ref: ef707958359b91d9cc34a29f4f5328a069a4c1ce
dir: /src/helpers/stdfile.c/
/* _______ ____ __ ___ ___ * \ _ \ \ / \ / \ \ / / ' ' ' * | | \ \ | | || | \/ | . . * | | | | | | || ||\ /| | * | | | | | | || || \/ | | ' ' ' * | | | | | | || || | | . . * | |_/ / \ \__// || | | * /_______/ynamic \____/niversal /__\ /____\usic /| . . ibliotheque * / \ * / . \ * stdfile.c - stdio file input module. / / \ \ * | < / \_ * By entheh. | \/ /\ / * \_ / > / * | \ / / * | ' / * \__/ */ #include <stdio.h> #include "dumb.h" typedef struct dumb_stdfile { FILE *file; dumb_off_t size; } dumb_stdfile; static void *dumb_stdfile_open(const char *filename) { dumb_stdfile *file = (dumb_stdfile *)malloc(sizeof(dumb_stdfile)); if (!file) return 0; file->file = fopen(filename, "rb"); if (!file->file) { free(file); return 0; } fseek(file->file, 0, SEEK_END); file->size = ftell(file->file); if (file->size < 0) { fclose(file->file); free(file); return 0; } fseek(file->file, 0, SEEK_SET); return file; } static int dumb_stdfile_skip(void *f, dumb_off_t n) { dumb_stdfile *file = (dumb_stdfile *)f; return fseek(file->file, n, SEEK_CUR); } static int dumb_stdfile_getc(void *f) { dumb_stdfile *file = (dumb_stdfile *)f; return fgetc(file->file); } static dumb_ssize_t dumb_stdfile_getnc(char *ptr, size_t n, void *f) { dumb_stdfile *file = (dumb_stdfile *)f; return fread(ptr, 1, n, file->file); } static void dumb_stdfile_close(void *f) { dumb_stdfile *file = (dumb_stdfile *)f; fclose(file->file); free(f); } static void dumb_stdfile_noclose(void *f) { free(f); } static int dumb_stdfile_seek(void *f, dumb_off_t n) { dumb_stdfile *file = (dumb_stdfile *)f; return fseek(file->file, n, SEEK_SET); } static dumb_off_t dumb_stdfile_get_size(void *f) { dumb_stdfile *file = (dumb_stdfile *)f; return file->size; } static const DUMBFILE_SYSTEM stdfile_dfs = { dumb_stdfile_open, dumb_stdfile_skip, dumb_stdfile_getc, dumb_stdfile_getnc, dumb_stdfile_close, dumb_stdfile_seek, dumb_stdfile_get_size}; void dumb_register_stdfiles(void) { register_dumbfile_system(&stdfile_dfs); } static const DUMBFILE_SYSTEM stdfile_dfs_leave_open = {NULL, dumb_stdfile_skip, dumb_stdfile_getc, dumb_stdfile_getnc, dumb_stdfile_noclose, dumb_stdfile_seek, dumb_stdfile_get_size}; DUMBFILE *dumbfile_open_stdfile(FILE *p) { dumb_stdfile *file = (dumb_stdfile *)malloc(sizeof(dumb_stdfile)); DUMBFILE *d; if (!file) return 0; file->file = p; fseek(p, 0, SEEK_END); file->size = ftell(p); if (file->size < 0) { free(file); return 0; } fseek(p, 0, SEEK_SET); d = dumbfile_open_ex(file, &stdfile_dfs_leave_open); return d; }