mirror of
https://github.com/ilyakooo0/urbit.git
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328 lines
6.6 KiB
C
328 lines
6.6 KiB
C
/* f/unix.c
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**
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** This file is in the public domain.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <dirent.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include "all.h"
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/* _unix_term(): u2_yes iff `tat` should be printed as a term.
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*/
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static u2_bean
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_unix_term(u2_atom tat)
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{
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c3_w met_w = u2_met(3, tat);
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if ( met_w >= 2 ) {
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c3_y *buf_y = alloca(met_w);
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c3_w i_w;
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u2_bytes(0, met_w, buf_y, tat);
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for ( i_w=0; i_w < met_w; i_w++ ) {
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if ( ((buf_y[i_w] < 'a') || (buf_y[i_w] > 'x')) && (buf_y[i_w] != '-') ) {
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return u2_no;
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}
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}
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return u2_yes;
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}
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else return u2_no;
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}
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static void _unix_dump(FILE*, u2_noun);
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/* _unix_dump_in(): dump in cell to file.
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*/
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static void
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_unix_dump_in(FILE* fil,
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u2_noun som)
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{
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if ( u2_no == u2_dust(som) ) {
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_unix_dump(fil, som);
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}
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else {
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_unix_dump(fil, u2_h(som));
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fprintf(fil, " ");
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_unix_dump_in(fil, u2_t(som));
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}
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}
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/* _unix_dump(): dump noun to file.
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*/
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static void
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_unix_dump(FILE* fil,
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u2_noun som)
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{
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if ( u2_no == u2_dust(som) ) {
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mpz_t amp;
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if ( u2_yes == _unix_term(som) ) {
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c3_w met_w = u2_met(3, som);
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c3_y *buf_y = alloca(met_w + 1);
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u2_bytes(0, met_w, buf_y, som);
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buf_y[met_w] = 0;
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fprintf(fil, "%%%s", buf_y);
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}
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else {
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u2_mp(amp, som);
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gmp_fprintf(fil, "%Zd", amp);
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mpz_clear(amp);
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}
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}
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else {
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fputc('[', fil);
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_unix_dump(fil, u2_h(som));
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fprintf(fil, " ");
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_unix_dump_in(fil, u2_t(som));
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fputc(']', fil);
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}
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}
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static u2_noun _unix_scan(u2_wire, FILE*);
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/* _unix_scan_cell(): scan cell or tuple.
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*/
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static u2_noun
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_unix_scan_cell(u2_wire wir_r,
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FILE* fil)
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{
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u2_noun hed = _unix_scan(wir_r, fil);
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c3_i c = fgetc(fil);
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if ( c == ' ' ) {
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u2_noun tal = _unix_scan_cell(wir_r, fil);
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return u2_bn_cell(wir_r, hed, tal);
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}
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else {
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c3_assert(c == ']');
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return hed;
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}
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}
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/* _unix_scan(): scan noun from file.
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*/
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static u2_noun
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_unix_scan(u2_wire wir_r,
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FILE* fil)
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{
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c3_i c = fgetc(fil);
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if ( c == '[' ) {
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return _unix_scan_cell(wir_r, fil);
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}
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else if ( c == '%' ) {
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c3_c buf[1025];
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fscanf(fil, "%1024[a-z-]", buf);
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return u2_bn_string(wir_r, buf);
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}
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else {
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mpz_t amp;
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ungetc(c, fil);
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mpz_init(amp);
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gmp_fscanf(fil, "%Zd", amp);
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return u2_bn_mp(wir_r, amp);
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}
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}
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/* u2_ux_read(): read a filesystem path/extension into an atom.
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*/
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u2_weak
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u2_ux_read(u2_ray wir_r,
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const c3_c* paf_c,
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const c3_c* ext_c)
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{
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c3_w len_w;
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c3_c* nam_c;
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if ( ext_c )
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len_w = strlen(paf_c) + 1 + strlen(ext_c);
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else len_w = strlen(paf_c);
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nam_c = alloca(len_w + 1);
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if ( ext_c ) {
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snprintf(nam_c, len_w + 1, "%s.%s", paf_c, ext_c);
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} else snprintf(nam_c, len_w + 1, "%s", paf_c);
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{
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c3_i fid_i;
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struct stat sat_s;
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c3_w fln_w;
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c3_c* fil_c;
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u2_atom fil;
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fid_i = open(nam_c, O_RDONLY, 0666);
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if ( (fid_i < 0) || (fstat(fid_i, &sat_s) < 0) ) {
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return u2_none;
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}
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fln_w = sat_s.st_size;
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fil_c = malloc(sat_s.st_size);
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if ( fln_w != read(fid_i, fil_c, fln_w) ) {
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return u2_none;
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}
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close(fid_i);
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fil = u2_rl_bytes(wir_r, fln_w, (c3_y *)fil_c);
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free(fil_c);
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return fil;
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}
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}
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/* u2_ux_read_deep(): read a filesystem path as a generic noun.
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*/
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u2_weak
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u2_ux_read_deep(u2_wire wir_r,
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const c3_c* paf_c,
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const c3_c* ext_c)
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{
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c3_w len_w;
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c3_c* nam_c;
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if ( ext_c )
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len_w = strlen(paf_c) + 1 + strlen(ext_c);
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else len_w = strlen(paf_c);
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nam_c = alloca(len_w + 1);
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if ( ext_c ) {
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snprintf(nam_c, len_w + 1, "%s.%s", paf_c, ext_c);
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} else snprintf(nam_c, len_w + 1, "%s", paf_c);
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{
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FILE* fil;
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u2_noun som;
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if ( !(fil = fopen(nam_c, "r")) ) {
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return u2_none;
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}
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som = _unix_scan(wir_r, fil);
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fclose(fil);
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return som;
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}
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}
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/* u2_ux_write(): write a path/extension as an atom.
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*/
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u2_bean
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u2_ux_write(u2_wire wir_r,
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u2_atom som,
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const c3_c* paf_c,
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const c3_c* ext_c)
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{
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c3_w len_w;
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c3_c* nam_c;
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if ( ext_c )
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len_w = strlen(paf_c) + 1 + strlen(ext_c);
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else len_w = strlen(paf_c);
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nam_c = alloca(len_w + 1);
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if ( ext_c ) {
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snprintf(nam_c, len_w + 1, "%s.%s", paf_c, ext_c);
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} else snprintf(nam_c, len_w + 1, "%s", paf_c);
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{
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c3_i fid_i;
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c3_w fln_w;
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c3_y* fil_y;
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fid_i = open(nam_c, O_WRONLY | O_CREAT, 0666);
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if ( fid_i < 0 ) {
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return u2_no;
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}
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fln_w = u2_met(3, som);
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fil_y = malloc(fln_w);
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u2_bytes(0, fln_w, fil_y, som);
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if ( fln_w != write(fid_i, fil_y, fln_w) ) {
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return u2_no;
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}
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close(fid_i);
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return u2_yes;
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}
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}
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/* u2_ux_write_deep(): write a path/extension as a generic noun.
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*/
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u2_bean
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u2_ux_write_deep(u2_wire wir_r,
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u2_noun som,
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const c3_c* paf_c,
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const c3_c* ext_c)
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{
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c3_w len_w;
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c3_c* nam_c;
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if ( ext_c )
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len_w = strlen(paf_c) + 1 + strlen(ext_c);
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else len_w = strlen(paf_c);
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nam_c = alloca(len_w + 1);
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if ( ext_c ) {
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snprintf(nam_c, len_w + 1, "%s.%s", paf_c, ext_c);
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} else snprintf(nam_c, len_w + 1, "%s", paf_c);
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{
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FILE* fil;
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if ( !(fil = fopen(nam_c, "w")) ) {
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return u2_no;
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}
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_unix_dump(fil, som);
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fclose(fil);
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return u2_yes;
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}
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}
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/* u2_ux_fresh(): true iff `oxt` is as fresh as `ext`.
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*/
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u2_bean
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u2_ux_fresh(const c3_c* paf_c,
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const c3_c* ext_c,
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const c3_c* oxt_c)
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{
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c3_w nam_w = strlen(paf_c) + 1 + strlen(ext_c);
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c3_w nom_w = strlen(paf_c) + 1 + strlen(oxt_c);
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c3_c* nam_c = alloca(nam_w + 1);
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c3_c* nom_c = alloca(nom_w + 1);
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struct stat nam_stat, nom_stat;
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snprintf(nam_c, nam_w + 1, "%s.%s", paf_c, ext_c);
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snprintf(nom_c, nom_w + 1, "%s.%s", paf_c, oxt_c);
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if ( stat(nam_c, &nam_stat) < 0 ) {
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return u2_no;
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}
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else {
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if ( (stat(nom_c, &nom_stat) < 0) ||
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#if defined(U2_OS_linux)
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(nam_stat.st_mtime > nom_stat.st_mtime)
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#elif defined(U2_OS_osx)
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(nam_stat.st_mtimespec.tv_sec > nom_stat.st_mtimespec.tv_sec) ||
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((nam_stat.st_mtimespec.tv_sec == (nam_stat.st_mtimespec.tv_sec)) &&
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(nam_stat.st_mtimespec.tv_nsec > nom_stat.st_mtimespec.tv_nsec))
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#elif defined(U2_OS_bsd)
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(nam_stat.st_mtim.tv_sec > nom_stat.st_mtim.tv_sec) ||
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((nam_stat.st_mtim.tv_sec == (nom_stat.st_mtim.tv_sec)) &&
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(nam_stat.st_mtim.tv_nsec > nom_stat.st_mtim.tv_nsec))
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#else
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#error "port: file time compare"
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#endif
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) {
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return u2_no;
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}
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else return u2_yes;
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}
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}
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