projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 48435ab0 WJ |
1 | /* sstr2arg: convert string into argument list */ |
| 2 | ||
| 3 | #ifndef lint | |
| 4 | static char *rcsid = "$Header: /f/osi/compat/RCS/sstr2arg.c,v 7.3 91/02/22 09:15:54 mrose Interim $"; | |
| 5 | #endif | |
| 6 | ||
| 7 | /* | |
| 8 | * $Header: /f/osi/compat/RCS/sstr2arg.c,v 7.3 91/02/22 09:15:54 mrose Interim $ | |
| 9 | * | |
| 10 | * | |
| 11 | * $Log: sstr2arg.c,v $ | |
| 12 | * Revision 7.3 91/02/22 09:15:54 mrose | |
| 13 | * Interim 6.8 | |
| 14 | * | |
| 15 | * Revision 7.2 90/10/16 11:20:29 mrose | |
| 16 | * partial-backoff-from-jpo | |
| 17 | * | |
| 18 | * Revision 7.1 90/10/15 18:19:57 mrose | |
| 19 | * sync | |
| 20 | * | |
| 21 | * Revision 7.0 89/11/23 21:23:34 mrose | |
| 22 | * Release 6.0 | |
| 23 | * | |
| 24 | */ | |
| 25 | ||
| 26 | /* | |
| 27 | * NOTICE | |
| 28 | * | |
| 29 | * Acquisition, use, and distribution of this module and related | |
| 30 | * materials are subject to the restrictions of a license agreement. | |
| 31 | * Consult the Preface in the User's Manual for the full terms of | |
| 32 | * this agreement. | |
| 33 | * | |
| 34 | */ | |
| 35 | ||
| 36 | ||
| 37 | /* LINTLIBRARY */ | |
| 38 | ||
| 39 | #include <stdio.h> | |
| 40 | #include "manifest.h" | |
| 41 | #include <errno.h> | |
| 42 | ||
| 43 | extern int errno; | |
| 44 | ||
| 45 | /* \f */ | |
| 46 | ||
| 47 | /* | |
| 48 | stash a pointer to each field into the passed array. any common seperators | |
| 49 | split the words. extra white-space between fields is ignored. | |
| 50 | ||
| 51 | specially-interpreted characters: | |
| 52 | double-quote, backslash (preceding a special char with a backslash | |
| 53 | removes its interpretation. A backslash not followed by a special is | |
| 54 | used to preface an octal specification for one character a string begun | |
| 55 | with double-quote has only double-quote and backslash as special | |
| 56 | characters. | |
| 57 | ||
| 58 | */ | |
| 59 | ||
| 60 | ||
| 61 | ||
| 62 | ||
| 63 | sstr2arg (srcptr, maxpf, argv, dlmstr) | |
| 64 | register char *srcptr; /* source data */ | |
| 65 | int maxpf; /* maximum number of permitted fields */ | |
| 66 | char *argv[]; /* where to put the pointers */ | |
| 67 | char *dlmstr; /* Delimiting character */ | |
| 68 | { | |
| 69 | char gotquote; /* currently parsing quoted string */ | |
| 70 | register int ind; | |
| 71 | register char *destptr; | |
| 72 | ||
| 73 | if (srcptr == 0) { | |
| 74 | errno = EINVAL; /* emulate system-call failure */ | |
| 75 | return (NOTOK); | |
| 76 | } | |
| 77 | ||
| 78 | for (ind = 0, maxpf -= 2;; ind++) { | |
| 79 | if (ind >= maxpf) { | |
| 80 | errno = E2BIG; /* emulate system-call failure */ | |
| 81 | return (NOTOK); | |
| 82 | } | |
| 83 | ||
| 84 | /* Skip leading white space */ | |
| 85 | for (; *srcptr == '\t' || *srcptr == ' '; srcptr++); | |
| 86 | ||
| 87 | argv [ind] = srcptr; | |
| 88 | destptr = srcptr; | |
| 89 | ||
| 90 | for (gotquote = 0; ; ) { | |
| 91 | register char *cp; | |
| 92 | ||
| 93 | for (cp = dlmstr; (*cp != '\0') && (*cp != *srcptr); cp++); | |
| 94 | ||
| 95 | if (*cp != '\0') | |
| 96 | { | |
| 97 | if (gotquote) { /* don't interpret the char */ | |
| 98 | *destptr++ = *srcptr++; | |
| 99 | continue; | |
| 100 | } | |
| 101 | ||
| 102 | srcptr++; | |
| 103 | *destptr = '\0'; | |
| 104 | goto nextarg; | |
| 105 | } else { | |
| 106 | switch (*srcptr) { | |
| 107 | default: /* just copy it */ | |
| 108 | *destptr++ = *srcptr++; | |
| 109 | break; | |
| 110 | ||
| 111 | case '\"': /* beginning or end of string */ | |
| 112 | gotquote = (gotquote) ? 0 : 1 ; | |
| 113 | srcptr++; /* just toggle */ | |
| 114 | break; | |
| 115 | ||
| 116 | case '\\': /* quote next character */ | |
| 117 | srcptr++; /* skip the back-slash */ | |
| 118 | switch (*srcptr) { | |
| 119 | /* Octal character */ | |
| 120 | case '0': case '1': case '2': case '3': | |
| 121 | case '4': case '5': case '6': case '7': | |
| 122 | *destptr = '\0'; | |
| 123 | do | |
| 124 | *destptr = (*destptr << 3) | (*srcptr++ - '0'); | |
| 125 | while (*srcptr >= '0' && *srcptr <= '7'); | |
| 126 | destptr++; | |
| 127 | break; | |
| 128 | /* C escape char */ | |
| 129 | case 'b': *destptr++ = '\b'; srcptr++; break; | |
| 130 | case 'n': *destptr++ = '\n'; srcptr++; break; | |
| 131 | case 'r': *destptr++ = '\r'; srcptr++; break; | |
| 132 | case 't': *destptr++ = '\t'; srcptr++; break; | |
| 133 | /* Boring -- just copy ASIS */ | |
| 134 | default: | |
| 135 | *destptr++ = *srcptr++; | |
| 136 | } | |
| 137 | break; | |
| 138 | ||
| 139 | case '\0': | |
| 140 | *destptr = '\0'; | |
| 141 | ind++; | |
| 142 | argv[ind] = (char *) 0; | |
| 143 | return (ind); | |
| 144 | } | |
| 145 | } | |
| 146 | } | |
| 147 | nextarg: | |
| 148 | continue; | |
| 149 | } | |
| 150 | } |