diff options
| -rw-r--r-- | bdiff-lua.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/bdiff-lua.c b/bdiff-lua.c new file mode 100644 index 0000000..5b5fbe9 --- /dev/null +++ b/bdiff-lua.c @@ -0,0 +1,41 @@ +#include <stdio.h> +#include <stdlib.h> + +int main(int argc, char ** argv) { + FILE * in1, * in2, * out; + size_t s1, s2, p, b, c; + int b1, b2; + + if (argc != 4) { printf("Usage: %s fin1 fin2 fout\n", argv[0]); exit(-1); } + + if ((in1 = fopen(argv[1], "rb")) == 0) { printf("Error opening %s\n", argv[1]); perror("fopen"); exit(-1); } + if ((in2 = fopen(argv[2], "rb")) == 0) { printf("Error opening %s\n", argv[2]); perror("fopen"); exit(-1); } + if ((out = fopen(argv[3], "wb")) == 0) { printf("Error opening %s\n", argv[3]); perror("fopen"); exit(-1); } + + fseek(in1, 0, SEEK_END); s1 = ftell(in1); fseek(in1, 0, SEEK_SET); + fseek(in2, 0, SEEK_END); s2 = ftell(in2); fseek(in2, 0, SEEK_SET); + + if (s1 != s2) { printf("Error: files are of different sizes.\n"); exit(-1); } + + b = s1 - 1; + + fprintf(out, "patch = {\n"); + + for (p = 0; p < s1; p++) { + b1 = fgetc(in1); + b2 = fgetc(in2); + + if (b1 != b2) { + b++; + if ((b != p) && (b != s1)) fprintf(out, " },\n"); + if (b != p) { fprintf(out, " [0x%06x] = { ", p); c = 0; } else { fprintf(out, ", "); c++; } + if (c == 16) { fprintf(out, "\n "); c = 0; } + fprintf(out, "0x%02x", b2); + b = p; + } + } + + fprintf(out, " },\n}\n"); + + fclose(in1); fclose(in2); fclose(out); +} |