ref: 16049bbbdc7b5a3c4c2eafc9c07ede1c2f0aa85f
dir: /pp.c/
/* Pretty-print input source by emitting parse tree back as syntax. * with no flags: pretty-printed source * with -m: minified source with line breaks * with -mm: minified source without line breaks * with -s: s-expression syntax tree */ #include <stdio.h> #include "jsi.h" #include "jsparse.h" static void js_ppstring(js_State *J, const char *filename, const char *source, int minify) { js_Ast *P; if (js_try(J)) { jsP_freeparse(J); js_throw(J); } P = jsP_parse(J, filename, source); if (minify > 2) jsP_dumplist(J, P); else jsP_dumpsyntax(J, P, minify); jsP_freeparse(J); js_endtry(J); } void js_ppfile(js_State *J, const char *filename, int minify) { FILE *f; char *s; int n, t; f = fopen(filename, "rb"); if (!f) { js_error(J, "cannot open file: '%s'", filename); } if (fseek(f, 0, SEEK_END) < 0) { fclose(f); js_error(J, "cannot seek in file: '%s'", filename); } n = ftell(f); if (n < 0) { fclose(f); js_error(J, "cannot tell in file: '%s'", filename); } if (fseek(f, 0, SEEK_SET) < 0) { fclose(f); js_error(J, "cannot seek in file: '%s'", filename); } s = js_malloc(J, n + 1); /* add space for string terminator */ if (!s) { fclose(f); js_error(J, "cannot allocate storage for file contents: '%s'", filename); } t = fread(s, 1, (size_t)n, f); if (t != n) { js_free(J, s); fclose(f); js_error(J, "cannot read data from file: '%s'", filename); } s[n] = 0; /* zero-terminate string containing file data */ if (js_try(J)) { js_free(J, s); fclose(f); js_throw(J); } js_ppstring(J, filename, s, minify); js_free(J, s); fclose(f); js_endtry(J); } int main(int argc, char **argv) { js_State *J; int minify = 0; int i; J = js_newstate(NULL, NULL, 0); for (i = 1; i < argc; ++i) { if (!strcmp(argv[i], "-m")) minify = 1; else if (!strcmp(argv[i], "-mm")) minify = 2; else if (!strcmp(argv[i], "-s")) minify = 3; else { if (js_try(J)) { js_report(J, js_trystring(J, -1, "Error")); js_pop(J, 1); continue; } js_ppfile(J, argv[i], minify); js_endtry(J); } } js_gc(J, 0); js_freestate(J); return 0; }