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POStrange character replacement where it makes no sense (to me)
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Sorry for the long sections of code, but I am stumped and need a hand! My specific problem is that when I use my parse method in order to call a "del" event, I get that odd character replacement going on in a line that, as far as I can tell, isn't being touched. This does not happen when I directly call the function "del." I've spent far too long poring over this code to no avail, attempting to implement a different way of tokenizing strings; you name it. I included ALL my code because I don't know where the issue is, as I am starting to think it does not lie within the function "parse." I'll hang around and give as much information as is requested, for now I don't know what else to add. P.S. The compiler links against the gnu windows libraries, that's where strsep comes from. <a href="http://gnuwin32.sourceforge.net/packages/libgw32c.htm" rel="nofollow" title="LibGW32C for Windows">LibGW32C for Windows</a> P.P.S. Only compiler warning is it whining about me not using char* buf db.h <pre><code>#define MAX_ITEMS 80 typedef struct item { long id; char* name; char* desc; float price; } item_t; extern char *strsep (char **restrict stringp, const char *restrict delim); int isLong (char* str); int isFloat (char* str); void add (item_t* item, long id, char* name, char* desc, float price); void del (item_t* item, long id); void modify (item_t* item, long id, char* name, char* desc, float price); void disp (item_t* item, long id); void itemCopy (item_t* from, item_t* to); void parse (item_t* item, char* buf); int findLastElement (item_t* item); </code></pre> db.c <pre><code>#include <stdio.h> #include <ctype.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <errno.h> #include "db.h" int isLong (char* str) { if (str == NULL) { return 0; } char* pEnd; strtol (str, &pEnd, 10); if (isalpha (*pEnd) || *pEnd == ' ') { return 0; } else { return 1; } } int isFloat (char* str) { if (str == NULL) { return 0; } char* pEnd; strtod (str, &pEnd); if (isalpha (*pEnd) || *pEnd == ' ') { return 0; } else { return 1; } } void add (item_t *item, long id, char* name, char* desc, float price) { int i = 0; while (1) { if (item[i].id == id) { printf ("Item \"%s\" with ID %lu already exists.\n", item[i].name, id); break; } else if (item[i].id == 0) { item[i].id = id; item[i].name = name; item[i].desc = desc; item[i].price = price; break; } else { i++; } } } void del (item_t* item, long id) { int i = 0; int end = findLastElement (item); while (1) { if (item[i].id == id) { item[i].id = 0; item[i].name = ""; item[i].desc = ""; item[i].price = 0; while (i < end) { itemCopy (&item [i + 1], &item [i]); i++; } break; } else { if (i == MAX_ITEMS) { printf ("Item with ID %lu does not exist.\n", id); break; } i++; } } } void modify (item_t *item, long id, char* name, char* desc, float price) { int i = 0; while (1) { if (item[i].id == id) { item[i].name = name; item[i].desc = desc; item[i].price = price; break; } else { if (i == MAX_ITEMS) { printf ("Item with ID %lu does not exist.\n", id); break; } i++; } } } void disp (item_t* item, long id) { int end = findLastElement (item); printf ("\nID\tNAME\tDESCRIPTION\tPRICE\n--\t----\t-----------\t-----\n"); if (id == -1) { for (int i = 0; i < end; i++) { printf ("%lu\t%s\t%s\t$%2.2f\n", item[i].id, item[i].name, item[i].desc, item[i].price); } } else { for (int i = 0; i < end; i++) { if (item[i].id == id) { printf ("%lu\t%s\t%s\t$%2.2f\n", item[i].id, item[i].name, item[i].desc, item[i].price); break; } } } } void itemCopy (item_t* from, item_t* to) { to -> id = from -> id; to -> name = from -> name; to -> desc = from -> desc; to -> price = from -> price; } void parse (item_t* item, char* str) { char **ap, *argv[10], *inputstr = malloc (sizeof(str)), *ptr; strcpy (inputstr, str); memset (argv, 0, sizeof (argv)); for (ap = argv; (*ap = strsep (&inputstr, ",\n")) != NULL;) { if (**ap != '\0') { if (++ap >= &argv[10]) { break; } } } if (strcmp (argv[0], "add\0") == 0) { if (!isLong (argv[1]) || argv[1] == NULL) { printf ("\nInvalid/Missing ID\n"); return; } else if (argv[2] == NULL) { printf ("\nInvalid/Missing Product Name.\n"); return; } else if (argv[3] == NULL) { printf ("\nInvalid/Missing Product Description.\n"); return; } else if (!isFloat (argv[4]) || argv[4] == NULL) { printf ("\nInvalid/Missing Price\n"); return; } else { add (item, strtol (argv[1], &ptr, 10), argv[2], argv[3], strtod (argv[4], &ptr)); } } else if (strcmp (argv[0], "del\0") == 0) { if (!isLong (argv[1]) || argv[1] == NULL) { printf ("\nInvalid/Missing ID\n"); return; } else { del (item, strtol (argv[1], &ptr, 10)); } } } int findLastElement (item_t* item) { for (int i = 0; i < MAX_ITEMS; i++) { if (item[i].id == 0) return i; } return -1; } </code></pre> main.c <pre><code>#include <stdio.h> #include <stdlib.h> #include <string.h> #include <unistd.h> #include <errno.h> #include "db.h" int main (int argc, char* argv[]) { item_t item [MAX_ITEMS]; memset (item, 0, sizeof (item)); char* buf = malloc (255); int exit = 0; while (!exit) { printf ("Adding 3 test items.\n"); add (item, 1234, "Pizza", "Tasty Pizza", 9.99F); add (item, 5678, "Pasta", "Tasty Pasta", 19.99F); add (item, 9012, "Ribs", "Tasty Ribs", 29.99F); disp (item, -1); printf ("\nDeleting Item with ID 5678.\n"); del (item, 5678); disp (item, -1); printf ("\nModifying item with ID 1234.\n"); modify (item, 1234, "Soup", "Tasty Soup", 4.99F); disp (item, -1); printf ("\nAdding another item with id 5678."); add (item, 5678, "Pasta", "Tasty Pasta", 19.99F); printf ("\nAdding item \"Pizza\" with the same ID as \"Soup\".\n"); add (item, 1234, "Pizza", "Tasty Pizza", 9.99F); disp (item, -1); printf ("\nDeleting item \"Soup\" and re-adding \"Pizza\".\n"); del (item, 1234); add (item, 1234, "Pizza", "Tasty Pizza", 9.99F); disp (item, -1); printf ("\nDisplaying only the item with id 5678.\n"); disp (item, 5678); printf ("\nAdding item \"Wings\" using the parsing function.\n"); parse (item, "add,9898,Wings,Tasty Wings,14.99\n"); disp (item, -1); printf ("\nAttempting to Delete non-existent item with ID 9999.\n"); //del (item, 9999); parse (item, "del,9999\n"); <--- This is the problem line printf ("\nAttempting to Modify non-existent item with ID 9999.\n"); modify (item, 9999, "Test", "Test", 0.0F); disp (item, -1); exit = 1; } } </code></pre> And finally, my output: <pre><code>Adding 3 test items. ID NAME DESCRIPTION PRICE -- ---- ----------- ----- 1234 Pizza Tasty Pizza $9.99 5678 Pasta Tasty Pasta $19.99 9012 Ribs Tasty Ribs $29.99 Deleting Item with ID 5678. ID NAME DESCRIPTION PRICE -- ---- ----------- ----- 1234 Pizza Tasty Pizza $9.99 9012 Ribs Tasty Ribs $29.99 Modifying item with ID 1234. ID NAME DESCRIPTION PRICE -- ---- ----------- ----- 1234 Soup Tasty Soup $4.99 9012 Ribs Tasty Ribs $29.99 Adding another item with id 5678. Adding item "Pizza" with the same ID as "Soup". Item "Soup" with ID 1234 already exists. ID NAME DESCRIPTION PRICE -- ---- ----------- ----- 1234 Soup Tasty Soup $4.99 9012 Ribs Tasty Ribs $29.99 5678 Pasta Tasty Pasta $19.99 Deleting item "Soup" and re-adding "Pizza". ID NAME DESCRIPTION PRICE -- ---- ----------- ----- 9012 Ribs Tasty Ribs $29.99 5678 Pasta Tasty Pasta $19.99 1234 Pizza Tasty Pizza $9.99 Displaying only the item with id 5678. ID NAME DESCRIPTION PRICE -- ---- ----------- ----- 5678 Pasta Tasty Pasta $19.99 Adding item "Wings" using the parsing function. ID NAME DESCRIPTION PRICE -- ---- ----------- ----- 9012 Ribs Tasty Ribs $29.99 5678 Pasta Tasty Pasta $19.99 1234 Pizza Tasty Pizza $9.99 9898 Wings Tasty Wings $14.99 Attempting to Delete non-existent item with ID 9999. Item with ID 9999 does not exist. Attempting to Modify non-existent item with ID 9999. Item with ID 9999 does not exist. ID NAME DESCRIPTION PRICE -- ---- ----------- ----- 9012 Ribs Tasty Ribs $29.99 5678 Pasta Tasty Pasta $19.99 1234 Pizza Tasty Pizza $9.99 9898 Win♦ Çdel $14.99 <--- THIS IS WHAT'S DOING MY HEAD IN </code></pre> Thanks for your help in advance! I really hope this doesn't end up being some trivially stupid rookie error.
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Strange character replacement where it makes no sense (to me)
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