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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     /*@-branchstate@*/
00036     for (i = 0; i < argc; i++) {
00037         argv2[i] = dst;
00038         dst += strlen(strcpy(dst, argv[i])) + 1;
00039     }
00040     /*@=branchstate@*/
00041     argv2[argc] = NULL;
00042 
00043     if (argvPtr) {
00044         *argvPtr = argv2;
00045     } else {
00046         free(argv2);
00047         argv2 = NULL;
00048     }
00049     if (argcPtr)
00050         *argcPtr = argc;
00051     return 0;
00052 }
00053 
00054 int poptParseArgvString(const char * s, int * argcPtr, const char *** argvPtr)
00055 {
00056     const char * src;
00057     char quote = '\0';
00058     int argvAlloced = POPT_ARGV_ARRAY_GROW_DELTA;
00059     const char ** argv = malloc(sizeof(*argv) * argvAlloced);
00060     int argc = 0;
00061     int buflen = strlen(s) + 1;
00062     char * buf = memset(alloca(buflen), 0, buflen);
00063     int rc = POPT_ERROR_MALLOC;
00064 
00065     if (argv == NULL) return rc;
00066     argv[argc] = buf;
00067 
00068     for (src = s; *src != '\0'; src++) {
00069         if (quote == *src) {
00070             quote = '\0';
00071         } else if (quote != '\0') {
00072             if (*src == '\\') {
00073                 src++;
00074                 if (!*src) {
00075                     rc = POPT_ERROR_BADQUOTE;
00076                     goto exit;
00077                 }
00078                 if (*src != quote) *buf++ = '\\';
00079             }
00080             *buf++ = *src;
00081         } else if (isspace(*src)) {
00082             if (*argv[argc] != '\0') {
00083                 buf++, argc++;
00084                 if (argc == argvAlloced) {
00085                     argvAlloced += POPT_ARGV_ARRAY_GROW_DELTA;
00086                     argv = realloc(argv, sizeof(*argv) * argvAlloced);
00087                     if (argv == NULL) goto exit;
00088                 }
00089                 argv[argc] = buf;
00090             }
00091         } else switch (*src) {
00092           case '"':
00093           case '\'':
00094             quote = *src;
00095             /*@switchbreak@*/ break;
00096           case '\\':
00097             src++;
00098             if (!*src) {
00099                 rc = POPT_ERROR_BADQUOTE;
00100                 goto exit;
00101             }
00102             /*@fallthrough@*/
00103           default:
00104             *buf++ = *src;
00105             /*@switchbreak@*/ break;
00106         }
00107     }
00108 
00109     if (strlen(argv[argc])) {
00110         argc++, buf++;
00111     }
00112 
00113     rc = poptDupArgv(argc, argv, argcPtr, argvPtr);
00114 
00115 exit:
00116     if (argv) free(argv);
00117     return rc;
00118 }

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