+/*
+ * Copyright (c) 1993-1994 by Xerox Corporation. All rights reserved.
+ *
+ * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
+ * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
+ *
+ * Permission is hereby granted to use or copy this program
+ * for any purpose, provided the above notices are retained on all copies.
+ * Permission to modify the code and to distribute modified code is granted,
+ * provided the above notices are retained, and a notice that the code was
+ * modified is included with the above copyright notice.
+ */
+/* An sprintf implementation that understands cords. This is probably */
+/* not terribly portable. It assumes an ANSI stdarg.h. It further */
+/* assumes that I can make copies of va_list variables, and read */
+/* arguments repeatedly by applying va_arg to the copies. This */
+/* could be avoided at some performance cost. */
+/* We also assume that unsigned and signed integers of various kinds */
+/* have the same sizes, and can be cast back and forth. */
+/* We assume that void * and char * have the same size. */
+/* All this cruft is needed because we want to rely on the underlying */
+/* sprintf implementation whenever possible. */
+
+#include "cord.h"
+#include "ec.h"
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include "gc.h"
+
+#define CONV_SPEC_LEN 50 /* Maximum length of a single */
+ /* conversion specification. */
+#define CONV_RESULT_LEN 50 /* Maximum length of any */
+ /* conversion with default */
+ /* width and prec. */
+
+
+static int ec_len(CORD_ec x)
+{
+ return(CORD_len(x[0].ec_cord) + (x[0].ec_bufptr - x[0].ec_buf));
+}
+
+/* Possible nonumeric precision values. */
+# define NONE -1
+# define VARIABLE -2
+/* Copy the conversion specification from CORD_pos into the buffer buf */
+/* Return negative on error. */
+/* Source initially points one past the leading %. */
+/* It is left pointing at the conversion type. */
+/* Assign field width and precision to *width and *prec. */
+/* If width or prec is *, VARIABLE is assigned. */
+/* Set *left to 1 if left adjustment flag is present. */
+/* Set *long_arg to 1 if long flag ('l' or 'L') is present, or to */
+/* -1 if 'h' is present. */
+static int extract_conv_spec(CORD_pos source, char *buf,
+ int * width, int *prec, int *left, int * long_arg)
+{
+ register int result = 0;
+ register int current_number = 0;
+ register int saw_period = 0;
+ register int saw_number = 0;
+ register int chars_so_far = 0;
+ register char current;
+
+ *width = NONE;
+ buf[chars_so_far++] = '%';
+ while(CORD_pos_valid(source)) {
+ if (chars_so_far >= CONV_SPEC_LEN) return(-1);
+ current = CORD_pos_fetch(source);
+ buf[chars_so_far++] = current;
+ switch(current) {
+ case '*':
+ saw_number = 1;
+ current_number = VARIABLE;
+ break;
+ case '0':
+ if (!saw_number) {
+ /* Zero fill flag; ignore */
+ break;
+ } /* otherwise fall through: */
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ case '8':
+ case '9':
+ saw_number = 1;
+ current_number *= 10;
+ current_number += current - '0';
+ break;
+ case '.':
+ saw_period = 1;
+ if(saw_number) {
+ *width = current_number;
+ saw_number = 0;
+ }
+ current_number = 0;
+ break;
+ case 'l':
+ case 'L':
+ *long_arg = 1;
+ current_number = 0;
+ break;
+ case 'h':
+ *long_arg = -1;
+ current_number = 0;
+ break;
+ case ' ':
+ case '+':
+ case '#':
+ current_number = 0;
+ break;
+ case '-':
+ *left = 1;
+ current_number = 0;
+ break;
+ case 'd':
+ case 'i':
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ case 'f':
+ case 'e':
+ case 'E':
+ case 'g':
+ case 'G':
+ case 'c':
+ case 'C':
+ case 's':
+ case 'S':
+ case 'p':
+ case 'n':
+ case 'r':
+ goto done;
+ default:
+ return(-1);
+ }
+ CORD_next(source);
+ }
+ return(-1);
+ done:
+ if (saw_number) {
+ if (saw_period) {
+ *prec = current_number;
+ } else {
+ *prec = NONE;
+ *width = current_number;
+ }
+ } else {
+ *prec = NONE;
+ }
+ buf[chars_so_far] = '\0';
+ return(result);
+}
+
+int CORD_vsprintf(CORD * out, CORD format, va_list args)
+{
+ CORD_ec result;
+ register int count;
+ register char current;
+ CORD_pos pos;
+ char conv_spec[CONV_SPEC_LEN + 1];
+
+ CORD_ec_init(result);
+ for (CORD_set_pos(pos, format, 0); CORD_pos_valid(pos); CORD_next(pos)) {
+ current = CORD_pos_fetch(pos);
+ if (current == '%') {
+ CORD_next(pos);
+ if (!CORD_pos_valid(pos)) return(-1);
+ current = CORD_pos_fetch(pos);
+ if (current == '%') {
+ CORD_ec_append(result, current);
+ } else {
+ int width, prec;
+ int left_adj = 0;
+ int long_arg = 0;
+ CORD arg;
+ size_t len;
+
+ if (extract_conv_spec(pos, conv_spec,
+ &width, &prec,
+ &left_adj, &long_arg) < 0) {
+ return(-1);
+ }
+ current = CORD_pos_fetch(pos);
+ switch(current) {
+ case 'n':
+ /* Assign length to next arg */
+ if (long_arg == 0) {
+ int * pos_ptr;
+ pos_ptr = va_arg(args, int *);
+ *pos_ptr = ec_len(result);
+ } else if (long_arg > 0) {
+ long * pos_ptr;
+ pos_ptr = va_arg(args, long *);
+ *pos_ptr = ec_len(result);
+ } else {
+ short * pos_ptr;
+ pos_ptr = va_arg(args, short *);
+ *pos_ptr = ec_len(result);
+ }
+ goto done;
+ case 'r':
+ /* Append cord and any padding */
+ if (width == VARIABLE) width = va_arg(args, int);
+ if (prec == VARIABLE) prec = va_arg(args, int);
+ arg = va_arg(args, CORD);
+ len = CORD_len(arg);
+ if (prec != NONE && len > (size_t)prec) {
+ if (prec < 0) return(-1);
+ arg = CORD_substr(arg, 0, prec);
+ len = prec;
+ }
+ if (width != NONE && len < (size_t)width) {
+ char * blanks = GC_MALLOC_ATOMIC(width-len+1);
+
+ memset(blanks, ' ', width-len);
+ blanks[width-len] = '\0';
+ if (left_adj) {
+ arg = CORD_cat(arg, blanks);
+ } else {
+ arg = CORD_cat(blanks, arg);
+ }
+ }
+ CORD_ec_append_cord(result, arg);
+ goto done;
+ case 'c':
+ if (width == NONE && prec == NONE) {
+ register char c;
+
+ c = (char)va_arg(args, int);
+ CORD_ec_append(result, c);
+ goto done;
+ }
+ break;
+ case 's':
+ if (width == NONE && prec == NONE) {
+ char * str = va_arg(args, char *);
+ register char c;
+
+ while ((c = *str++)) {
+ CORD_ec_append(result, c);
+ }
+ goto done;
+ }
+ break;
+ default:
+ break;
+ }
+ /* Use standard sprintf to perform conversion */
+ {
+ register char * buf;
+ va_list vsprintf_args;
+ int max_size = 0;
+ int res;
+# ifdef __va_copy
+ __va_copy(vsprintf_args, args);
+# else
+# if defined(__GNUC__) && !defined(__DJGPP__) /* and probably in other cases */
+ va_copy(vsprintf_args, args);
+# else
+ vsprintf_args = args;
+# endif
+# endif
+ if (width == VARIABLE) width = va_arg(args, int);
+ if (prec == VARIABLE) prec = va_arg(args, int);
+ if (width != NONE) max_size = width;
+ if (prec != NONE && prec > max_size) max_size = prec;
+ max_size += CONV_RESULT_LEN;
+ if (max_size >= CORD_BUFSZ) {
+ buf = GC_MALLOC_ATOMIC(max_size + 1);
+ } else {
+ if (CORD_BUFSZ - (result[0].ec_bufptr-result[0].ec_buf)
+ < max_size) {
+ CORD_ec_flush_buf(result);
+ }
+ buf = result[0].ec_bufptr;
+ }
+ switch(current) {
+ case 'd':
+ case 'i':
+ case 'o':
+ case 'u':
+ case 'x':
+ case 'X':
+ case 'c':
+ if (long_arg <= 0) {
+ (void) va_arg(args, int);
+ } else if (long_arg > 0) {
+ (void) va_arg(args, long);
+ }
+ break;
+ case 's':
+ case 'p':
+ (void) va_arg(args, char *);
+ break;
+ case 'f':
+ case 'e':
+ case 'E':
+ case 'g':
+ case 'G':
+ (void) va_arg(args, double);
+ break;
+ default:
+ return(-1);
+ }
+ res = vsprintf(buf, conv_spec, vsprintf_args);
+ len = (size_t)res;
+ if ((char *)(GC_word)res == buf) {
+ /* old style vsprintf */
+ len = strlen(buf);
+ } else if (res < 0) {
+ return(-1);
+ }
+ if (buf != result[0].ec_bufptr) {
+ register char c;
+
+ while ((c = *buf++)) {
+ CORD_ec_append(result, c);
+ }
+ } else {
+ result[0].ec_bufptr = buf + len;
+ }
+ }
+ done:;
+ }
+ } else {
+ CORD_ec_append(result, current);
+ }
+ }
+ count = ec_len(result);
+ *out = CORD_balance(CORD_ec_to_cord(result));
+ return(count);
+}
+
+int CORD_sprintf(CORD * out, CORD format, ...)
+{
+ va_list args;
+ int result;
+
+ va_start(args, format);
+ result = CORD_vsprintf(out, format, args);
+ va_end(args);
+ return(result);
+}
+
+int CORD_fprintf(FILE * f, CORD format, ...)
+{
+ va_list args;
+ int result;
+ CORD out;
+
+ va_start(args, format);
+ result = CORD_vsprintf(&out, format, args);
+ va_end(args);
+ if (result > 0) CORD_put(out, f);
+ return(result);
+}
+
+int CORD_vfprintf(FILE * f, CORD format, va_list args)
+{
+ int result;
+ CORD out;
+
+ result = CORD_vsprintf(&out, format, args);
+ if (result > 0) CORD_put(out, f);
+ return(result);
+}
+
+int CORD_printf(CORD format, ...)
+{
+ va_list args;
+ int result;
+ CORD out;
+
+ va_start(args, format);
+ result = CORD_vsprintf(&out, format, args);
+ va_end(args);
+ if (result > 0) CORD_put(out, stdout);
+ return(result);
+}
+
+int CORD_vprintf(CORD format, va_list args)
+{
+ int result;
+ CORD out;
+
+ result = CORD_vsprintf(&out, format, args);
+ if (result > 0) CORD_put(out, stdout);
+ return(result);
+}
projects / hs-boehmgc.git / blobdiff