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popt/poptparse.c

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00001 
00005 /* (C) 1998-2000 Red Hat, Inc. -- Licensing details are in the COPYING
00006    file accompanying popt source distributions, available from 
00007    ftp://ftp.rpm.org/pub/rpm/dist. */
00008 
00009 #include "system.h"
00010 
00011 #define POPT_ARGV_ARRAY_GROW_DELTA 5
00012 
00013 int poptDupArgv(int argc, const char **argv,
00014                 int * argcPtr, const char *** argvPtr)
00015 {
00016     size_t nb = (argc + 1) * sizeof(*argv);
00017     const char ** argv2;
00018     char * dst;
00019     int i;
00020 
00021     if (argc <= 0 || argv == NULL)      /* XXX can't happen */
00022         return POPT_ERROR_NOARG;
00023     for (i = 0; i < argc; i++) {
00024         if (argv[i] == NULL)
00025             return POPT_ERROR_NOARG;
00026         nb += strlen(argv[i]) + 1;
00027     }
00028         
00029     dst = malloc(nb);
00030     if (dst == NULL)                    /* XXX can't happen */
00031         return POPT_ERROR_MALLOC;
00032     argv2 = (void *) dst;
00033     dst += (argc + 1) * sizeof(*argv);
00034 
00035     for (i = 0; i < argc; i++) {
00036         argv2[i] = dst;
00037         dst += strlen(strcpy(dst, argv[i])) + 1;
00038     }
00039     argv2[argc] = NULL;
00040 
00041     if (argvPtr) {
00042         *argvPtr = argv2;
00043     } else {
00044         free(argv2);
00045         argv2 = NULL;
00046     }
00047     if (argcPtr)
00048         *argcPtr = argc;
00049     return 0;
00050 }
00051 
00052 int poptParseArgvString(const char * s, int * argcPtr, const char *** argvPtr)
00053 {
00054     const char * src;
00055     char quote = '\0';
00056     int argvAlloced = POPT_ARGV_ARRAY_GROW_DELTA;
00057     const char ** argv = malloc(sizeof(*argv) * argvAlloced);
00058     int argc = 0;
00059     int buflen = strlen(s) + 1;
00060     char * buf = memset(alloca(buflen), 0, buflen);
00061     int rc = POPT_ERROR_MALLOC;
00062 
00063     if (argv == NULL) return rc;
00064     argv[argc] = buf;
00065 
00066     for (src = s; *src != '\0'; src++) {
00067         if (quote == *src) {
00068             quote = '\0';
00069         } else if (quote != '\0') {
00070             if (*src == '\\') {
00071                 src++;
00072                 if (!*src) {
00073                     rc = POPT_ERROR_BADQUOTE;
00074                     goto exit;
00075                 }
00076                 if (*src != quote) *buf++ = '\\';
00077             }
00078             *buf++ = *src;
00079         } else if (isspace(*src)) {
00080             if (*argv[argc] != '\0') {
00081                 buf++, argc++;
00082                 if (argc == argvAlloced) {
00083                     argvAlloced += POPT_ARGV_ARRAY_GROW_DELTA;
00084                     argv = realloc(argv, sizeof(*argv) * argvAlloced);
00085                     if (argv == NULL) goto exit;
00086                 }
00087                 argv[argc] = buf;
00088             }
00089         } else switch (*src) {
00090           case '"':
00091           case '\'':
00092             quote = *src;
00093             break;
00094           case '\\':
00095             src++;
00096             if (!*src) {
00097                 rc = POPT_ERROR_BADQUOTE;
00098                 goto exit;
00099             }
00100             /*@fallthrough@*/
00101           default:
00102             *buf++ = *src;
00103             break;
00104         }
00105     }
00106 
00107     if (strlen(argv[argc])) {
00108         argc++, buf++;
00109     }
00110 
00111     rc = poptDupArgv(argc, argv, argcPtr, argvPtr);
00112 
00113 exit:
00114     if (argv) free(argv);
00115     return rc;
00116 }

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