X-Git-Url: https://git.llucax.com/z.facultad/75.06/emufs.git/blobdiff_plain/30325d1797a0a3ecaf622c261d07366801040c88..f41ad014e7d68321ff67258b99817651ecdab0bb:/tipo3/emufs.c diff --git a/tipo3/emufs.c b/tipo3/emufs.c index a19ded7..53ba505 100644 --- a/tipo3/emufs.c +++ b/tipo3/emufs.c @@ -1,8 +1,28 @@ - #include "emufs.h" +#include "param_cte.h" + +/* Defino las extenciones que usan cada tipo de archivo */ +#define EXT_TIPO3_ID ".idx" +#define EXT_TIPO3_DATA ".dat" +#define EXT_TIPO3_DISP ".fsc" +#define EXT_TIPO3_IDS ".did" + +char *str_dup(const char *s); + +char *str_dup(const char *s) +{ + char *tmp; + if (s == NULL) return NULL; + tmp = (char *)malloc(sizeof(char)*(strlen(s)+1)); + strcpy(tmp, s); + return tmp; +} + -EMUFS *emufs_crear(const char *filename, int tipo) +EMUFS *emufs_crear(const char *filename, char tipo, unsigned int tam_bloque, unsigned int tam_reg) { + char name[255]; + FILE *fp; EMUFS *tmp = (EMUFS *)malloc(sizeof(EMUFS)); switch (tipo) { @@ -11,6 +31,44 @@ EMUFS *emufs_crear(const char *filename, int tipo) case T2: break; case T3: + tmp->tipo = T3; + tmp->tam_bloque = tam_bloque; + tmp->leer_bloque = leer_bloque; + tmp->leer_registro = leer_registro; + tmp->grabar_registro = grabar_registro; + tmp->borrar_registro = borrar_registro; + tmp->nombre = str_dup(filename); + + strcpy(name, filename); + strcat(name, EXT_TIPO3_DATA); + fp = fopen(name, "w"); + if (fp == NULL) { + /* ERROR */ + free(tmp->nombre); + free(tmp); + return NULL; + } + /* Guardo el Header */ + fwrite(&tipo, sizeof(char), 1, fp); + fwrite(&tam_bloque, sizeof(unsigned int), 1, fp); + fwrite(&tam_reg, sizeof(unsigned int), 1, fp); + fclose(fp); + + strcpy(name, filename); + strcat(name, EXT_TIPO3_ID); + fp = fopen(name, "w"); + fclose(fp); + + strcpy(name, filename); + strcat(name, EXT_TIPO3_DISP); + fp = fopen(name, "w"); + fclose(fp); + + strcpy(name, filename); + strcat(name, EXT_TIPO3_IDS); + fp = fopen(name, "w"); + fclose(fp); + break; default: free(tmp); @@ -20,4 +78,93 @@ EMUFS *emufs_crear(const char *filename, int tipo) return tmp; } +EMUFS *emufs_abrir(const char *filename) +{ + EMUFS *tmp; + char name[255]; + char tipo; + FILE *fp; + + strcpy(name, filename); + strcat(name, EXT_TIPO3_DATA); + + /* Trato de determinar el tipo de archivo */ + fp = fopen(name, "r"); + if (fp == NULL) return NULL; + fread(&tipo, sizeof(char), 1, fp); + if ((tipo < 0) || (tipo > 2)) { + fclose(fp); + return NULL; + } + + tmp = (EMUFS *)malloc(sizeof(EMUFS)); + if (tmp == NULL) { + fclose(fp); + return NULL; + } + + switch (tipo) { + case T1: + break; + case T2: + break; + case T3: + tmp->tipo = tipo; + fread(&tmp->tam_bloque, sizeof(int), 1, fp); + tmp->leer_bloque = leer_bloque; + tmp->leer_registro = leer_registro; + tmp->grabar_registro = grabar_registro; + tmp->borrar_registro = borrar_registro; + tmp->nombre = str_dup(filename); + } + + fclose(fp); + return tmp; +} + +int emufs_destruir(EMUFS *e) +{ + if (e == NULL) return 1; + free(e->nombre); + free(e); + return 0; +} +int ver_archivo_FS(EMUFS *emu) +{ + FILE *f_block_free; + BLOCK_FREE_T reg; + char name_f_block_free[255]; + + strcpy(name_f_block_free,emu->nombre); + strcat(name_f_block_free,".fsc"); + + if ( (f_block_free = fopen(name_f_block_free,"r"))==NULL ){ + printf("no pude abrir el archivo %s\n",name_f_block_free); + return -1; + } + fread(®,sizeof(reg),1,f_block_free); + while ( !feof(f_block_free) ){ + printf(" Bloque = %d Espacio libre = %d\n",reg.block, reg.free_space); + fread(®,sizeof(reg),1,f_block_free); + } + + fclose(f_block_free); + + /* Imprimo la lista de bloques/registros */ + strcpy(name_f_block_free,emu->nombre); + strcat(name_f_block_free,".idx"); + { + BLOCK_REG_T r; + f_block_free = fopen(name_f_block_free, "r"); + fread(&r, sizeof(BLOCK_REG_T), 1, f_block_free); + while (!feof(f_block_free)) { + printf("ID %ld en bloque %d\n", r.id_reg, r.block); + fread(&r, sizeof(BLOCK_REG_T), 1, f_block_free); + } + fclose(f_block_free); + } + + + return 0; +}