
meillo@10 49 ** No delimitor cs - return whole buffer and point at end
meillo@10 50 */
meillo@10 51 if (!cs) {
meillo@10 52 while (*bp)
meillo@10 53 bp++;
meillo@10 54 return cs;
meillo@10 55 }
meillo@10 56
meillo@10 57 /*
meillo@10 58 ** Skip leading spaces
meillo@10 59 */
meillo@10 60 while (isspace(*bp))
meillo@10 61 bp++;
meillo@10 62
meillo@10 63 /*
meillo@10 64 ** No token found?
meillo@10 65 */
meillo@10 66 if (!*bp)
meillo@10 67 return 0;
meillo@10 68
meillo@10 69 cp = bp;
meillo@10 70 while (*bp && !strchr(cs, *bp))
meillo@10 71 bp++;
meillo@10 72
meillo@10 73 /*
meillo@10 74 ** Remove trailing spaces
meillo@10 75 */
meillo@10 76 *dc = *bp;
meillo@10 77 for (dc = bp - 1; dc > cp && isspace(*dc); dc--);
meillo@10 78 *++dc = '\0';
meillo@10 79
meillo@0 80 bp++;
meillo@10 81
meillo@10 82 return cp;
meillo@0 83 }