/* cbake.l @BAKE flex @FILE && cc -Wall -Wextra -std=c99 -D_GNU_SOURCE -o @{@SHORT} lex.yy.c @ARGS -lfl @STOP */
-/* TODO: implement expunge */
+/* TODO: implement expunge, color */
%{
#include <ctype.h>
#undef ECHO
-#define ECHO do { fprintf(stdout, yytext); if (gpipe) { fprintf(gpipe, yytext); } } while (0)
-#define CHAR(c) do { fputc(c, stdout); if (gpipe) { fputc(c, gpipe); } } while (0)
-#define STRING(s) do { fputs(s, stdout); if (gpipe) { fputs(s, gpipe); } } while (0)
-#define FORMAT(...) do { fprintf(stdout, __VA_ARGS__); if (gpipe) { fprintf(gpipe, __VA_ARGS__); } } while (0)
-#define FWRITE(str, len) do { fwrite(str, 1, len, stdout); if (gpipe) { fwrite(str, 1, len, gpipe); } } while (0)
-
-FILE * gpipe;
-char * filename;
-int gac;
-char ** gav;
-int gselect = 1, line = 1, first_nl, expunge_depth = 0;
-int nth = 0, tmpline;
+#define ECHO do { fprintf(stdout, yytext); if (g_pipe) { fprintf(g_pipe, yytext); } } while (0)
+#define CHAR(c) do { fputc(c, stdout); if (g_pipe) { fputc(c, g_pipe); } } while (0)
+#define STRING(s) do { fputs(s, stdout); if (g_pipe) { fputs(s, g_pipe); } } while (0)
+#define FORMAT(...) do { fprintf(stdout, __VA_ARGS__); if (g_pipe) { fprintf(g_pipe, __VA_ARGS__); } } while (0)
+#define FWRITE(str, len) do { fwrite(str, 1, len, stdout); if (g_pipe) { fwrite(str, 1, len, g_pipe); } } while (0)
+
+/* input from main to lexer */
+FILE * g_pipe;
+char * g_filename;
+int g_ac;
+char ** g_av;
+int g_select = 1;
+/* for the lexers eyes only */
+int line = 1, nth = 0, expunge_depth = 0, first_nl, tmpline;
extern void root(char * filename);
extern void args(int n);
%x FOUND PADDING STOP
%option nodefault noinput nounput noyywrap
%%
+
@BAKE[[:space:]] { bake:
first_nl = 1;
+
if (yytext[yyleng-1] == '\n') { ++line; }
- if (gselect < 0) { printf("\n%s:%d:s%d: ", filename, line, ++nth); BEGIN FOUND; }
- else if (!--gselect) { BEGIN FOUND; }
+ if (!g_select) { ; }
+ else if (g_select < 0) { BEGIN FOUND; printf("\n%s:%d:s%d: ", g_filename, line, ++nth); }
+ else if (!--g_select) { BEGIN FOUND; }
}
+
\n { ++line; }
. {;}
+
<FOUND>{
- @BAKE|@STOP { BEGIN INITIAL; yyless(0); if (first_nl) { putchar('\n'); } if (!gselect) { return 0; } }
- @FILENAME|@FILE|$@ { STRING(filename); }
- @SHORT:[[:digit:]]+ { shorten(filename, atoi(strrchr(yytext, ':')+1)); }
- @SHORT|$\* { shorten(filename, 1); }
- @ARGS:[[:digit:]]+ { args(atoi(strrchr(yytext, ':')+1)); }
- @ARGS|$\+ { args(-1); }
- @LINE { FORMAT("%d", line); }
- @\{ { ++expunge_depth; }
- \} { if (!expunge_depth--) { ECHO; } }
- \\\n { ++line; CHAR(' '); BEGIN PADDING; }
- \\{MACROS} { STRING(yytext + 1); }
- \n { putchar('\n'); ++line; if (first_nl) { first_nl = 0; tmpline = 0; BEGIN STOP; } }
- {SPACE} { BEGIN PADDING; CHAR(' '); }
- . { ECHO; }
+ @BAKE[[:space:]]|@STOP { BEGIN INITIAL; yyless(0); if (first_nl) { CHAR('\n'); } if (!g_select) { return 0; } }
+ @FILENAME|@FILE|$@ { STRING(g_filename); }
+ @SHORT:[[:digit:]]+ { shorten(g_filename, atoi(strrchr(yytext, ':')+1)); }
+ @SHORT|$\* { shorten(g_filename, 1); }
+ @ARGS:[[:digit:]]+ { args(atoi(strrchr(yytext, ':')+1)); }
+ @ARGS|$\+ { args(-1); }
+ @LINE { FORMAT("%d", line); }
+ @\{ { ++expunge_depth; }
+ \} { if (!expunge_depth--) { ECHO; } }
+ \\\n { BEGIN PADDING; ++line; CHAR(' '); }
+ \\{MACROS} { STRING(yytext + 1); }
+ \n { CHAR('\n'); ++line; if (first_nl) { BEGIN STOP; first_nl = 0; tmpline = 0; } }
+ {SPACE} { BEGIN PADDING; CHAR(' '); }
+ . { ECHO; }
}
+
<PADDING>{
- {SPACE} { ; }
+ {SPACE} { ; }
.|\n { yyless(0); BEGIN FOUND; }
}
+
<STOP>{
@BAKE[[:space:]] { line += tmpline; goto bake; }
- @STOP { yyless(0); BEGIN FOUND; }
- \n { ++tmpline; yymore(); }
- .|\\@ { yymore(); }
+ @STOP { BEGIN FOUND; yyless(0); }
+ \n { ++tmpline; yymore(); }
+ .|\\@ { yymore(); }
}
+
%%
void root(char * filename) {
}
void args(int n) {
- if (n < 0) { for (int i = 0; i < gac; ++i) { STRING(gav[i]); if (i + 1 < gac) { CHAR(' '); } } }
- else if (n < gac) { STRING(gav[n]); }
+ if (n < 0) { for (int i = 0; i < g_ac; ++i) { STRING(g_av[i]); if (i + 1 < g_ac) { CHAR(' '); } } }
+ else if (n < g_ac) { STRING(g_av[n]); }
}
void shorten(char * filename, int n) {
char * end = filename + strlen(filename);
while (n && (end = memrchr(filename, '.', end - filename))) { --n; }
- if (!end) { fprintf(stderr, "<SHORTEN> context error: Argument out of range.\n"); STRING("idiot"); return; }
+ if (!end) {
+ fprintf(stderr, "<SHORTEN> context error: Argument out of range.\n");
+ /* Ensures consistency. @SHORT will always return *something* that isn't filename */
+ STRING("idiot");
+ return;
+ }
FWRITE(filename, end - filename);
}
-void help(void) { puts("bake(1) - \"Buy high. Sell low.\"\n"); }
+void help(void) { fputs("see bake(1) - \"Buy high. Sell low.\"\n", stderr); }
int main (int ac, char ** av) {
int run = 1;
char * av0 = av[0];
FILE * fp;
+ /* supports long/short, -allinone, (-X ... -X=... -X<NUM>) */
while (++av, --ac) {
size_t i;
if (av[0][0] != '-') { goto start; }
if (av[0][1] == '-') {
- if (av[0][2] == '\0') { ++av, --ac; goto start; }
- if (!strcmp(av[0]+2, "dry-run")) { i = strlen(av[0]); goto opt_dry_run; }
- if (!strcmp(av[0]+2, "select" )) { if (!ac-1 || isdigit(av[1][0])) { goto opt_arg; } ++av, --ac;
- i = strlen(av[0]); goto opt_select; }
- if (!strcmp(av[0]+2, "list" )) { i = strlen(av[0]); goto opt_list; }
- if (!strcmp(av[0]+2, "help" )) { goto opt_help; }
+ if (av[0][2] == '\0') { ++av, --ac; goto start; }
+ if (!strcmp(av[0]+2, "dry-run")) { i = strlen(av[0]); goto opt_dry_run; }
+ if (!strcmp(av[0]+2, "select" )) { if (!ac-1 || isdigit(av[1][0])) { goto opt_arg; }
+ ++av, --ac; i = strlen(av[0]); goto opt_select; }
+ if (!strcmp(av[0]+2, "list" )) { i = strlen(av[0]); goto opt_list; }
+ if (!strcmp(av[0]+2, "help" )) { goto opt_help; }
goto opt_default;
}
for (i = 1; i < strlen(av[0]); ++i) {
switch (av[0][i]) {
opt_dry_run: case 'n': run = 0; break;
- opt_select: case 's': gselect = atoi(av[0]+i+1+(av[0][i+1] == '=')); i = strlen(av[0]); break;
- opt_list: case 'l': run = 0; gselect = -1; break;
+ case 's':
+ /* Covers cases -<LAST>s<NUM> -<LAST>s <NUM> */
+ if (isdigit(av[0][i+1])) { g_select = atoi(av[0]+i+1); }
+ else if (ac > 1 && isdigit(av[1][0])) { ++av, --ac; opt_select: g_select = atoi(av[0]); }
+ else { g_select = 0; }
+ if (!g_select) { fprintf(stderr, "%s: Invalid argument for -s\n", av0); return 1; }
+ i = strlen(av[0]);
+ break;
+ opt_list: case 'l': run = 0; g_select = -1; break;
opt_help: case 'h': help(); return 0;
- opt_default: default: fprintf(stderr, "%s: Unknown option '%s'\n", av0, av[0]); return 1;
- opt_arg: fprintf(stderr, "%s: Argument missing for '%s'\n", av0, av[0]); return 1;
+ opt_default: default: fprintf(stderr, "%s: Unknown option '%s'\n", av0, av[0]); return 1;
+ opt_arg: fprintf(stderr, "%s: Argument missing for '%s'\n", av0, av[0]); return 1;
}
}
}
start:
if (!ac) { fprintf(stderr, "%s: Missing filename\n", av0); return 1; }
- if (!gselect) { fprintf(stderr, "%s: Out of range\n", av0); return 1; }
-
- /* filename and self placement */
- filename = av[0];
- root(filename);
- {
- char * tmp = strrchr(filename, '/');
- if (tmp) { filename = tmp+1; }
+ if (!g_select) { goto out_of_range; }
+
+ g_filename = av[0];
+ root(g_filename);
+ { /* ensures the filename doesn't have a relative path that would misdirect the command within the new root */
+ char * tmp = strrchr(g_filename, '/');
+ if (tmp) { g_filename = tmp+1; }
}
/* open and prepare ac, av */
- if (!(yyin = fp = fopen(filename, "rb")))
- { fprintf(stderr, "%s: '%s' %s\n", av0, filename, strerror(errno)); return 1; }
- gac = --ac, gav = ++av;
+ if (!(yyin = fp = fopen(g_filename, "rb")))
+ { fprintf(stderr, "%s: '%s' %s\n", av0, g_filename, strerror(errno)); return 1; }
+ g_ac = --ac, g_av = ++av;
+ /* Prepares our UNIX pipe for input */
if (run) {
- gpipe = popen("/bin/sh -e", "w");
- if (!gpipe) { fprintf(stderr, "%s: <gpipe> %s\n", av0, strerror(errno)); return 1; }
+ g_pipe = popen("/bin/sh -e", "w");
+ if (!g_pipe) { fprintf(stderr, "%s: <g_pipe> %s\n", av0, strerror(errno)); return 1; }
}
- if (gselect > 0) { fprintf(stderr, "%s: ", av0); fflush(stderr); }
+ if (g_select > 0) { fprintf(stderr, "%s: ", av0); fflush(stderr); }
yylex(); fflush(stdout);
fclose(fp);
- if (gselect > 0) { fprintf(stderr, "%s: Out of range\n", av0); }
+ if (g_select > 0) { pclose(g_pipe); goto out_of_range; }
if (!run) { return 0; }
fprintf(stderr, "output: "); fflush(stderr);
- run = pclose(gpipe); /* repurposed run */
+ run = pclose(g_pipe); /* repurposed run */
if (run) { printf("%s: Exit code %d\n", av0, run); }
return run;
+ out_of_range: fprintf(stderr, "%s: <%d> Out of range\n", av0, g_select); return 1;
}
projects / emil-bake.git / commitdiff