help with a jpgfile needed

Try a modification of the following. You need to change the method of inputting the search string, and then should change the output to be the string plus remainder of the file.

* Leor Zolman *

* And heres another throw -- binfsrch.c by CBF *

* The difference between a binary and a text file, on read, is the conversion of end-of-line delimiters. What those delimiters are does not affect the action. In some cases the presence of 0x1a EOF markers (MsDos) does.

This is a version of Knuth-Morris-Pratt algorithm. The point of using this is to avoid any backtracking in file reading, and thus avoiding any use of buffer arrays. *

sizet chrcount;* debuggery, count of input chars, zeroed *

* --------------------- *

* Almost straight out of Sedgewick *-* The next array indicates what index in id should next be compared to the current char. Once the (lgh - 1)th char has been successfully compared, the id has been found. The array is formed by comparing id to itself. *void initnext(int *next, const char *id, int lgh) { int i, j;

next0 = -1; i = 0; j = -1; i++; j++; nexti = j; } #if (0) printf("id%d = '%c' next%d = %d-n", i, idi, i, nexti); #endif }* initnext *

* --------------------- *

* reads f without rewinding until either EOF or *marker has been found. Returns EOF if not found. At exit the last matching char has been read, and no further. *int kmpffind(const char *marker, int lgh, int *next, FILE *f) { int j; * char position in marker to check * int ch; * current char *

j = 0; chrcount++; j++; } return ch; }* kmpffind *

* --------------------- *

* Find marker in f, display following printing chars up to some non printing character or EOF *int binfsrch(const char *marker, FILE *f) { int *next; int lgh; int ch; int items; * count of markers found *

lgh = strlen(marker); if (!(next = malloc(lgh * sizeof *next))) { puts("No memory"); exit(EXITFAILURE); } else { initnext(next, marker, lgh); items = 0; while (EOF != kmpffind(marker, lgh, next, f)) { * found, take appropriate action * items++; printf("%d %s :, items, marker); while (isprint(ch = getc(f))) { chrcount++; putchar(ch); } puts("-); if (EOF == ch) break; else chrcount++; } free(next); return items; } }* binfsrch *

* --------------------- *

int main(int argc, char **argv) { FILE *f;

f = stdin; if (3 == argc) { if (!(f = fopen(argv2, "rb"))) { printf("Can't open %s-n", argv2); exit(EXITFAILURE); } argc--; } if (2 != argc) { puts("Usage: binfsrch name binaryfile"); puts(" (file defaults to stdin text mode)"); } else if (binfsrch(argv1, f)) { printf("-"%s-" : found-n", argv1); } else printf("-"%s-" : not found-n", argv1); printf("%lu chars-n", (unsigned long)chrcount); return 0; }* main binfsrch *

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